TODAY SEP24
TEMPERATURE83
HUMIDITY49
PRESSURE30.03
WIND COND. 3.4
  • 8270Mon50%40%
  • 8370Tue40%50%
  • 8469Wed60%60%
  • 8267Thu60%60%
  • 8365Fri40%30%
daynightWeather update from Atlanta, De Kalb-Peachtree Airport at
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Alpharetta Average Temperature

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
January33°F54°F43°F4.1"
February35°F57°F45°F4.0"
March43°F67°F54°F4.2"
April51°F75°F63°F4.1"
May59°F82°F70°F3.8"
June67°F90°F78°F3.6"
July70°F91°F79°F3.9"
August70°F90°F79°F4.7"
September64°F84°F73°F4.6"
October51°F75°F62°F3.4"
November40°F65°F52°F3.5"
December38°F58°F47°F5.1"

Did you know?

  • The highest monthly average temperature in Alpharetta for July is 79 degrees.
  • The lowest monthly average temperature in Alpharetta for January is 43 degrees.
  • The most monthly precipitation in Alpharetta occurs in December with 5.1 inches.
  • The air quality index in Alpharetta is 4% worse than the national average.
  • The pollution index in Alpharetta is 166% worse than the national average.

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Compare Alpharetta, GA Weather To Other Cities

Alpharetta 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.
IndexAlpharettaGeorgiaNational
Air quality index524150
Pollution index13,513,5003,237,5535,066,862

Alpharetta air quality information

MeasurementTotal
Days measured365
Days with good air quality175
Days with moderate air quality187
Days w/ poor A.Q. for sensitive groups2
Days with unhealthy air quality1

Alpharetta air quality information

PollutantTotal
Arsenic0.170%
Benzene0.180%
Carbon Tetrachloride0.040%
Lead0.080%
Mercury0.005%

Average monthly Alpharetta temperature with heat index

Alpharetta monthly precipitation with daily maximum

Alpharetta monthly snow depth with daily maximum

Alpharetta monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Cumming, GA5,7404216%
Sugar Hill, GA20,8894216%
Suwanee, GA18,0014216%
Berkeley Lake, GA1,924524%
Holly Springs, GA10,351524%
Alpharetta, GA63,013524%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Mansfield, TX63,141548%
Cheyenne, WY62,8794020%
West Hartford, CT63,187468%
Castro Valley, CA62,8254314%
Bowling Green, KY62,8243824%
Alpharetta, GA63,013524%
Source: The Alpharetta, GA 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.