Rensselaer, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.8 °C (low) to 15.1 °C (high). Annual precipitation averages 1069.9 Millimeters. Rensselaer is located in USDA Plant Hardiness Zone 6a. 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 | -8.2 °C | 0.5 °C | 74.42 mm |
| February | -7.5 °C | 2.2 °C | 58.17 mm |
| March | -2.9 °C | 7.2 °C | 77.98 mm |
| April | 3.4 °C | 15 °C | 80.77 mm |
| May | 9.6 °C | 21.4 °C | 83.31 mm |
| June | 14.7 °C | 25.9 °C | 117.86 mm |
| July | 17.2 °C | 28.6 °C | 125.73 mm |
| August | 16.5 °C | 27.5 °C | 98.3 mm |
| September | 12.1 °C | 23.6 °C | 98.55 mm |
| October | 5.9 °C | 16.4 °C | 97.54 mm |
| November | 0.6 °C | 9.5 °C | 73.66 mm |
| December | -4.3 °C | 3.6 °C | 83.57 mm |
| Annual | 4.8 °C | 15.1 °C | 1069.86 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |