Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average sea temperature in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
Kailua's weather, upon January's arrival, documents an average high-temperature of a still moderately hot 75.2°F (24°C), nearly identical to the prior month. During January, Kailua perceives a slight decrease in temperature from daytime highs, settling at an average low of 71.8°F (22.1°C).Humidity
January and November, with an average relative humidity of 74%, are the least humid months in Kailua.Rainfall
In January, in Kailua, Hawaii, the rain falls for 12.6 days. Throughout January, 1.14" (29mm) of precipitation is accumulated. Throughout the year, there are 169.9 rainfall days, and 13.15" (334mm) of precipitation is accumulated.Ocean temperature
In Kailua, in January, the average water temperature is 76.6°F (24.8°C).Note: Given an individual's cold sensitivity, considering factors like sunshine, wind, and air temperature, a brief swim in 76.6°F (24.8°C) water might be pleasurable. (FYI: The standard water temperature for Olympic swimming contests is 77°F (25°C) to 82.4°F (28°C).)
Daylight
In January, the average length of the day in Kailua is 11h and 1min.On the first day of the month, sunrise is at 7:08 am and sunset at 6:00 pm. On the last day of January, in Kailua, sunrise is at 7:08 am and sunset at 6:20 pm HST.
Sunshine
In January, the average sunshine in Kailua is 8.7h.UV index
January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In January, the maximum UV index of 6 translates into these guidelines:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Notice! The reflection of water and sand increases the UV radiation significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average January temperature in Kailua?
What is the least humid month in Kailua?
What is the average humidity in January in Kailua?
How many days does it rain in January in Kailua?
What is the water temperature in January in Kailua?
What is the average length of the day in January in Kailua?
What time are sunrise and sunset in January in Kailua?
How many hours of sunshine does Kailua have in January?
When is the lowest UV index in Kailua?
What is the UV index reading in January in Kailua?
Average temperature in January
Kailua, HI
- Average high temperature in January: 75.2°F
The warmest month (with the highest average high temperature) is September (80.6°F).
The month with the lowest average high temperature is February (74.5°F).
- Average low temperature in January: 71.8°F
The months with the highest average low temperature are September and October (77°F).
The coldest month (with the lowest average low temperature) is February (70.5°F).
Average pressure in January
Kailua, 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).
Average wind speed in January
Kailua, HI
- Average wind speed in January: 10.7mph
The windiest month (with the highest average wind speed) is July (14.1mph).
The calmest month (with the lowest average wind speed) is January (10.7mph).
Average humidity in January
Kailua, HI
- Average humidity in January: 74%
The months with the highest relative humidity are April, June, July, August and December (76%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in January
Kailua, HI
- Average rainfall in January: 1.14"
The wettest month (with the highest rainfall) is March (1.69").
The driest month (with the least rainfall) is July (0.55").
Average rainfall days in January
Kailua, HI
- Average rainfall days in January: 12.6 days
The month with the highest number of rainy days is March (16.9 days).
The month with the least rainy days is June (11.3 days).
Average sea temperature in January
Kailua, 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).
Average daylight in January /
Average sunshine in January
Kailua, HI
- Average daylight in January: 11h and 0min
The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in January: 8h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in January
Kailua, HI
- Average sunshine days in January: 12.8 days
The month with the most sunshine days is June (13.6 days).
The months with the least sunshine days are March and November (6.6 days).
Average UV index in January
Kailua, HI
- Average UV index in January: 6
The months with the highest UV index are July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, November and December (UV index 6).
Average cloud cover in January
Kailua, HI
- Average cloud cover in January: 30
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is September (Cloud cover 27).
Average visibility in January
Kailua, 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).
Kailua, Hawaii, USA
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