September weather forecast
Kalihiwai, HI

Weather in September

September, the first month of the autumn, in Kalihiwai, is still a warm month, with average temperature fluctuating between 79.7°F (26.5°C) and 75.9°F (24.4°C).

Temperature

With an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 75.9°F (24.4°C), September is the warmest month.

Humidity

The average relative humidity in Kalihiwai, Hawaii, is 76%.

Rainfall

In September, the rain falls for 18.7 days. Throughout September, 1.54" (39mm) of precipitation is accumulated. In Kalihiwai, during the entire year, the rain falls for 218.4 days and collects up to 22.13" (562mm) of precipitation.

Daylight

In Kalihiwai, the average length of the day in September is 12.3h.

Sunshine

The average sunshine in Kalihiwai is 8.7h.

UV index

September is the month with the highest UV index in Kalihiwai, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the warmest month in Kalihiwai?

The warmest month is September, with an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 75.9°F (24.4°C).

What is the average humidity in September in Kalihiwai?

In Kalihiwai, Hawaii, the average relative humidity in September is 76%.

How many days does it rain in September in Kalihiwai?

In Kalihiwai, Hawaii, in September, during 18.7 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

What is the average length of the day in September in Kalihiwai?

In Kalihiwai, Hawaii, the average length of the day in September is 12.3h.

How long on average sun shines in September in Kalihiwai?

The average sunshine in September in Kalihiwai, Hawaii, is 8.7h.

When is the highest UV index in Kalihiwai?

With an average maximum UV index of 7, September is the month with the highest UV index in Kalihiwai.

What is the UV index reading in September in Kalihiwai?

In September, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV radiation.

Average temperature in September
Kalihiwai, HI

Average temperature in September - Kalihiwai, HI
  • Average high temperature in September: 79.7°F

The warmest month (with the highest average high temperature) is September (79.7°F).
Months with the lowest average high temperature are February and March (73.2°F).

  • Average low temperature in September: 75.9°F

The month with the highest average low temperature is September (75.9°F).
The coldest month (with the lowest average low temperature) is February (68.5°F).

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Average pressure in September
Kalihiwai, HI

Average pressure in September - Kalihiwai, HI
  • Average pressure in September: 29.98"

The month with the highest atmospheric pressure is April (30.07").
Months with the lowest atmospheric pressure are September and October (29.98").

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Average wind speed in September
Kalihiwai, HI

Average wind speed in September - Kalihiwai, HI
  • Average wind speed in September: 11.1mph

The windiest month (with the highest average wind speed) is July (12.3mph).
The calmest month (with the lowest average wind speed) is January (10mph).

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Average humidity in September
Kalihiwai, HI

Average humidity in September - Kalihiwai, HI
  • Average humidity in September: 76%

Months with the highest relative humidity are June, July, August, October and December (77%).
The month with the lowest relative humidity is January (75%).

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Average rainfall in September
Kalihiwai, HI

Average rainfall in September - Kalihiwai, HI
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is March (2.52").
The driest month (with the least rainfall) is April (1.3").

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Average rainfall days in September
Kalihiwai, HI

Average rainfall days in September - Kalihiwai, HI
  • Average rainfall days in September: 18.7 days

The month with the highest number of rainy days is August (21.1 days).
The month with the least rainy days is January (12.5 days).

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Average daylight in September /
Average sunshine in September
Kalihiwai, HI

Average daylight in September / Average sunshine in September - Kalihiwai, HI
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.5h).
The month with the shortest days is December (Average daylight: 10.8h).

  • Average sunshine in September: 8.7h

The month with the most sunshine is June (Average sunshine: 9.7h).
The month with the least sunshine is November (Average sunshine: 6.2h).

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Average sunshine days in September
Kalihiwai, HI

Average sunshine days in September - Kalihiwai, HI
  • Average sunshine days in September: 5.3 days

The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is August (2.9 days).

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Average UV index in September
Kalihiwai, HI

Average UV index in September - Kalihiwai, HI
  • Average UV index in September: 7

The month with the highest UV index is September (UV index 7).
Months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).

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Average cloud cover in September
Kalihiwai, HI

Average cloud cover in September - Kalihiwai, HI
  • Average cloud cover in September: 38

The month with the most cloud cover is March (Cloud cover 47).
Months with the least cloud cover are January and September (Cloud cover 38).

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Average visibility in September
Kalihiwai, HI

Average visibility in September - Kalihiwai, HI
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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