TODAY AUG21
TEMPERATURE50
HUMIDITY77
PRESSURE
WIND COND.48 3
  • 8659Fri50%60%
  • 8352Sat30%
  • 8553Sun
  • 8352Mon
  • 8552Tue
daynightWeather update from WEST FORK at

Darby 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
January19°F31°F25°F1.6"
February21°F35°F27°F1.3"
March26°F46°F36°F2.5"
April30°F55°F43°F2.4"
May37°F64°F51°F4.2"
June45°F71°F59°F3.0"
July50°F85°F68°F4.1"
August46°F82°F65°F4.6"
September40°F73°F57°F6.3"
October33°F55°F44°F3.0"
November24°F39°F31°F2.0"
December15°F28°F21°F1.8"

Did you know?

  • The highest monthly average temperature in Darby for July is 68 degrees.
  • The lowest monthly average temperature in Darby for December is 21 degrees.
  • The most monthly precipitation in Darby occurs in September with 6.3 inches.
  • The air quality index in Darby is 10% worse than the national average.
  • The pollution index in Darby is 83% better than the national average.

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Compare Darby, MT Weather To Other Cities

Darby 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.
IndexDarbyMontanaNational
Air quality index553450
Pollution index848,303685,9255,066,862

Darby air quality information

MeasurementTotal
Days measured365
Days with good air quality160
Days with moderate air quality181
Days w/ poor A.Q. for sensitive groups18
Days with unhealthy air quality6

Darby air quality information

PollutantTotal
Arsenic0.000%
Benzene0.020%
Carbon Tetrachloride0.002%
Lead0.010%
Mercury0.000%

Average monthly Darby temperature with heat index

Darby monthly precipitation with daily maximum

Darby monthly snow depth with daily maximum

Darby monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Sula, MT612942%
Charlos Heights, MT1685510%
Conner, MT1285510%
Darby, MT6815510%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Bobtown, PA6813040%
Cascade, WI6813922%
Mathiston, MS6813334%
Bloomingdale, MI6813922%
Bellamy, AL6813138%
Darby, MT6815510%
Source: The Darby, MT 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.