| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 72i - Western Dissected Illinoian Till Plain |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 62357 - New Salem, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 20 | 30 | 42 | 52 | 62 | 66 | 63 | 54 | 43 | 32 | 21 | 42 |
| Avg Max Temp (°F) | 33 | 40 | 51 | 63 | 73 | 82 | 86 | 85 | 78 | 66 | 51 | 38 | 62 |
| Avg Precip (In.) | 1.66 | 1.78 | 3.11 | 3.8 | 4.45 | 3.51 | 4.05 | 3.28 | 3.35 | 2.91 | 3.39 | 2.52 | 37.81 |