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Southwest Harbor (ME) Climate by Month

The temperature in Southwest Harbor can vary greatly throughout the year. The temperatures shift from warm to very cold. It also experiences much rain/snowfall throughout the year. Let's now guide you through the climate details for a complete overview.

Average day and night temperature

Depending on the time of the year, temperatures range from comfortable to very cold in Southwest Harbor. Average daytime temperatures reach a comfortable 23°C in July. In February, the coolest month of the year, temperatures drop to a very cold -0°C. At night, expect cooler temperatures, averaging -9°C during this month.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Southwest Harbor has a relatively rain/snowy climate with high precipitation levels, averaging 1297 mm of rain/snowfall annually. Southwest Harbor experiences moderate seasonal variation in rainfall, with monthly averages ranging from 145 mm in October, the wettest month, and 85 mm in August, the driest month.

The mean monthly precipitation over the year, including rain, hail and snow

The best time of year to visit Southwest Harbor in the United States of America

During the months of July, August and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • Which is the warmest month in Southwest Harbor?
    July has an average maximum temperature of 23°C and is the warmest month of the year.
  • Which is the coldest month in Southwest Harbor?
    The coldest month is February with an average maximum temperature of -0°C.
  • Which is the wettest month in Southwest Harbor?
    October tops the wettest month list with 145 mm of rainfall.
  • Which is the driest month in Southwest Harbor?
    August is the driest month with 85 mm of precipitation.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

    Forecast for Southwest Harbor (ME)

    Fri   Nov 22
    9°C | 5°C
    E 32 km/h
    5.1 mm
    overcast and rain

    overcast and rain

    Sat   Nov 23
    8°C | 4°C
    N 36 km/h
    27 mm
    overcast and heavy rain

    overcast and heavy rain

    Sun   Nov 24
    7°C | 3°C
    NW 40 km/h
    1.6 mm
    broken clouds and slight rain

    broken clouds and slight rain