Alexandria, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.4 °F (low) to 62.4 °F (high). Annual precipitation averages 40.3 Inches. Alexandria is located in USDA Plant Hardiness Zone 6a. 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 | 17.8 °F | 34.3 °F | 1.68 in. |
| February | 21.4 °F | 39.0 °F | 1.88 in. |
| March | 31.3 °F | 50.8 °F | 2.58 in. |
| April | 42.4 °F | 63.4 °F | 4.05 in. |
| May | 53.6 °F | 73.4 °F | 5.45 in. |
| June | 63.6 °F | 82.6 °F | 5.08 in. |
| July | 67.3 °F | 86.3 °F | 4.24 in. |
| August | 65.2 °F | 84.7 °F | 3.76 in. |
| September | 56.8 °F | 78.2 °F | 3.67 in. |
| October | 45.0 °F | 65.7 °F | 3.29 in. |
| November | 33.2 °F | 51.5 °F | 2.65 in. |
| December | 23.3 °F | 39.1 °F | 1.97 in. |
| Annual | 43.4 °F | 62.4 °F | 40.3 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 |