| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°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: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 83c - Ontario Lowlands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 14510 - Mount Morris, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 17 | 25 | 35 | 46 | 54 | 59 | 57 | 50 | 40 | 32 | 22 | 38 |
| Avg Max Temp (°F) | 32 | 34 | 43 | 56 | 68 | 77 | 82 | 80 | 72 | 60 | 48 | 37 | 57 |
| Avg Precip (In.) | 1.61 | 1.45 | 1.97 | 2.43 | 2.66 | 3.63 | 3.11 | 3.1 | 3.33 | 2.52 | 2.53 | 2.06 | 30.41 |