The official National Weather Service forecast for Deweyville — 30.2977°N, 93.7435°W, 12 miles from I-10. Forecasts here are written by NWS LCH, this county’s forecast office.
| Newton 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 | 5.1 | 4.1 | 4.3 | 4.5 | 5.3 | 5.1 | 4.8 | 4.5 | 4.8 | 4.7 | 4.9 | 5.3 | 57.4 |
1996–2025 normals for Newton County — the climate division Deweyville sits in. All-time county record high 107.7°F (2023-08-21); record low 6.0°F (1951-02-02). Source: NOAA / National Weather Service.