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
The shift to January signals an average high-temperature of a still moderately hot 75.9°F (24.4°C), subtly varied from December's 76.6°F (24.8°C). January's average low temperature is an agreeable 70°F (21.1°C), displaying a subtle drop from its daily peak.Humidity
In January, the average relative humidity is 75%.Rainfall
In Waialua, in January, it is raining for 12.5 days, with typically 0.79" (20mm) of accumulated precipitation. Throughout the year, there are 190.2 rainfall days, and 11.65" (296mm) of precipitation is accumulated.Ocean temperature
In Waialua, the average seawater temperature in January is 76.6°F (24.8°C).Note: When considering a person's aversion to cold, factors like sunshine, wind, and atmospheric temperature are key. Swimming in 76.6°F (24.8°C) might be delightful. (Remember: The Olympics' swimming events have water temperatures between 77°F (25°C) and 82.4°F (28°C).)
Daylight
The average length of the day in January is 11h and 0min.On the first day of the month, sunrise is at 7:10 am and sunset at 6:01 pm. On the last day of January, sunrise is at 7:10 am and sunset at 6:21 pm HST.
Sunshine
In January, the average sunshine is 8.2h.UV index
The months with the lowest UV index are January through June, August, October through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In January, the average maximum UV index of 6 translates into the following recommendations:
Fend off overexposure. Sun protection is vital. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Beware! Reflecting off water and sand, UV rays are much stronger.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in January?
What is the average humidity in January?
How much does it rain in January?
How warm is the water in January?
How many hours of daylight does Waialua have in January?
When is the sunrise / sunset in January?
How long on average sun shines in January?
What are the months with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Waialua, HI
- Average high temperature in January: 75.9°F
The warmest month (with the highest average high temperature) is September (81.7°F).
The month with the lowest average high temperature is February (75°F).
- Average low temperature in January: 70°F
The months with the highest average low temperature are August and September (75.7°F).
The coldest month (with the lowest average low temperature) is February (68.5°F).
Average pressure in January
Waialua, HI
- Average pressure in January: 30"Hg
The month with the highest atmospheric pressure is April (30.06"Hg).
The month with the lowest atmospheric pressure is October (29.97"Hg).
Average wind speed in January
Waialua, HI
- Average wind speed in January: 9mph
The windiest month (with the highest average wind speed) is July (11.6mph).
The calmest month (with the lowest average wind speed) is January (9mph).
Average humidity in January
Waialua, 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 May and September (74%).
Average rainfall in January
Waialua, HI
- Average rainfall in January: 0.79"
The wettest months (with the highest rainfall) are February and October (1.34").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days in January
Waialua, HI
- Average rainfall days in January: 12.5 days
The month with the highest number of rainy days is March (17.7 days).
The month with the least rainy days is January (12.5 days).
Average sea temperature in January
Waialua, HI
- Average sea temperature in January: 76.6°F
The best month for swimming (with the highest average sea temperature) is September (80.2°F).
The coldest month (with the lowest average sea temperature) is March (75.2°F).
Average daylight in January /
Average sunshine in January
Waialua, 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 48min).
- Average sunshine in January: 8h and 1min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is November (Average sunshine: 6h and 12min).
Average sunshine days in January
Waialua, HI
- Average sunshine days in January: 12.9 days
The month with the most sunshine days is January (12.9 days).
The month with the least sunshine days is September (6.5 days).
Average UV index in January
Waialua, HI
- Average UV index in January: 6
The months with the highest UV index are July and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, August, October, November and December (UV index 6).
Average cloud cover in January
Waialua, HI
- Average cloud cover in January: 37
The month with the most cloud cover is March (Cloud cover 44).
The months with the least cloud cover are January and September (Cloud cover 37).
Average visibility in January
Waialua, 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).
Waialua, Hawaii, USA
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