Brownfield, Maine has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from 0.6 °C (low) to 13.1 °C (high). Annual precipitation averages 1280.9 Millimeters. Brownfield is located in USDA Plant Hardiness Zone 5a. 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 | -13.4 °C | -1.4 °C | 89.41 mm |
| February | -12.8 °C | 0.2 °C | 89.92 mm |
| March | -7.2 °C | 4.9 °C | 105.41 mm |
| April | -0.8 °C | 12.3 °C | 110.74 mm |
| May | 5.4 °C | 19.4 °C | 97.28 mm |
| June | 10.8 °C | 23.9 °C | 118.87 mm |
| July | 13.7 °C | 26.8 °C | 107.95 mm |
| August | 12.7 °C | 26.2 °C | 97.54 mm |
| September | 8.3 °C | 21.9 °C | 95.25 mm |
| October | 2.2 °C | 14.4 °C | 138.43 mm |
| November | -3.1 °C | 7.5 °C | 113.03 mm |
| December | -8.9 °C | 1.6 °C | 117.09 mm |
| Annual | 0.6 °C | 13.1 °C | 1280.92 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |