Parsonsfield, Maine has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from 35.3 °F (low) to 54.8 °F (high). Annual precipitation averages 51.8 Inches. 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 | 11.8 °F | 28.4 °F | 3.63 in. |
| February | 12.4 °F | 31.6 °F | 3.78 in. |
| March | 21.3 °F | 40.1 °F | 4.43 in. |
| April | 32.6 °F | 53.8 °F | 4.43 in. |
| May | 43.5 °F | 66.7 °F | 3.71 in. |
| June | 52.8 °F | 74.8 °F | 4.73 in. |
| July | 57.8 °F | 79.1 °F | 4.62 in. |
| August | 56.5 °F | 78.2 °F | 3.96 in. |
| September | 48.6 °F | 70.2 °F | 3.9 in. |
| October | 38.7 °F | 56.3 °F | 5.5 in. |
| November | 28.4 °F | 44.3 °F | 4.41 in. |
| December | 19.2 °F | 33.8 °F | 4.74 in. |
| Annual | 35.3 °F | 54.8 °F | 51.84 in. |
| 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 : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |