Fairmont, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.6 °F (low) to 62.6 °F (high). Annual precipitation averages 27.9 Inches. Fairmont is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.5 °F | 35.0 °F | 0.63 in. |
| February | 18.1 °F | 39.5 °F | 0.71 in. |
| March | 27.5 °F | 52.1 °F | 1.42 in. |
| April | 37.8 °F | 63.1 °F | 2.46 in. |
| May | 49.9 °F | 73.0 °F | 4.81 in. |
| June | 60.7 °F | 83.1 °F | 4.1 in. |
| July | 64.9 °F | 86.8 °F | 3.42 in. |
| August | 62.5 °F | 84.6 °F | 3.54 in. |
| September | 53.3 °F | 78.7 °F | 2.65 in. |
| October | 40.4 °F | 66.1 °F | 2.1 in. |
| November | 27.6 °F | 51.1 °F | 1.18 in. |
| December | 18.3 °F | 38.3 °F | 0.92 in. |
| Annual | 39.6 °F | 62.6 °F | 27.94 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |