Climate averages 1991–2020
Omaha weather
in August.
A hot, wet month: the 2nd warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Omaha: daytime highs average 28.6°C and nights cool to about 19.3°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 90 mm of rain on roughly 9 days, which makes August a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 50 min on an average August day.
The nearest other city in this atlas is Lincoln (79 km away). In August its highs average 29.5°C, 0.8°C warmer than Omaha, with 80 mm of rain.
Among the 498 cities listed in the United States, Omaha ranks joint 299th of 498 for the warmest August highs and joint 322nd of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Omaha is 1.3°C cooler than that mean.
From August to September, average highs fall by 3.8°C to 24.8°C, and monthly rainfall falls from 90 mm to 77 mm.
The annual picture
August in context
Monthly precipitation
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
Omaha climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 0.0°C-9.2°C | -9.2°C | 26 | 4.8 | 9.610 h |
| February | 2.7°C-7.3°C | -7.3°C | 32 | 5.7 | 10.611 h |
| March | 9.9°C-1.0°C | -1.0°C | 60 | 7.8 | 11.912 h |
| April | 16.3°C5.5°C | 5.5°C | 104 | 11.0 | 13.313 h |
| May | 22.0°C11.9°C | 11.9°C | 139 | 12.7 | 14.514 h |
| June | 27.3°C17.6°C | 17.6°C | 131 | 11.4 | 15.115 h |
| July | 29.6°C20.3°C | 20.3°C | 88 | 9.3 | 14.815 h |
| August, selected | 28.6°C19.3°C | 19.3°C | 90 | 9.1 | 13.814 h |
| September | 24.8°C14.8°C | 14.8°C | 77 | 8.1 | 12.513 h |
| October | 17.4°C7.8°C | 7.8°C | 68 | 7.5 | 11.111 h |
| November | 9.2°C0.2°C | 0.2°C | 44 | 5.2 | 9.910 h |
| December | 2.2°C-6.3°C | -6.3°C | 36 | 5.1 | 9.39 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet 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
- Lincoln in AugustUnited States · 79 kmHigh 29.5°C · Low 19.7°C · 80 mm rain
- Sioux City in AugustUnited States · 143 kmHigh 27.5°C · Low 18.1°C · 98 mm rain
- Saint Joseph in AugustUnited States · 190 kmHigh 29.4°C · Low 20.4°C · 91 mm rain
- Des Moines in AugustUnited States · 198 kmHigh 27.8°C · Low 18.6°C · 94 mm rain
- Topeka in AugustUnited States · 247 kmHigh 30.4°C · Low 20.9°C · 102 mm rain
- Lawrence (Kansas), United States in AugustUnited States · 261 kmHigh 30.3°C · Low 21.2°C · 100 mm rain
- Sioux Falls in AugustUnited States · 262 kmHigh 26.6°C · Low 17.1°C · 85 mm rain
- Kansas City in AugustUnited States · 266 kmHigh 30.2°C · Low 20.8°C · 94 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 Omaha) is explained once on the Omaha year overview and on the Sources, method and limits page.