Fall Weather in Hawaiian Beaches United States

Daily high temperatures decrease by 4°F, from 82°F to 79°F, rarely falling below 75°F or exceeding 85°F.

Daily low temperatures are around 68°F, rarely falling below 63°F or exceeding 72°F.

For reference, on August 30, the hottest day of the year, temperatures in Hawaiian Beaches typically range from 69°F to 82°F, while on January 28, the coldest day of the year, they range from 63°F to 78°F.

The figure below shows you a compact characterization of the hourly average fall temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Barranquitas, Puerto Rico (5,724 miles away) is the far-away foreign place with temperatures most similar to Hawaiian Beaches (view comparison).

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The fall in Hawaiian Beaches experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 28% to 39%. The highest chance of overcast or mostly cloudy conditions is 47% on October 27.

The clearest day of the fall is September 1, with clear, mostly clear, or partly cloudy conditions 72% of the time.

For reference, on October 27, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 47%, while on August 7, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 77%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Hawaiian Beaches, the chance of a wet day over the course of the fall is increasing, starting the season at 24% and ending it at 29%.

For reference, the year's highest daily chance of a wet day is 33% on April 6, and its lowest chance is 23% on August 29.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the fall in Hawaiian Beaches is essentially constant, remaining about 4.5 inches throughout, and rarely exceeding 15.8 inches.

The lowest average 31-day accumulation is 4.1 inches on October 21.

Over the course of the fall in Hawaiian Beaches, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 27 minutes, implying an average daily decrease of 58 seconds, and weekly decrease of 6 minutes, 46 seconds.

The shortest day of the fall is November 30, with 11 hours, 2 minutes of daylight and the longest day is September 1, with 12 hours, 29 minutes of daylight.

The earliest sunrise of the fall in Hawaiian Beaches is 6:04 AM on September 1 and the latest sunrise is 33 minutes later at 6:37 AM on November 30.

The latest sunset is 6:33 PM on September 1 and the earliest sunset is 54 minutes earlier at 5:39 PM on November 25.

Daylight saving time is not observed in Hawaiian Beaches during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:42 AM and sets 13 hours, 19 minutes later, at 7:00 PM, while on December 21, the shortest day of the year, it rises at 6:49 AM and sets 10 hours, 57 minutes later, at 5:46 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the fall of 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Hawaiian Beaches is very rapidly decreasing during the fall, falling from 85% to 58% over the course of the season.

For reference, on August 12, the muggiest day of the year, there are muggy conditions 88% of the time, while on January 30, the least muggy day of the year, there are muggy conditions 25% of the time.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Hawaiian Beaches is gradually increasing during the fall, increasing from 11.8 miles per hour to 12.5 miles per hour over the course of the season.

For reference, on April 6, the windiest day of the year, the daily average wind speed is 13.1 miles per hour, while on January 12, the calmest day of the year, the daily average wind speed is 10.9 miles per hour.

The highest daily average wind speed during the fall is 12.6 miles per hour on November 28.

The hourly average wind direction in Hawaiian Beaches throughout the fall is predominantly from the east, with a peak proportion of 93% on September 1.

Hawaiian Beaches is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Hawaiian Beaches is gradually decreasing during the fall, falling by 2°F, from 80°F to 78°F, over the course of the season.

The highest average surface water temperature during the fall is 80°F on September 15.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in Hawaiian Beaches are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Hawaiian Beaches are very rapidly increasing during the fall, increasing by 2,131°F, from 5,400°F to 7,531°F, over the course of the season.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Hawaiian Beaches is very rapidly decreasing during the fall, falling by 2.4 kWh, from 6.9 kWh to 4.5 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Hawaiian Beaches are 19.543 deg latitude, -154.916 deg longitude, and 262 ft elevation.

The topography within 2 miles of Hawaiian Beaches contains only modest variations in elevation, with a maximum elevation change of 390 feet and an average elevation above sea level of 273 feet. Within 10 miles contains only modest variations in elevation (1,673 feet). Within 50 miles contains very significant variations in elevation (13,816 feet).

The area within 2 miles of Hawaiian Beaches is covered by shrubs (49%), trees (27%), and artificial surfaces (20%), within 10 miles by water (40%) and trees (29%), and within 50 miles by water (71%).