The official National Weather Service forecast for Jasper — 35.0742°N, 85.6261°W, 1.8 miles from I-24.
| Marion County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 48 | 53 | 61 | 70 | 77 | 84 | 86 | 86 | 81 | 71 | 60 | 51 | 69 |
| Avg low °F | 29 | 33 | 40 | 47 | 56 | 63 | 67 | 66 | 60 | 49 | 39 | 33 | 48 |
| Precip in | 5.8 | 5.7 | 5.8 | 5.7 | 5.1 | 4.9 | 5.0 | 4.4 | 4.3 | 3.8 | 4.6 | 6.1 | 61.2 |
1996–2025 normals for Marion County — the climate division Jasper sits in. All-time county record high 101.6°F (1980-07-17); record low -14.9°F (1985-01-21). Source: NOAA / National Weather Service.