The official National Weather Service forecast for Chester — 30.9263°N, 94.5966°W, 57.4 miles from I-45. Forecasts here are written by NWS LCH, this county’s forecast office.
| Tyler County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 61 | 65 | 72 | 78 | 85 | 91 | 93 | 94 | 89 | 81 | 70 | 63 | 78 |
| Avg low °F | 39 | 43 | 49 | 56 | 64 | 70 | 72 | 72 | 67 | 56 | 48 | 41 | 56 |
| Precip in | 4.8 | 3.8 | 4.2 | 4.2 | 5.7 | 5.0 | 4.6 | 4.4 | 4.6 | 5.0 | 4.9 | 5.1 | 56.3 |
1996–2025 normals for Tyler County — the climate division Chester sits in. All-time county record high 107.5°F (2000-09-05); record low 6.1°F (1951-02-02). Source: NOAA / National Weather Service.