Jordan, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -0.5 °C (low) to 14.3 °C (high). Annual precipitation averages 323.3 Millimeters. Jordan is located in USDA Plant Hardiness Zone 4a. 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 | -14.1 °C | -1.1 °C | 8.64 mm |
| February | -12.2 °C | 1 °C | 8.38 mm |
| March | -6.4 °C | 7.5 °C | 11.68 mm |
| April | -0.9 °C | 14.1 °C | 31.5 mm |
| May | 4.6 °C | 19.5 °C | 48.51 mm |
| June | 10.1 °C | 24.7 °C | 64.01 mm |
| July | 13.3 °C | 30.4 °C | 38.86 mm |
| August | 12.1 °C | 30 °C | 35.56 mm |
| September | 6.3 °C | 23.6 °C | 26.67 mm |
| October | -0.2 °C | 14.9 °C | 28.19 mm |
| November | -6.9 °C | 6.8 °C | 11.18 mm |
| December | -12.3 °C | 0.6 °C | 10.16 mm |
| Annual | -0.5 °C | 14.3 °C | 323.34 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |