Rolla, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.1 °F (low) to 66.4 °F (high). Annual precipitation averages 46.7 Inches. Rolla is located in USDA Plant Hardiness Zone 6b. 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 | 22.1 °F | 41.2 °F | 2.69 in. |
| February | 25.8 °F | 46.5 °F | 2.51 in. |
| March | 34.0 °F | 56.3 °F | 4.05 in. |
| April | 44.4 °F | 67.4 °F | 4.86 in. |
| May | 54.4 °F | 75.7 °F | 5.46 in. |
| June | 63.4 °F | 83.7 °F | 4.39 in. |
| July | 67.1 °F | 88.3 °F | 4.55 in. |
| August | 65.4 °F | 87.8 °F | 4.24 in. |
| September | 57.2 °F | 80.2 °F | 4.03 in. |
| October | 45.6 °F | 69.0 °F | 3.24 in. |
| November | 35.2 °F | 55.8 °F | 3.88 in. |
| December | 26.3 °F | 44.9 °F | 2.79 in. |
| Annual | 45.1 °F | 66.4 °F | 46.69 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |