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
With the onset of January, the average high-temperature stands at a still moderately hot 75.9°F (24.4°C), closely aligned with December's 76.6°F (24.8°C). The temperature during January sees a subtle transition from day to night, averaging a low of 70.5°F (21.4°C).Humidity
The months with the lowest humidity are January, April through June, August through November, with an average relative humidity of 74%.Rainfall
In Ewa Beach, in January, during 12.3 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Ewa Beach, during the entire year, the rain falls for 172.2 days and collects up to 12.72" (323mm) of precipitation.Ocean temperature
In Ewa Beach, the average seawater temperature in January is 76.8°F (24.9°C).Note: Swimming in 76.8°F (24.9°C) water can be enjoyable based on one's cold tolerance and conditions like sunshine, wind, and ambient temperature. (Olympic swimmers compete in waters between 77°F (25°C) and 82.4°F (28°C).)
Daylight
The average length of the day in January is 11h and 1min.On the first day of January, sunrise is at 7:09 am and sunset at 6:01 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:21 pm HST.
Sunshine
In January, the average sunshine is 8.7h.UV index
January through May, October through 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 threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 6 in January translates into this advice:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. 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 least humid month?
What is the average humidity in January?
How many days does it rain in January?
What is the ocean temperature in January?
What is the average length of the day in January in Ewa Beach?
When is the sunrise / sunset in January?
How many hours of sunshine does Ewa Beach have in January?
What is the month with the lowest UV index in Ewa Beach?
What is the UV index intensity in January?
Average temperature in January
Ewa Beach, HI
- Average high temperature in January: 75.9°F
The warmest months (with the highest average high temperature) are August and September (81.5°F).
The month with the lowest average high temperature is February (74.8°F).
- Average low temperature in January: 70.5°F
The months with the highest average low temperature are August and September (76.3°F).
The coldest month (with the lowest average low temperature) is February (69.4°F).
Average pressure in January
Ewa Beach, HI
- Average pressure in January: 30"Hg
The months with the highest atmospheric pressure are March and April (30.05"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in January
Ewa Beach, HI
- Average wind speed in January: 9.1mph
The windiest month (with the highest average wind speed) is July (11.9mph).
The calmest months (with the lowest average wind speed) are January and October (9.1mph).
Average humidity in January
Ewa Beach, HI
- Average humidity in January: 74%
The month with the highest relative humidity is December (76%).
The months with the lowest relative humidity are January, April, May, June, August, September, October and November (74%).
Average rainfall in January
Ewa Beach, HI
- Average rainfall in January: 0.98"
The wettest month (with the highest rainfall) is March (1.77").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in January
Ewa Beach, HI
- Average rainfall days in January: 12.3 days
The month with the highest number of rainy days is March (18.1 days).
The month with the least rainy days is July (11.3 days).
Average sea temperature in January
Ewa Beach, HI
- Average sea temperature in January: 76.9°F
The best month for swimming (with the highest average sea temperature) is September (80.6°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).
Average daylight in January /
Average sunshine in January
Ewa Beach, 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 0min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).
Average sunshine days in January
Ewa Beach, HI
- Average sunshine days in January: 13.9 days
The months with the most sunshine days are July and August (15.3 days).
The month with the least sunshine days is March (6.8 days).
Average UV index in January
Ewa Beach, HI
- Average UV index in January: 6
The months with the highest UV index are June, July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, October, November and December (UV index 6).
Average cloud cover in January
Ewa Beach, HI
- Average cloud cover in January: 31
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in January
Ewa Beach, 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).
Ewa Beach, Hawaii, USA
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