TODAY OCT22
TEMPERATURE29
HUMIDITY78
PRESSURE30.07
WIND COND.
  • 4736Tue30%80%
  • 4432Wed40%
  • 4327Thu
  • 4228Fri
  • 4633Sat40%
daynightWeather update from Rockland, Knox County Regional Airport at
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Belfast Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January16°F34°F25°F6.6"
February16°F34°F25°F4.8"
March24°F41°F33°F6.1"
April35°F52°F43°F5.2"
May44°F61°F52°F6.0"
June52°F68°F60°F7.2"
July58°F75°F66°F8.7"
August57°F75°F65°F6.7"
September51°F69°F60°F7.8"
October41°F58°F50°F7.9"
November32°F49°F40°F8.2"
December22°F39°F30°F6.2"

Did you know?

  • The highest monthly average temperature in Belfast for July is 66 degrees.
  • The lowest monthly average temperature in Belfast for January is 25 degrees.
  • The most monthly precipitation in Belfast occurs in July with 8.7 inches.
  • The air quality index in Belfast is 29% better than the national average.
  • The pollution index in Belfast is 63% better than the national average.

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Compare Belfast, ME Weather To Other Cities

Belfast air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexBelfastMaineNational
Air quality index353350
Pollution index1,854,0402,555,8535,066,862

Belfast air quality information

MeasurementTotal
Days measured211
Days with good air quality201
Days with moderate air quality6
Days w/ poor A.Q. for sensitive groups4
Days with unhealthy air quality

Belfast air quality information

PollutantTotal
Arsenic0.004%
Benzene0.020%
Carbon Tetrachloride0.005%
Lead0.010%
Mercury0.002%

Average monthly Belfast temperature with heat index

Belfast monthly precipitation with daily maximum

Belfast monthly snow depth with daily maximum

Belfast monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bucksport, ME2,5643138%
Searsport, ME9253138%
Camden, ME3,3383530%
Castine, ME8993530%
Belfast, ME6,6413530%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Alta Sierra, CA6,6394216%
Oneonta, AL6,6453530%
Twin Lakes, CO6,645548%
Opp, AL6,6353334%
Eldorado at Santa Fe, NM6,6484118%
Belfast, ME6,6413530%
Source: The Belfast, ME weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.