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Weather · September

Alpharetta weather in September

Average highs of 83°F, lows of 63°F and 4.1 in of rain, from 30 years of weather records.

September is Alpharetta’s 4th warmest month, with average highs of 83°F and lows of 63°F. That is 5° cooler than August, and 11° above the yearly average high.

Average high
83°F
Average low
63°F
Precipitation
4.1 in
Wet days
8
Sunrise · sunset
7:20 AM · 7:44 PM

September across the year

  1. 52°33°Jan
  2. 56°36°Feb
  3. 64°42°Mar
  4. 73°49°Apr
  5. 80°59°May
  6. 86°66°Jun
  7. 89°70°Jul
  8. 88°69°Aug
  9. 83°63°Sep
  10. 73°51°Oct
  11. 63°41°Nov
  12. 54°36°Dec

High and low Rain

What to wear in September

  • Warm days: shorts and T-shirts.
  • Pack an umbrella or rain jacket: rain or snow falls on about 8 days this month.

What’s on in Alpharetta in September

See all upcoming events.

Around Alpharetta

Alpharetta Branch Library, Alpharetta GA
Alpharetta Branch Library, Alpharetta GAJohn Phelan · CC BY 4.0
Alpha Loop, Alpharetta GA
Alpha Loop, Alpharetta GAJohn Phelan · CC BY 4.0
Rucker House, Alpharetta
Rucker HouseRheave · CC BY-SA 3.0

See Alpharetta

A look around town before you go.

September compared with the months around it

MonthHighLowRain
August88°F69°F4.5 in
September83°F63°F4.1 in
October73°F51°F3.4 in

Planning a trip? See the best time to visit Alpharetta and today’s forecast.

Questions

How hot does it get in Alpharetta in September?

Average highs are 83°F and average lows 63°F, for a daily mean of 73°F. Individual days run hotter or colder than these 30-year averages.

Does it rain in Alpharetta in September?

September averages 4.1 in of precipitation over about 8 days with at least 0.01 in. It is the 9th wettest month of the year.

What time is sunset in Alpharetta in September?

Around mid-September the sun rises about 7:20 AM and sets about 7:44 PM, for roughly 12.4 hours of daylight.

Is September a good time to visit Alpharetta?

The mildest months for visiting are April, May, October. September is warm, with Halloween events.

NOAA U.S. Climate Normals 1991–2020, Atlanta Peachtree Ap station (13.4 mi from downtown). Sunrise and sunset are calculated for September 15 at the city’s coordinates.

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