Tygh Valley, Oregon has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 4.2 °C (low) to 18.4 °C (high). Annual precipitation averages 381.5 Millimeters. 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 | -2.2 °C | 6.1 °C | 58.67 mm |
| February | -1.6 °C | 9.1 °C | 45.97 mm |
| March | 0.2 °C | 13.2 °C | 34.8 mm |
| April | 2.7 °C | 17.7 °C | 28.45 mm |
| May | 6.6 °C | 22.6 °C | 27.43 mm |
| June | 9.7 °C | 26.3 °C | 16.51 mm |
| July | 12.8 °C | 31.8 °C | 5.33 mm |
| August | 12.3 °C | 31.8 °C | 6.86 mm |
| September | 8.6 °C | 27.3 °C | 10.16 mm |
| October | 3.7 °C | 18.8 °C | 27.69 mm |
| November | -0.1 °C | 10.4 °C | 51.31 mm |
| December | -2.4 °C | 5.5 °C | 68.33 mm |
| Annual | 4.2 °C | 18.4 °C | 381.51 mm |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |