| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| 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: | 61b - Mosquito Creek/Pymatuning Lowlands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 44485 - Warren, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 18 | 26 | 34 | 45 | 54 | 58 | 56 | 50 | 39 | 31 | 23 | 37 |
| Avg Max Temp (°F) | 34 | 37 | 48 | 59 | 70 | 79 | 83 | 81 | 74 | 63 | 50 | 39 | 60 |
| Avg Precip (In.) | 2.22 | 1.78 | 2.84 | 3.27 | 3.51 | 4.06 | 4.13 | 3.42 | 3.94 | 2.65 | 3.1 | 2.79 | 37.7 |