The official National Weather Service forecast for Norwich — 43.7154°N, 72.3079°W, 0.9 miles from I-91.
| Windsor County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 29 | 32 | 41 | 54 | 67 | 75 | 80 | 78 | 71 | 58 | 45 | 34 | 55 |
| Avg low °F | 10 | 11 | 19 | 30 | 42 | 51 | 56 | 54 | 47 | 37 | 27 | 17 | 33 |
| Precip in | 3.2 | 2.9 | 3.3 | 3.9 | 4.0 | 4.7 | 4.5 | 4.1 | 3.6 | 4.7 | 3.3 | 4.2 | 46.4 |
1996–2025 normals for Windsor County — the climate division Norwich sits in. All-time county record high 95.0°F (1953-07-19); record low -31.7°F (1957-01-14). Source: NOAA / National Weather Service.