Derry, NH Weather - Forecast & Monthly Averages

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TEMPERATURE	46
HUMIDITY	66
PRESSURE	100609.6
WIND COND.	320 25.9

Weather Quick Facts

The highest monthly average temperature in Derry for July is 73.8 degrees
The lowest monthly average temperature in Derry for January is 26.2 degrees
The most monthly precipitation in Derry occurs in October with 5.4 inches
The air quality index in Derry is 12% better than the national average
The pollution index in Derry is 142% worse than the national average

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Derry 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	18°F	36°F	26°F	2.5"
February	18°F	38°F	27°F	3.0"
March	27°F	46°F	36°F	3.6"
April	38°F	61°F	49°F	3.3"
May	48°F	71°F	59°F	3.9"
June	58°F	79°F	68°F	4.6"
July	64°F	85°F	74°F	3.8"
August	61°F	83°F	72°F	4.3"
September	55°F	76°F	65°F	3.9"
October	44°F	64°F	53°F	5.4"
November	33°F	52°F	42°F	3.1"
December	24°F	40°F	31°F	3.6"

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Derry 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	Derry	New Hampshire	National
Air quality index	37	34	42
Pollution index	6,602,810	3,959,618	2,726,193

Derry air quality

Measurement	Total
Days measured	365
Days with good air quality	353
Days with moderate air quality	12
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.010%
Benzene	0.070%
Carbon Tetrachloride	0.020%
Lead	0.060%
Mercury	0.010%

Average monthly Derry temperature with heat index

Derry monthly precipitation with daily maximum

Derry monthly snow depth with daily maximum

Derry monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Amherst, NH	676	37	26.0%
Lawrence, MA	82,025	37	26.0%
Raymond, NH	3,923	37	26.0%
Manchester, NH	114,918	37	26.0%
Hudson, NH	7,386	37	26.0%
Derry, NH	23,398	37	26.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Valinda, CA	23,406	72	44.0%
Granite Bay, CA	23,374	52	4.0%
Webster Groves, MO	23,373	54	8.0%
Winchester, MA	23,430	43	14.0%
Jasmine Estates, FL	23,361	43	14.0%
Derry, NH	23,398	37	26.0%

Source: The Derry, 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.