Monument, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 36.9 °F (low) to 66.2 °F (high). Annual precipitation averages 13.1 Inches. Monument is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.7 °F | 44.6 °F | 1.37 in. |
| February | 26.8 °F | 49.2 °F | 1.0 in. |
| March | 30.9 °F | 56.4 °F | 1.45 in. |
| April | 35.3 °F | 63.4 °F | 1.28 in. |
| May | 41.4 °F | 72.4 °F | 1.64 in. |
| June | 47.4 °F | 80.5 °F | 1.26 in. |
| July | 52.5 °F | 91.5 °F | 0.43 in. |
| August | 50.2 °F | 91.3 °F | 0.39 in. |
| September | 43.6 °F | 82.1 °F | 0.44 in. |
| October | 35.1 °F | 67.6 °F | 0.97 in. |
| November | 29.6 °F | 52.1 °F | 1.28 in. |
| December | 24.8 °F | 43.2 °F | 1.54 in. |
| Annual | 36.9 °F | 66.2 °F | 13.05 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |