Culdesac, Idaho has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 4.2 °C (low) to 16.7 °C (high). Annual precipitation averages 676.4 Millimeters. 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 | -2.4 °C | 3.9 °C | 69.85 mm |
| February | -1.8 °C | 6.9 °C | 60.71 mm |
| March | 0.3 °C | 11.5 °C | 73.41 mm |
| April | 3.1 °C | 15.8 °C | 71.37 mm |
| May | 6.7 °C | 20.9 °C | 68.07 mm |
| June | 9.8 °C | 24.6 °C | 53.09 mm |
| July | 12.4 °C | 31.2 °C | 19.81 mm |
| August | 12.1 °C | 31.4 °C | 17.27 mm |
| September | 8.4 °C | 25.7 °C | 26.16 mm |
| October | 3.7 °C | 16.7 °C | 56.9 mm |
| November | 0.2 °C | 8.2 °C | 79.76 mm |
| December | -2.7 °C | 3.4 °C | 80.01 mm |
| Annual | 4.2 °C | 16.7 °C | 676.41 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |