| 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 Zone 6b: -5°F to 0°F 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. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 39g - Meramec River Hills |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 65565 - Steelville, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 22 | 30 | 40 | 49 | 58 | 63 | 61 | 53 | 41 | 31 | 22 | 41 |
| Avg Max Temp (°F) | 41 | 48 | 58 | 69 | 77 | 84 | 89 | 88 | 80 | 70 | 56 | 45 | 67 |
| Avg Precip (In.) | 2.12 | 2.31 | 3.53 | 4.15 | 4.48 | 3.86 | 3.84 | 3.61 | 3.58 | 3.33 | 4.05 | 2.88 | 41.74 |