Iowa City, IA weather and climate
Johnson County, IA · population 75,264 · about 666 ft elevation
Everything below is a 30 year average for 1991-2020, computed from daily climate history at Iowa City's own coordinates.
The year at a glance
- Sunny days
- 195
- clear or partly cloudy, per year
- Precipitation
- 39 in
- per year
- Wet days
- 118
- rain or snow per year
- Snowfall
- 28 in
- per year
- Hot days
- 19
- above 90 °F
- Freezing nights
- 133
- at or below 32 °F
- Humidity
- 71%
- average relative
- Average temperature
- 51 °F
- year round
Monthly temperatures
Average daily high and low for each month, in °F.
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daily high | 31 | 35 | 49 | 62 | 73 | 82 | 86 | 84 | 77 | 64 | 49 | 36 |
| Daily low | 14 | 18 | 29 | 40 | 51 | 62 | 65 | 63 | 54 | 42 | 30 | 20 |
Monthly precipitation
Total rain plus melted snow for each month, in inches.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Iowa City | 1.5 | 1.8 | 2.7 | 4.4 | 4.8 | 5.1 | 3.7 | 3.8 | 3.9 | 2.9 | 2.3 | 1.9 |
Monthly sunny days
Days each month with clear or partly cloudy skies.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Iowa City | 13 | 13 | 16 | 14 | 15 | 16 | 21 | 21 | 21 | 18 | 15 | 13 |
Compare Iowa City with another city
Nearby cities and popular picks. Any two cities can be compared from the home page.
- Iowa City vs Coralville, IA
- Iowa City vs Tiffin, IA
- Iowa City vs North Liberty, IA
- Iowa City vs Cedar Rapids, IA
- Iowa City vs Washington, IA
- Iowa City vs Marion, IA
- Iowa City vs New York, NY
- Iowa City vs Los Angeles, CA
- Iowa City vs Chicago, IL
- Iowa City vs Houston, TX
- Iowa City vs Phoenix, AZ
- Iowa City vs Philadelphia, PA
About this data
Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).
Citing this page
Writing about Iowa City's climate in a report or paper? Cite this page directly. The reference period is part of the citation, so it stays accurate even as individual numbers are refined; add an access date in whatever citation style you use.
VSWeather. Iowa City, IA weather and climate: 1991-2020 climate normals. https://vsweather.com/weather/iowa-city-ia/. Computed from Open-Meteo historical reanalysis, station-calibrated against NOAA NCEI climate normals.
BibTeX entry
@misc{vsweather_iowa_city_ia,
author = {{VSWeather}},
title = {Iowa City, IA weather and climate: 1991-2020 climate normals},
howpublished = {\url{https://vsweather.com/weather/iowa-city-ia/}},
note = {Computed from Open-Meteo historical reanalysis, station-calibrated against NOAA NCEI climate normals}
}How to cite VSWeather explains the sources and verification behind these numbers.