| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 70c - Pittsburgh Low Plateau |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 15085 - Trafford, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 20 | 28 | 37 | 48 | 57 | 61 | 60 | 53 | 41 | 33 | 25 | 40 |
| Avg Max Temp (°F) | 36 | 40 | 50 | 61 | 71 | 80 | 83 | 82 | 75 | 64 | 52 | 41 | 61 |
| Avg Precip (In.) | 2.7 | 2.38 | 3.3 | 3.25 | 3.97 | 3.97 | 4.12 | 3.79 | 3.49 | 2.49 | 3.24 | 2.84 | 39.55 |