The official National Weather Service forecast for Decaturville — 35.5842°N, 88.1195°W, 16.6 miles from I-40.
| Decatur County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 50 | 54 | 64 | 73 | 80 | 87 | 90 | 89 | 84 | 74 | 62 | 53 | 72 |
| Avg low °F | 29 | 33 | 40 | 47 | 57 | 65 | 69 | 67 | 60 | 48 | 38 | 32 | 49 |
| Precip in | 5.0 | 5.2 | 5.7 | 5.3 | 5.0 | 4.6 | 4.2 | 3.7 | 3.8 | 3.5 | 4.1 | 5.0 | 55.1 |
1996–2025 normals for Decatur County — the climate division Decaturville sits in. All-time county record high 107.9°F (1952-07-28); record low -18.8°F (1951-02-02). Source: NOAA / National Weather Service.