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 start of January sees the average high-temperature at a still moderately hot 75.7°F (24.3°C), showing little difference from December's 76.5°F (24.7°C). January nights reveal a minor deviation from daytime highs, with a mean low-temperature of 69.1°F (20.6°C).Humidity
In Waimalu, the average relative humidity in January is 75%.Rainfall
In Waimalu, in January, during 13.5 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. Throughout the year, there are 208.4 rainfall days, and 16.5" (419mm) of precipitation is accumulated.Ocean temperature
January through April, with an average ocean temperature of 75.2°F (24°C), are months with the coldest seawater in Waimalu.Note: People sensitive to cold might find swimming in 75.2°F (24°C) challenging. However, conditions like sunshine, wind, and ambient temperature play a significant role in the overall comfort. Wetsuits, while optional, might be beneficial.
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, sunrise is at 7:09 am and sunset at 6:20 pm HST.
Sunshine
In January, the average sunshine is 8.2h.UV index
The months with the lowest UV index are January through August, October through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 6 in January transforms into the following instructions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. 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. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Be mindful! Sand and water reflections can up the Sun's UV exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are January temperatures?
What is the average humidity in January?
How much does it rain in January?
What are the months with the coldest ocean?
What is the ocean temperature in January?
What is the average length of the day in January?
When are sunrise and sunset in January?
How many hours of sunshine does Waimalu have in January?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Waimalu, HI
- Average high temperature in January: 75.7°F
The warmest months (with the highest average high temperature) are August and September (82°F).
The months with the lowest average high temperature are February and March (75.4°F).
- Average low temperature in January: 69.1°F
The month with the highest average low temperature is September (75°F).
The coldest month (with the lowest average low temperature) is February (68°F).
Average pressure in January
Waimalu, 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
Waimalu, HI
- Average wind speed in January: 8.4mph
The windiest month (with the highest average wind speed) is July (11.3mph).
The calmest month (with the lowest average wind speed) is January (8.4mph).
Average humidity in January
Waimalu, 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, June and September (74%).
Average rainfall in January
Waimalu, HI
- Average rainfall in January: 1.1"
The wettest month (with the highest rainfall) is October (2.09").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days in January
Waimalu, HI
- Average rainfall days in January: 13.5 days
The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is January (13.5 days).
Average sea temperature in January
Waimalu, HI
- Average sea temperature in January: 75°F
The best months for swimming (with the highest average sea temperature) are August, September and October (81°F).
The coldest months (with the lowest average sea temperature) are January, February, March and April (75°F).
Average daylight in January /
Average sunshine in January
Waimalu, 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 1min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The months with the least sunshine are November and December (Average sunshine: 6h and 18min).
Average sunshine days in January
Waimalu, HI
- Average sunshine days in January: 12.3 days
The month with the most sunshine days is January (12.3 days).
The month with the least sunshine days is November (6.2 days).
Average UV index in January
Waimalu, HI
- Average UV index in January: 6
The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).
Average cloud cover in January
Waimalu, HI
- Average cloud cover in January: 36
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 36).
Average visibility in January
Waimalu, 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).
Waimalu, Hawaii, USA
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