Peoria, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 42.4 °F (low) to 63.4 °F (high). Annual precipitation averages 40.5 Inches. Peoria is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.0 °F | 47.4 °F | 6.22 in. |
| February | 35.2 °F | 51.2 °F | 4.79 in. |
| March | 37.1 °F | 55.9 °F | 4.89 in. |
| April | 39.9 °F | 60.5 °F | 3.26 in. |
| May | 44.6 °F | 67.2 °F | 2.13 in. |
| June | 48.7 °F | 73.4 °F | 1.35 in. |
| July | 52.4 °F | 81.9 °F | 0.32 in. |
| August | 52.1 °F | 82.7 °F | 0.39 in. |
| September | 48.3 °F | 76.9 °F | 1.33 in. |
| October | 42.5 °F | 64.2 °F | 3.31 in. |
| November | 38.1 °F | 52.9 °F | 5.99 in. |
| December | 34.6 °F | 46.4 °F | 6.54 in. |
| Annual | 42.4 °F | 63.4 °F | 40.52 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |