Alpharetta, GA Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Alpharetta, GA.

1 Currently Active Alert for Alpharetta

Current Conditions — Alpharetta, GA

MARIETTA MCCOLUM (KRYY)

Clear

78.8 F
Humidity:26%
Wind Speed:W 4.6 mph
Barometer:30.24 in
Dewpoint:41.0 F
Visibility:10.00 mi
Precip:--
Heat Index:77.5 F
Wind Chill:NA
Apr 22 2026, 01:05 PM EDT
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5-Day Forecast — Alpharetta, GA

Wednesday

High 84 °F
Mostly Sunny
Wednesday
Night
Low 57 °F
Partly Cloudy
Thursday

High 84 °F
Partly Sunny
Thursday
Night
Low 59 °F
Mostly Clear
Friday

High 84 °F
Partly Sunny
Friday
Night
Low 62 °F
Chance of T-storms
Saturday

High 78 °F
T-storms
Saturday
Night
Low 59 °F
Rain Showers Likely
Sunday

High 82 °F
Isolated T-storm

Detailed Forecast — Alpharetta, GA

Wednesday
Mostly Sunny. High near 84°F. Wind 2 to 6 mph, with gusts as high as 12 mph.
Wednesday Night
Partly Cloudy. Low around 57°F. Wind 1 to 3 mph, with gusts as high as 7 mph.
Thursday
Partly Sunny. High near 84°F. Wind 1 to 7 mph, with gusts as high as 12 mph.
Thursday Night
Mostly Clear. Low around 59°F. Wind 1 to 5 mph, with gusts as high as 9 mph.
Friday
Partly Sunny. High near 84°F. Wind 1 to 8 mph, with gusts as high as 14 mph.
Friday Night
Chance of Thunderstorms. Low around 62°F. Wind 2 to 6 mph, with gusts as high as 10 mph.
Saturday
Thunderstorms. High near 78°F. Wind 3 to 8 mph, with gusts as high as 15 mph.
Saturday Night
Rain Showers Likely. Low around 59°F. Wind 2 to 5 mph, with gusts as high as 10 mph.
Sunday
Isolated T-storm. High near 82°F. Wind 5 to 7 mph, with gusts as high as 12 mph.
Sunday Night
Slight Chance of Rain. Low around 59°F. Wind around 5 mph, with gusts as high as 12 mph.
Monday
Chance of Thunderstorms. High near 77°F. Wind 8 to 9 mph, with gusts as high as 17 mph.
Monday Night
Thunderstorms Likely. Low around 62°F. Wind 6 to 7 mph, with gusts as high as 14 mph.
Tuesday
Thunderstorms Likely. High near 80°F. Wind 6 to 10 mph, with gusts as high as 18 mph.
GA Radar
Current Radar • GA
Day 1 Outlook • April 22, 2026

Observation History — Alpharetta, GA

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
01:05 PM EDT W 4.6 10.00 Clear -- 78.8 41.0 26% NA 77.5 30.24 1024.0
12:45 PM EDT 11.5 10.00 Clear -- 78.8 41.0 26% NA 77.5 30.25 1024.4
12:40 PM EDT 6.9 10.00 Clear -- 78.8 41.0 26% NA 77.5 30.25 1024.4
12:20 PM EDT 5.7 10.00 Clear -- 75.2 42.8 31% NA 73.9 30.26 1024.7
12:10 PM EDT W 10.4 10.00 Clear -- 75.2 42.8 31% NA 73.9 30.26 1024.7
12:05 PM EDT 5.7 10.00 Clear -- 75.2 42.8 31% NA 73.9 30.26 1024.7
11:50 AM EDT W 9.2 10.00 Clear -- 75.2 42.8 31% NA 73.9 30.26 1024.7
11:35 AM EDT NW 8.1 10.00 Clear -- 75.2 42.8 31% NA 73.9 30.27 1025.1
11:20 AM EDT NW 5.7 10.00 Clear -- 73.4 44.6 36% NA 72.1 30.27 1025.1
11:10 AM EDT 6.9 10.00 Clear -- 73.4 44.6 36% NA 72.1 30.26 1024.7
10:50 AM EDT 11.4 10.00 Clear -- 73.9 42.1 32% NA 72.5 M
10:45 AM EDT 9.2 10.00 Clear -- 73.4 42.8 33% NA 72.0 30.26 1024.7
10:35 AM EDT 8.1 10.00 Clear -- 73.4 42.8 33% NA 72.0 30.26 1024.7
10:20 AM EDT 6.9 10.00 Clear -- 71.6 41.0 33% NA 70.0 30.26 1024.7
10:10 AM EDT W 6.9 10.00 Clear -- 69.8 42.8 38% NA NA 30.26 1024.7
10:05 AM EDT 4.6 10.00 Clear -- 69.8 % NA NA 30.26 1024.7
09:40 AM EDT W 3.4 10.00 Clear -- 68.0 44.6 43% NA NA 30.26 1024.7
09:30 AM EDT 4.6 10.00 Clear -- 64.4 44.6 49% NA NA 30.26 1024.7
09:05 AM EDT 0.0 10.00 Clear -- 62.6 46.4 55% NA NA 30.26 1024.7
08:50 AM EDT 0.0 10.00 Clear -- 60.8 46.4 59% NA NA 30.26 1024.7
08:35 AM EDT 0.0 10.00 Clear -- 59.0 48.2 67% NA NA 30.26 1024.7
08:20 AM EDT 0.0 10.00 Clear -- 57.2 48.2 72% NA NA 30.26 1024.7
08:15 AM EDT 0.0 10.00 Clear -- 57.2 48.2 72% NA NA 30.26 1024.7
08:10 AM EDT 0.0 10.00 Clear -- 57.2 48.2 72% NA NA 30.26 1024.7

Regional Weather Observation

MARIETTA MCCOLUM (KRYY)

Clear
78.8 F

CANTON/CHEROKEE (KCNI)

Clear
75.7 F

CARTERSVILLE (KVPC)

Clear
78.8 F

(KJZP)


F

CALHOUN (KCZL)

Thunderstorms
77.0 F

DALTON (KDNN)

Clear
76.6 F
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