Bridgeport, Washington has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 39.7 °F (low) to 62.7 °F (high). Annual precipitation averages 10.6 Inches. Bridgeport 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.4 °F | 34.2 °F | 1.58 in. |
| February | 25.6 °F | 41.1 °F | 1.03 in. |
| March | 31.8 °F | 53.7 °F | 1.04 in. |
| April | 38.3 °F | 64.1 °F | 0.63 in. |
| May | 46.0 °F | 74.1 °F | 0.84 in. |
| June | 52.1 °F | 80.6 °F | 0.85 in. |
| July | 58.3 °F | 90.6 °F | 0.44 in. |
| August | 57.3 °F | 90.1 °F | 0.22 in. |
| September | 49.4 °F | 79.9 °F | 0.31 in. |
| October | 39.3 °F | 63.1 °F | 0.71 in. |
| November | 30.7 °F | 45.8 °F | 1.13 in. |
| December | 24.2 °F | 34.7 °F | 1.8 in. |
| Annual | 39.7 °F | 62.7 °F | 10.58 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |