Anson, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.2 °F (low) to 54.2 °F (high). Annual precipitation averages 42.3 Inches. Anson is located in USDA Plant Hardiness Zone 5a. 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 | 6.7 °F | 27.4 °F | 2.95 in. |
| February | 7.9 °F | 30.6 °F | 2.35 in. |
| March | 18.7 °F | 39.3 °F | 2.95 in. |
| April | 31.0 °F | 51.8 °F | 3.64 in. |
| May | 42.2 °F | 64.5 °F | 3.32 in. |
| June | 51.9 °F | 73.5 °F | 4.24 in. |
| July | 57.5 °F | 79.0 °F | 3.75 in. |
| August | 55.7 °F | 78.1 °F | 3.45 in. |
| September | 47.6 °F | 70.6 °F | 3.29 in. |
| October | 36.8 °F | 57.3 °F | 4.85 in. |
| November | 27.1 °F | 44.7 °F | 3.81 in. |
| December | 15.7 °F | 33.4 °F | 3.67 in. |
| Annual | 33.2 °F | 54.2 °F | 42.27 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |