| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 11 - Apr. 20 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 72f - River Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 62305 - Quincy, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 23 | 32 | 43 | 53 | 63 | 67 | 65 | 56 | 46 | 34 | 23 | 43 |
| Avg Max Temp (°F) | 33 | 41 | 52 | 64 | 74 | 83 | 87 | 85 | 78 | 67 | 51 | 38 | 63 |
| Avg Precip (In.) | 1.51 | 1.83 | 3.02 | 3.61 | 4.78 | 3.61 | 4.2 | 3.51 | 3.72 | 2.9 | 3.21 | 2.36 | 38.27 |