| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 59a - Connecticut Valley |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 06096 - Windsor Locks, CT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 19 | 28 | 38 | 48 | 57 | 63 | 61 | 52 | 41 | 33 | 23 | 40 |
| Avg Max Temp (°F) | 35 | 38 | 48 | 60 | 72 | 80 | 85 | 83 | 74 | 63 | 51 | 39 | 61 |
| Avg Precip (In.) | 3.82 | 2.94 | 3.87 | 3.85 | 4.23 | 3.82 | 3.68 | 3.92 | 4.08 | 3.88 | 3.96 | 3.59 | 45.63 |