January weather forecast
Ewa Beach, HI

Weather in January

January, like December, in Ewa Beach, Hawaii, is another warm winter month, with an average temperature fluctuating between 75.9°F (24.4°C) and 70.5°F (21.4°C).

Temperature

In January, the average high-temperature is almost the same as in December - a still warm 75.9°F (24.4°C). In January, the average low-temperature is 70.5°F (21.4°C).

Humidity

The months with the lowest humidity in Ewa Beach are January, April through June, August through November, with an average relative humidity of 74%.

Rainfall

In Ewa Beach, during January, the rain falls for 12.3 days and regularly aggregates up to 0.98" (25mm) of precipitation. In Ewa Beach, during the entire year, the rain falls for 172.2 days and collects up to 12.72" (323mm) of precipitation.

Ocean temperature

In Ewa Beach, the average seawater temperature in January is 76.8°F (24.9°C).
Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 76.8°F (24.9°C) water. (FYI: The Olympic swimming competition requires a water temperature between 77°F (25°C) and 82.4°F (28°C).)

Daylight

The average length of the day in January is 11h and 1min.
On the first day of January in Ewa Beach, sunrise is at 7:09 am and sunset at 6:01 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:21 pm HST.

Sunshine

In January, the average sunshine is 8.7h.

UV index

The months with the lowest UV index are January through May, October through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 6 in January interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the least humid month in Ewa Beach?

January, April through June, August through November, with an average relative humidity of 74%, are the least humid months in Ewa Beach.

What is the average humidity in January in Ewa Beach?

In Ewa Beach, the average relative humidity in January is 74%.

How many days does it rain in January in Ewa Beach?

In Ewa Beach, in January, during 12.3 rainfall days, 0.98" (25mm) of precipitation is typically accumulated.

What is the water temperature in January in Ewa Beach?

In Ewa Beach, the average seawater temperature in January is 76.8°F (24.9°C). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 76.8°F (24.9°C) water.

What is the average length of the day in January in Ewa Beach?

The average day length in January in Ewa Beach, Hawaii, is 11h and 1min.

When are sunrise and sunset in January in Ewa Beach?

On the first day of January in Ewa Beach, sunrise is at 7:09 am and sunset at 6:01 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:21 pm HST.

How long on average sun shines in January in Ewa Beach?

In Ewa Beach, the average sunshine duration in January is 8.7h.

When is the lowest UV index in Ewa Beach?

The months with the lowest UV index are January through May, October through December, with an average maximum UV index of 6.

What is the UV index reading in January in Ewa Beach?

In Ewa Beach, Hawaii, the average daily maximum UV index in January is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in January
Ewa Beach, HI

Average temperature in January - Ewa Beach, HI
  • Average high temperature in January: 24.4°C

The warmest months (with the highest average high temperature) are August and September (27.5°C).
The month with the lowest average high temperature is February (23.8°C).

  • Average low temperature in January: 21.4°C

The months with the highest average low temperature are August and September (24.6°C).
The coldest month (with the lowest average low temperature) is February (20.8°C).

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Average pressure in January
Ewa Beach, HI

Average pressure in January - Ewa Beach, HI
  • Average pressure in January: 1015.9mbar

The month with the highest atmospheric pressure is April (1017.7mbar).
The month with the lowest atmospheric pressure is October (1014.8mbar).

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Average wind speed in January
Ewa Beach, HI

Average wind speed in January - Ewa Beach, HI
  • Average wind speed in January: 14.6km/h

The windiest month (with the highest average wind speed) is July (19.2km/h).
The calmest month (with the lowest average wind speed) is January (14.6km/h).

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Average humidity in January
Ewa Beach, HI

Average humidity in January - Ewa Beach, HI
  • Average humidity in January: 74%

The month with the highest relative humidity is December (76%).
The months with the lowest relative humidity are January, April, May, June, August, September, October and November (74%).

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Average rainfall in January
Ewa Beach, HI

Average rainfall in January - Ewa Beach, HI
  • Average rainfall in January: 25mm

The wettest month (with the highest rainfall) is March (45mm).
The driest month (with the least rainfall) is July (11mm).

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Average rainfall days in January
Ewa Beach, HI

Average rainfall days in January - Ewa Beach, HI
  • Average rainfall days in January: 12.3 days

The month with the highest number of rainy days is March (18.1 days).
The month with the least rainy days is July (11.3 days).

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Average sea temperature in January
Ewa Beach, HI

Average sea temperature in January - Ewa Beach, HI
  • Average sea temperature in January: 24.9°C

The best month for swimming (with the highest average sea temperature) is September (27°C).
The coldest month (with the lowest average sea temperature) is March (24.3°C).

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Average daylight in January /
Average sunshine in January
Ewa Beach, HI

Average daylight in January / Average sunshine in January - Ewa Beach, HI
  • Average daylight in January: 11h and 1min

The month with the longest days is June (Average daylight: 13h and 25min).
The month with the shortest days is December (Average daylight: 10h and 52min).

  • Average sunshine in January: 8.7h

The month with the most sunshine is June (Average sunshine: 11h).
The month with the least sunshine is November (Average sunshine: 6.7h).

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Average sunshine days in January
Ewa Beach, HI

Average sunshine days in January - Ewa Beach, HI
  • Average sunshine days in January: 13.9 days

The months with the most sunshine days are July and August (15.3 days).
The month with the least sunshine days is March (6.8 days).

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Average UV index in January
Ewa Beach, HI

Average UV index in January - Ewa Beach, HI
  • Average UV index in January: 6

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

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Average cloud cover in January
Ewa Beach, HI

Average cloud cover in January - Ewa Beach, HI
  • Average cloud cover in January: 31

The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is September (Cloud cover 30).

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Average visibility in January
Ewa Beach, HI

Average visibility in January - Ewa Beach, HI
  • Average visibility in January: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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