| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 67a - Northern Limestone/Dolomite Valleys |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 17044 - Lewistown, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 20 | 28 | 38 | 47 | 56 | 61 | 59 | 52 | 40 | 32 | 24 | 40 |
| Avg Max Temp (°F) | 36 | 40 | 50 | 62 | 73 | 80 | 84 | 83 | 75 | 64 | 52 | 41 | 62 |
| Avg Precip (In.) | 2.69 | 2.44 | 3.41 | 3.27 | 4.24 | 4.68 | 4.26 | 3.26 | 3.56 | 3.13 | 3.49 | 2.96 | 41.39 |