Alpharetta Weather in September

With daytime temperatures of 28°C (82°F) and nighttime lows of 17°C (63°F), September in Alpharetta brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 90 mm (3.5 in) falls on average.

Rainfall in Alpharetta in September

You can expect rain on around 8 days based on historical patterns, with 90 mm (3.5 in) average for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Alpharetta in September

September is a perfect month in Alpharetta, with 28°C (82°F) during the day and 17°C (63°F) at night. Overall, the month follows a fairly predictable daily temperature pattern. At 17°C (63°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Alpharetta in September

The days are predominantly sunny, with an estimated total of around 227 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Alpharetta.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Alpharetta's climate page.

Alpharetta Temperature in September

Min Temperature 17°C (63°F)  

Max Temperature 28°C (82°F)  

Chance of Rain 27%  

Precipitation 90 mm (3.5 in)  

Rainy days 8 days  

Humidity 74% *  

Sunshine 227 hours *  

Percentage Sunshine 61% *  

* Data from: Atlanta, the United States of America (37 KM, 23 Miles).

What to Wear in Alpharetta in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Alpharetta in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Alpharetta's climate page.

More climate data for Alpharetta

Temperature Rainfall Sunshine Humidity

See the full Alpharetta climate overview or explore weather in the United States of America.