| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| 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 15419 - California, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 22 | 30 | 38 | 48 | 57 | 62 | 61 | 54 | 42 | 34 | 26 | 41 |
| Avg Max Temp (°F) | 38 | 40 | 51 | 62 | 72 | 80 | 84 | 83 | 77 | 66 | 53 | 42 | 62 |
| Avg Precip (In.) | 2.76 | 2.43 | 3.38 | 3.35 | 3.9 | 3.84 | 3.98 | 3.71 | 3.27 | 2.48 | 3.15 | 2.81 | 39.05 |