| 2023 Hardiness Zone: | 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. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 39e - Osage/Gasconade Hills |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 65051 - Linn, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 23 | 33 | 43 | 52 | 61 | 66 | 64 | 56 | 45 | 34 | 24 | 43 |
| Avg Max Temp (°F) | 39 | 45 | 56 | 67 | 75 | 83 | 89 | 87 | 79 | 69 | 54 | 43 | 66 |
| Avg Precip (In.) | 1.77 | 2.09 | 3.32 | 3.8 | 4.86 | 4.13 | 3.53 | 3.6 | 3.76 | 3.36 | 3.71 | 2.76 | 40.71 |