| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 83e - Upper St. Lawrence Valley |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 13676 - Potsdam, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 7 | 19 | 32 | 45 | 53 | 58 | 56 | 48 | 36 | 27 | 13 | 33 |
| Avg Max Temp (°F) | 26 | 28 | 39 | 53 | 67 | 75 | 80 | 77 | 69 | 57 | 44 | 31 | 54 |
| Avg Precip (In.) | 2.63 | 2.24 | 2.66 | 3.14 | 3.19 | 3.48 | 3.72 | 3.97 | 4.23 | 3.36 | 3.56 | 2.97 | 39.15 |