The official National Weather Service forecast for Henryetta — 35.4398°N, 95.9819°W, population 6,207, 6 miles from I-40. Forecasts here are written by NWS TSA, this county’s forecast office.
| Okmulgee County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 50 | 54 | 64 | 72 | 80 | 88 | 93 | 92 | 86 | 74 | 63 | 53 | 72 |
| Avg low °F | 28 | 32 | 41 | 49 | 59 | 67 | 71 | 70 | 62 | 50 | 40 | 31 | 50 |
| Precip in | 2.0 | 2.1 | 3.4 | 4.6 | 5.8 | 4.8 | 3.4 | 3.6 | 3.5 | 4.0 | 3.0 | 2.4 | 42.6 |
1996–2025 normals for Okmulgee County — the climate division Henryetta sits in. All-time county record high 111.0°F (1954-07-14); record low -13.2°F (2021-02-17). Source: NOAA / National Weather Service.