Osburn, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 34.6 °F (low) to 57.2 °F (high). Annual precipitation averages 34.2 Inches. 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 | 23.1 °F | 34.7 °F | 4.23 in. |
| February | 23.4 °F | 39.2 °F | 3.09 in. |
| March | 27.2 °F | 47.1 °F | 3.75 in. |
| April | 32.4 °F | 56.1 °F | 2.83 in. |
| May | 39.2 °F | 66.4 °F | 2.81 in. |
| June | 45.2 °F | 72.5 °F | 2.67 in. |
| July | 49.3 °F | 82.7 °F | 0.94 in. |
| August | 48.4 °F | 82.9 °F | 0.91 in. |
| September | 41.8 °F | 72.6 °F | 1.41 in. |
| October | 34.3 °F | 56.4 °F | 2.99 in. |
| November | 28.5 °F | 41.6 °F | 4.49 in. |
| December | 22.9 °F | 33.7 °F | 4.1 in. |
| Annual | 34.6 °F | 57.2 °F | 34.22 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |