| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5b: -15°F to -10°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 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 69b - Uplands and Valleys of Mixed Land Use |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 15531 - Boswell, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 17 | 25 | 35 | 45 | 54 | 58 | 57 | 50 | 39 | 30 | 21 | 37 |
| Avg Max Temp (°F) | 33 | 36 | 45 | 57 | 67 | 75 | 78 | 77 | 70 | 59 | 48 | 37 | 57 |
| Avg Precip (In.) | 3.1 | 2.65 | 3.14 | 3.37 | 4.33 | 4.1 | 4.27 | 3.62 | 3.93 | 2.9 | 3.29 | 2.66 | 41.36 |