Lamont, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.3 °C (low) to 21.9 °C (high). Annual precipitation averages 886.2 Millimeters. Lamont is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.7 °C | 8.4 °C | 27.94 mm |
| February | -2.8 °C | 11 °C | 33.02 mm |
| March | 2.2 °C | 16.4 °C | 62.74 mm |
| April | 7.1 °C | 21.6 °C | 89.92 mm |
| May | 13.4 °C | 26.3 °C | 121.67 mm |
| June | 18.9 °C | 31.8 °C | 123.7 mm |
| July | 21.3 °C | 34.6 °C | 94.49 mm |
| August | 20.3 °C | 34 °C | 92.46 mm |
| September | 15.8 °C | 29.8 °C | 69.6 mm |
| October | 8.7 °C | 23.1 °C | 89.15 mm |
| November | 2.1 °C | 15.8 °C | 45.47 mm |
| December | -3.1 °C | 9.4 °C | 36.07 mm |
| Annual | 8.3 °C | 21.9 °C | 886.23 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |