Oregon, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.2 °F (low) to 63.3 °F (high). Annual precipitation averages 37.1 Inches. Oregon 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 | 16.1 °F | 35.3 °F | 0.78 in. |
| February | 20.5 °F | 40.7 °F | 1.22 in. |
| March | 30.1 °F | 52.7 °F | 2.26 in. |
| April | 41.1 °F | 63.9 °F | 3.75 in. |
| May | 52.8 °F | 74.0 °F | 5.26 in. |
| June | 62.6 °F | 83.1 °F | 4.8 in. |
| July | 66.7 °F | 86.8 °F | 5.42 in. |
| August | 64.4 °F | 85.6 °F | 3.98 in. |
| September | 55.2 °F | 78.7 °F | 3.27 in. |
| October | 43.4 °F | 66.8 °F | 3.04 in. |
| November | 31.4 °F | 52.6 °F | 1.88 in. |
| December | 21.5 °F | 39.6 °F | 1.48 in. |
| Annual | 42.2 °F | 63.3 °F | 37.14 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 |