Salem, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.3 °F (low) to 63.6 °F (high). Annual precipitation averages 35.1 Inches. Salem 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 | 15.5 °F | 35.1 °F | 0.8 in. |
| February | 19.4 °F | 40.6 °F | 1.15 in. |
| March | 29.4 °F | 53.1 °F | 2.21 in. |
| April | 40.5 °F | 64.4 °F | 3.32 in. |
| May | 52.7 °F | 74.6 °F | 5.25 in. |
| June | 62.7 °F | 83.8 °F | 5.0 in. |
| July | 66.3 °F | 87.7 °F | 4.57 in. |
| August | 63.6 °F | 86.2 °F | 3.74 in. |
| September | 54.3 °F | 79.3 °F | 3.34 in. |
| October | 42.0 °F | 67.3 °F | 2.65 in. |
| November | 29.6 °F | 52.1 °F | 1.83 in. |
| December | 20.0 °F | 39.3 °F | 1.22 in. |
| Annual | 41.3 °F | 63.6 °F | 35.08 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 |