Culdesac, Idaho has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 39.5 °F (low) to 62 °F (high). Annual precipitation averages 26.6 Inches. Culdesac 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 | 27.7 °F | 39.1 °F | 2.75 in. |
| February | 28.8 °F | 44.5 °F | 2.39 in. |
| March | 32.5 °F | 52.7 °F | 2.89 in. |
| April | 37.5 °F | 60.5 °F | 2.81 in. |
| May | 44.1 °F | 69.7 °F | 2.68 in. |
| June | 49.6 °F | 76.2 °F | 2.09 in. |
| July | 54.3 °F | 88.1 °F | 0.78 in. |
| August | 53.7 °F | 88.5 °F | 0.68 in. |
| September | 47.2 °F | 78.2 °F | 1.03 in. |
| October | 38.7 °F | 62.0 °F | 2.24 in. |
| November | 32.4 °F | 46.7 °F | 3.14 in. |
| December | 27.1 °F | 38.1 °F | 3.15 in. |
| Annual | 39.5 °F | 62 °F | 26.63 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |