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Delavan, IL Climate
1991 to 2020 normals at Mason City 4se, 15 mi from the center of Delavan, elevation 600 ft.
Average weather by month
Select a month for daily normals and last year's weather
| Month | Range | High | Low | Precip. | Snow |
|---|---|---|---|---|---|
| January | 33° | 16° | 2.34 in | 5.5 in | |
| February | 38° | 19° | 1.96 in | 2.8 in | |
| March | 51° | 30° | 2.49 in | 1.7 in | |
| April | 64° | 41° | 3.73 in | 0.0 in | |
| May | 74° | 53° | 4.47 in | 0.0 in | |
| June | 82° | 62° | 4.20 in | 0.0 in | |
| July | 85° | 65° | 5.14 in | 0.0 in | |
| August | 84° | 62° | 3.57 in | 0.0 in | |
| September | 79° | 54° | 3.55 in | 0.0 in | |
| October | 66° | 43° | 3.33 in | 0.0 in | |
| November | 51° | 31° | 2.78 in | 0.3 in | |
| December | 38° | 22° | 1.70 in | 2.6 in | |
| Year | 62° | 39.26 in | 12.9 in |
Frequently asked questions
- What is the hottest month in Delavan, IL?
- July is the warmest month, with a normal high of 85°F at Mason City 4se.
- What is the coldest month in Delavan, IL?
- January is the coldest month, with a normal low of 16°F.
- What is the wettest month in Delavan, IL?
- July has the most precipitation on average, about 5.14 inches.