The official National Weather Service forecast for Lynnville — 35.3767°N, 87.0061°W, 8.5 miles from I-65.
| Giles County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 49 | 54 | 63 | 72 | 79 | 86 | 89 | 89 | 83 | 73 | 62 | 53 | 71 |
| Avg low °F | 29 | 32 | 39 | 46 | 55 | 64 | 67 | 66 | 59 | 47 | 37 | 32 | 48 |
| Precip in | 5.4 | 5.5 | 5.7 | 5.2 | 4.9 | 4.5 | 4.7 | 4.1 | 3.9 | 3.7 | 3.9 | 5.9 | 57.4 |
1996–2025 normals for Giles County — the climate division Lynnville sits in. All-time county record high 106.2°F (2012-06-30); record low -17.4°F (1985-01-21). Source: NOAA / National Weather Service.