Clyde Park, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.9 °C (low) to 14 °C (high). Annual precipitation averages 383.5 Millimeters. Clyde Park is located in USDA Plant Hardiness Zone 4b. 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 | -9.6 °C | 2.1 °C | 12.45 mm |
| February | -8.9 °C | 3 °C | 16 mm |
| March | -5.4 °C | 7.7 °C | 26.16 mm |
| April | -1.9 °C | 12.5 °C | 51.31 mm |
| May | 2.4 °C | 17.4 °C | 58.17 mm |
| June | 6.3 °C | 22.6 °C | 64.26 mm |
| July | 9.3 °C | 28.3 °C | 30.23 mm |
| August | 8.2 °C | 28.6 °C | 29.72 mm |
| September | 4.3 °C | 22.6 °C | 30.99 mm |
| October | -0.7 °C | 14.6 °C | 32 mm |
| November | -5.7 °C | 6.5 °C | 18.03 mm |
| December | -9.5 °C | 1.5 °C | 14.22 mm |
| Annual | -0.9 °C | 14 °C | 383.54 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |