Humboldt, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.5 °C (low) to 21.2 °C (high). Annual precipitation averages 1411.7 Millimeters. Humboldt is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.8 °C | 8.3 °C | 106.43 mm |
| February | -0.2 °C | 10.8 °C | 121.41 mm |
| March | 4.1 °C | 16 °C | 138.43 mm |
| April | 9.2 °C | 21.8 °C | 132.84 mm |
| May | 14.7 °C | 26.2 °C | 146.56 mm |
| June | 19.1 °C | 30.4 °C | 112.78 mm |
| July | 20.9 °C | 32 °C | 108.71 mm |
| August | 19.9 °C | 31.7 °C | 93.73 mm |
| September | 15.8 °C | 28.6 °C | 101.6 mm |
| October | 9.1 °C | 22.8 °C | 99.57 mm |
| November | 3.6 °C | 15.8 °C | 114.3 mm |
| December | -0.2 °C | 10.1 °C | 135.38 mm |
| Annual | 9.5 °C | 21.2 °C | 1411.74 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |