Glasgow, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.5 °C (low) to 18 °C (high). Annual precipitation averages 1044.7 Millimeters. Glasgow is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.2 °C | 3.1 °C | 40.39 mm |
| February | -5.1 °C | 6 °C | 50.55 mm |
| March | 0.3 °C | 12 °C | 72.14 mm |
| April | 6 °C | 18.4 °C | 111 mm |
| May | 12.3 °C | 23.6 °C | 133.1 mm |
| June | 17.7 °C | 28.8 °C | 129.03 mm |
| July | 19.8 °C | 30.7 °C | 113.54 mm |
| August | 18.4 °C | 30.1 °C | 97.54 mm |
| September | 13.5 °C | 26.3 °C | 96.52 mm |
| October | 6.8 °C | 19.7 °C | 85.09 mm |
| November | 0.7 °C | 12.2 °C | 66.8 mm |
| December | -4.7 °C | 5.5 °C | 49.02 mm |
| Annual | 6.5 °C | 18 °C | 1044.72 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |