Iowa City, IA Weather & Climate Normals
Iowa City's real weather, in one number
Iowa City, IA scores 42/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 4 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Iowa City's hottest and coldest months
Iowa City's hottest month is Jul, averaging 76°F; its coldest is Jan, averaging 23°F, a 53°F swing across the year, one of the widest gaps in this dataset.
Iowa City's weather across the year
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| Jan | 31°F | 15°F | 1.04in |
| Feb | 36°F | 19°F | 1.21in |
| Mar | 50°F | 30°F | 2.21in |
| Apr | 63°F | 40°F | 3.76in |
| May | 73°F | 52°F | 4.48in |
| Jun | 83°F | 62°F | 5.29in |
| Jul | 86°F | 66°F | 3.91in |
| Aug | 84°F | 63°F | 3.94in |
| Sep | 78°F | 54°F | 3.24in |
| Oct | 64°F | 42°F | 2.98in |
| Nov | 49°F | 30°F | 2.17in |
| Dec | 36°F | 20°F | 1.45in |
May, Jun, Aug, and Sep are the best time to see Iowa City at its mildest; the rest of the year, plan around Jul's heat and Jan's cold.
Rain and snow in Iowa City
Over a typical year, Iowa City sees about 35.68in of precipitation a year across roughly 115 days with measurable rain or snow. That station has no snowfall reading, so none is shown rather than assumed.
Where Iowa City ranks
Iowa City ranks 4163 of 4876 US cities in this dataset for comfort score, and 45 of 85 within IA. About 76,710 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Iowa City Muni Ap, IA US, 1.7 miles from Iowa City, not a prediction for any specific day.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is