| Pond Evaporation Calculation | 1/31/26 | |||||||||||||
| Weather Station Data provided by Northern Colorado Water Conservancy District | ||||||||||||||
| See Weather Station Location Map at: | ||||||||||||||
| http://www.northernwater.org/WaterConservation/WeatherandETData.aspx | ||||||||||||||
| Notes: | ||||||||||||||
| Current month reflects values through "Reference Date". | ||||||||||||||
| Pond Evap. calculated per recent Division 1 Water Court decree language: | Lower South Platte Home Page | |||||||||||||
| Gross Pond = .84(Alfalfa ETr) | Pond Evaporation Reports Main Menu | |||||||||||||
| Net Pond = .84(Alfalfa ETr) - .7(Total Precip) | ||||||||||||||
| Alfalfa reference ETr computed by Standard ASCE equation from daily weather data. | ||||||||||||||
| Winter pond evap. is a reference for unfrozen ponds. | ||||||||||||||
| For Growing Degree Days: | ||||||||||||||
| Tmax = 86° F, Tmin = 50° F and Tbase = 50° F | ||||||||||||||
| Totals | ||||||||||||||
| Weather Station | 2025 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | or Avg. |
| Ovid | Avg. Temp ° F | 22.49 | 23.56 | 42.84 | 49.13 | 58.28 | 70.36 | 74.56 | 70.98 | 63.82 | 50.73 | 39.69 | 36.21 | 50.22 |
| Ref date as of 12/31/2025 | Total Precip " | 0.24 | 0.31 | 1.43 | 0.53 | 4.72 | 4.08 | 1.33 | 3.17 | 0.75 | 0.17 | 0.69 | 0.03 | 17.45 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 2.21 | 2.97 | 6.29 | 7.27 | 8.11 | 9.72 | 9.52 | 7.02 | 5.31 | 4.17 | 3.11 | 3.97 | 69.67 |
| Total Growing Degee Days from March 1 | 0 | 0 | 196 | 241 | 344 | 563 | 685 | 627 | 455 | 266 | 138 | 121 | 3636 | |
| Gross Pond Evap | Total " | 1.86 | 2.49 | 5.28 | 6.11 | 6.81 | 8.16 | 8 | 5.9 | 4.46 | 3.5 | 2.61 | 3.33 | 58.51 |
| Net Pond Evap | Total " | 1.69 | 2.28 | 4.28 | 5.74 | 3.51 | 5.31 | 7.07 | 3.68 | 3.94 | 3.38 | 2.13 | 3.31 | 46.32 |
| Crook | Avg. Temp ° F | 22.07 | 24.33 | 42.84 | 48.39 | 57.82 | 69.13 | 72.78 | 70.27 | 63.24 | 51.42 | 40.45 | 35.49 | 49.85 |
| Ref date as of 12/31/2025 | Total Precip " | 0.14 | 0.24 | 0.49 | 0.4 | 2.91 | 3.8 | 3.21 | 1.34 | 3.03 | 0.53 | 0.34 | 0 | 16.43 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 2.16 | 3.14 | 6.6 | 7.28 | 7.95 | 9.53 | 8.68 | 6.98 | 5.9 | 5.11 | 4.12 | 4.05 | 71.5 |
| Total Growing Degee Days from March 1 | 0 | 0 | 194 | 240 | 344 | 532 | 650 | 596 | 460 | 291 | 175 | 122 | 3604 | |
| Gross Pond Evap | Inch | 1.81 | 2.64 | 5.54 | 6.12 | 6.68 | 8.01 | 7.29 | 5.86 | 4.96 | 4.29 | 3.46 | 3.4 | 60.06 |
| Net Pond Evap | Inch | 1.72 | 2.47 | 5.2 | 5.84 | 4.64 | 5.35 | 5.04 | 4.93 | 2.84 | 3.92 | 3.22 | 3.4 | 48.57 |
| Sterling | Avg. Temp ° F | 21.42 | 25.54 | 43.16 | 48.17 | 58.28 | 69.09 | 73.29 | 70.35 | 62.65 | 51 | 39.98 | 34.76 | 49.81 |
| Ref date as of 12/31/2025 | Total Precip " | 0.36 | 0.31 | 0.33 | 0.89 | 1.04 | 4.09 | 2.73 | 2.99 | 4.08 | 0.44 | 0.25 | 0.04 | 17.55 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 1.85 | 3.09 | 6.35 | 6.68 | 8.16 | 9.21 | 9.36 | 7.29 | 5.58 | 4.59 | 3.61 | 3.48 | 69.25 |
