Newton, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.5 °C (low) to 25.7 °C (high). Annual precipitation averages 1330.2 Millimeters. Newton is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.7 °C | 16.4 °C | 122.94 mm |
| February | 4.3 °C | 18.3 °C | 117.35 mm |
| March | 7.6 °C | 22.2 °C | 130.56 mm |
| April | 11.6 °C | 25.9 °C | 103.12 mm |
| May | 16.4 °C | 29.9 °C | 70.36 mm |
| June | 20.5 °C | 32.2 °C | 136.65 mm |
| July | 22 °C | 33.3 °C | 140.97 mm |
| August | 21.6 °C | 32.9 °C | 130.3 mm |
| September | 19.1 °C | 31.1 °C | 106.17 mm |
| October | 13 °C | 26.9 °C | 71.12 mm |
| November | 6.8 °C | 21.7 °C | 84.07 mm |
| December | 4.3 °C | 17.5 °C | 116.59 mm |
| Annual | 12.5 °C | 25.7 °C | 1330.2 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |