Parsonsfield, Maine has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from 1.8 °C (low) to 12.7 °C (high). Annual precipitation averages 1316.7 Millimeters. Parsonsfield is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.2 °C | -2 °C | 92.2 mm |
| February | -10.9 °C | -0.2 °C | 96.01 mm |
| March | -5.9 °C | 4.5 °C | 112.52 mm |
| April | 0.3 °C | 12.1 °C | 112.52 mm |
| May | 6.4 °C | 19.3 °C | 94.23 mm |
| June | 11.6 °C | 23.8 °C | 120.14 mm |
| July | 14.3 °C | 26.2 °C | 117.35 mm |
| August | 13.6 °C | 25.7 °C | 100.58 mm |
| September | 9.2 °C | 21.2 °C | 99.06 mm |
| October | 3.7 °C | 13.5 °C | 139.7 mm |
| November | -2 °C | 6.8 °C | 112.01 mm |
| December | -7.1 °C | 1 °C | 120.4 mm |
| Annual | 1.8 °C | 12.7 °C | 1316.72 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°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 |