| Total Growing Degee Days from March 1 | 0 | 0 | 208 | 235 | 358 | 539 | 651 | 593 | 451 | 289 | 170 | 121 | 3615 | |
| Gross Pond Evap | Inch | 1.55 | 2.6 | 5.33 | 5.61 | 6.85 | 7.74 | 7.86 | 6.12 | 4.69 | 3.86 | 3.03 | 2.92 | 58.16 |
| Net Pond Evap | Inch | 1.3 | 2.38 | 5.1 | 4.99 | 6.13 | 4.87 | 5.95 | 4.03 | 1.83 | 3.55 | 2.86 | 2.9 | 45.89 |
| Brush | Avg. Temp ° F | 20.64 | 26.28 | 43.56 | 47.75 | 56.89 | 68.38 | 72.96 | 69.63 | 62.95 | 50.81 | 40.07 | 34.85 | 49.56 |
| Ref date as of 12/31/2025 | Total Precip " | 0.88 | 0.38 | 0.87 | 0.66 | 0.89 | 3.87 | 2.66 | 2.96 | 3.57 | 0.29 | 0.46 | 0.13 | 17.62 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 1.51 | 2.74 | 5.97 | 6.47 | 6.83 | 8.71 | 8.88 | 7 | 5.71 | 4.67 | 3.37 | 3.33 | 65.19 |
| Total Growing Degee Days from March 1 | 0 | 0 | 211 | 250 | 343 | 538 | 662 | 601 | 471 | 299 | 182 | 141 | 3698 | |
| Gross Pond Evap | Inch | 1.27 | 2.3 | 5.01 | 5.43 | 5.74 | 7.32 | 7.46 | 5.88 | 4.8 | 3.92 | 2.83 | 2.8 | 54.76 |
| Net Pond Evap | Inch | 0.65 | 2.04 | 4.41 | 4.97 | 5.11 | 4.61 | 5.6 | 3.81 | 2.3 | 3.72 | 2.51 | 2.71 | 42.44 |
| Fort Morgan | Avg. Temp ° F | 22.75 | 27.63 | 45.08 | 49.54 | 58.99 | 70.2 | 74.64 | 71.43 | 64.33 | 52.01 | 41.19 | 35.49 | 51.11 |
| Ref date as of 12/31/2025 | Total Precip " | 0.39 | 0.31 | 1.24 | 0.7 | 1.38 | 4.62 | 3.07 | 3.25 | 3.79 | 0.79 | 0.71 | 0.02 | 20.27 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 1.63 | 2.69 | 5.59 | 6.2 | 7.13 | 8.43 | 8.66 | 7.18 | 5.55 | 4.32 | 3.14 | 2.97 | 63.49 |
| Total Growing Degee Days from March 1 | 0 | 0 | 218 | 258 | 372 | 565 | 691 | 642 | 488 | 299 | 178 | 132 | 3843 | |
| Gross Pond Evap | Inch | 1.37 | 2.26 | 4.7 | 5.21 | 5.99 | 7.08 | 7.27 | 6.03 | 4.66 | 3.63 | 2.64 | 2.49 | 53.33 |
| Net Pond Evap | Inch | 1.1 | 2.04 | 3.83 | 4.72 | 5.02 | 3.85 | 5.13 | 3.76 | 2.01 | 3.08 | 2.14 | 2.48 | 39.16 |
| Wiggins | Avg. Temp ° F | 21.47 | 26.6 | 43.9 | 48.18 | 57.21 | 69.12 | 73.24 | 70.45 | 63.12 | 51.16 | 40.46 | 34.66 | 49.96 |
| Ref date as of 12/31/2025 | Total Precip " | 0.33 | 0.29 | 0.93 | 0.43 | 2.17 | 2.41 | 4.34 | 1.22 | 2.04 | 0.32 | 0.43 | 0.13 | 15.04 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 1.78 | 2.99 | 6.29 | 6.8 | 7.42 | 9.41 | 9.52 | 8.06 | 6.03 | 5.11 | 3.45 | 3.34 | 70.2 |
| Total Growing Degee Days from March 1 | 0 | 0 | 209 | 247 | 342 | 530 | 660 | 611 | 464 | 301 | 176 | 135 | 3675 | |
| Gross Pond Evap | Inch | 1.5 | 2.51 | 5.28 | 5.71 | 6.23 | 7.9 | 8 | 6.77 | 5.07 | 4.29 | 2.9 | 2.81 | 58.97 |
| Net Pond Evap | Inch | 1.26 | 2.31 | 4.63 | 5.41 | 4.71 | 6.22 | 4.96 | 5.92 | 3.64 | 4.07 | 2.6 | 2.71 | 48.44 |
| Fort Collins East | Avg. Temp ° F | 21.94 | 29.23 | 44.8 | 47.65 | 56.86 | 67.35 | 73.5 | 70.37 | 62.57 | 49.98 | 42.24 | 37.74 | 50.35 |
| Ref date as of 12/31/2025 | Total Precip " | 0.37 | 0.13 | 0.88 | 0.5 | 2.33 | 0.83 | 0.08 | 1.39 | 1.87 | 0.37 | 0.05 | 0.43 | 9.23 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 2.1 | 3.27 | 6.29 | 6.5 | 7.24 | 8.39 | 9.97 | 8.17 | 6.13 | 4.53 | 3.71 | 3.85 | 70.15 |
| Total Growing Degee Days from March 1 | 0 | 0 | 184 | 223 | 332 | 496 | 625 | 582 | 446 | 263 | 163 | 131 | 3445 | |
| Gross Pond Evap | Inch | 1.76 | 2.75 | 5.28 | 5.46 | 6.08 | 7.05 | 8.37 | 6.86 | 5.15 | 3.81 | 3.12 | 3.23 | 58.92 |
| Net Pond Evap | Inch | 1.51 | 2.66 | 4.67 | 5.11 | 4.45 | 6.47 | 8.32 | 5.89 | 3.84 | 3.55 | 3.08 | 2.93 | 52.48 |
| Eaton | Avg. Temp ° F | 22.02 | 27.93 | 44.18 | 47.88 | 56.78 | 66.5 | 71.05 | 68.5 | 61.2 | 49.42 | 41.06 | 35.59 | 49.34 |
| Ref date as of 12/31/2025 | Total Precip " | 0.34 | 0.22 | 1.08 | 0.35 | 2.87 | 2.31 | 1.11 | 1.28 | 1.97 | 0.18 | 0.08 | 0.39 | 12.18 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 1.99 | 3.15 | 6.48 | 6.71 | 6.47 | 7.31 | 7.94 | 6.89 | 5.23 | 4.17 | 3.69 | 3.59 | 63.62 |
| Total Growing Degee Days from March 1 | 0 | 0 | 190 | 231 | 331 | 484 | 623 | 568 | 428 | 263 | 166 | 112 | 3396 | |
| Gross Pond Evap | Inch | 1.67 | 2.65 | 5.44 | 5.64 | 5.43 | 6.14 | 6.67 | 5.79 | 4.39 | 3.5 | 3.1 | 3.02 | 53.44 |
| Net Pond Evap | Inch | 1.43 | 2.49 | 4.69 | 5.39 | 3.43 | 4.52 | 5.89 | 4.89 | 3.01 | 3.38 | 3.04 | 2.74 | 44.9 |
| Johnsons Corner | Avg. Temp ° F | 23.42 | 29.52 | 46.14 | 48.65 | 56.65 | 67.76 | 73.76 | 71.11 | 63.93 | 52.18 | 44.35 | 39.51 | 51.42 |
| Ref date as of 12/31/2025 | Total Precip " | 0.63 | 0.44 | 1.36 | 0.62 | 2.51 | 1.87 | 0.54 | 2.17 | 2.24 | 0.41 | 0.06 | 0.46 | 13.31 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 1.77 | 2.91 | 5.85 | 6.11 | 6.46 | 7.92 | 9.29 | 7.74 | 5.7 | 4.25 | 3.37 | 3.4 | 64.77 |
| Total Growing Degee Days from March 1 | 0 | 0 | 177 | 217 | 311 | 498 | 665 | 619 | 450 | 257 | 163 | 124 | 3481 | |
| Gross Pond Evap | Inch | 1.49 | 2.44 | 4.91 | 5.13 | 5.43 | 6.65 | 7.8 | 6.5 | 4.79 | 3.57 | 2.83 | 2.86 | 54.4 |
| Net Pond Evap | Inch | 1.05 | 2.14 | 3.96 | 4.7 | 3.67 | 5.34 | 7.43 | 4.98 | 3.22 | 3.28 | 2.79 | 2.53 | 45.09 |
| Gilcrest | Avg. Temp ° F | 21.11 | 28.43 | 45.65 | 49.34 | 58.06 | 69.25 | 74.25 | 70.88 | 62.89 | 50.91 | 41.6 | 36.3 | 50.72 |
| Ref date as of 12/31/2025 | Total Precip " | 0.43 | 0.26 | 1.47 | 0.5 | 3.02 | 2.38 | 1.43 | 1.85 | 2.8 | 0.8 | 0.13 | 0.26 | 15.33 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 1.7 | 3 | 6.07 | 6.41 | 7.03 | 8.83 | 9.51 | 7.18 | 5.33 | 4.15 | 3.02 | 3.47 | 65.7 |
| Total Growing Degee Days from March 1 | 0 | 0 | 199 | 241 | 346 | 527 | 669 | 613 | 461 | 288 | 177 | 125 | 3646 | |
| Gross Pond Evap | Inch | 1.43 | 2.52 | 5.1 | 5.38 | 5.91 | 7.42 | 7.99 | 6.03 | 4.48 | 3.49 | 2.54 | 2.91 | 55.2 |
| Net Pond Evap | Inch | 1.13 | 2.34 | 4.07 | 5.03 | 3.79 | 5.75 | 6.99 | 4.74 | 2.52 | 2.93 | 2.45 | 2.73 | 44.47 |
| Longmont South | Avg. Temp ° F | 23.65 | 30.45 | 46.65 | 48.69 | 56.17 | 67.8 | 72.49 | 69.76 | 62.73 | 51.59 | 44.56 | 40.76 | 51.28 |
