Brunswick Maine Climate Data

Monthly Average Climate Data for Brunswick Maine

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.0 °F30.7 °F3.72 in.
February13.0 °F33.7 °F3.54 in.
March22.8 °F41.1 °F4.18 in.
April33.0 °F53.1 °F4.45 in.
May43.4 °F64.1 °F3.63 in.
June52.9 °F72.8 °F4.78 in.
July58.9 °F78.9 °F3.65 in.
August57.6 °F78.2 °F3.44 in.
September50.2 °F70.9 °F4.03 in.
October39.4 °F58.6 °F5.44 in.
November29.6 °F47.2 °F4.54 in.
December19.1 °F36.7 °F4.69 in.
Annual35.9 °F55.5 °F50.09 in.

Climate Data for Brunswick Maine

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year