August weather forecast
Alpharetta, GA

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Weather in August

August weather in Alpharetta is largely similar to July, featuring high temperatures and significant rain showers. As the month progresses, there's a slight dip in temperature, suggestive of upcoming autumn. Though rainfall slightly exceeds that of July, the overall percentage of cloud cover decreases, promising brighter days. The wind gusts remain low, maintaining calmness in the atmosphere. The consistently high amounts of rainfall mark the August climatic conditions as notably humid.

Temperature

Alpharetta registers an average high-temperature of a still hot 88.7°F (31.5°C) at the commencement of August, closely related to the preceding month. The nighttime temperature dips to an agreeable 70°F (21.1°C) on average during August.

Heat index

In August, the average heat index is estimated at a very hot 102.2°F (39°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are extremely significant for children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

July and August, with an average relative humidity of 69%, are the least humid months in Alpharetta.

Rainfall

The month with the most rainfall in Alpharetta is August, when the rain falls for 18.1 days and typically aggregates up to 3.58" (91mm) of precipitation.

Snowfall

In Alpharetta, snow does not fall in April through October.

Daylight

In August, the average length of the day in Alpharetta is 13h and 23min.
On the first day of the month, sunrise is at 6:49 am and sunset at 8:37 pm. On the last day of August, in Alpharetta, Georgia, sunrise is at 7:10 am and sunset at 8:03 pm EDT.

Sunshine

In August, the average sunshine is 9.5h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: A maximum UV index of 6 in August translates into the following recommendations:
Deter overexposure. Protecting against the sun's effects is essential. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in Alpharetta in August?

The high-temperature in Alpharetta, Georgia, during August is 88.7°F (31.5°C) and the low-temperature is 70°F (21.1°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is estimated at 102.2°F (39°C).

What is the least humid month in Alpharetta?

The months with the lowest humidity are July and August, with an average relative humidity of 69%.

What is the average humidity in August in Alpharetta?

The average relative humidity in August in Alpharetta is 69%.

What is the wettest month in Alpharetta?

August is the month with the most rainfall in Alpharetta, Georgia. Rain falls for 18.1 days and accumulates 3.58" (91mm) of precipitation.

How much does it rain in Alpharetta in August?

In Alpharetta, Georgia, during August, the rain falls for 18.1 days and regularly aggregates up to 3.58" (91mm) of precipitation.

When it does not snow in Alpharetta?

April through October are months without snowfall in Alpharetta.

How many hours of daylight does Alpharetta have in August?

In August, the average day length in Alpharetta, Georgia, is 13h and 23min.

When are sunrise and sunset in August in Alpharetta?

In August, on the first day of the month, sunrise is at 6:49 am and sunset at 8:37 pm. On the last day of the month, in Alpharetta, Georgia, sunrise is at 7:10 am and sunset at 8:03 pm EDT.

How many hours of sunshine does Alpharetta have in August?

In Alpharetta, Georgia, the average sunshine duration in August is 9.5h.

What are the months with the highest UV index in Alpharetta?

The months with the highest UV index are May through August, with an average maximum UV index of 6.

How high is the UV index in August in Alpharetta?

In Alpharetta, Georgia, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to Sun's UV rays.
Average max. wind speed
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Alpharetta, GA

Average temperature in August - Alpharetta, GA
  • Average high temperature in August: 88.7°F

The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (49.1°F).

  • Average low temperature in August: 70°F

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (33.6°F).

Average pressure in August
Alpharetta, GA

Average pressure in August - Alpharetta, GA
  • Average pressure in August: 30.01"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

Average wind speed in August
Alpharetta, GA

Average wind speed in August - Alpharetta, GA
  • Average wind speed in August: 4.5mph

The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

Average humidity in August
Alpharetta, GA

Average humidity in August - Alpharetta, GA
  • Average humidity in August: 69%

The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are July and August (69%).

Average rainfall in August
Alpharetta, GA

Average rainfall in August - Alpharetta, GA
  • Average rainfall in August: 3.58"

The wettest month (with the highest rainfall) is August (3.58").
The driest month (with the least rainfall) is October (1.34").

Average rainfall days in August
Alpharetta, GA

Average rainfall days in August - Alpharetta, GA
  • Average rainfall days in August: 18.1 days

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is October (9 days).

Average snowfall in August
Alpharetta, GA

Average snowfall in August - Alpharetta, GA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (0.71").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in August
Alpharetta, GA

Average snowfall days in August - Alpharetta, GA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (1.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in August /
Average sunshine in August
Alpharetta, GA

Average daylight in August / Average sunshine in August - Alpharetta, GA
  • Average daylight in August: 13h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in August: 9h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

Average sunshine days in August
Alpharetta, GA

Average sunshine days in August - Alpharetta, GA
  • Average sunshine days in August: 10.8 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (10.1 days).

Average UV index in August
Alpharetta, GA

Average UV index in August - Alpharetta, GA
  • Average UV index in August: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).

Average cloud cover in August
Alpharetta, GA

Average cloud cover in August - Alpharetta, GA
  • Average cloud cover in August: 32

The months with the most cloud cover are February and December (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in August
Alpharetta, GA

Average visibility in August - Alpharetta, GA
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Alpharetta, Georgia, USA

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