The official National Weather Service forecast for Decherd — 35.2098°N, 86.0794°W, 11.7 miles from I-24.
| Franklin County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 49 | 53 | 62 | 71 | 78 | 85 | 87 | 87 | 82 | 72 | 61 | 52 | 70 |
| Avg low °F | 29 | 33 | 39 | 46 | 56 | 63 | 67 | 65 | 59 | 48 | 38 | 33 | 48 |
| Precip in | 5.6 | 5.6 | 5.7 | 5.4 | 5.2 | 5.2 | 5.1 | 4.6 | 4.3 | 3.4 | 4.4 | 5.9 | 60.4 |
1996–2025 normals for Franklin County — the climate division Decherd sits in. All-time county record high 103.9°F (2012-06-30); record low -16.1°F (1985-01-21). Source: NOAA / National Weather Service.