Climate averages 1991–2020
Sioux City weather
in April.
A mild, wet month: the 7th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Sioux City: daytime highs average 15.0°C and nights cool to about 3.9°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 101 mm of rain on roughly 11 days, which makes April a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 21 min on an average April day.
The nearest other city in this atlas is Sioux Falls (119 km away). In April its highs average 13.6°C, 1.4°C cooler than Sioux City, with 91 mm of rain.
Among the 498 cities listed in the United States, Sioux City ranks joint 361st of 498 for the warmest April highs and joint 369th of 498 for the driest April (rainfall, lowest first). The mean April high of those 498 cities is 19.4°C; Sioux City is 4.4°C cooler than that mean.
From April to May, average highs rise by 6.0°C to 21.0°C, and monthly rainfall rises from 101 mm to 126 mm.
The annual picture
April 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, selected | 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 | 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
April in nearby cities
- Sioux Falls in AprilUnited States · 119 kmHigh 13.6°C · Low 2.6°C · 91 mm rain
- Omaha in AprilUnited States · 143 kmHigh 16.3°C · Low 5.5°C · 104 mm rain
- Lincoln in AprilUnited States · 190 kmHigh 16.9°C · Low 5.8°C · 92 mm rain
- Des Moines in AprilUnited States · 251 kmHigh 15.6°C · Low 5.1°C · 107 mm rain
- Saint Joseph in AprilUnited States · 330 kmHigh 17.3°C · Low 7.0°C · 115 mm rain
- Rochester (Minnesota), United States in AprilUnited States · 360 kmHigh 12.6°C · Low 2.7°C · 92 mm rain
- Bloomington (Minnesota), United States in AprilUnited States · 360 kmHigh 12.7°C · Low 2.9°C · 81 mm rain
- Plymouth, United States in AprilUnited States · 366 kmHigh 12.3°C · Low 2.3°C · 81 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.