| 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 44481 - Warren, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 18 | 26 | 34 | 45 | 54 | 58 | 57 | 50 | 39 | 31 | 23 | 38 |
| Avg Max Temp (°F) | 34 | 37 | 48 | 59 | 71 | 79 | 83 | 81 | 74 | 63 | 50 | 39 | 60 |
| Avg Precip (In.) | 2.25 | 1.78 | 2.88 | 3.28 | 3.55 | 4.1 | 4.14 | 3.44 | 3.89 | 2.63 | 3.09 | 2.8 | 37.83 |