The official National Weather Service forecast for Lewisburg — 35.4492°N, 86.7889°W, population 11,934, 6.2 miles from I-65.
| Marshall County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 49 | 54 | 63 | 72 | 79 | 87 | 89 | 89 | 84 | 73 | 62 | 52 | 71 |
| Avg low °F | 29 | 32 | 39 | 46 | 55 | 64 | 67 | 65 | 59 | 47 | 37 | 32 | 48 |
| Precip in | 5.1 | 5.4 | 5.6 | 5.0 | 4.8 | 4.4 | 4.6 | 4.2 | 4.1 | 3.5 | 3.7 | 5.4 | 55.8 |
1996–2025 normals for Marshall County — the climate division Lewisburg sits in. All-time county record high 107.6°F (2012-06-30); record low -17.9°F (1985-01-21). Source: NOAA / National Weather Service.