Meacham, Oregon has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 32.7 °F (low) to 55.9 °F (high). Annual precipitation averages 34.6 Inches. Meacham is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around July 21 - July 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.9 °F | 36.6 °F | 4.32 in. |
| February | 23.0 °F | 39.9 °F | 3.0 in. |
| March | 26.0 °F | 45.8 °F | 3.43 in. |
| April | 29.6 °F | 52.7 °F | 3.51 in. |
| May | 35.8 °F | 61.2 °F | 3.83 in. |
| June | 40.7 °F | 68.3 °F | 2.36 in. |
| July | 46.6 °F | 79.7 °F | 0.71 in. |
| August | 46.6 °F | 80.0 °F | 0.8 in. |
| September | 40.8 °F | 71.1 °F | 1.27 in. |
| October | 33.1 °F | 57.3 °F | 2.63 in. |
| November | 27.2 °F | 43.3 °F | 4.27 in. |
| December | 21.3 °F | 35.3 °F | 4.5 in. |
| Annual | 32.7 °F | 55.9 °F | 34.63 in. |
| Average First Frost Date | July 21 - July 31 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |