August weather forecastCaptain Cook, HI
August
Weather in August
August, the last month of the summer in Captain Cook, is another pleasant month, with an average temperature fluctuating between 69.1°F (20.6°C) and 73.2°F (22.9°C).Temperature
During August and October, Captain Cook registers its highest temperatures, averaging a high of 73.2°F (22.9°C).Humidity
June through September, with an average relative humidity of 81%, are the most humid months.Rainfall
In Captain Cook, during August, the rain falls for 21.8 days and regularly aggregates up to 1.73" (44mm) of precipitation. Throughout the year, there are 216.1 rainfall days, and 16.57" (421mm) of precipitation is accumulated.Daylight
The average length of the day in August is 12h and 46min.On the first day of August, sunrise is at 6:00 am and sunset at 6:59 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 6:39 pm HST.
Sunshine
In August, the average sunshine is 8.7h.UV index
The months with the highest UV index are May through October, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In August, the maximum UV index of 6 suggests these recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Captain Cook, HI
- Average high temperature in August: 73.2°F
The warmest months (with the highest average high temperature) are August and October (73.2°F).
The month with the lowest average high temperature is February (68.9°F).
- Average low temperature in August: 69.1°F
The month with the highest average low temperature is October (70°F).
The coldest month (with the lowest average low temperature) is March (64.8°F).
Average pressure in August
Captain Cook, HI
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is April (30.04"Hg).
The months with the lowest atmospheric pressure are September and October (29.96"Hg).
Average wind speed in August
Captain Cook, HI
- Average wind speed in August: 6.1mph
The windiest month (with the highest average wind speed) is May (6.3mph).
The calmest month (with the lowest average wind speed) is December (5.3mph).
Average humidity in August
Captain Cook, HI
- Average humidity in August: 81%
The months with the highest relative humidity are June, July, August and September (81%).
The month with the lowest relative humidity is February (73%).
Average rainfall in August
Captain Cook, HI
- Average rainfall in August: 1.73"
The wettest month (with the highest rainfall) is September (1.81").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in August
Captain Cook, HI
- Average rainfall days in August: 21.8 days
The month with the highest number of rainy days is August (21.8 days).
The month with the least rainy days is January (10.8 days).
Average daylight in August /
Average sunshine in August
Captain Cook, HI
- Average daylight in August: 12h and 48min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in August: 8h and 42min
The month with the most sunshine is May (Average sunshine: 10h and 42min).
The months with the least sunshine are November and December (Average sunshine: 7h and 18min).
Average sunshine days in August
Captain Cook, HI
- Average sunshine days in August: 4 days
The month with the most sunshine days is January (12.7 days).
The month with the least sunshine days is May (3.2 days).
Average UV index in August
Captain Cook, HI
- Average UV index in August: 6
The months with the highest UV index are May, June, July, August, September and October (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 5).
Average cloud cover in August
Captain Cook, HI
- Average cloud cover in August: 28
The month with the most cloud cover is June (Cloud cover 31).
The month with the least cloud cover is January (Cloud cover 15).
Average visibility in August
Captain Cook, HI
- 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).
