August weather forecastHaiku, HI
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Haiku, Hawaii, with an average temperature ranging between min 75.7°F (24.3°C) and max 78.6°F (25.9°C).Temperature
The advent of August reveals an average high-temperature of a still moderately hot 78.6°F (25.9°C), showing minimal difference from the prior month. Haiku experiences a steady nighttime temperature of 75.7°F (24.3°C) throughout the month of August.Humidity
The months with the highest humidity are July and August, with an average relative humidity of 78%.Rainfall
In August, the rain falls for 10.8 days. Throughout August, 0.59" (15mm) of precipitation is accumulated. In Haiku, during the entire year, the rain falls for 136.7 days and collects up to 13.94" (354mm) of precipitation.Snowfall
January through August, October through December are months without snowfall.Daylight
In August, the average length of the day is 12h and 49min.On the first day of the month, sunrise is at 5:59 am and sunset at 7:03 pm. On the last day of August, sunrise is at 6:09 am and sunset at 6:41 pm HST.
Sunshine
In Haiku, the average sunshine in August is 9.2h.UV index
January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in August interprets into the following recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Haiku, HI
- Average high temperature in August: 78.6°F
The warmest month (with the highest average high temperature) is September (79°F).
The month with the lowest average high temperature is March (72.9°F).
- Average low temperature in August: 75.7°F
The month with the highest average low temperature is September (76.1°F).
The coldest month (with the lowest average low temperature) is March (69.8°F).
Average pressure in August
Haiku, HI
- Average pressure in August: 29.99"Hg
The month with the highest atmospheric pressure is April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in August
Haiku, HI
- Average wind speed in August: 14.1mph
The windiest month (with the highest average wind speed) is June (14.4mph).
The calmest month (with the lowest average wind speed) is January (10.9mph).
Average humidity in August
Haiku, HI
- Average humidity in August: 78%
The months with the highest relative humidity are July and August (78%).
The months with the lowest relative humidity are January and February (76%).
Average rainfall in August
Haiku, HI
- Average rainfall in August: 0.59"
The wettest month (with the highest rainfall) is October (2.17").
The driest month (with the least rainfall) is September (0.43").
Average rainfall days in August
Haiku, HI
- Average rainfall days in August: 10.8 days
The month with the highest number of rainy days is March (14.1 days).
The month with the least rainy days is September (8.1 days).
Average snowfall days in August
Haiku, HI
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).
Average daylight in August /
Average sunshine in August
Haiku, HI
- Average daylight in August: 12h and 48min
The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in August: 9h and 12min
The months with the most sunshine are June and July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in August
Haiku, HI
- Average sunshine days in August: 13.2 days
The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is November (11.2 days).
Average UV index in August
Haiku, HI
- Average UV index in August: 6
The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).
Average cloud cover in August
Haiku, HI
- Average cloud cover in August: 26
The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is September (Cloud cover 23).
Average visibility in August
Haiku, 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).
