| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| 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: | 60a - Glaciated Low Plateau | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 18656 - Sweet Valley, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 16 | 25 | 34 | 45 | 54 | 58 | 57 | 49 | 38 | 30 | 21 | 37 |
| Avg Max Temp (°F) | 32 | 35 | 45 | 57 | 68 | 77 | 81 | 79 | 71 | 60 | 47 | 37 | 57 |
| Avg Precip (In.) | 2.93 | 2.49 | 3.07 | 3.68 | 4.22 | 4.58 | 4.21 | 3.84 | 4.36 | 3.5 | 3.59 | 2.99 | 43.47 |