| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 83d - St. Lawrence Lowlands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 13662 - Massena, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 7 | 19 | 33 | 45 | 53 | 58 | 56 | 48 | 37 | 28 | 13 | 34 |
| Avg Max Temp (°F) | 25 | 28 | 39 | 53 | 68 | 76 | 81 | 78 | 69 | 57 | 43 | 30 | 54 |
| Avg Precip (In.) | 2.54 | 2.1 | 2.45 | 2.96 | 2.87 | 3.34 | 3.41 | 3.56 | 3.89 | 3.01 | 3.1 | 2.95 | 36.19 |