Osburn, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 1.5 °C (low) to 14 °C (high). Annual precipitation averages 869.2 Millimeters. Osburn is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.9 °C | 1.5 °C | 107.44 mm |
| February | -4.8 °C | 4 °C | 78.49 mm |
| March | -2.7 °C | 8.4 °C | 95.25 mm |
| April | 0.2 °C | 13.4 °C | 71.88 mm |
| May | 4 °C | 19.1 °C | 71.37 mm |
| June | 7.3 °C | 22.5 °C | 67.82 mm |
| July | 9.6 °C | 28.2 °C | 23.88 mm |
| August | 9.1 °C | 28.3 °C | 23.11 mm |
| September | 5.4 °C | 22.6 °C | 35.81 mm |
| October | 1.3 °C | 13.6 °C | 75.95 mm |
| November | -1.9 °C | 5.3 °C | 114.05 mm |
| December | -5.1 °C | 0.9 °C | 104.14 mm |
| Annual | 1.5 °C | 14 °C | 869.19 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |