The official National Weather Service forecast for Osceola — 41.1797°N, 97.5476°W, 26.5 miles from I-80.
| Polk County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 34 | 38 | 51 | 63 | 73 | 83 | 86 | 84 | 79 | 65 | 51 | 38 | 62 |
| Avg low °F | 14 | 17 | 28 | 38 | 49 | 61 | 65 | 63 | 54 | 41 | 28 | 18 | 40 |
| Precip in | 0.6 | 0.7 | 1.6 | 2.7 | 4.8 | 4.3 | 3.0 | 3.6 | 2.3 | 2.1 | 1.1 | 0.9 | 27.7 |
1996–2025 normals for Polk County — the climate division Osceola sits in. All-time county record high 107.2°F (1954-07-13); record low -30.1°F (2021-02-16). Source: NOAA / National Weather Service.