Derby, IA Weather - Forecast & Monthly Averages

TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.

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Weather Quick Facts

The highest monthly average temperature in Derby for July is 75.8 degrees
The lowest monthly average temperature in Derby for February is 23.7 degrees
The most monthly precipitation in Derby occurs in September with 10.8 inches
The air quality index in Derby is 7% better than the national average
The pollution index in Derby is 86% better 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	15°F	36°F	24°F	1.5"
February	15°F	35°F	24°F	2.3"
March	30°F	51°F	39°F	3.5"
April	41°F	65°F	52°F	8.7"
May	52°F	74°F	62°F	7.1"
June	62°F	83°F	72°F	5.9"
July	66°F	87°F	76°F	7.3"
August	63°F	84°F	72°F	7.4"
September	54°F	77°F	64°F	10.8"
October	43°F	66°F	53°F	4.9"
November	30°F	50°F	39°F	4.4"
December	22°F	39°F	30°F	4.0"

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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	Iowa	National
Air quality index	39	39	42
Pollution index	376,148	1,154,535	2,726,193

Derby air quality

Measurement	Total
Days measured	365
Days with good air quality	306
Days with moderate air quality	59
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.000%
Benzene	0.010%
Carbon Tetrachloride	0.001%
Lead	0.001%
Mercury	0.000%

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.
Garden Grove, IA	203	39	22.0%
Weldon, IA	145	39	22.0%
Lucas, IA	113	39	22.0%
Humeston, IA	449	39	22.0%
Russell, IA	667	39	22.0%
Derby, IA	113	39	22.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Peterman, AL	113	37	26.0%
McNab, AR	113	39	22.0%
Sehili, AZ	113	17	66.0%
Guinda, CA	113	31	38.0%
Martell, CA	113	39	22.0%
Derby, IA	113	39	22.0%

Source: The Derby, IA 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.