The official National Weather Service forecast for Vergennes — 44.1673°N, 73.254°W, 12.9 miles from I-87.
| Addison County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 28 | 32 | 41 | 54 | 67 | 75 | 80 | 78 | 71 | 58 | 45 | 34 | 55 |
| Avg low °F | 10 | 12 | 20 | 31 | 43 | 52 | 57 | 56 | 49 | 38 | 28 | 18 | 34 |
| Precip in | 2.8 | 2.4 | 2.9 | 3.4 | 3.9 | 4.7 | 4.7 | 4.1 | 3.5 | 4.3 | 3.2 | 3.5 | 43.4 |
1996–2025 normals for Addison County — the climate division Vergennes sits in. All-time county record high 97.1°F (1975-08-03); record low -32.3°F (1994-01-27). Source: NOAA / National Weather Service.