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Onset 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
January24°F39°F31°F6.8"
February23°F39°F30°F6.4"
March29°F46°F37°F7.5"
April38°F56°F47°F9.7"
May48°F65°F56°F6.2"
June58°F73°F65°F8.0"
July64°F79°F72°F9.7"
August62°F77°F69°F9.2"
September55°F70°F62°F14.3"
October45°F61°F53°F4.9"
November38°F52°F45°F10.3"
December28°F44°F36°F7.1"

Did you know?

  • The highest monthly average temperature in Onset for July is 72 degrees.
  • The lowest monthly average temperature in Onset for February is 30 degrees.
  • The most monthly precipitation in Onset occurs in September with 14.3 inches.
  • The air quality index in Onset is 33% better than the national average.
  • The pollution index in Onset is 92% worse than the national average.

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Onset 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.
IndexOnsetMassachusettsNational
Air quality index334050
Pollution index9,737,62012,377,8395,066,862

Onset air quality information

MeasurementTotal
Days measured317
Days with good air quality308
Days with moderate air quality7
Days w/ poor A.Q. for sensitive groups2
Days with unhealthy air quality

Onset air quality information

PollutantTotal
Arsenic0.180%
Benzene0.070%
Carbon Tetrachloride0.040%
Lead0.170%
Mercury0.140%

Average monthly Onset temperature with heat index

Onset monthly precipitation with daily maximum

Onset monthly snow depth with daily maximum

Onset monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bourne, MA1,0543334%
Falmouth, MA3,7303334%
Mattapoisett Center, MA3,3903334%
Plymouth, MA7,3993334%
Sagamore, MA3,7383334%
Onset, MA1,2263334%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Holland, NY1,2264118%
Apple Mountain Lake, VA1,2263726%
Wattsville, VA1,2263628%
Homer, GA1,2264216%
Clyde, NC1,2264020%
Onset, MA1,2263334%
Source: The Onset, MA 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.