TODAY OCT22
TEMPERATURE40
HUMIDITY46
PRESSURE30.09
WIND COND.
  • 5135Mon
  • 5740Tue30%20%
  • 5232Wed
  • 4527Thu
  • 4731Fri
daynightWeather update from Hartford, Hartford-Brainard Airport at
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Portland 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
January21°F39°F30°F2.9"
February21°F40°F31°F3.1"
March29°F49°F39°F3.5"
April40°F63°F51°F4.2"
May50°F73°F61°F3.8"
June60°F81°F70°F5.1"
July66°F86°F76°F4.5"
August64°F84°F73°F4.1"
September57°F78°F67°F3.5"
October46°F66°F55°F5.2"
November35°F54°F44°F3.3"
December27°F43°F35°F4.2"

Did you know?

  • The highest monthly average temperature in Portland for July is 76 degrees.
  • The lowest monthly average temperature in Portland for January is 30 degrees.
  • The most monthly precipitation in Portland occurs in October with 5.2 inches.
  • The air quality index in Portland is 7% better than the national average.
  • The pollution index in Portland is 18% better than the national average.

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Portland 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.
IndexPortlandConnecticutNational
Air quality index464350
Pollution index4,117,2507,127,5315,066,862

Portland air quality information

MeasurementTotal
Days measured365
Days with good air quality216
Days with moderate air quality138
Days w/ poor A.Q. for sensitive groups10
Days with unhealthy air quality1

Portland air quality information

PollutantTotal
Arsenic0.010%
Benzene0.050%
Carbon Tetrachloride0.010%
Lead0.010%
Mercury0.010%

Average monthly Portland temperature with heat index

Portland monthly precipitation with daily maximum

Portland monthly snow depth with daily maximum

Portland monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Colchester, CT4,4753334%
Chester Center, CT1,9864412%
Moodus, CT1,2024412%
Hartford, CT124,320468%
Manchester, CT30,364468%
Portland, CT5,607468%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Avra Valley, AZ5,606468%
Monticello, IL5,6093628%
Exeter, PA5,6054020%
Lebanon, KY5,6044314%
Kensington, CA5,6024314%
Portland, CT5,607468%
Source: The Portland, CT 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.