| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 59c - Southern New England Coastal Plains and Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 06468 - Monroe, CT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 21 | 29 | 38 | 48 | 57 | 63 | 61 | 54 | 42 | 34 | 25 | 41 |
| Avg Max Temp (°F) | 36 | 39 | 48 | 59 | 71 | 79 | 84 | 81 | 74 | 63 | 51 | 40 | 60 |
| Avg Precip (In.) | 5.11 | 3.47 | 5.63 | 5.09 | 4.99 | 4.73 | 4.17 | 4.2 | 4.56 | 4.63 | 5.4 | 5.06 | 57.04 |