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Hourly Forecast
Daylight Hours
07:25
Sunrise
19:37
Sunset
Moon
Waxing Crescent
11:55
Moonrise
21:28
Moonset
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Weather in Alpharetta today, September 15, 2026
Alpharetta sees a largely clear day on September 15, 2026, interrupted by cloudier skies around 10:00. Plan for bright conditions either side of that cloudier interval. The morning looks comparatively open, with cloud near 38% around 10:00. Early outdoor plans have a better chance of staying dry and bright.
Expect highs of 32°C and cooler readings close to 22°C. Expect humidity between 47% and 83%, most humid near 23:00. Expect gentle winds, highest near 11:00 at 4.4 km/h.
Afternoon conditions open up, holding cloud close to 19% near 12:00. The day finishes on a milder, brighter note. Horizontal visibility holds close to 16.1 km. Expect sunrise at 07:25, sunset at 19:37, and 12 hours 12 minutes of sunlight today overall.
In short, September 15, 2026 looks like a fine day in Alpharetta for being outside, peaking around 32°C.
Frequently asked questions about weather in Alpharetta
How warm does it get in Alpharetta?
The warmest month in Alpharetta is July, with average high temperatures of 31°C. The average temperature during this period is around 26°C.
How cold does it get in Alpharetta?
The coldest month in Alpharetta is January, with average low temperatures of 2°C. The average temperature during this period is around 6°C.
What is the wettest time of year in Alpharetta?
The wettest month in Alpharetta is March, with an average of 137mm of precipitation.
What is the driest time of year in Alpharetta?
The driest month in Alpharetta is November, with an average of 82mm of precipitation.
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