Urbana, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.1 °C (low) to 18.1 °C (high). Annual precipitation averages 1133.6 Millimeters. Urbana is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.1 °C | 5 °C | 77.47 mm |
| February | -3.3 °C | 6.8 °C | 66.29 mm |
| March | 0.4 °C | 11.6 °C | 96.01 mm |
| April | 5.8 °C | 18.4 °C | 87.12 mm |
| May | 11.3 °C | 23.2 °C | 107.19 mm |
| June | 16.2 °C | 28 °C | 109.22 mm |
| July | 18.9 °C | 30.4 °C | 114.81 mm |
| August | 17.8 °C | 29.3 °C | 86.87 mm |
| September | 14.1 °C | 25.6 °C | 113.79 mm |
| October | 7.8 °C | 19.2 °C | 97.54 mm |
| November | 2.1 °C | 12.9 °C | 84.84 mm |
| December | -1.7 °C | 7.2 °C | 92.46 mm |
| Annual | 7.1 °C | 18.1 °C | 1133.61 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |