TODAY AUG18
TEMPERATURE68
HUMIDITY64
PRESSURE30.26
WIND COND.230 5.8
  • 8356Sat30%40%
  • 7451Sun
  • 8055Mon
  • 8358Tue
  • 8761Wed
daynightWeather update from Broomfield / Jeffco at

Derby Average Weather

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January21°F45°F31°F1.8"
February22°F46°F32°F2.0"
March30°F58°F42°F2.1"
April35°F63°F47°F4.0"
May44°F70°F55°F5.2"
June54°F84°F68°F4.6"
July60°F89°F73°F5.7"
August59°F87°F71°F4.5"
September51°F79°F63°F5.7"
October39°F67°F51°F4.1"
November29°F56°F41°F2.2"
December19°F44°F30°F2.9"

Did you know?

  • The highest monthly average temperature in Derby for July is 73 degrees.
  • The lowest monthly average temperature in Derby for December is 30 degrees.
  • The most monthly precipitation in Derby occurs in September with 5.7 inches.
  • The air quality index in Derby is 8% worse than the national average.
  • The pollution index in Derby is 82% better than the national average.

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Compare Derby, CO Weather To Other Cities

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.
IndexDerbyColoradoNational
Air quality index543850
Pollution index872,3092,034,6195,066,862

Derby air quality information

MeasurementTotal
Days measured365
Days with good air quality153
Days with moderate air quality189
Days w/ poor A.Q. for sensitive groups23
Days with unhealthy air quality

Derby air quality information

PollutantTotal
Arsenic0.001%
Benzene0.010%
Carbon Tetrachloride0.002%
Lead0.010%
Mercury0.000%

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, StatePopulationAir Quality IndexNational Avg.
Broomfield, CO62,4494216%
Erie, CO20,8014216%
Leyner, CO274216%
Lafayette, CO27,0534216%
Louisville, CO19,9724216%
Derby, CO8,930548%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Olney, IL8,9313334%
Canonsburg, PA8,9335612%
Makaha, HI8,9343040%
Madeira, OH8,924548%
Liberty, TX8,9364412%
Derby, CO8,930548%
Source: The Derby, CO 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.