Clymer, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.5 °C (low) to 13.7 °C (high). Annual precipitation averages 1234.2 Millimeters. Clymer is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.2 °C | -0.4 °C | 97.54 mm |
| February | -8.9 °C | 1 °C | 70.61 mm |
| March | -4.9 °C | 6.1 °C | 84.07 mm |
| April | 0.8 °C | 13.5 °C | 100.08 mm |
| May | 6.8 °C | 19.9 °C | 106.93 mm |
| June | 11.6 °C | 24.2 °C | 117.86 mm |
| July | 13.7 °C | 26.3 °C | 124.71 mm |
| August | 13.2 °C | 25.6 °C | 100.84 mm |
| September | 9.6 °C | 22 °C | 110.49 mm |
| October | 3.9 °C | 15.2 °C | 119.38 mm |
| November | -1.1 °C | 8.2 °C | 96.27 mm |
| December | -5.1 °C | 2.3 °C | 105.41 mm |
| Annual | 2.5 °C | 13.7 °C | 1234.19 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |