The official National Weather Service forecast for South Fulton — 36.5009°N, 88.8753°W, 40.4 miles from I-55.
| Obion County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 45 | 50 | 60 | 70 | 79 | 87 | 89 | 88 | 83 | 72 | 59 | 49 | 69 |
| Avg low °F | 28 | 32 | 40 | 48 | 58 | 66 | 70 | 67 | 60 | 48 | 39 | 32 | 49 |
| Precip in | 4.4 | 4.7 | 5.4 | 5.6 | 5.7 | 4.1 | 4.4 | 3.6 | 3.5 | 3.7 | 4.2 | 5.0 | 54.3 |
1996–2025 normals for Obion County — the climate division South Fulton sits in. All-time county record high 104.4°F (1952-06-30); record low -12.7°F (1951-02-02). Source: NOAA / National Weather Service.