Fall Weather in Larkfield-Wikiup United States

Daily high temperatures decrease by 25°F, from 84°F to 60°F, rarely falling below 53°F or exceeding 95°F.

Daily low temperatures decrease by 13°F, from 52°F to 39°F, rarely falling below 30°F or exceeding 56°F.

For reference, on July 3, the hottest day of the year, temperatures in Larkfield-Wikiup typically range from 52°F to 85°F, while on December 31, the coldest day of the year, they range from 36°F to 55°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.

Chillán, Chile (6,118 miles away) is the far-away foreign place with temperatures most similar to Larkfield-Wikiup (view comparison).

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The fall in Larkfield-Wikiup experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 11% to 53%.

The clearest day of the fall is September 3, with clear, mostly clear, or partly cloudy conditions 89% of the time.

For reference, on January 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 59%, while on July 19, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 92%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Larkfield-Wikiup, the chance of a wet day over the course of the fall is very rapidly increasing, starting the season at 2% and ending it at 29%.

For reference, the year's highest daily chance of a wet day is 35% on February 20, and its lowest chance is 0% on July 25.

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 Larkfield-Wikiup is very rapidly increasing, starting the season at 0.1 inches, when it rarely exceeds 0.4 inches or falls below -0.0 inches, and ending the season at 5.0 inches, when it rarely exceeds 10.1 inches or falls below 0.9 inches.

Over the course of the fall in Larkfield-Wikiup, the length of the day is very rapidly decreasing. From the start to the end of the season, the length of the day decreases by 3 hours, 18 minutes, implying an average daily decrease of 2 minutes, 12 seconds, and weekly decrease of 15 minutes, 23 seconds.

The shortest day of the fall is November 30, with 9 hours, 41 minutes of daylight and the longest day is September 1, with 12 hours, 59 minutes of daylight.

The latest sunrise of the fall in Larkfield-Wikiup is 7:39 AM on November 2 and the earliest sunrise is 59 minutes earlier at 6:40 AM on November 3.

The latest sunset is 7:39 PM on September 1 and the earliest sunset is 2 hours, 49 minutes earlier at 4:50 PM on November 30.

Daylight saving time (DST) starts at 1:00 AM on November 3, 2024, shifting sunrise and sunset to be an hour later.

For reference, on June 20, the longest day of the year, the Sun rises at 5:47 AM and sets 14 hours, 52 minutes later, at 8:38 PM, while on December 21, the shortest day of the year, it rises at 7:25 AM and sets 9 hours, 29 minutes later, at 4:53 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 Larkfield-Wikiup is essentially constant during the fall, remaining around 0% throughout.

For reference, on April 20, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% 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 Larkfield-Wikiup is essentially constant during the fall, remaining within 0.3 miles per hour of 6.6 miles per hour throughout.

For reference, on June 5, the windiest day of the year, the daily average wind speed is 7.9 miles per hour, while on October 28, the calmest day of the year, the daily average wind speed is 6.3 miles per hour.

The lowest daily average wind speed during the fall is 6.3 miles per hour on October 28.

The wind direction in Larkfield-Wikiup during the fall is predominantly out of the west from September 1 to October 16 and the north from October 16 to November 30.

Larkfield-Wikiup 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 Larkfield-Wikiup is gradually decreasing during the fall, falling by 2°F, from 56°F to 54°F, over the course of the season.

The highest average surface water temperature during the fall is 56°F on September 24.

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).

The growing season in Larkfield-Wikiup typically lasts for 8.9 months (272 days), from around February 26 to around November 24, rarely starting before January 28 or after March 30, and rarely ending before November 4 or after December 19.

During the fall in Larkfield-Wikiup, the chance that a given day is within the growing season is very rapidly decreasing falling from 100% to 37% over the course of the season.

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 Larkfield-Wikiup are rapidly increasing during the fall, increasing by 835°F, from 2,201°F to 3,037°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 Larkfield-Wikiup is very rapidly decreasing during the fall, falling by 4.6 kWh, from 6.8 kWh to 2.2 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Larkfield-Wikiup are 38.513 deg latitude, -122.751 deg longitude, and 318 ft elevation.

The topography within 2 miles of Larkfield-Wikiup contains significant variations in elevation, with a maximum elevation change of 791 feet and an average elevation above sea level of 301 feet. Within 10 miles contains significant variations in elevation (2,343 feet). Within 50 miles contains large variations in elevation (4,915 feet).

The area within 2 miles of Larkfield-Wikiup is covered by cropland (27%), artificial surfaces (27%), trees (27%), and grassland (15%), within 10 miles by cropland (29%) and grassland (22%), and within 50 miles by water (26%) and shrubs (25%).