Condon, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 29.6 °F (low) to 55.9 °F (high). Annual precipitation averages 22 Inches. Condon is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.5 °F | 33.3 °F | 2.13 in. |
| February | 16.3 °F | 37.4 °F | 1.66 in. |
| March | 22.4 °F | 46.3 °F | 1.64 in. |
| April | 28.5 °F | 53.9 °F | 1.91 in. |
| May | 35.0 °F | 64.0 °F | 2.19 in. |
| June | 41.5 °F | 71.1 °F | 2.82 in. |
| July | 45.8 °F | 82.6 °F | 1.06 in. |
| August | 44.5 °F | 82.4 °F | 0.98 in. |
| September | 37.9 °F | 71.3 °F | 1.49 in. |
| October | 29.8 °F | 55.4 °F | 1.94 in. |
| November | 22.4 °F | 40.7 °F | 2.1 in. |
| December | 16.0 °F | 32.3 °F | 2.06 in. |
| Annual | 29.6 °F | 55.9 °F | 21.98 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |