Syracuse, Kansas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 3.7 °C (low) to 20.7 °C (high). Annual precipitation averages 437.4 Millimeters. Syracuse is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.7 °C | 7.8 °C | 8.64 mm |
| February | -6.9 °C | 10.1 °C | 9.91 mm |
| March | -2.6 °C | 15.3 °C | 23.11 mm |
| April | 2.2 °C | 20.1 °C | 35.05 mm |
| May | 8.6 °C | 25.3 °C | 53.34 mm |
| June | 14.7 °C | 31.2 °C | 64.52 mm |
| July | 17.6 °C | 33.6 °C | 79.25 mm |
| August | 16.5 °C | 32.3 °C | 70.87 mm |
| September | 11.5 °C | 28.6 °C | 29.72 mm |
| October | 3.3 °C | 21.7 °C | 36.32 mm |
| November | -3.3 °C | 13.9 °C | 11.94 mm |
| December | -8.1 °C | 8 °C | 14.73 mm |
| Annual | 3.7 °C | 20.7 °C | 437.4 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |