| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F 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 6a: -10F to -5F |
| 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: | 83a - Erie Lake Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 44004 - Ashtabula, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 18 | 27 | 36 | 47 | 56 | 61 | 59 | 53 | 42 | 34 | 24 | 40 |
| Avg Max Temp (°F) | 33 | 35 | 44 | 56 | 67 | 76 | 80 | 79 | 72 | 61 | 49 | 38 | 58 |
| Avg Precip (In.) | 2.23 | 1.87 | 2.45 | 3.37 | 2.96 | 4.35 | 3.9 | 4.09 | 4.13 | 3.85 | 3.69 | 3.04 | 39.92 |