Fall Weather at Petersburg, Dinwiddie County Airport United States

Daily high temperatures decrease by 29°F, from 86°F to 58°F, rarely falling below 45°F or exceeding 94°F.

Daily low temperatures decrease by 29°F, from 65°F to 35°F, rarely falling below 23°F or exceeding 72°F.

For reference, on July 20, the hottest day of the year, temperatures at Petersburg, Dinwiddie County Airport typically range from 69°F to 91°F, while on January 29, the coldest day of the year, they range from 29°F to 50°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.

Lárisa, Greece (5,101 miles away); Pāsārgād, Iran (6,801 miles); and Mashhad, Iran (6,671 miles) are the far-away foreign places with temperatures most similar to Petersburg, Dinwiddie County Airport (view comparison).

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The fall at Petersburg, Dinwiddie County Airport experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 38% to 47%. The lowest chance of overcast or mostly cloudy conditions is 36% on October 11.

The clearest day of the fall is October 11, with clear, mostly clear, or partly cloudy conditions 64% of the time.

For reference, on December 25, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 53%, while on October 8, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 64%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Petersburg, Dinwiddie County Airport, the chance of a wet day over the course of the fall is decreasing, starting the season at 29% and ending it at 24%.

For reference, the year's highest daily chance of a wet day is 42% on August 4, and its lowest chance is 21% on November 10.

Over the course of the fall at Petersburg, Dinwiddie County Airport, the chance of a day with only rain decreases from 29% to 22%, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 0% throughout.

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 at Petersburg, Dinwiddie County Airport is decreasing, starting the season at 3.8 inches, when it rarely exceeds 7.8 inches or falls below 1.1 inches, and ending the season at 3.0 inches, when it rarely exceeds 5.2 inches or falls below 1.1 inches.

The highest average 31-day accumulation is 3.8 inches on September 4.

Over the course of the fall at Petersburg, Dinwiddie County Airport, 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, 8 minutes, implying an average daily decrease of 2 minutes, 6 seconds, and weekly decrease of 14 minutes, 40 seconds.

The shortest day of the fall is November 30, with 9 hours, 48 minutes of daylight and the longest day is September 1, with 12 hours, 57 minutes of daylight.

The latest sunrise of the fall at Petersburg, Dinwiddie County Airport is 7:36 AM on November 2 and the earliest sunrise is 59 minutes earlier at 6:37 AM on November 3.

The latest sunset is 7:37 PM on September 1 and the earliest sunset is 2 hours, 45 minutes earlier at 4:52 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 5:50 AM and sets 14 hours, 43 minutes later, at 8:33 PM, while on December 21, the shortest day of the year, it rises at 7:20 AM and sets 9 hours, 36 minutes later, at 4:56 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 at Petersburg, Dinwiddie County Airport is very rapidly decreasing during the fall, falling from 56% to 1% over the course of the season.

For reference, on July 24, the muggiest day of the year, there are muggy conditions 78% of the time, while on January 30, 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 at Petersburg, Dinwiddie County Airport is increasing during the fall, increasing from 3.8 miles per hour to 4.8 miles per hour over the course of the season.

For reference, on February 26, the windiest day of the year, the daily average wind speed is 5.8 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 3.6 miles per hour.

The wind direction at Petersburg, Dinwiddie County Airport during the fall is predominantly out of the north from September 1 to November 17 and the west from November 17 to November 30.

Petersburg, Dinwiddie County Airport 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 at Petersburg, Dinwiddie County Airport is very rapidly decreasing during the fall, falling by 24°F, from 77°F to 53°F, over the course of the season.

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 at Petersburg, Dinwiddie County Airport typically lasts for 6.6 months (203 days), from around April 6 to around October 26, rarely starting before March 15 or after April 24, and rarely ending before October 10 or after November 11.

During the fall at Petersburg, Dinwiddie County Airport, the chance that a given day is within the growing season is very rapidly decreasing falling from 100% to 1% 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 at Petersburg, Dinwiddie County Airport are very rapidly increasing during the fall, increasing by 1,066°F, from 3,564°F to 4,630°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 at Petersburg, Dinwiddie County Airport is very rapidly decreasing during the fall, falling by 3.2 kWh, from 5.7 kWh to 2.5 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Petersburg, Dinwiddie County Airport are 37.184 deg latitude, -77.506 deg longitude, and 184 ft elevation.

The topography within 2 miles of Petersburg, Dinwiddie County Airport contains only modest variations in elevation, with a maximum elevation change of 105 feet and an average elevation above sea level of 184 feet. Within 10 miles also contains only modest variations in elevation (335 feet). Within 50 miles contains only modest variations in elevation (971 feet).

The area within 2 miles of Petersburg, Dinwiddie County Airport is covered by trees (58%), artificial surfaces (27%), and cropland (15%), within 10 miles by trees (75%) and artificial surfaces (13%), and within 50 miles by trees (71%) and cropland (18%).