| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°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: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 17050 - Mechanicsburg, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 21 | 23 | 31 | 40 | 50 | 59 | 64 | 63 | 55 | 43 | 35 | 26 | 43 |
| Avg Max Temp (°F) | 37 | 40 | 51 | 63 | 73 | 81 | 86 | 84 | 76 | 65 | 52 | 41 | 62 |
| Avg Precip (In.) | 3.18 | 2.73 | 3.5 | 3.34 | 4.28 | 4.02 | 3.56 | 3.29 | 3.92 | 3.15 | 3.45 | 3.13 | 41.55 |