Reid, Maryland 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 1019.3 Millimeters. Reid is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.7 °C | 4.6 °C | 76.45 mm |
| February | -4.1 °C | 6.6 °C | 57.91 mm |
| March | -0.1 °C | 11.3 °C | 86.87 mm |
| April | 5.5 °C | 18.2 °C | 91.44 mm |
| May | 10.8 °C | 23.2 °C | 98.3 mm |
| June | 15.8 °C | 28.1 °C | 91.44 mm |
| July | 18.2 °C | 30.5 °C | 87.63 mm |
| August | 17.2 °C | 29.6 °C | 82.8 mm |
| September | 13.3 °C | 25.7 °C | 98.3 mm |
| October | 7.1 °C | 19.2 °C | 90.93 mm |
| November | 1.6 °C | 12.7 °C | 73.41 mm |
| December | -2.4 °C | 6.6 °C | 83.82 mm |
| Annual | 6.5 °C | 18 °C | 1019.3 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |