The official National Weather Service forecast for Osceola — 41.0339°N, 93.7655°W, population 5,283, 2.9 miles from I-35.
| Clarke County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 32 | 37 | 50 | 62 | 72 | 82 | 86 | 84 | 78 | 65 | 50 | 37 | 61 |
| Avg low °F | 14 | 17 | 29 | 39 | 50 | 61 | 65 | 62 | 54 | 41 | 30 | 19 | 40 |
| Precip in | 1.0 | 1.2 | 2.1 | 3.6 | 5.3 | 5.0 | 3.9 | 4.2 | 3.3 | 3.1 | 1.9 | 1.4 | 36.0 |
1996–2025 normals for Clarke County — the climate division Osceola sits in. All-time county record high 104.3°F (1983-08-17); record low -29.2°F (1996-02-03). Source: NOAA / National Weather Service.