| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 67b - Northern Shale Valleys | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 17252 - Saint Thomas, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 22 | 30 | 39 | 48 | 57 | 61 | 60 | 52 | 40 | 33 | 25 | 41 |
| Avg Max Temp (°F) | 38 | 42 | 52 | 64 | 73 | 82 | 86 | 84 | 77 | 66 | 54 | 43 | 63 |
| Avg Precip (In.) | 2.99 | 2.53 | 3.61 | 3.54 | 4.17 | 4.02 | 3.59 | 3.55 | 3.62 | 3.28 | 3.36 | 3.12 | 41.37 |