Derby, CT Weather - Forecast & Monthly Averages

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TEMPERATURE	74
HUMIDITY	100
PRESSURE	101290
WIND COND.	5.4

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Weather Quick Facts

The highest monthly average temperature in Derby for August is 70.6 degrees
The lowest monthly average temperature in Derby for February is 26.4 degrees
The most monthly precipitation in Derby occurs in April with 15 inches
The air quality index in Derby is 3% better than the national average
The pollution index in Derby is 432% worse than the national average

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Derby 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	21°F	37°F	28°F	5.0"
February	19°F	35°F	26°F	9.8"
March	25°F	44°F	34°F	6.0"
April	38°F	59°F	47°F	15.0"
May	46°F	68°F	56°F	14.6"
June	58°F	78°F	67°F	11.3"
July	62°F	81°F	70°F	12.6"
August	62°F	82°F	71°F	8.3"
September	55°F	76°F	65°F	2.3"
October	48°F	64°F	54°F	12.4"
November	34°F	51°F	41°F	5.2"
December	23°F	36°F	29°F	5.5"

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Derby 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	Derby	Connecticut	National
Air quality index	41	43	42
Pollution index	14,500,300	8,629,883	2,726,193

Derby air quality

Measurement	Total
Days measured	365
Days with good air quality	280
Days with moderate air quality	71
Days w/ poor A.Q. for sensitive groups	12
Days with unhealthy air quality	2

Air quality details

Pollutant	Total
Arsenic	0.030%
Benzene	0.140%
Carbon Tetrachloride	0.050%
Lead	0.080%
Mercury	0.060%

Average monthly Derby temperature with heat index

Derby monthly precipitation with daily maximum

Derby monthly snow depth with daily maximum

Derby monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Heritage Village, CT	4,465	41	18.0%
North Haven, CT	23,665	41	18.0%
Branford Center, CT	5,845	41	18.0%
Woodmont, CT	1,601	41	18.0%
Naugatuck, CT	31,201	41	18.0%
Derby, CT	12,420	41	18.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
North St. Paul, MN	12,421	46	8.0%
Blue Ash, OH	12,417	54	8.0%
West Monroe, LA	12,431	34	32.0%
Brock, ON	12,406	n/a
Markham, IL	12,401	55	10.0%
Derby, CT	12,420	41	18.0%

Source: The Derby, CT 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.