The official National Weather Service forecast for Beaverton — 33.9312°N, 88.0203°W, 10 miles from I-22. Forecasts here are written by NWS BMX, this county’s forecast office.
| Lamar County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 54 | 59 | 67 | 75 | 82 | 89 | 91 | 91 | 86 | 76 | 65 | 57 | 74 |
| Avg low °F | 32 | 36 | 43 | 49 | 59 | 67 | 70 | 69 | 63 | 51 | 41 | 35 | 51 |
| Precip in | 5.6 | 5.7 | 5.5 | 5.8 | 4.8 | 4.6 | 4.9 | 4.0 | 3.5 | 3.5 | 4.2 | 5.7 | 57.8 |
1996–2025 normals for Lamar County — the climate division Beaverton sits in. All-time county record high 107.5°F (1952-07-29); record low -7.8°F (1966-01-30). Source: NOAA / National Weather Service.