Onset, MA Weather - Forecast & Monthly Averages

TEMPERATURE	12
HUMIDITY
PRESSURE	102440
WIND COND.	320 22.3

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Weather Quick Facts

The highest monthly average temperature in Onset for July is 71.5 degrees
The lowest monthly average temperature in Onset for February is 30.1 degrees
The most monthly precipitation in Onset occurs in September with 14.3 inches
The air quality index in Onset is 14% better than the national average
The pollution index in Onset is 257% worse than the national average

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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.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	24°F	39°F	31°F	6.8"
February	23°F	39°F	30°F	6.4"
March	29°F	46°F	37°F	7.5"
April	38°F	56°F	47°F	9.7"
May	48°F	65°F	56°F	6.2"
June	58°F	73°F	65°F	8.0"
July	64°F	79°F	72°F	9.7"
August	62°F	77°F	69°F	9.2"
September	55°F	70°F	62°F	14.3"
October	45°F	61°F	53°F	4.9"
November	38°F	52°F	45°F	10.3"
December	28°F	44°F	36°F	7.1"

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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.
Index	Onset	Massachusetts	National
Air quality index	36	40	42
Pollution index	9,737,620	8,399,610	2,726,193

Onset air quality

Measurement	Total
Days measured	359
Days with good air quality	348
Days with moderate air quality	11
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.180%
Benzene	0.070%
Carbon Tetrachloride	0.040%
Lead	0.170%
Mercury	0.140%

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	Population	Air Quality Index	National Avg.
Marion Center, MA	1,061	36	28.0%
Pocasset, MA	2,596	36	28.0%
Seconsett Island, MA	37	36	28.0%
West Wareham, MA	2,398	36	28.0%
Bourne, MA	1,377	36	28.0%
Onset, MA	1,049	36	28.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Skyline, AL	1,049	44	12.0%
Herald, CA	1,049	45	10.0%
Saybrook Manor, CT	1,049	37	26.0%
Canon, GA	1,049	41	18.0%
Tyrone, OK	1,049	15	70.0%
Onset, MA	1,049	36	28.0%

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.