January weather forecast and climate
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, the same as December, is a moderately hot winter month in Honolulu, Hawaii, with average temperature fluctuating between 70°F (21.1°C) and 75.7°F (24.3°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). In Honolulu, the average low-temperature is 70°F (21.1°C).

Humidity

In Honolulu, the average relative humidity is 75%.

Rainfall

In Honolulu, it is raining for 12.6 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, there are 197.2 rainfall days, and 14.61" (371mm) of precipitation is accumulated.

Ocean temperature

In Honolulu, the average water temperature 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

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

Sunshine

The average sunshine in January is 8.5h.

UV index

Months with the lowest UV index are January through June, October through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. 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. 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 strength of the UV rays is significantly increased by the reflection of the water and sand.
[Resources]

FAQ

What is the temperature in January in Honolulu?

In Honolulu, in January, the average high-temperature is 75.7°F (24.3°C), and 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 many days does it rain in January in Honolulu?

In Honolulu, Hawaii, in January, it is raining for 12.6 days, with typically 0.98" (25mm) of accumulated 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). 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).

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

The average length of the day in January is 11h.

How many hours of sunshine does Honolulu have in January?

The average sunshine in January in Honolulu, Hawaii, is 8.5h.

What are the months with the lowest UV index in Honolulu?

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

How high is the UV index in January in Honolulu?

In Honolulu, Hawaii, the average daily maximum UV index in January is 6. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.

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).
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).

[Resources]

Average pressure in January
Honolulu, HI

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

The month with the highest atmospheric pressure is April (30.06").
Months with the lowest atmospheric pressure are September and October (29.97").

[Resources]

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).

[Resources]

Average humidity in January
Honolulu, HI

Average humidity in January - Honolulu, 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, September and November (74%).

[Resources]

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").

[Resources]

Average rainfall days in January
Honolulu, HI

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

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).

[Resources]

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).

[Resources]

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

The month with the longest days is June (Average daylight: 13.4h).
The month with the shortest days is December (Average daylight: 10.9h).

  • Average sunshine in January: 8.5h

The month with the most sunshine is June (Average sunshine: 10.8h).
Months with the least sunshine are November and December (Average sunshine: 6.5).

[Resources]

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).

[Resources]

Average UV index in January
Honolulu, HI

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

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

[Resources]

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).
Months with the least cloud cover are January and September (Cloud cover 33).

[Resources]

Average visibility in January
Honolulu, HI

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

[Resources]