| Ref date as of 12/31/2025 | Total Precip " | 0.67 | 0.27 | 1.57 | 1.03 | 2.66 | 1.06 | 1.89 | 0.66 | 1.68 | 0.38 | 0.07 | 0.67 | 12.61 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 1.82 | 3.01 | 6.33 | 5.76 | 6.09 | 8.04 | 8.54 | 7.24 | 5.32 | 4.06 | 3.79 | 3.83 | 63.83 |
| Total Growing Degee Days from March 1 | 0 | 0 | 183 | 214 | 310 | 480 | 624 | 572 | 428 | 263 | 175 | 142 | 3391 | |
| Gross Pond Evap | Inch | 1.53 | 2.53 | 5.32 | 4.84 | 5.12 | 6.75 | 7.17 | 6.08 | 4.47 | 3.41 | 3.18 | 3.22 | 53.62 |
| Net Pond Evap | Inch | 1.06 | 2.34 | 4.22 | 4.12 | 3.25 | 6.01 | 5.85 | 5.62 | 3.29 | 3.14 | 3.13 | 2.75 | 44.78 |
| Fort Collins NW | Avg. Temp ° F | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Ref date as of 5/2/2010 | Total Precip " | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Site Type: Turf | Total Alfalfa ETr " | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Total Growing Degee Days from March 1 | 0 | 0 | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 | |
| Gross Pond Evap | Inch | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Net Pond Evap | Inch | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Fort Collins Central | Avg. Temp ° F | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Ref date as of 122823/0/2023 | Total Precip " | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Total Growing Degee Days from March 1 | 0 | 0 | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 | |
| Gross Pond Evap | Inch | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Net Pond Evap | Inch | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Windsor | Avg. Temp ° F | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Ref date as of 5/2/2010 | Total Precip " | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Site Type: Turf | Total Alfalfa ETr " | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Total Growing Degee Days from March 1 | 0 | 0 | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 | |
| Gross Pond Evap | Inch | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Net Pond Evap | Inch | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Greeley West | Avg. Temp ° F | 19.91 | 25.9 | 42.59 | 46 | 54.59 | 65.67 | 71.34 | 68.54 | 62.42 | 51.52 | 42.72 | 37.3 | 49.04 |
| Ref date as of 12/31/2025 | Total Precip " | 0.43 | 0.31 | 1.25 | 0.79 | 4.14 | 1.47 | 1.07 | 2.48 | 2.39 | 0.22 | 0.1 | 0.31 | 14.96 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 1.29 | 2.21 | 4.63 | 5.08 | 5.74 | 6.79 | 7.82 | 6.35 | 4.47 | 3.25 | 2.24 | 2.37 | 52.24 |
| Total Growing Degee Days from March 1 | 0 | 0 | 141 | 187 | 275 | 465 | 627 | 564 | 420 | 255 | 155 | 111 | 3200 | |
| Gross Pond Evap | Inch | 1.08 | 1.86 | 3.89 | 4.27 | 4.82 | 5.7 | 6.57 | 5.33 | 3.75 | 2.73 | 1.88 | 1.99 | 43.87 |
| Net Pond Evap | Inch | 0.78 | 1.64 | 3.01 | 3.71 | 1.92 | 4.67 | 5.82 | 3.6 | 2.08 | 2.58 | 1.81 | 1.77 | 33.39 |
| Loveland | Avg. Temp ° F | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Ref date as of 122823/0/2023 | Total Precip " | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Total Growing Degee Days from March 1 | 0 | 0 | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 | |
| Gross Pond Evap | Inch | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Net Pond Evap | Inch | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Berthoud | Avg. Temp ° F | 24.75 | 31.08 | 47.51 | 50.09 | 58.23 | 69.45 | 75.05 | 72.35 | 65.05 | 52.69 | 44.91 | 40.18 | 52.61 |
| Ref date as of 12/31/2025 | Total Precip " | 0 | 0.39 | 1.49 | 0.65 | 1.9 | 1.82 | 0.89 | 1.29 | 1.19 | 0.37 | 0.05 | 0.33 | 10.37 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 1.57 | 2.7 | 5.37 | 5.57 | 6.15 | 7.67 | 8.29 | 6.91 | 5.21 | 3.71 | 2.78 | 2.9 | 58.83 |
| Total Growing Degee Days from March 1 | 0 | 0 | 185 | 224 | 326 | 541 | 711 | 655 | 476 | 257 | 161 | 121 | 3657 | |
| Gross Pond Evap | Inch | 1.32 | 2.27 | 4.51 | 4.68 | 5.17 | 6.44 | 6.96 | 5.8 | 4.38 | 3.12 | 2.34 | 2.44 | 49.43 |
| Net Pond Evap | Inch | 1.32 | 2 | 3.47 | 4.22 | 3.84 | 5.17 | 6.34 | 4.9 | 3.54 | 2.86 | 2.3 | 2.21 | 42.17 |
| Longmont West | Avg. Temp ° F | 23.46 | 30.83 | 46.8 | 49.43 | 57.45 | 109.31 | 74.11 | 71.15 | 64.04 | 52.18 | 44.87 | 40.73 | 55.36 |
| Ref date as of 12/31/2025 | Total Precip " | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 1.37 | 2.57 | 5.36 | 5.81 | 5.48 | 34.89 | 7.17 | 5.83 | 4.25 | 3.14 | 2.42 | 2.5 | 80.79 |
| Total Growing Degee Days from March 1 | 0 | 0 | 185 | 220 | 314 | 695 | 671 | 615 | 453 | 274 | 169 | 137 | 3733 | |
| Gross Pond Evap | Inch | 1.15 | 2.16 | 4.5 | 4.88 | 4.6 | 29.31 | 6.02 | 4.9 | 3.57 | 2.64 | 2.03 | 2.1 | 67.86 |
| Net Pond Evap | Inch | 1.15 | 2.16 | 4.5 | 4.88 | 4.6 | 29.31 | 6.02 | 4.9 | 3.57 | 2.64 | 2.03 | 2.1 | 67.86 |
| Fort Lupton | Avg. Temp ° F | 23.63 | 29.67 | 47.31 | 50.22 | 58.92 | 71.33 | 77.1 | 74.27 | 65.64 | 52.51 | 44.38 | 40.05 | 52.92 |
| Ref date as of 12/31/2025 | Total Precip " | 0.62 | 0.32 | 1.83 | 0.82 | 2.5 | 2.7 | 5.37 | 1.38 | 1.66 | 0.41 | 0.4 | 1.45 | 19.46 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 2.2 | 3.38 | 6.67 | 6.65 | 7.18 | 9.19 | 10.45 | 8.98 | 6.64 | 4.93 | 3.95 | 4.02 | 74.24 |
| Total Growing Degee Days from March 1 | 0 | 0 | 210 | 248 | 356 | 570 | 732 | 684 | 491 | 268 | 169 | 137 | 3865 | |
| Gross Pond Evap | Inch | 1.85 | 2.84 | 5.6 | 5.59 | 6.03 | 7.72 | 8.78 | 7.54 | 5.58 | 4.14 | 3.32 | 3.38 | 62.37 |
| Net Pond Evap | Inch | 1.41 | 2.62 | 4.32 | 5.01 | 4.28 | 5.83 | 5.02 | 6.58 | 4.42 | 3.85 | 3.04 | 2.36 | 48.74 |
| Boulder NW | Avg. Temp ° F | 25.63 | 31.39 | 46.49 | 48.33 | 56.1 | 67.86 | 73.29 | 70.82 | 63.63 | 51.54 | 44.71 | 42.4 | 51.85 |
| Ref date as of 12/31/2025 | Total Precip " | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 1.77 | 2.71 | 5.28 | 5.05 | 5.75 | 6.57 | 7.17 | 6.04 | 4.51 | 2.67 | 3.07 | 3.56 | 54.15 |
