Brownville, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.1 °F (low) to 63.3 °F (high). Annual precipitation averages 33.8 Inches. Brownville is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.6 °F | 34.4 °F | 0.78 in. |
| February | 18.9 °F | 39.8 °F | 1.12 in. |
| March | 29.4 °F | 52.7 °F | 1.97 in. |
| April | 40.1 °F | 64.3 °F | 3.15 in. |
| May | 52.3 °F | 74.5 °F | 5.3 in. |
| June | 62.5 °F | 83.6 °F | 4.71 in. |
| July | 66.2 °F | 87.1 °F | 4.46 in. |
| August | 63.5 °F | 85.6 °F | 3.56 in. |
| September | 54.2 °F | 79.5 °F | 3.22 in. |
| October | 41.9 °F | 67.4 °F | 2.56 in. |
| November | 29.4 °F | 51.5 °F | 1.77 in. |
| December | 19.6 °F | 39.0 °F | 1.2 in. |
| Annual | 41.1 °F | 63.3 °F | 33.8 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°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 |