Hazleton, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.3 °C (low) to 18.9 °C (high). Annual precipitation averages 1220.5 Millimeters. Hazleton is located in USDA Plant Hardiness Zone 6b. 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 | -5.2 °C | 3.9 °C | 89.15 mm |
| February | -3.4 °C | 6.8 °C | 73.15 mm |
| March | 1 °C | 12.6 °C | 104.9 mm |
| April | 6.8 °C | 19.4 °C | 128.78 mm |
| May | 13 °C | 24.8 °C | 137.41 mm |
| June | 17.8 °C | 29.6 °C | 119.63 mm |
| July | 19.2 °C | 31 °C | 109.98 mm |
| August | 18.1 °C | 30.5 °C | 79.76 mm |
| September | 13.8 °C | 27.6 °C | 93.73 mm |
| October | 7.2 °C | 20.9 °C | 88.39 mm |
| November | 1.6 °C | 12.9 °C | 103.12 mm |
| December | -2.9 °C | 6.4 °C | 92.46 mm |
| Annual | 7.3 °C | 18.9 °C | 1220.46 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |