Upper Arlington, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.5 °C (low) to 17.1 °C (high). Annual precipitation averages 1037.1 Millimeters. Upper Arlington is located in USDA Plant Hardiness Zone 6b. 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 | -5.8 °C | 2.4 °C | 73.66 mm |
| February | -4.8 °C | 4.4 °C | 60.96 mm |
| March | -0.2 °C | 10.3 °C | 84.07 mm |
| April | 5.5 °C | 17.7 °C | 98.3 mm |
| May | 11.6 °C | 23.4 °C | 109.47 mm |
| June | 16.6 °C | 27.9 °C | 115.82 mm |
| July | 18.4 °C | 29.4 °C | 106.43 mm |
| August | 17.3 °C | 28.9 °C | 90.17 mm |
| September | 13.4 °C | 25.7 °C | 77.72 mm |
| October | 7 °C | 18.7 °C | 70.1 mm |
| November | 1.3 °C | 11.2 °C | 72.9 mm |
| December | -2.7 °C | 5.1 °C | 77.47 mm |
| Annual | 6.5 °C | 17.1 °C | 1037.07 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 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 |