The official National Weather Service forecast for Chariton — 41.0139°N, 93.3066°W, 25.2 miles from I-35.
| Lucas 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 | 40 | 50 | 61 | 65 | 62 | 54 | 42 | 30 | 19 | 40 |
| Precip in | 1.1 | 1.3 | 2.1 | 3.6 | 5.2 | 5.1 | 4.1 | 4.2 | 3.2 | 3.1 | 1.9 | 1.5 | 36.4 |
1996–2025 normals for Lucas County — the climate division Chariton sits in. All-time county record high 104.5°F (2012-07-26); record low -28.1°F (1996-02-03). Source: NOAA / National Weather Service.