January weather forecast
Honolulu, HI

Waikiki beach with clear calm waters on the foot of Honolulu city, Hawaii, with the vast cityscape and mountains in the distance
Waikiki beach with clear calm waters on the foot of Honolulu city, Hawaii, with the vast cityscape and mountains in the distance

Weather in January

January, like December, in Honolulu, Hawaii, is a moderately hot winter month, with temperature in the range of an average low of 70°F (21.1°C) and an average high of 75.7°F (24.3°C).

Temperature

In Honolulu, the average high-temperature in January is practically the same as in December - a still moderately hot 75.7°F (24.3°C). The average low-temperature, in Honolulu, is 70°F (21.1°C).

Humidity

In January, the average relative humidity is 75%.

Rainfall

In Honolulu, during January, the rain falls for 12.6 days and regularly aggregates up to 0.98" (25mm) of precipitation. Throughout the year, there are 197.2 rainfall days, and 14.61" (371mm) of precipitation is accumulated.

Ocean temperature

In January, the average ocean temperature in Honolulu is 76.6°F (24.8°C).
Note: For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 76.6°F (24.8°C).

Daylight

The average length of the day in January is 11h and 1min.
On the first day of the month, sunrise is at 7:09 am and sunset at 6:01 pm. On the last day of January, in Honolulu, sunrise is at 7:08 am and sunset at 6:20 pm HST.

Sunshine

In January, the average sunshine in Honolulu, Hawaii, is 8.5h.

UV index

The months with the lowest UV index are January through June, October through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 6 in January interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in January in Honolulu?

The average high-temperature, in January, is 75.7°F (24.3°C), while the average low-temperature is 70°F (21.1°C).

What is the average humidity in January in Honolulu?

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

How much does it rain in Honolulu in January?

In Honolulu, Hawaii, during January, the rain falls for 12.6 days and regularly aggregates up to 0.98" (25mm) of precipitation.

What is the ocean temperature in January in Honolulu?

In Honolulu, the average seawater temperature in January is 76.6°F (24.8°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 76.6°F (24.8°C) water may be enjoyable.

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

In Honolulu, Hawaii, the average day length in January is 11h and 1min.

When is the sunrise / sunset in January in Honolulu?

On the first day of January in Honolulu, Hawaii, sunrise is at 7:09 am and sunset at 6:01 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:20 pm HST.

How long on average sun shines in January in Honolulu?

The average sunshine duration in January is 8.5h.

What is the month with the lowest UV index in Honolulu?

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

What is the UV index reading in January in Honolulu?

In Honolulu, Hawaii, the average daily maximum UV index in January is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Honolulu, HI

Average temperature in January - Honolulu, HI
  • Average high temperature in January: 75.7°F

The warmest month (with the highest average high temperature) is September (81.5°F).
The months with the lowest average high temperature are February and March (75°F).

  • Average low temperature in January: 70°F

The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is February (69.1°F).

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Average pressure in January
Honolulu, HI

Average pressure in January - Honolulu, HI
  • Average pressure in January: 30"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).

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Average wind speed in January
Honolulu, HI

Average wind speed in January - Honolulu, HI
  • Average wind speed in January: 9mph

The windiest month (with the highest average wind speed) is July (12.1mph).
The calmest month (with the lowest average wind speed) is January (9mph).

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Average humidity in January
Honolulu, HI

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

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

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Average rainfall in January
Honolulu, HI

Average rainfall in January - Honolulu, HI
  • Average rainfall in January: 0.98"

The wettest months (with the highest rainfall) are March and October (1.81").
The driest month (with the least rainfall) is July (0.67").

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Average rainfall days in January
Honolulu, HI

Average rainfall days in January - Honolulu, HI
  • Average rainfall days in January: 12.6 days

The months with the highest number of rainy days are March and October (18 days).
The month with the least rainy days is January (12.6 days).

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Average sea temperature in January
Honolulu, HI

Average sea temperature in January - Honolulu, HI
  • Average sea temperature in January: 76.6°F

The best month for swimming (with the highest average sea temperature) is September (80.4°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).

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Average daylight in January /
Average sunshine in January
Honolulu, HI

Average daylight in January / Average sunshine in January - Honolulu, 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: 8h and 30min

The month with the most sunshine is June (Average sunshine: 10h and 48min).
The months with the least sunshine are November and December (Average sunshine: 6h and 30min).

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Average sunshine days in January
Honolulu, HI

Average sunshine days in January - Honolulu, HI
  • Average sunshine days in January: 12.8 days

The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is October (6.3 days).

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Average UV index in January
Honolulu, HI

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

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

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Average cloud cover in January
Honolulu, HI

Average cloud cover in January - Honolulu, HI
  • Average cloud cover in January: 33

The month with the most cloud cover is March (Cloud cover 40).
The months with the least cloud cover are January and September (Cloud cover 33).

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Average visibility in January
Honolulu, HI

Average visibility in January - Honolulu, HI
  • Average visibility in January: 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).

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