Hayden, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.5 °C (low) to 18.1 °C (high). Annual precipitation averages 1240.5 Millimeters. Hayden is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.3 °C | 4 °C | 87.63 mm |
| February | -4.1 °C | 6.4 °C | 74.93 mm |
| March | 0.3 °C | 12.2 °C | 104.65 mm |
| April | 5.9 °C | 19 °C | 130.05 mm |
| May | 11.7 °C | 23.8 °C | 132.84 mm |
| June | 16.3 °C | 28 °C | 130.05 mm |
| July | 18.2 °C | 29.6 °C | 111.25 mm |
| August | 17.3 °C | 29.3 °C | 101.85 mm |
| September | 13 °C | 26.3 °C | 86.61 mm |
| October | 6.5 °C | 19.9 °C | 88.9 mm |
| November | 1.2 °C | 12.5 °C | 95.5 mm |
| December | -2.9 °C | 6.3 °C | 96.27 mm |
| Annual | 6.5 °C | 18.1 °C | 1240.53 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |