Bellevue, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from -1.3 °C (low) to 13.9 °C (high). Annual precipitation averages 372.6 Millimeters. Bellevue is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.1 °C | -0.3 °C | 49.53 mm |
| February | -10.3 °C | 2.1 °C | 42.16 mm |
| March | -5.8 °C | 7.1 °C | 36.07 mm |
| April | -1.7 °C | 12.8 °C | 25.4 mm |
| May | 2.7 °C | 18.2 °C | 53.34 mm |
| June | 5.9 °C | 23.1 °C | 23.88 mm |
| July | 9.9 °C | 29.4 °C | 7.11 mm |
| August | 9 °C | 29.1 °C | 10.41 mm |
| September | 4.7 °C | 23.5 °C | 18.29 mm |
| October | -0.7 °C | 15.5 °C | 24.89 mm |
| November | -6.3 °C | 6.5 °C | 24.89 mm |
| December | -11.2 °C | -0.2 °C | 56.64 mm |
| Annual | -1.3 °C | 13.9 °C | 372.61 mm |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |