Gem, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.8 °F (low) to 66.2 °F (high). Annual precipitation averages 20.9 Inches. Gem is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.1 °F | 42.6 °F | 0.35 in. |
| February | 18.3 °F | 45.7 °F | 0.51 in. |
| March | 26.1 °F | 56.0 °F | 0.94 in. |
| April | 34.9 °F | 64.4 °F | 1.93 in. |
| May | 46.3 °F | 74.0 °F | 3.07 in. |
| June | 57.2 °F | 85.8 °F | 2.73 in. |
| July | 62.6 °F | 90.7 °F | 3.87 in. |
| August | 60.5 °F | 88.0 °F | 3.2 in. |
| September | 51.1 °F | 80.8 °F | 1.57 in. |
| October | 37.6 °F | 67.8 °F | 1.46 in. |
| November | 25.7 °F | 54.2 °F | 0.69 in. |
| December | 17.4 °F | 43.8 °F | 0.58 in. |
| Annual | 37.8 °F | 66.2 °F | 20.9 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |