Climate averages 1991–2020
Greeley weather
in August.
A hot, fairly dry month: the 2nd warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Greeley: daytime highs average 30.5°C and nights cool to about 16.0°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 31 mm of rain on roughly 7 days, which makes August a fairly dry month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 47 min on an average August day.
The nearest other city in this atlas is Loveland (31 km away). In August its highs average 28.2°C, 2.3°C cooler than Greeley, with 37 mm of rain.
Among the 498 cities listed in the United States, Greeley ranks joint 197th of 498 for the warmest August highs and 156th of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Greeley is 0.6°C warmer than that mean.
From August to September, average highs fall by 4.5°C to 26.0°C, and monthly rainfall falls from 31 mm to 27 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Greeley climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.4°C-7.4°C | -7.4°C | 11 | 2.9 | 9.610 h |
| February | 7.4°C-6.3°C | -6.3°C | 11 | 3.4 | 10.611 h |
| March | 12.9°C-2.3°C | -2.3°C | 29 | 5.4 | 11.912 h |
| April | 16.9°C2.2°C | 2.2°C | 49 | 8.5 | 13.313 h |
| May | 22.0°C7.7°C | 7.7°C | 67 | 9.7 | 14.414 h |
| June | 28.3°C13.3°C | 13.3°C | 40 | 7.3 | 15.015 h |
| July | 31.9°C17.1°C | 17.1°C | 36 | 7.4 | 14.815 h |
| August, selected | 30.5°C16.0°C | 16.0°C | 31 | 6.6 | 13.814 h |
| September | 26.0°C11.3°C | 11.3°C | 27 | 4.6 | 12.513 h |
| October | 17.9°C3.9°C | 3.9°C | 30 | 5.1 | 11.211 h |
| November | 10.4°C-2.7°C | -2.7°C | 16 | 3.8 | 10.010 h |
| December | 4.9°C-6.8°C | -6.8°C | 11 | 2.9 | 9.39 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Loveland in AugustUnited States · 31 kmHigh 28.2°C · Low 14.0°C · 37 mm rain
- Fort Collins in AugustUnited States · 36 kmHigh 28.2°C · Low 14.0°C · 37 mm rain
- Longmont in AugustUnited States · 44 kmHigh 28.3°C · Low 14.3°C · 39 mm rain
- Thornton in AugustUnited States · 66 kmHigh 28.0°C · Low 13.8°C · 39 mm rain
- Boulder in AugustUnited States · 66 kmHigh 27.5°C · Low 13.7°C · 71 mm rain
- Westminster (Colorado), United States in AugustUnited States · 71 kmHigh 28.1°C · Low 13.8°C · 39 mm rain
- Arvada in AugustUnited States · 76 kmHigh 28.0°C · Low 13.7°C · 39 mm rain
- Aurora (Colorado), United States in AugustUnited States · 78 kmHigh 29.2°C · Low 15.2°C · 34 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Greeley) is explained once on the Greeley year overview and on the Sources, method and limits page.