Norris, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.3 °F (low) to 69 °F (high). Annual precipitation averages 57.1 Inches. Norris is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 27.9 °F | 46.8 °F | 5.13 in. |
| February | 30.9 °F | 51.5 °F | 5.44 in. |
| March | 37.1 °F | 60.5 °F | 5.31 in. |
| April | 45.6 °F | 70.5 °F | 5.33 in. |
| May | 55.2 °F | 78.2 °F | 4.36 in. |
| June | 63.1 °F | 84.4 °F | 4.74 in. |
| July | 67.2 °F | 87.0 °F | 5.56 in. |
| August | 66.0 °F | 86.5 °F | 4.06 in. |
| September | 59.8 °F | 81.7 °F | 3.96 in. |
| October | 47.5 °F | 71.1 °F | 3.16 in. |
| November | 36.4 °F | 59.4 °F | 4.23 in. |
| December | 31.4 °F | 49.9 °F | 5.79 in. |
| Annual | 47.3 °F | 69 °F | 57.07 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |