The official National Weather Service forecast for Brighton — 39.9853°N, 104.8205°W, 5.7 miles from I-76. Forecasts here are written by NWS BOU, this county’s forecast office.
| Adams County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 43 | 45 | 55 | 62 | 71 | 84 | 90 | 88 | 80 | 66 | 54 | 44 | 65 |
| Avg low °F | 15 | 17 | 25 | 32 | 42 | 52 | 59 | 56 | 48 | 35 | 24 | 16 | 35 |
| Precip in | 0.4 | 0.6 | 1.1 | 1.7 | 2.7 | 2.0 | 2.0 | 1.9 | 1.3 | 0.9 | 0.6 | 0.4 | 15.6 |
1996–2025 normals for Adams County — the climate division Brighton sits in. All-time county record high 107.5°F (2012-06-27); record low -27.1°F (1951-02-01). Source: NOAA / National Weather Service.