Climate averages 1991–2020
Sioux City weather
in July.
A hot, moderately wet month: the warmest and the joint 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Sioux City: daytime highs average 28.7°C and nights cool to about 19.3°C. By daytime temperature it is the warmest month of the year.
Expect about 75 mm of rain on roughly 9 days, which makes July a moderately wet month (the joint 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 58 min on an average July day.
The nearest other city in this atlas is Sioux Falls (119 km away). In July its highs average 27.7°C, 1.0°C cooler than Sioux City, with 84 mm of rain.
Among the 498 cities listed in the United States, Sioux City ranks joint 323rd of 498 for the warmest July highs and joint 235th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Sioux City is 1.6°C cooler than that mean.
From July to August, average highs fall by 1.2°C to 27.5°C, and monthly rainfall rises from 75 mm to 98 mm.
The annual picture
July 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
Sioux City climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -1.9°C-11.2°C | -11.2°C | 23 | 4.7 | 9.49 h |
| February | 1.1°C-9.0°C | -9.0°C | 27 | 5.1 | 10.511 h |
| March | 8.2°C-2.7°C | -2.7°C | 55 | 7.0 | 11.912 h |
| April | 15.0°C3.9°C | 3.9°C | 101 | 10.6 | 13.313 h |
| May | 21.0°C10.6°C | 10.6°C | 126 | 12.6 | 14.615 h |
| June | 26.3°C16.5°C | 16.5°C | 123 | 11.8 | 15.215 h |
| July, selected | 28.7°C19.3°C | 19.3°C | 75 | 8.8 | 15.015 h |
| August | 27.5°C18.1°C | 18.1°C | 98 | 9.4 | 13.914 h |
| September | 23.8°C13.8°C | 13.8°C | 75 | 7.6 | 12.513 h |
| October | 16.1°C6.5°C | 6.5°C | 61 | 7.3 | 11.111 h |
| November | 7.6°C-1.3°C | -1.3°C | 40 | 5.4 | 9.810 h |
| December | 0.3°C-8.0°C | -8.0°C | 30 | 5.2 | 9.19 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
July in nearby cities
- Sioux Falls in JulyUnited States · 119 kmHigh 27.7°C · Low 18.2°C · 84 mm rain
- Omaha in JulyUnited States · 143 kmHigh 29.6°C · Low 20.3°C · 88 mm rain
- Lincoln in JulyUnited States · 190 kmHigh 30.7°C · Low 20.9°C · 88 mm rain
- Des Moines in JulyUnited States · 251 kmHigh 28.7°C · Low 19.7°C · 91 mm rain
- Saint Joseph in JulyUnited States · 330 kmHigh 30.3°C · Low 21.3°C · 112 mm rain
- Rochester (Minnesota), United States in JulyUnited States · 360 kmHigh 26.5°C · Low 18.0°C · 97 mm rain
- Bloomington (Minnesota), United States in JulyUnited States · 360 kmHigh 27.4°C · Low 19.0°C · 91 mm rain
- Plymouth, United States in JulyUnited States · 366 kmHigh 27.1°C · Low 18.5°C · 90 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 Sioux City) is explained once on the Sioux City year overview and on the Sources, method and limits page.