Derry, NH Weather - Forecast & Monthly Averages

TEMPERATURE	31
HUMIDITY	78
PRESSURE	102980
WIND COND.

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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 information

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

Derry air quality information

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	656	37	26.0%
Lawrence, MA	80,022	37	26.0%
Raymond, NH	3,807	37	26.0%
Manchester, NH	112,441	37	26.0%
Hudson, NH	7,230	37	26.0%
Derry, NH	22,891	37	26.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Uxbridge, ON	22,892	n/a
Marshall, TX	22,881	38	24.0%
Dickinson, ND	22,880	33	34.0%
Willoughby, OH	22,904	50	= 100
Webster Groves, MO	22,906	54	8.0%
Derry, NH	22,891	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.