Parker School, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -1.7 °C (low) to 12.2 °C (high). Annual precipitation averages 445.2 Millimeters. Parker School is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.1 °C | 0.7 °C | 18.03 mm |
| February | -10.9 °C | 1.4 °C | 14.73 mm |
| March | -6.9 °C | 5.8 °C | 15.24 mm |
| April | -2.5 °C | 10.8 °C | 35.05 mm |
| May | 1.7 °C | 16.2 °C | 71.37 mm |
| June | 5.7 °C | 20.7 °C | 104.39 mm |
| July | 9.2 °C | 26.9 °C | 39.88 mm |
| August | 7.8 °C | 25.9 °C | 33.27 mm |
| September | 4.2 °C | 19.9 °C | 43.94 mm |
| October | -1.1 °C | 12.2 °C | 30.73 mm |
| November | -6 °C | 5.4 °C | 25.15 mm |
| December | -10.1 °C | 0.9 °C | 13.46 mm |
| Annual | -1.7 °C | 12.2 °C | 445.24 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |