Excelsior Springs, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.8 °F (low) to 64.2 °F (high). Annual precipitation averages 41.5 Inches. Excelsior Springs is located in USDA Plant Hardiness Zone 6a. 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 | 18.1 °F | 37.6 °F | 1.25 in. |
| February | 22.1 °F | 43.0 °F | 1.68 in. |
| March | 31.6 °F | 54.0 °F | 2.55 in. |
| April | 41.5 °F | 64.3 °F | 3.99 in. |
| May | 52.8 °F | 73.9 °F | 5.65 in. |
| June | 62.8 °F | 83.2 °F | 5.27 in. |
| July | 67.0 °F | 87.4 °F | 4.91 in. |
| August | 64.3 °F | 86.2 °F | 4.4 in. |
| September | 55.2 °F | 78.7 °F | 4.44 in. |
| October | 43.4 °F | 67.1 °F | 3.45 in. |
| November | 32.0 °F | 53.3 °F | 2.17 in. |
| December | 22.7 °F | 41.8 °F | 1.71 in. |
| Annual | 42.8 °F | 64.2 °F | 41.47 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |