The official National Weather Service forecast for Caledonia — 40.6365°N, 82.9691°W, 16.2 miles from I-71.
| Marion County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 35 | 39 | 49 | 62 | 73 | 81 | 84 | 82 | 77 | 65 | 51 | 40 | 62 |
| Avg low °F | 20 | 22 | 30 | 40 | 50 | 60 | 63 | 61 | 54 | 43 | 33 | 25 | 42 |
| Precip in | 2.4 | 2.2 | 2.8 | 3.6 | 4.2 | 4.2 | 3.7 | 3.4 | 3.2 | 2.8 | 2.5 | 2.8 | 37.8 |
1996–2025 normals for Marion County — the climate division Caledonia sits in. All-time county record high 102.1°F (1988-06-26); record low -23.1°F (1994-01-19). Source: NOAA / National Weather Service.