Pulaski, Illinois has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.7 °C (low) to 20 °C (high). Annual precipitation averages 1266.9 Millimeters. Pulaski is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.2 °C | 6.1 °C | 95.5 mm |
| February | -1.4 °C | 9.1 °C | 92.96 mm |
| March | 2.9 °C | 14.3 °C | 120.4 mm |
| April | 8.4 °C | 20.4 °C | 137.92 mm |
| May | 14.1 °C | 25.3 °C | 132.59 mm |
| June | 18.8 °C | 29.9 °C | 112.01 mm |
| July | 20.7 °C | 31.6 °C | 96.01 mm |
| August | 19.3 °C | 30.9 °C | 74.42 mm |
| September | 14.9 °C | 27.7 °C | 86.61 mm |
| October | 8.4 °C | 21.9 °C | 99.31 mm |
| November | 2.7 °C | 14.2 °C | 113.28 mm |
| December | -1.2 °C | 8.2 °C | 105.92 mm |
| Annual | 8.7 °C | 20 °C | 1266.93 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 |