| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°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. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 61c - Low Lime Drift Plain |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 44515 - Youngstown, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 19 | 26 | 36 | 46 | 55 | 59 | 57 | 51 | 40 | 32 | 23 | 38 |
| Avg Max Temp (°F) | 34 | 38 | 48 | 60 | 71 | 79 | 83 | 82 | 75 | 63 | 50 | 39 | 60 |
| Avg Precip (In.) | 2.18 | 1.85 | 2.83 | 3.23 | 3.59 | 4.17 | 4.12 | 3.5 | 3.8 | 2.58 | 3.02 | 2.71 | 37.58 |