Alton, NH Weather - Forecast & Monthly Averages

TEMPERATURE	42
HUMIDITY	46
PRESSURE	100370
WIND COND.	260 22.3

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Weather Quick Facts

The highest monthly average temperature in Alton for August is 69.7 degrees
The lowest monthly average temperature in Alton for February is 20.8 degrees
The most monthly precipitation in Alton occurs in October with 14.4 inches
The air quality index in Alton is 26% better than the national average
The pollution index in Alton is 52% worse than the national average

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Alton 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	14°F	32°F	22°F	1.7"
February	12°F	32°F	21°F	3.0"
March	21°F	42°F	30°F	4.7"
April	34°F	56°F	43°F	7.1"
May	44°F	65°F	53°F	4.1"
June	57°F	78°F	66°F	7.3"
July	61°F	81°F	70°F	4.3"
August	60°F	83°F	70°F	4.3"
September	55°F	75°F	64°F	6.0"
October	46°F	62°F	53°F	14.4"
November	31°F	47°F	38°F	7.1"
December	18°F	34°F	25°F	3.8"

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Alton 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	Alton	New Hampshire	National
Air quality index	31	34	42
Pollution index	4,139,320	3,959,618	2,726,193

Alton air quality

Measurement	Total
Days measured	316
Days with good air quality	308
Days with moderate air quality	8
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.010%
Benzene	0.060%
Carbon Tetrachloride	0.010%
Lead	0.020%
Mercury	0.010%

Average monthly Alton temperature with heat index

Alton monthly precipitation with daily maximum

Alton monthly snow depth with daily maximum

Alton monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Pittsfield, NH	1,464	27	46.0%
Loudon, NH	830	27	46.0%
Rochester, NH	31,305	27	46.0%
Wolfeboro, NH	3,352	31	38.0%
Meredith, NH	2,651	31	38.0%
Alton, NH	170	31	38.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
White Mountain, AK	170	38	24.0%
Palominas, AZ	170	45	10.0%
Santa Claus, GA	170	26	48.0%
Haverhill, IA	170	37	26.0%
Webster, IA	170	35	30.0%
Alton, NH	170	31	38.0%

Source: The Alton, NH 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.