This report describes the typical weather at the Kona International Airport (Kailua-Kona, Hawaii, United States) weather station over the course of an average January. It is based on the historical records from 1985 to 2012. Earlier records are either unavailable or unreliable.
Kailua-Kona, Hawaii has a tropical savanna climate with dry winters. The area within 25 mi of this station is covered by oceans and seas (100%).
The month of January is characterized by essentially constant daily high temperatures, with daily highs around 80°F throughout the month, exceeding 83°F or dropping below 77°F only one day in ten.
Over the course of January, the length of the day is essentially constant. The shortest day of the month is January 4 with 10:58 hours of daylight; the longest day is January 31 with 11:16 hours of daylight.
The earliest sunrise is at 6:59am on January 1; the latest sunset is at 6:16pm on January 31; the latest sunrise is at 7:02am on January 16; the earliest sunset is at 5:57pm on January 1.
Daylight savings time (DST) is not observed in 2012.
The median cloud cover is 23% (mostly clear) and does not vary substantially over the course of the month.
On January 16, a representative day, the sky is clear or mostly clear 52% of the time, partly cloudy 12% of the time, and mostly cloudy or overcast 23% of the time.
The average probability that some form of precipitation will be observed in a given day is 16%, with little variation over the course of the month.
Throughout January, the most common forms of precipitation are light rain, moderate rain, and heavy rain.
Light rain is the most severe precipitation observed during 60% of those days with precipitation. It is most likely around January 16, when it is observed during 10% of all days.
Moderate rain is the most severe precipitation observed during 22% of those days with precipitation. It is most likely around January 17, when it is observed during 4% of all days.
Heavy rain is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around January 2, when it is observed during 2% of all days.
Either snow is exceptionally unlikely to fall at this location in January or this station does not reliably report precipitation types.
The relative humidity typically ranges from 65% (mildly humid) to 84% (humid) over the course of a typical January, rarely dropping below 43% (comfortable) and reaching as high as 100% (very humid).
The air is driest around January 24, at which time the relative humidity drops below 77% (humid) three days out of four; it is most humid around January 2, rising above 75% (humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical January, the dew point typically varies from 57°F (comfortable) to 67°F (muggy) and is rarely below 51°F (very comfortable) or above 71°F (muggy).
Over the course of January typical wind speeds vary from 3 mph to 14 mph (light air to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around January 24, at which time the average daily maximum wind speed is 14 mph (moderate breeze).
The lowest average wind speed of 8 mph (gentle breeze) occurs around January 1, at which time the average daily maximum wind speed is 13 mph (moderate breeze).