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Onslow, IA Climate
1991 to 2020 normals at Cascade, 13 mi from the center of Onslow, elevation 814 ft.
Average weather by month
Select a month for daily normals and last year's weather
| Month | Range | High | Low | Precip. | Snow |
|---|---|---|---|---|---|
| January | 27° | 11° | 1.26 in | 8.3 in | |
| February | 32° | 15° | 1.45 in | 8.8 in | |
| March | 45° | 26° | 2.15 in | 4.2 in | |
| April | 59° | 37° | 3.97 in | 0.9 in | |
| May | 70° | 49° | 4.21 in | 0.0 in | |
| June | 80° | 60° | 5.96 in | 0.0 in | |
| July | 83° | 63° | 4.53 in | 0.0 in | |
| August | 81° | 60° | 4.65 in | 0.0 in | |
| September | 75° | 51° | 3.79 in | 0.0 in | |
| October | 62° | 39° | 3.26 in | 0.2 in | |
| November | 46° | 28° | 2.33 in | 1.8 in | |
| December | 33° | 18° | 1.75 in | 6.9 in | |
| Year | 58° | 39.31 in | 31.1 in |
Frequently asked questions
- What is the hottest month in Onslow, IA?
- July is the warmest month, with a normal high of 83°F at Cascade.
- What is the coldest month in Onslow, IA?
- January is the coldest month, with a normal low of 11°F.
- What is the wettest month in Onslow, IA?
- June has the most precipitation on average, about 5.96 inches.