DeWitt, IA Weather & Climate Normals
What a normal year in DeWitt actually looks like
On the 30-year record NOAA keeps for DeWitt, IA, the comfort score comes out to 44/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 5 months a year land in the 55–75°F range this site treats as mild.
How much DeWitt's weather actually swings
Average temperatures in DeWitt run from 22°F in Jan up to 74°F in Jul, a 52.5°F seasonal swing, one of the widest gaps in this dataset.
DeWitt, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 29°F | 14°F | 1.45in | 9.2in |
| Feb | 34°F | 18°F | 1.68in | 7.5in |
| Mar | 48°F | 29°F | 2.32in | 3.9in |
| Apr | 62°F | 40°F | 3.4in | 0.8in |
| May | 73°F | 51°F | 4.39in | 0in |
| Jun | 81°F | 61°F | 4.74in | 0in |
| Jul | 84°F | 65°F | 3.89in | 0in |
| Aug | 82°F | 63°F | 4.2in | 0in |
| Sep | 76°F | 55°F | 3.69in | 0in |
| Oct | 63°F | 43°F | 2.64in | 0.3in |
| Nov | 48°F | 31°F | 2.19in | 2.3in |
| Dec | 35°F | 21°F | 1.86in | 7.9in |
If you're timing a visit, May, Jun, Jul, Aug, and Sep are DeWitt's mildest stretch; if you're moving there, you should plan around Jan's cold instead.
How wet DeWitt actually gets
Over a typical year, DeWitt sees about 36.45in of precipitation a year across roughly 118 days with measurable rain or snow, with 31.9in of snow a year.
DeWitt against the rest of the country
Out of 4876 cities scored here, DeWitt comes in at 3929; within IA alone it ranks 28 of 85. Population is about 5,620.
Checking the actual forecast
These figures come from Clinton #1, IA US, the NOAA station 14.6 miles from DeWitt, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why this uses the nearest NOAA station · How the comfort score is calculated