Climate averages 1991–2020
Omaha weather
by month.
See how the year changes. July has the highest average daily maximum; January has the lowest average monthly precipitation.
Long-term climate patterns, not a forecast for a particular trip.
Across the year Omaha averages a daytime high of 15.9°C and a nighttime low of 6.1°C, with about 894 mm of rain on roughly 98 days. July is the warmest month (average high 29.6°C) and January the coolest (0.0°C). May is the wettest month with 139 mm; January is the driest with 26 mm.
The annual picture
A year in Omaha
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 | 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
Nearby cities
- LincolnUnited States · 79 kmHigh 16.7°C · Low 6.7°C · 816 mm rain a year
- Sioux CityUnited States · 143 kmHigh 14.5°C · Low 4.7°C · 834 mm precipitation a year
- Saint JosephUnited States · 190 kmHigh 17.1°C · Low 7.7°C · 988 mm rain a year
- Des MoinesUnited States · 198 kmHigh 15.0°C · Low 5.7°C · 945 mm precipitation a year
- TopekaUnited States · 247 kmHigh 18.1°C · Low 8.5°C · 970 mm rain a year
- Lawrence (Kansas), United StatesUnited States · 261 kmHigh 18.0°C · Low 8.7°C · 1,007 mm rain a year
- Sioux FallsUnited States · 262 kmHigh 13.1°C · Low 3.4°C · 803 mm precipitation a year
- Kansas CityUnited States · 266 kmHigh 17.8°C · Low 8.4°C · 1,029 mm rain a year
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 limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC-6, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 41.30°, -95.90° (6 km from the city centre), adjusted up by 0.1°C for the difference between the city's elevation (315 m) and the cell's (330 m). Rain comes from the 0.25° cell at 41.25°, -96.00°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.