Smithtown, NY Weather - Forecast & Monthly Averages

TEMPERATURE	40
HUMIDITY	97
PRESSURE	99150
WIND COND.	270 29.5

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Weather Quick Facts

The highest monthly average temperature in Smithtown for July is 75.9 degrees
The lowest monthly average temperature in Smithtown for January is 32.3 degrees
The most monthly precipitation in Smithtown occurs in August with 5.6 inches
The air quality index in Smithtown is 2% worse than the national average
The pollution index in Smithtown is 1338% worse than the national average

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Smithtown 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	41°F	32°F	4.0"
February	24°F	43°F	33°F	3.0"
March	31°F	50°F	40°F	4.2"
April	41°F	61°F	50°F	3.5"
May	51°F	71°F	60°F	3.6"
June	60°F	79°F	69°F	4.7"
July	68°F	85°F	76°F	3.1"
August	65°F	83°F	74°F	5.6"
September	60°F	78°F	68°F	3.1"
October	49°F	67°F	58°F	4.1"
November	37°F	56°F	46°F	3.0"
December	31°F	47°F	39°F	4.9"

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Smithtown 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	Smithtown	New York	National
Air quality index	43	43	42
Pollution index	39,208,800	6,179,275	2,726,193

Smithtown air quality

Measurement	Total
Days measured	365
Days with good air quality	262
Days with moderate air quality	82
Days w/ poor A.Q. for sensitive groups	18
Days with unhealthy air quality	3

Air quality details

Pollutant	Total
Arsenic	0.060%
Benzene	0.320%
Carbon Tetrachloride	0.020%
Lead	0.320%
Mercury	0.130%

Average monthly Smithtown temperature with heat index

Smithtown monthly precipitation with daily maximum

Smithtown monthly snow depth with daily maximum

Smithtown monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
East Islip, NY	12,722	43	14.0%
Islip Terrace, NY	5,244	43	14.0%
West Islip, NY	26,614	43	14.0%
Belle Terre, NY	791	43	14.0%
Hauppauge, NY	19,661	43	14.0%
Smithtown, NY	26,197	43	14.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Troy, OH	26,176	47	6.0%
Clarksburg, MD	26,234	47	6.0%
Galt, CA	26,235	45	10.0%
Belmont, MA	26,158	43	14.0%
University Park, FL	26,150	41	18.0%
Smithtown, NY	26,197	43	14.0%

Source: The Smithtown, NY 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.