Haiku, HI weather in August: average temperature & climate

Historical temperature average in August

In Haiku, Hawaii, United States

80°F

highs

76°F

lows

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General weather summary

Pleasantly warm and breezy

Feels like

15%

Chance of rain

0.116 in

Amount

17.5 mph

Wind speed

78%

Humidity

12.8 hrs

Daylight length

6:03 AM

Sunrise

6:53 PM

Sunset

66%

Cloud cover

Sleeveless shirt

What to wear

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What is the average temperature in August

The average temperature in Haiku in August for a typical day ranges from a high of 80°F (27°C) to a low of 76°F (24°C). Some would describe it as pleasantly warm and breezy.

For comparison, the hottest month in Haiku, September, has days with highs of 80°F (27°C) and lows of 76°F (24°C). The coldest month, March has days with highs of 74°F (24°C) and lows of 70°F (21°C). This graph shows how an average day looks like in Haiku in August based on historical data.

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Highs and lows in Haiku in Aug

How much does it rain in August

In Haiku in August, there's a 15% chance of rain on an average day. And on the average day it rains or snows, we get 0.76 in (19.3 mm) of precipitation. In more common terms of how much that is, some would describe it as heavy rain.

The wettest month in Haiku is December where a typical day has a 19% chance of precipitation and gets 0.10 inches (2.5 mm) of precipitation, while the dryest month in Haiku is June where a typical day has a 9% chance of precipitation and gets 0.12 inches (3.1 mm) of precipitation. These graphs show the probability of it raining/snowing in August and the amount of rainfall.

Chance of rain or snow on an average Haiku day by month

Average precipitation by hour of day

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How cloudy is Haiku in August

The average amount of time that the sky is clear or sunny (partly cloudy or less) in Haiku during August is 15.8 hours (66% of the day). For comparison, the month with the most clear, sunny days in Haiku is January with an average of 16.8 hours per day while October has the shortest amount of cloud-free hours with only 12.5 hours per day. This graph shows the average amount of sunshine in Haiku in August based on historical data.

Monthly clear skies percent of time in Haiku

When is sunrise and sunset in August

The average day in Haiku during August has 12.8 hours of daylight, with sunrise at 6:03 AM and sunset at 6:53 PM.

The day with the longest amount of daylight in Haiku is June 17th with 13.4 hours while December 19th has the shortest amount of daylight with only 10.9 hours.

This graph shows the average amount of daylight in Haiku in August based on historical data.

Average hours of daylight in Haiku by month

How humid is it in August

In August, Haiku is moderately humid with an average amount of 78% (relative humidity), which could be described as humid but cool. July has the highest relative humidity at 78% and is the least humid in January at 75%. This graph shows the average amount of humidity in Haiku throughout August based on historical data.

Average relative humidity in Haiku by month

How windy is it in August

Historically, the wind in Haiku during August blows at an average speed of 17.5 mph (28.1 kph). The windiest month is June with an average wind speed of 17.9 mph (28.8 kph), while the calmest month is January with an average wind speed of 13.2 mph (21.2 kph). This graph shows the average wind speed in Haiku in August based on historical data.

Average monthly wind speed in Haiku

What to wear in August

With an average high of 80°F (27°C) and a low of 76°F (24°C), it generally feels pleasantly warm and breezy. With that in mind, most people would dress in something very light like a sleeveless shirt

I'll never travel to Haiku without this trip planner again

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I will never travel to Haiku without this app again

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What's the weather like in Haiku the rest of the year

We've collected the weather data for Haiku during all other months of the year too:

Where does this data come from

Weather data for Haiku was collected from the MERRA-2 project from NASA, which used a climate model combined with historical data from weather stations around the world to estimate what the conditions were like for every point on the Earth.

For all data based on historical data, we've averaged the data from the past 11 years (2010-2020). For example, for the hourly temperature at 10am, we've looked at the temperature at 10am on every day in August (e.g., August 1, August 2, etc. in 2010, 2011, etc.) and took the arithmetic mean. We did not smooth the data, so for example, our daily temperature line will have some randomness due to the fact that weather is random in the first place.

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