| Total Growing Degee Days from March 1 | 0 | 0 | 168 | 206 | 304 | 493 | 647 | 599 | 440 | 206 | 161 | 127 | 3351 | |
| Gross Pond Evap | Inch | 1.49 | 2.28 | 4.44 | 4.24 | 4.83 | 5.52 | 6.02 | 5.07 | 3.79 | 2.24 | 2.58 | 2.99 | 45.49 |
| Net Pond Evap | Inch | 1.49 | 2.28 | 4.44 | 4.24 | 4.83 | 5.52 | 6.02 | 5.07 | 3.79 | 2.24 | 2.58 | 2.99 | 45.49 |
| Boulder East | Avg. Temp ° F | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Ref date as of 5/2/2010 | Total Precip " | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Site Type: Turf | Total Alfalfa ETr " | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Total Growing Degee Days from March 1 | 0 | 0 | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 | |
| Gross Pond Evap | Inch | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Net Pond Evap | Inch | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Boulder Flatiron | Avg. Temp ° F | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Ref date as of 5/2/2010 | Total Precip " | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Site Type: Turf | Total Alfalfa ETr " | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Total Growing Degee Days from March 1 | 0 | 0 | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 | |
| Gross Pond Evap | Inch | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Net Pond Evap | Inch | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | #N/A | 0 |
| Boulder SW | Avg. Temp ° F | 28.17 | 32.79 | 47.65 | 49.25 | 56.91 | 68.62 | 74.12 | 71.73 | 64.15 | 53.86 | 45.84 | 45.94 | 53.25 |
| Ref date as of 12/31/2025 | Total Precip " | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 2.15 | 3.01 | 5.71 | 5.3 | 6.09 | 6.98 | 8.05 | 6.81 | 5.1 | 4.06 | 30.85 | 4.8 | 88.91 |
| Total Growing Degee Days from March 1 | 0 | 0 | 151 | 197 | 290 | 527 | 700 | 639 | 447 | 252 | 149 | 153 | 3505 | |
| Gross Pond Evap | Inch | 1.81 | 2.53 | 4.8 | 4.45 | 5.12 | 5.86 | 6.76 | 5.72 | 4.28 | 3.41 | 25.91 | 4.03 | 74.68 |
| Net Pond Evap | Inch | 1.81 | 2.53 | 4.8 | 4.45 | 5.12 | 5.86 | 6.76 | 5.72 | 4.28 | 3.41 | 25.91 | 4.03 | 74.68 |
| Greeley04 | Avg. Temp ° F | 21.9 | 27.4 | 44.49 | 48.08 | 56.79 | 67.88 | 72.95 | 70.05 | 63.05 | 50.96 | 41.55 | 35.49 | 50.05 |
| Ref date as of 12/31/2025 | Total Precip " | 0.08 | 0.1 | 1.12 | 0.52 | 2.96 | 1.57 | 1.54 | 0.69 | 1.97 | 0.12 | 0.11 | 0.06 | 10.84 |
| Site Type: Fully irrigated | Total Alfalfa ETr " | 1.73 | 2.75 | 6.01 | 6.6 | 7.48 | 8.53 | 9.53 | 7.98 | 5.99 | 4.5 | 3.09 | 2.9 | 67.09 |
| Total Growing Degee Days from March 1 | 0 | 0 | 202 | 233 | 329 | 510 | 656 | 592 | 457 | 279 | 168 | 115 | 3541 | |
| Gross Pond Evap | Inch | 1.45 | 2.31 | 5.05 | 5.54 | 6.28 | 7.17 | 8.01 | 6.7 | 5.03 | 3.78 | 2.6 | 2.44 | 56.36 |
| Net Pond Evap | Inch | 1.4 | 2.24 | 4.26 | 5.18 | 4.21 | 6.07 | 6.93 | 6.22 | 3.65 | 3.7 | 2.52 | 2.39 | 48.77 |