August weather forecastAnchorage, AK
August
Weather in August
August manifests a change in Anchorage's weather, signaling the gradual retreat of the intense summer heat. The city witnesses a dip in temperature compared to July but still hovers within the comfortable range. As August progresses, the hours of daylight start to reduce, indicating the approach of autumn. Despite a higher amount of rainfall, visibility remains excellent, allowing locals and tourists to enjoy the city and its surroundings. As mild winds begin to blow, they carry the first hints of the upcoming fall season.Temperature
August's arrival brings an average high-temperature of a still refreshing 59.5°F (15.3°C), slightly deviating from July's 61.9°F (16.6°C). In Anchorage, August nights witness a steady temperature drop to a cool 50°F (10°C).Humidity
In Anchorage, the average relative humidity in August is 78%.Rainfall
In Anchorage, during August, the rain falls for 17.9 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, there are 139.9 rainfall days, and 12.6" (320mm) of precipitation is accumulated.Snowfall
June through August are months without snowfall.Ocean temperature
With an average ocean temperature of 53.1°F (11.7°C), August is the month with the warmest seawater.Note: Immersing oneself in 53.1°F (11.7°C) at sub14°F (-10°C) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped.
Daylight
In Anchorage, the average length of the day in August is 15h and 43min.On the first day of August, sunrise is at 5:34 am and sunset at 10:37 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 9:07 pm AKDT.
Sunshine
The average sunshine in August in Anchorage is 9.9h.UV index
In Anchorage, the average daily maximum UV index in August is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: An average UV index of 3 in August transforms into this advice:
Undertake precautions - It is suggested to shield oneself from sunburn. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Anchorage, AK
- Average high temperature in August: 59.5°F
The warmest month (with the highest average high temperature) is July (61.9°F).
The month with the lowest average high temperature is January (20.3°F).
- Average low temperature in August: 50°F
The month with the highest average low temperature is July (51.3°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in August
Anchorage, AK
- Average pressure in August: 29.86"Hg
The month with the highest atmospheric pressure is July (29.96"Hg).
The months with the lowest atmospheric pressure are November and December (29.67"Hg).
Average wind speed in August
Anchorage, AK
- Average wind speed in August: 4.7mph
The windiest month (with the highest average wind speed) is November (6.3mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).
Average humidity in August
Anchorage, AK
- Average humidity in August: 78%
The months with the highest relative humidity are January, February and March (86%).
The month with the lowest relative humidity is May (68%).
Average rainfall in August
Anchorage, AK
- Average rainfall in August: 1.57"
The wettest month (with the highest rainfall) is September (1.93").
The driest month (with the least rainfall) is May (0.55").
Average rainfall days in August
Anchorage, AK
- Average rainfall days in August: 17.9 days
The month with the highest number of rainy days is August (17.9 days).
The month with the least rainy days is February (7 days).
Average snowfall in August
Anchorage, AK
- Average snowfall in August: 0"
The month with the highest snowfall is December (5.51").
The months with the least snowfall are June, July and August (0").
Average snowfall days in August
Anchorage, AK
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is December (11.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average sea temperature in August
Anchorage, AK
- Average sea temperature in August: 53.1°F
The best month for swimming (with the highest average sea temperature) is August (53.1°F).
The coldest month (with the lowest average sea temperature) is February (35.8°F).
Average daylight in August /
Average sunshine in August
Anchorage, AK
- Average daylight in August: 15h and 42min
The month with the longest days is June (Average daylight: 19h and 12min).
The month with the shortest days is December (Average daylight: 5h and 36min).
- Average sunshine in August: 9h and 54min
The months with the most sunshine are May and June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).
Average sunshine days in August
Anchorage, AK
- Average sunshine days in August: 11.4 days
The month with the most sunshine days is January (16.9 days).
The month with the least sunshine days is September (11.1 days).
Average UV index in August
Anchorage, AK
- Average UV index in August: 3
The months with the highest UV index are June and July (UV index 4).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in August
Anchorage, AK
- Average cloud cover in August: 45
The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is May (Cloud cover 38).
Average visibility in August
Anchorage, AK
- Average visibility in August: 6mi
The months with the highest visibility are January, February, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is March (5mi).
