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Osco, IL Climate
1991 to 2020 normals at Geneseo, 10 mi from the center of Osco, elevation 639 ft.
Average weather by month
Select a month for daily normals and last year's weather
| Month | Range | High | Low | Precip. | Snow |
|---|---|---|---|---|---|
| January | 31° | 15° | 1.64 in | 9.8 in | |
| February | 36° | 19° | 1.81 in | 6.1 in | |
| March | 49° | 29° | 2.70 in | 2.8 in | |
| April | 62° | 40° | 3.96 in | 0.7 in | |
| May | 74° | 52° | 4.87 in | 0.0 in | |
| June | 83° | 62° | 4.42 in | 0.0 in | |
| July | 86° | 65° | 4.13 in | 0.0 in | |
| August | 83° | 63° | 4.10 in | 0.0 in | |
| September | 77° | 55° | 3.57 in | 0.0 in | |
| October | 64° | 43° | 3.21 in | 0.1 in | |
| November | 49° | 31° | 2.56 in | 1.6 in | |
| December | 36° | 21° | 2.12 in | 7.3 in | |
| Year | 61° | 39.09 in | 28.4 in |
Frequently asked questions
- What is the hottest month in Osco, IL?
- July is the warmest month, with a normal high of 86°F at Geneseo.
- What is the coldest month in Osco, IL?
- January is the coldest month, with a normal low of 15°F.
- What is the wettest month in Osco, IL?
- May has the most precipitation on average, about 4.87 inches.