The official National Weather Service forecast for Groveton — 31.0549°N, 95.1258°W, 35.1 miles from I-45. Forecasts here are written by NWS HGX, this county’s forecast office.
| Trinity County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 60 | 64 | 72 | 78 | 85 | 91 | 94 | 95 | 90 | 81 | 70 | 62 | 78 |
| Avg low °F | 38 | 42 | 49 | 56 | 64 | 71 | 73 | 73 | 67 | 57 | 48 | 41 | 57 |
| Precip in | 4.2 | 3.5 | 3.8 | 4.1 | 5.3 | 4.5 | 3.7 | 3.3 | 3.6 | 4.3 | 4.5 | 4.3 | 49.1 |
1996–2025 normals for Trinity County — the climate division Groveton sits in. All-time county record high 109.7°F (2000-09-05); record low 3.7°F (1989-12-23). Source: NOAA / National Weather Service.