The official National Weather Service forecast for Allardt — 36.3809°N, 84.8844°W, 26.7 miles from I-40.
| Fentress County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 44 | 49 | 58 | 67 | 75 | 82 | 84 | 84 | 79 | 69 | 58 | 48 | 66 |
| Avg low °F | 26 | 30 | 36 | 44 | 53 | 60 | 64 | 63 | 56 | 45 | 35 | 30 | 45 |
| Precip in | 4.9 | 5.2 | 5.3 | 5.2 | 5.0 | 5.0 | 5.6 | 4.2 | 4.1 | 3.1 | 3.8 | 5.5 | 56.9 |
1996–2025 normals for Fentress County — the climate division Allardt sits in. All-time county record high 101.6°F (2012-06-30); record low -23.0°F (1985-01-21). Source: NOAA / National Weather Service.