Rockland
Maine, USA
Long term weather forecast
Long term weather forecast

September weather forecast and Climate
Rockland, ME

  • Average high temperature in September: 68°F

Warmest months (with highest average high temperature) are July and August (76°F).
Month with lowest average high temperature is January (30°F).

  • Average low temperature in September: 50°F

Month with highest average low temperature is July (59°F).
Coldest month (with lowest average low temperature) is January (10°F).

  • Average rainfall in September: 4.5"

Wettest month (with highest rainfall) is November (5.7").
Driest month (with lowest rainfall) is August (3.3").

  • Average rainfall days in September: 9 days

Month with highest number of rainy days is December (13 days).
Month with lowest number of rainy days is September (9 days).

  • Average sea temperature in September: 55°F

Best month for swimming (with highest average sea temperature) is August (59°F).
Coldest month (with lowest average sea temperature) is March (39°F).

  • Average daylight in September: 12h

Months with longest days are May, June and July (Average daylight: 15).
Months with shortest days are January and December (Average daylight: 9).

  • Average sunshine in September: 7h

Months with most sunshine are June, July and August (Average sunshine: 8).
Months with least sunshine are January, November and December (Average sunshine: 4).

  • Average UV index in September: 5

Months with highest UV index are June and July (UV index 8).
Months with lowest UV index are January and December (UV index 1).

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