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 dawn of January sees an average high-temperature of a still moderately hot 75.4°F (24.1°C), subtly contrasting with December's 76.1°F (24.5°C). The nights of January are characterized by an average low-temperature of 70.5°F (21.4°C), subtly descending from daytime highs.Humidity
The months with the lowest humidity are January, May, June, September and November, with an average relative humidity of 75%.Rainfall
In Heeia, in January, it is raining for 13.7 days, with typically 1.34" (34mm) of accumulated precipitation. In Heeia, during the entire year, the rain falls for 187.1 days and collects up to 15.83" (402mm) of precipitation.Ocean temperature
In Heeia, in January, the average water temperature is 76.6°F (24.8°C).Note: If cold is not your friend, swimming at 76.6°F (24.8°C) might be daunting. But the right mix of sunshine, wind, and external temperature can make a difference. Although wetsuits are not essential, they can enhance the swimming experience.
Daylight
In January, the average length of the day is 11h and 0min.On the first day of the month, sunrise is at 7:09 am and sunset at 6:00 pm. On the last day of January, sunrise is at 7:08 am and sunset at 6:20 pm HST.
Sunshine
The average sunshine in January is 8.3h.UV index
January through June, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Heeia, Hawaii. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.Note: In January, the maximum UV index of 6 suggests this advice:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Boost your sun resistance with garments that are densely woven yet spacious. Beware! Reflections from sand and water can intensify the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Heeia in January?
What are the least humid months in Heeia?
What is the average humidity in January in Heeia?
How many days does it rain in January in Heeia?
What is the water temperature in January in Heeia?
How many hours of daylight does Heeia have in January?
When is the sunrise / sunset in January in Heeia?
How many hours of sunshine does Heeia have in January?
What are the months with the lowest UV index in Heeia?
What is the UV index intensity in January in Heeia?
Average temperature in January
Heeia, HI
- Average high temperature in January: 75.4°F
The warmest months (with the highest average high temperature) are August and September (81°F).
The month with the lowest average high temperature is February (74.3°F).
- Average low temperature in January: 70.5°F
The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is February (69.6°F).
Average pressure in January
Heeia, 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
Heeia, HI
- Average wind speed in January: 10.3mph
The windiest month (with the highest average wind speed) is July (13.5mph).
The calmest month (with the lowest average wind speed) is January (10.3mph).
Average humidity in January
Heeia, HI
- Average humidity in January: 75%
The months with the highest relative humidity are February, March, April, July, August, October and December (76%).
The months with the lowest relative humidity are January, May, June, September and November (75%).
Average rainfall in January
Heeia, HI
- Average rainfall in January: 1.34"
The wettest month (with the highest rainfall) is March (2.01").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days in January
Heeia, HI
- Average rainfall days in January: 13.7 days
The month with the highest number of rainy days is March (18.3 days).
The month with the least rainy days is June (13.5 days).
Average sea temperature in January
Heeia, 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
Heeia, 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 2min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in January
Heeia, HI
- Average sunshine days in January: 11.5 days
The month with the most sunshine days is June (12.2 days).
The month with the least sunshine days is April (6.5 days).
Average UV index in January
Heeia, 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).
Average cloud cover in January
Heeia, HI
- Average cloud cover in January: 35
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in January
Heeia, 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).
Heeia, Hawaii, USA
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