Fall Weather in Sofia Bulgaria

Daily high temperatures decrease by 35°F, from 78°F to 44°F, rarely falling below 31°F or exceeding 89°F.

Daily low temperatures decrease by 25°F, from 54°F to 29°F, rarely falling below 18°F or exceeding 60°F.

For reference, on August 4, the hottest day of the year, temperatures in Sofia typically range from 58°F to 83°F, while on January 19, the coldest day of the year, they range from 22°F to 37°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.

Parsons, West Virginia, United States (5,021 miles away) is the far-away foreign place with temperatures most similar to Sofia (view comparison).

© OpenStreetMap contributors

Compare Sofia to another city:

CompareMap

The fall in Sofia experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 22% to 52%. The highest chance of overcast or mostly cloudy conditions is 53% on November 29.

The clearest day of the fall is September 1, with clear, mostly clear, or partly cloudy conditions 78% of the time.

For reference, on November 29, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 53%, while on July 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 88%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Sofia, the chance of a wet day over the course of the fall is essentially constant, remaining around 18% throughout.

For reference, the year's highest daily chance of a wet day is 34% on June 2, and its lowest chance is 14% on October 29.

Over the course of the fall in Sofia, the chance of a day with only rain decreases from 17% to 12%, the chance of a day with mixed snow and rain increases from 0% to 3%, and the chance of a day with only snow increases from 0% to 3%.

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 Sofia is gradually decreasing, starting the season at 1.3 inches, when it rarely exceeds 2.4 inches or falls below 0.4 inches, and ending the season at 0.9 inches, when it rarely exceeds 1.9 inches or falls below 0.2 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during the fall in Sofia is increasing, starting the season at -0.0 inches, when it rarely exceeds 0.0 inches or falls below -0.0 inches, and ending the season at 2.7 inches, when it rarely exceeds 7.0 inches.

Over the course of the fall in Sofia, 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, 51 minutes, implying an average daily decrease of 2 minutes, 34 seconds, and weekly decrease of 17 minutes, 58 seconds.

The shortest day of the fall is November 30, with 9 hours, 18 minutes of daylight and the longest day is September 1, with 13 hours, 9 minutes of daylight.

The earliest sunrise of the fall in Sofia is 6:51 AM on September 1 and the latest sunrise is 1 hour, 2 minutes later at 7:53 AM on October 26.

The latest sunset is 8:00 PM on September 1 and the earliest sunset is 3 hours, 6 minutes earlier at 4:54 PM on November 30.

Daylight saving time (DST) starts at 3:00 AM on October 27, 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 5:48 AM and sets 15 hours, 20 minutes later, at 9:08 PM, while on December 21, the shortest day of the year, it rises at 7:53 AM and sets 9 hours, 2 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 in Sofia is essentially constant during the fall, remaining around 0% throughout.

For reference, on July 29, the muggiest day of the year, there are muggy conditions 2% 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 Sofia is increasing during the fall, increasing from 5.3 miles per hour to 6.3 miles per hour over the course of the season.

For reference, on February 21, the windiest day of the year, the daily average wind speed is 7.0 miles per hour, while on August 11, the calmest day of the year, the daily average wind speed is 5.1 miles per hour.

The wind direction in Sofia during the fall is predominantly out of the north from September 1 to September 30, the south from September 30 to November 29, and the west from November 29 to November 30.

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 Sofia typically lasts for 6.1 months (185 days), from around April 17 to around October 19, rarely starting before March 30 or after May 3, and rarely ending before October 2 or after November 6.

During the fall in Sofia, the chance that a given day is within the growing season is very rapidly decreasing falling from 100% to 0% 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 Sofia are rapidly increasing during the fall, increasing by 544°F, from 2,174°F to 2,718°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 Sofia is very rapidly decreasing during the fall, falling by 3.9 kWh, from 5.8 kWh to 1.9 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Sofia are 42.698 deg latitude, 23.324 deg longitude, and 1,844 ft elevation.

The topography within 2 miles of Sofia contains only modest variations in elevation, with a maximum elevation change of 322 feet and an average elevation above sea level of 1,818 feet. Within 10 miles contains only modest variations in elevation (5,830 feet). Within 50 miles also contains extreme variations in elevation (9,177 feet).

The area within 2 miles of Sofia is covered by artificial surfaces (99%), within 10 miles by cropland (44%) and artificial surfaces (32%), and within 50 miles by trees (54%) and cropland (28%).