The official National Weather Service forecast for Fort Gibson — 35.7976°N, 95.2505°W, 23.2 miles from I-40. Forecasts here are written by NWS TSA, this county’s forecast office.
| Muskogee County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 50 | 55 | 64 | 73 | 80 | 88 | 93 | 93 | 86 | 75 | 63 | 53 | 73 |
| Avg low °F | 28 | 32 | 41 | 49 | 59 | 67 | 71 | 70 | 62 | 50 | 41 | 32 | 50 |
| Precip in | 2.3 | 2.3 | 3.8 | 5.1 | 5.9 | 4.4 | 3.6 | 3.7 | 3.8 | 4.3 | 3.3 | 2.8 | 45.3 |
1996–2025 normals for Muskogee County — the climate division Fort Gibson sits in. All-time county record high 111.5°F (2011-08-03); record low -11.3°F (2021-02-17). Source: NOAA / National Weather Service.