The official National Weather Service forecast for Seymour — 37.1464°N, 92.7688°W, 15.9 miles from I-44. Forecasts here are written by NWS SGF, this county’s forecast office.
| Webster County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 42 | 47 | 58 | 67 | 75 | 83 | 88 | 87 | 80 | 69 | 57 | 46 | 67 |
| Avg low °F | 23 | 26 | 35 | 44 | 53 | 62 | 66 | 64 | 56 | 45 | 35 | 27 | 45 |
| Precip in | 2.5 | 2.6 | 4.3 | 4.8 | 5.8 | 4.4 | 4.4 | 3.9 | 3.7 | 3.7 | 3.3 | 2.6 | 46.0 |
1996–2025 normals for Webster County — the climate division Seymour sits in. All-time county record high 108.8°F (1954-07-14); record low -18.7°F (1985-01-20). Source: NOAA / National Weather Service.