Lowman, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from -0.6 °C (low) to 16 °C (high). Annual precipitation averages 662.7 Millimeters. Lowman is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.6 °C | 1.8 °C | 96.01 mm |
| February | -7.3 °C | 5.3 °C | 67.56 mm |
| March | -3.9 °C | 10.3 °C | 68.07 mm |
| April | -1.1 °C | 15.1 °C | 57.15 mm |
| May | 2.8 °C | 20.6 °C | 54.36 mm |
| June | 5.5 °C | 24.7 °C | 37.85 mm |
| July | 8.4 °C | 31.3 °C | 11.94 mm |
| August | 7.7 °C | 30.7 °C | 13.21 mm |
| September | 3.8 °C | 25.7 °C | 20.83 mm |
| October | -1 °C | 17.2 °C | 46.48 mm |
| November | -4.5 °C | 7.1 °C | 75.95 mm |
| December | -8.5 °C | 1.6 °C | 113.28 mm |
| Annual | -0.6 °C | 16 °C | 662.69 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |