Waimalu
Hawaii, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Waimalu, HI

January, the same as December, is a moderately hot winter month in Waimalu, Hawaii, with average temperature fluctuating between 75.7°F (24.3°C) and 69.1°F (20.6°C).

Temperature

In January, the average high-temperature is essentially the same as in December - a still moderately hot 75.7°F (24.3°C). The average low-temperature, in January, is 69.1°F (20.6°C).

Humidity

The average relative humidity in Waimalu, Hawaii, is 75%.

Rainfall

In Waimalu, during January, the rain falls for 13.5 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Waimalu, Hawaii, during the entire year, the rain falls for 208.4 days and collects up to 16.5" (419mm) of precipitation.

Ocean temperature

January through April, with an average ocean temperature of 75.2°F (24°C), are months with the coldest seawater.
Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 75.2°F (24°C) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 77°F (25°C) to 82.4°F (28°C).)

Daylight

In January, the average length of the day in Waimalu is 11h.

Sunshine

The average sunshine in Waimalu is 8.2h.

UV index

Months with the lowest UV index in Waimalu are January through August, October through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 6 in January transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in January in Waimalu?

The average high-temperature, in January, is 75.7°F (24.3°C), while the average low-temperature is 69.1°F (20.6°C).

What is the average humidity in January in Waimalu?

In Waimalu, Hawaii, the average relative humidity in January is 75%.

How much does it rain in Waimalu in January?

In January, in Waimalu, the rain falls for 13.5 days. Throughout January, 1.1" (28mm) of precipitation is accumulated.

What months are the ocean coldest in Waimalu?

Through and April, with an average ocean temperature of 75.2°F (24°C).

What is the ocean temperature in January in Waimalu?

In Waimalu, Hawaii, in January, the average water temperature is 75.2°F (24°C). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 75.2°F (24°C) water.

What is the average length of the day in January in Waimalu?

In Waimalu, Hawaii, the average length of the day in January is 11h.

How many hours of sunshine does Waimalu have in January?

In January, the average sunshine in Waimalu is 8.2h.

When is the lowest UV index in Waimalu?

Months with the lowest UV index are January through August, October through December, with an average maximum UV index of 6.

What is the UV index intensity in January in Waimalu?

In Waimalu, the average daily maximum UV index in January is 6. A UV Index value of 6 to 7 symbolizes a high health threat from the exposure to the Sun's UV radiation.
Average temperature in January - Waimalu, HI
  • Average high temperature in January: 75.7°F

The warmest months (with the highest average high temperature) are August and September (82°F).
Months with the lowest average high temperature are February and March (75.4°F).

  • Average low temperature in January: 69.1°F

The month with the highest average low temperature is September (75°F).
The coldest month (with the lowest average low temperature) is February (68°F).

Average humidity in January - Waimalu, HI
  • Average humidity in January: 75%

Months with the highest relative humidity are February and December (76%).
Months with the lowest relative humidity are April, May, June and September (74%).

Average rainfall in January - Waimalu, HI
  • Average rainfall in January: 1.1"

The wettest month (with the highest rainfall) is October (2.09").
The driest month (with the least rainfall) is July (0.71").

Average rainfall days in January - Waimalu, HI
  • Average rainfall days in January: 13.5 days

The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is January (13.5 days).

Average sea temperature in January - Waimalu, HI
  • Average sea temperature in January: 75°F

The best months for swimming (with the highest average sea temperature) are August, September and October (81°F).
The coldest months (with the lowest average sea temperature) are January, February, March and April (75°F).

Average daylight in January / Average sunshine in January - Waimalu, HI
  • Average daylight in January: 11h

The month with the longest days is June (Average daylight: 13.4h).
The month with the shortest days is December (Average daylight: 10.8h).

  • Average sunshine in January: 8.2h

The month with the most sunshine is June (Average sunshine: 9.9h).
Months with the least sunshine are November and December (Average sunshine: 6.3).

Average UV index in January - Waimalu, HI
  • Average UV index in January: 6

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).