Agency, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.7 °F (low) to 64.6 °F (high). Annual precipitation averages 38.7 Inches. Agency 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.2 °F | 37.0 °F | 1.06 in. |
| February | 21.1 °F | 42.3 °F | 1.45 in. |
| March | 31.4 °F | 54.5 °F | 2.32 in. |
| April | 41.8 °F | 65.4 °F | 3.8 in. |
| May | 53.3 °F | 75.0 °F | 5.3 in. |
| June | 63.2 °F | 84.2 °F | 5.12 in. |
| July | 67.0 °F | 88.1 °F | 4.93 in. |
| August | 64.6 °F | 86.7 °F | 4.16 in. |
| September | 55.9 °F | 79.7 °F | 3.8 in. |
| October | 43.2 °F | 67.7 °F | 3.15 in. |
| November | 31.8 °F | 53.8 °F | 2.0 in. |
| December | 21.8 °F | 41.3 °F | 1.62 in. |
| Annual | 42.7 °F | 64.6 °F | 38.71 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |