Putnam Lake, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.7 °C (low) to 15.5 °C (high). Annual precipitation averages 1277.6 Millimeters. Putnam Lake is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.7 °C | 2 °C | 96.52 mm |
| February | -6.7 °C | 3.7 °C | 70.87 mm |
| March | -2.7 °C | 8.1 °C | 100.33 mm |
| April | 3.3 °C | 15.1 °C | 98.3 mm |
| May | 8.8 °C | 20.8 °C | 91.69 mm |
| June | 13.9 °C | 25.3 °C | 110.49 mm |
| July | 16.9 °C | 28.2 °C | 117.86 mm |
| August | 16.2 °C | 27.1 °C | 133.1 mm |
| September | 12.1 °C | 23.3 °C | 120.65 mm |
| October | 5.6 °C | 16.8 °C | 123.19 mm |
| November | 0.3 °C | 10.6 °C | 104.9 mm |
| December | -4.2 °C | 4.7 °C | 109.73 mm |
| Annual | 4.7 °C | 15.5 °C | 1277.63 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |