The official National Weather Service forecast for Great Barrington — 42.1959°N, 73.3621°W, 7.7 miles from I-90.
| Berkshire County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 31 | 35 | 43 | 56 | 67 | 75 | 80 | 78 | 71 | 59 | 47 | 36 | 56 |
| Avg low °F | 14 | 16 | 23 | 33 | 44 | 53 | 58 | 56 | 49 | 39 | 29 | 20 | 36 |
| Precip in | 3.5 | 2.8 | 3.5 | 3.8 | 4.1 | 4.7 | 4.7 | 4.3 | 4.9 | 4.6 | 3.3 | 4.1 | 48.3 |
1996–2025 normals for Berkshire County — the climate division Great Barrington sits in. All-time county record high 94.2°F (1953-09-03); record low -22.3°F (1994-01-27). Source: NOAA / National Weather Service.