Brewster, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35 °F (low) to 61 °F (high). Annual precipitation averages 24.2 Inches. Brewster is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.1 °F | 35.5 °F | 0.46 in. |
| February | 14.5 °F | 38.7 °F | 0.77 in. |
| March | 23.2 °F | 49.8 °F | 1.26 in. |
| April | 32.8 °F | 59.2 °F | 2.64 in. |
| May | 44.5 °F | 69.7 °F | 4.04 in. |
| June | 55.3 °F | 80.3 °F | 4.03 in. |
| July | 60.8 °F | 86.5 °F | 3.11 in. |
| August | 58.3 °F | 84.9 °F | 2.85 in. |
| September | 48.2 °F | 76.9 °F | 1.94 in. |
| October | 34.4 °F | 63.6 °F | 1.85 in. |
| November | 22.5 °F | 49.4 °F | 0.77 in. |
| December | 13.8 °F | 38.0 °F | 0.49 in. |
| Annual | 35 °F | 61 °F | 24.21 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |