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Now · 2:03 AM

Alpharetta Weather & Hourly Forecast

United States · Georgia · 30005

73°F

Mostly clear night

Feels like: 77°F

💧 Humidity 96% 🌡 Pressure 29.91 inHg 💨 Wind 7 mph 👁 Visibility 6.5 mi ☁ Clouds 14% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Alpharetta

Today

3:00 AM

Mostly clear night

72° 💧 None 💨 7 mph H 97%29.91 inHg

6:00 AM

Overcast night

71° 💧 0.001 in 💨 7 mph H 96%29.94 inHg

9:00 AM

Overcast

73° 💧 0.008 in 💨 10 mph H 89%30.03 inHg

12:00 PM

Light rain

78° 💧 0.018 in 💨 9 mph H 73%30.03 inHg

3:00 PM

Light rain

82° 💧 0.039 in 💨 10 mph H 66%30.00 inHg

6:00 PM

Overcast

77° 💧 0.001 in 💨 14 mph H 76%30.03 inHg

9:00 PM

Mostly cloudy night

72° 💧 None 💨 12 mph H 77%30.06 inHg

Tomorrow

12:00 AM

Overcast night

70° 💧 None 💨 11 mph H 80%30.15 inHg

3:00 AM

Mostly cloudy night

71° 💧 0.000 in 💨 10 mph H 82%30.12 inHg

6:00 AM

Overcast night

71° 💧 None 💨 9 mph H 87%30.15 inHg

9:00 AM

Overcast

72° 💧 None 💨 11 mph H 84%30.21 inHg

12:00 PM

Overcast

79° 💧 0.002 in 💨 12 mph H 67%30.21 inHg

3:00 PM

Mostly cloudy

82° 💧 0.006 in 💨 11 mph H 57%30.18 inHg

6:00 PM

Sunny

83° 💧 None 💨 10 mph H 55%30.15 inHg

9:00 PM

Clear night

76° 💧 None 💨 6 mph H 69%30.18 inHg

Wednesday

12:00 AM

Clear night

73° 💧 None 💨 9 mph H 74%30.21 inHg

Today

3:00 AM

Mostly clear night

72° 💧 None 💨 7 mph H 97%29.91 inHg

4:00 AM

Partly cloudy night

71° 💧 None 💨 7 mph H 97%29.91 inHg

5:00 AM

Mostly cloudy night

71° 💧 None 💨 7 mph H 96%29.94 inHg

6:00 AM

Overcast night

71° 💧 None 💨 7 mph H 96%29.94 inHg

7:00 AM

Overcast night

71° 💧 0.000 in 💨 8 mph H 94%29.97 inHg

8:00 AM

Overcast

72° 💧 0.001 in 💨 8 mph H 91%30.00 inHg

9:00 AM

Overcast

73° 💧 0.003 in 💨 10 mph H 89%30.03 inHg

10:00 AM

Overcast

74° 💧 0.003 in 💨 9 mph H 84%30.03 inHg

11:00 AM

Overcast

76° 💧 0.002 in 💨 9 mph H 77%30.03 inHg

12:00 PM

Light rain

78° 💧 0.004 in 💨 9 mph H 73%30.03 inHg

1:00 PM

Mostly cloudy

79° 💧 0.002 in 💨 8 mph H 71%30.03 inHg

2:00 PM

Light rain

81° 💧 0.012 in 💨 8 mph H 66%30.00 inHg

3:00 PM

Light rain

82° 💧 0.016 in 💨 10 mph H 66%30.00 inHg

4:00 PM

Light rain

82° 💧 0.014 in 💨 10 mph H 66%29.97 inHg

5:00 PM

Light rain

80° 💧 0.009 in 💨 13 mph H 70%30.00 inHg

6:00 PM

Overcast

77° 💧 0.001 in 💨 14 mph H 76%30.03 inHg

7:00 PM

Overcast

75° 💧 0.000 in 💨 13 mph H 77%30.03 inHg

8:00 PM

Overcast night

73° 💧 None 💨 13 mph H 77%30.06 inHg

9:00 PM

Mostly cloudy night

72° 💧 None 💨 12 mph H 77%30.06 inHg

10:00 PM

Mostly cloudy night

71° 💧 None 💨 11 mph H 77%30.12 inHg

11:00 PM

Mostly cloudy night

71° 💧 None 💨 11 mph H 79%30.12 inHg

Tomorrow

12:00 AM

Overcast night

70° 💧 None 💨 11 mph H 80%30.15 inHg

1:00 AM

Mostly cloudy night

70° 💧 None 💨 10 mph H 82%30.15 inHg

2:00 AM

Overcast night

71° 💧 None 💨 10 mph H 81%30.15 inHg

3:00 AM

Mostly cloudy night

71° 💧 0.000 in 💨 10 mph H 82%30.12 inHg

4:00 AM

Overcast night

70° 💧 None 💨 9 mph H 86%30.12 inHg

5:00 AM

Overcast night

71° 💧 0.000 in 💨 9 mph H 86%30.15 inHg

6:00 AM

Overcast night

71° 💧 None 💨 9 mph H 87%30.15 inHg

7:00 AM

Overcast night

70° 💧 None 💨 9 mph H 88%30.18 inHg

8:00 AM

Overcast

71° 💧 None 💨 9 mph H 87%30.18 inHg

9:00 AM

Overcast

72° 💧 None 💨 11 mph H 84%30.21 inHg

10:00 AM

Mostly cloudy

72° 💧 None 💨 11 mph H 82%30.24 inHg

11:00 AM

Overcast

75° 💧 None 💨 12 mph H 74%30.24 inHg

12:00 PM

Overcast

79° 💧 0.002 in 💨 12 mph H 67%30.21 inHg

1:00 PM

Overcast

79° 💧 0.000 in 💨 12 mph H 63%30.21 inHg

2:00 PM

Overcast

81° 💧 None 💨 11 mph H 60%30.18 inHg

3:00 PM

Mostly cloudy

82° 💧 0.000 in 💨 11 mph H 57%30.18 inHg

4:00 PM

Mostly sunny

83° 💧 0.002 in 💨 11 mph H 57%30.15 inHg

5:00 PM

Mostly sunny

83° 💧 0.003 in 💨 11 mph H 55%30.15 inHg

6:00 PM

Sunny

83° 💧 None 💨 10 mph H 55%30.15 inHg

7:00 PM

Sunny

82° 💧 None 💨 7 mph H 58%30.15 inHg

8:00 PM

Clear night

78° 💧 None 💨 6 mph H 65%30.15 inHg

9:00 PM

Clear night

76° 💧 None 💨 6 mph H 69%30.18 inHg

10:00 PM

Clear night

75° 💧 None 💨 9 mph H 68%30.21 inHg

11:00 PM

Clear night

74° 💧 None 💨 10 mph H 71%30.21 inHg

Wednesday

12:00 AM

Clear night

73° 💧 None 💨 9 mph H 74%30.21 inHg

1:00 AM

Clear night

72° 💧 None 💨 9 mph H 76%30.21 inHg

2:00 AM

Mostly clear night

72° 💧 None 💨 9 mph H 78%30.21 inHg

3:00 AM

Mostly clear night

72° 💧 None 💨 9 mph H 80%30.21 inHg

4:00 AM

Clear night

71° 💧 None 💨 8 mph H 82%30.21 inHg

5:00 AM

Clear night

71° 💧 None 💨 7 mph H 85%30.21 inHg

6:00 AM

Mostly clear night

70° 💧 None 💨 7 mph H 88%30.21 inHg

7:00 AM

Mostly cloudy night

69° 💧 None 💨 7 mph H 91%30.21 inHg

8:00 AM

Overcast

70° 💧 None 💨 8 mph H 89%30.24 inHg

5:00 PM

Mostly sunny

86° 💧 None 💨 4 mph H 54%30.12 inHg

8:00 PM

Clear night

81° 💧 None 💨 4 mph H 66%30.09 inHg

11:00 PM

Partly cloudy night

78° 💧 None 💨 7 mph H 76%30.12 inHg

Thursday

2:00 AM

Clear night

74° 💧 None 💨 3 mph H 90%30.12 inHg

5:00 AM

Clear night

72° 💧 None 💨 3 mph H 96%30.09 inHg

8:00 AM

Overcast

72° 💧 None 💨 3 mph H 98%30.12 inHg

11:00 AM

Mostly cloudy

79° 💧 None 💨 1 mph H 78%30.12 inHg

2:00 PM

Mostly sunny

88° 💧 None 💨 1 mph H 55%30.03 inHg

5:00 PM

Partly cloudy

90° 💧 None 💨 3 mph H 50%29.91 inHg

8:00 PM

Light rain

81° 💧 None 💨 6 mph H 71%29.94 inHg

11:00 PM

Light rain

76° 💧 None 💨 1 mph H 87%29.97 inHg

Friday

2:00 AM

Clear night

74° 💧 None 💨 3 mph H 95%29.94 inHg

5:00 AM

Clear night

73° 💧 None 💨 4 mph H 99%29.94 inHg

8:00 AM

Mostly sunny

73° 💧 None 💨 5 mph H 98%29.97 inHg

11:00 AM

Mostly sunny

82° 💧 None 💨 2 mph H 71%29.97 inHg

2:00 PM

Mostly cloudy

89° 💧 None 💨 2 mph H 54%29.91 inHg

5:00 PM

Light thunderstorms

83° 💧 None 💨 6 mph H 68%29.85 inHg

8:00 PM

Overcast night

75° 💧 None 💨 4 mph H 97%29.91 inHg

11:00 PM

Partly cloudy night

74° 💧 None 💨 2 mph H 97%29.94 inHg

Saturday

2:00 AM

Light rain

71° 💧 None 💨 4 mph H 99%29.94 inHg

5:00 AM

Partly cloudy night

71° 💧 None 💨 1 mph H 98%29.94 inHg

8:00 AM

Light rain

71° 💧 None 💨 2 mph H 98%30.00 inHg

11:00 AM

Light rain

76° 💧 None 💨 4 mph H 85%30.03 inHg

2:00 PM

Mostly sunny

84° 💧 None 💨 3 mph H 68%29.97 inHg

8:00 PM

Mostly clear night

85° 💧 None 💨 0 mph H 66%29.97 inHg

Sunday

2:00 AM

Mostly clear night

79° 💧 None 💨 0 mph H 82%29.97 inHg

8:00 AM

Sunny

73° 💧 None 💨 2 mph H 96%30.03 inHg

2:00 PM

Overcast

72° 💧 None 💨 2 mph H 99%30.06 inHg

8:00 PM

Light rain

86° 💧 None 💨 2 mph H 64%30.06 inHg

Monday

2:00 AM

Mostly clear night

82° 💧 None 💨 2 mph H 77%30.03 inHg

8:00 AM

Mostly sunny

75° 💧 None 💨 3 mph H 90%30.09 inHg

2:00 PM

Mostly sunny

73° 💧 None 💨 4 mph H 95%30.15 inHg

8:00 PM

Mostly clear night

88° 💧 None 💨 3 mph H 56%30.06 inHg

Tuesday

2:00 AM

Mostly clear night

82° 💧 None 💨 3 mph H 68%30.03 inHg

8:00 AM

Sunny

76° 💧 None 💨 4 mph H 85%30.06 inHg

2:00 PM

Sunny

73° 💧 None 💨 5 mph H 94%30.15 inHg

8:00 PM

Overcast night

86° 💧 None 💨 4 mph H 63%30.15 inHg

Wednesday

2:00 AM

Mostly clear night

82° 💧 None 💨 2 mph H 76%30.09 inHg

8:00 AM

Mostly sunny

75° 💧 None 💨 5 mph H 89%30.18 inHg

2:00 PM

Sunny

73° 💧 None 💨 5 mph H 96%30.21 inHg

8:00 PM

Mostly clear night

88° 💧 None 💨 6 mph H 58%30.21 inHg

Thursday

2:00 AM

Mostly clear night

83° 💧 None 💨 2 mph H 70%30.15 inHg

8:00 AM

Sunny

75° 💧 None 💨 3 mph H 84%30.18 inHg

2:00 PM

Sunny

73° 💧 None 💨 2 mph H 91%30.21 inHg

8:00 PM

Clear night

90° 💧 None 💨 3 mph H 50%30.15 inHg

Friday

2:00 AM

Light rain

80° 💧 None 💨 4 mph H 77%30.09 inHg

8:00 AM

Sunny

75° 💧 None 💨 2 mph H 95%30.06 inHg

2:00 PM

Sunny

73° 💧 None 💨 5 mph H 92%30.03 inHg

8:00 PM

Mostly clear night

90° 💧 None 💨 9 mph H 46%29.94 inHg

Saturday

2:00 AM

Clear night

81° 💧 None 💨 9 mph H 35%29.85 inHg

8:00 AM

Sunny

69° 💧 None 💨 9 mph H 46%29.94 inHg

2:00 PM

Sunny

62° 💧 None 💨 8 mph H 58%29.97 inHg

8:00 PM

Partly cloudy night

78° 💧 None 💨 6 mph H 34%29.97 inHg

Sunday

2:00 AM

Clear night

70° 💧 None 💨 10 mph H 38%29.94 inHg

8:00 AM

Sunny

61° 💧 None 💨 10 mph H 40%30.06 inHg

2:00 PM

Sunny

57° 💧 None 💨 9 mph H 44%30.15 inHg

8:00 PM

Clear night

73° 💧 None 💨 9 mph H 28%30.12 inHg

Monday

2:00 AM

Clear night

69° 💧 None 💨 7 mph H 36%30.12 inHg

8:00 AM

Sunny

62° 💧 None 💨 6 mph H 55%30.15 inHg

2:00 PM

Mostly cloudy

64° 💧 None 💨 11 mph H 61%30.21 inHg

In Alpharetta and, more broadly, across the state of Georgia: This evening will feature mostly cloudy skies with hot temperatures ranging from 76 to 88 degrees Fahrenheit. There is a high likelihood of rain, with up to about 0.1 inches possible, especially in the late evening hours. Winds will be moderate from the northwest, blowing at around 12 mph, with gusts reaching up to 35 mph. Expect the weather to remain unsettled through the night, with the chance of rain continuing into the early morning hours. Temperatures are expected to remain relatively warm, making for a humid night. Be prepared for potentially gusty winds and brief rain showers if you plan to be outdoors.

15-Day Weather Outlook for Alpharetta

TomorrowTomorrow

Overcast 83°/70° 💧 None 💨 13 mph

Wednesday, Sep 9Wed Sep 9

Overcast 85°/69° 💧 0.466 in 💨 10 mph

Thursday, Sep 10Thu Sep 10

Light rain 84°/72° 💧 0.065 in 💨 6 mph

Friday, Sep 11Fri Sep 11

Light rain 84°/70° 💧 0.352 in 💨 5 mph

Saturday, Sep 12Sat Sep 12

Moderate rain 85°/70° 💧 0.156 in 💨 3 mph

Sunday, Sep 13Sun Sep 13

Light rain 86°/72° 💧 0.022 in 💨 2 mph

Monday, Sep 14Mon Sep 14

Mostly sunny 88°/73° 💧 0.040 in 💨 4 mph

Tuesday, Sep 15Tue Sep 15

Overcast 86°/73° 💧 0.007 in 💨 5 mph

Wednesday, Sep 16Wed Sep 16

Mostly sunny 88°/73° 💧 0.037 in 💨 6 mph

Thursday, Sep 17Thu Sep 17

Mostly sunny 90°/73° 💧 0.007 in 💨 3 mph

Friday, Sep 18Fri Sep 18

Light rain 90°/73° 💧 0.050 in 💨 9 mph

Saturday, Sep 19Sat Sep 19

Partly cloudy 81°/62° 💧 None 💨 9 mph

Sunday, Sep 20Sun Sep 20

Sunny 73°/57° 💧 None 💨 10 mph

Monday, Sep 21Mon Sep 21

Mostly cloudy 69°/62° 💧 None 💨 11 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Alpharetta

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Alpharetta

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 3:00 AM

PM2.5 Fine particles Good 6,8µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 8,4µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 34,6µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 1,7µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Alpharetta

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 5,8Moderate 😊Good

Tomorrow UV 8,4Very high 🙂Fair

Wednesday UV 8,5Very high 🙂Fair

Thursday UV 8,3Very high 🙂Fair

Friday UV 8,0Very high 😊Good

Saturday UV 8,0Very high —Unavailable

Sunday UV 8,0Very high —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,1 9:00 AMUV 0,6 10:00 AMUV 1,6 11:00 AMUV 3,0 12:00 PMUV 4,6 1:00 PMUV 4,7 2:00 PMUV 5,5 3:00 PMUV 5,8 4:00 PMUV 5,1 5:00 PMUV 2,0 6:00 PMUV 1,1

Today's weather health advice Open today's recommendations.

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Alpharetta

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · ALPHARETTA, GEORGIA

Tonight's Stargazing & Shooting Stars

Good observing conditions. Best local viewing window: 3:00 AM–4:00 AM.

77/100Best-hour score

BEST TIME TONIGHT 3:00 AM–4:00 AM Astronomical darkness: 9:22 PM–5:49 AM

☁ Cloud cover 25% Real hourly forecast for the best viewing hour.

☾ Moonlight 22% Waning Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 57° high at the best hour.

✦ Estimated visible meteors 1–3/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min66%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for Alpharetta were last refreshed today at 2:03 AM. The current forecast period extends through 09/09/2026 at 12:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.