Halstead, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.6 °C (low) to 19.6 °C (high). Annual precipitation averages 834.7 Millimeters. Halstead is located in USDA Plant Hardiness Zone 7a. 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 | -5.5 °C | 5.7 °C | 18.8 mm |
| February | -3.8 °C | 8.2 °C | 31.5 mm |
| March | 1.4 °C | 14.1 °C | 58.93 mm |
| April | 6.7 °C | 19.3 °C | 70.87 mm |
| May | 12.8 °C | 24.3 °C | 129.79 mm |
| June | 18.4 °C | 30.3 °C | 121.67 mm |
| July | 20.7 °C | 32.8 °C | 105.66 mm |
| August | 19.8 °C | 31.9 °C | 97.28 mm |
| September | 15.2 °C | 27.8 °C | 66.29 mm |
| October | 8.1 °C | 21 °C | 65.02 mm |
| November | 1.4 °C | 13.4 °C | 38.61 mm |
| December | -3.9 °C | 6.8 °C | 30.23 mm |
| Annual | 7.6 °C | 19.6 °C | 834.65 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |