August weather forecastPetersburg, AK
August
Weather in August
August witnesses a continuation of summer with increased rainfall punctuating the sunny days in Petersburg. Temperatures plateau in the warm range, marking it one of the hottest months. High sea temperatures and extended daylight hours call for outdoor activities and exploration. However, by the end of August, the city starts preparing for the onset of autumn. With August, the last vestiges of summer can be noted, and a swift shift towards cooler weather is on the horizon.Temperature
Petersburg observes a minor difference in average high-temperatures between July's 59.7°F (15.4°C) and August's 59°F (15°C). Throughout August, Petersburg records a steady low-temperature average of 50°F (10°C), a minor decrease from its daytime counterpart.Humidity
The months with the highest humidity are January and August, with an average relative humidity of 86%.Rainfall
In Petersburg, in August, during 17.7 rainfall days, 5.55" (141mm) of precipitation is typically accumulated. Throughout the year, there are 197.9 rainfall days, and 53.03" (1347mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Ocean temperature
August is the month with the warmest seawater, with an average ocean temperature of 54.1°F (12.3°C).Note: With the appropriate swimsuit, one can swim in 54.1°F (12.3°C) even if temperatures dip below 50°F (10°C); otherwise, be ready for cold shock and breath issues. A fleeting swim around 55.4°F (13°C) is distressing.
Daylight
In August, the average length of the day is 15h and 5min.On the first day of the month, sunrise is at 4:53 am and sunset at 9:02 pm. On the last day of August, sunrise is at 5:54 am and sunset at 7:49 pm AKDT.
Sunshine
In August, the average sunshine is 6.9h.UV index
The months with the highest UV index are July and August, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: An average maximum UV index of 4 in August leads to these recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Petersburg, AK
- Average high temperature in August: 59°F
The warmest month (with the highest average high temperature) is July (59.7°F).
The month with the lowest average high temperature is December (32.4°F).
- Average low temperature in August: 50°F
The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is February (25.9°F).
Average pressure in August
Petersburg, AK
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is July (30.05"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).
Average wind speed in August
Petersburg, AK
- Average wind speed in August: 4.3mph
The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest month (with the lowest average wind speed) is July (3.9mph).
Average humidity in August
Petersburg, AK
- Average humidity in August: 86%
The months with the highest relative humidity are January and August (86%).
The month with the lowest relative humidity is May (81%).
Average rainfall in August
Petersburg, AK
- Average rainfall in August: 5.55"
The wettest month (with the highest rainfall) is October (6.3").
The driest month (with the least rainfall) is May (2.01").
Average rainfall days in August
Petersburg, AK
- Average rainfall days in August: 17.7 days
The month with the highest number of rainy days is October (20.1 days).
The month with the least rainy days is February (9.5 days).
Average snowfall in August
Petersburg, AK
- Average snowfall in August: 0"
The month with the highest snowfall is March (13.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Petersburg, AK
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is March (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in August
Petersburg, AK
- Average sea temperature in August: 54.2°F
The best month for swimming (with the highest average sea temperature) is August (54.2°F).
The coldest month (with the lowest average sea temperature) is March (41°F).
Average daylight in August /
Average sunshine in August
Petersburg, AK
- Average daylight in August: 15h and 6min
The month with the longest days is June (Average daylight: 17h and 42min).
The month with the shortest days is December (Average daylight: 6h and 54min).
- Average sunshine in August: 6h and 54min
The month with the most sunshine is May (Average sunshine: 7h and 24min).
The months with the least sunshine are January and November (Average sunshine: 3h and 24min).
Average sunshine days in August
Petersburg, AK
- Average sunshine days in August: 12.3 days
The month with the most sunshine days is December (12.5 days).
The month with the least sunshine days is November (8 days).
Average UV index in August
Petersburg, AK
- Average UV index in August: 4
The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover in August
Petersburg, AK
- Average cloud cover in August: 57
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are February and May (Cloud cover 54).
Average visibility in August
Petersburg, AK
- Average visibility in August: 5mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
