August weather forecastSaint John Harbor, AK
August
Weather in August
The last month of the summer, August, is another refreshing month in Saint John Harbor, Alaska, with an average temperature fluctuating between 50°F (10°C) and 59°F (15°C).Temperature
Saint John Harbor notes an average high-temperature of a still refreshing 59°F (15°C) in August, hardly diverging from July. Throughout August, Saint John Harbor reports a steady low-temperature average of 50°F (10°C), slightly lower than its daytime counterpart.Humidity
The months with the highest humidity are January and August, with an average relative humidity of 86%.Rainfall
In Saint John Harbor, in August, during 17.7 rainfall days, 5.55" (141mm) of precipitation is typically accumulated. In Saint John Harbor, during the entire year, the rain falls for 197.9 days and collects up to 53.03" (1347mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Saint John Harbor, the average length of the day in August is 15h and 3min.On the first day of the month, sunrise is at 4:55 am and sunset at 9:00 pm. On the last day of August, in Saint John Harbor, sunrise is at 5:55 am and sunset at 7:48 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 moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In August, the maximum UV index of 4 translates into these guidelines:
Ensure safety - Recommendations to avert sunburn are presented. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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 daylight in August /
Average sunshine in August
Saint John Harbor, AK
- Average daylight in August: 15h and 6min
The month with the longest days is June (Average daylight: 17h and 36min).
The month with the shortest days is December (Average daylight: 7h and 0min).
- 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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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).
