Tygh Valley, Oregon has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 39.5 °F (low) to 65.1 °F (high). Annual precipitation averages 15 Inches. Tygh Valley is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.1 °F | 42.9 °F | 2.31 in. |
| February | 29.2 °F | 48.3 °F | 1.81 in. |
| March | 32.4 °F | 55.7 °F | 1.37 in. |
| April | 36.9 °F | 63.8 °F | 1.12 in. |
| May | 43.8 °F | 72.6 °F | 1.08 in. |
| June | 49.4 °F | 79.4 °F | 0.65 in. |
| July | 55.0 °F | 89.3 °F | 0.21 in. |
| August | 54.1 °F | 89.2 °F | 0.27 in. |
| September | 47.5 °F | 81.1 °F | 0.4 in. |
| October | 38.6 °F | 65.9 °F | 1.09 in. |
| November | 31.9 °F | 50.8 °F | 2.02 in. |
| December | 27.6 °F | 41.9 °F | 2.69 in. |
| Annual | 39.5 °F | 65.1 °F | 15.02 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |