Fall Weather in Riāsi India

Daily high temperatures decrease by 19°F, from 90°F to 70°F, rarely falling below 65°F or exceeding 94°F.

Daily low temperatures decrease by 29°F, from 75°F to 45°F, rarely falling below 41°F or exceeding 79°F.

For reference, on June 8, the hottest day of the year, temperatures in Riāsi typically range from 72°F to 97°F, while on January 9, the coldest day of the year, they range from 41°F to 62°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.

San Antonio, United States (8,105 miles away) is the far-away foreign place with temperatures most similar to Riāsi (view comparison).

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The fall in Riāsi experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 6% to 27%. The lowest chance of overcast or mostly cloudy conditions is 2% on September 25.

The clearest day of the fall is September 25, with clear, mostly clear, or partly cloudy conditions 98% of the time.

For reference, on March 22, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 42%, while on September 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 98%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Riāsi, the chance of a wet day over the course of the fall is very rapidly decreasing, starting the season at 31% and ending it at 7%.

For reference, the year's highest daily chance of a wet day is 49% on July 26, and its lowest chance is 5% on November 21.

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 Riāsi is very rapidly decreasing, starting the season at 3.5 inches, when it rarely exceeds 6.3 inches or falls below 0.9 inches, and ending the season at 0.6 inches, when it rarely exceeds 1.6 inches or falls below -0.0 inches.

The lowest average 31-day accumulation is 0.4 inches on November 11.

Over the course of the fall in Riāsi, 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 2 hours, 42 minutes, implying an average daily decrease of 1 minute, 48 seconds, and weekly decrease of 12 minutes, 34 seconds.

The shortest day of the fall is November 30, with 10 hours, 9 minutes of daylight and the longest day is September 1, with 12 hours, 50 minutes of daylight.

The earliest sunrise of the fall in Riāsi is 6:05 AM on September 1 and the latest sunrise is 1 hour, 10 minutes later at 7:15 AM on November 30.

The latest sunset is 6:55 PM on September 1 and the earliest sunset is 1 hour, 32 minutes earlier at 5:23 PM on November 30.

Daylight saving time is not observed in Riāsi during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:22 AM and sets 14 hours, 20 minutes later, at 7:42 PM, while on December 21, the shortest day of the year, it rises at 7:29 AM and sets 9 hours, 58 minutes later, at 5:27 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 Riāsi is very rapidly decreasing during the fall, falling from 68% to 0% over the course of the season.

For reference, on August 7, the muggiest day of the year, there are muggy conditions 92% of the time, while on November 29, 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 Riāsi is essentially constant during the fall, remaining within 0.4 miles per hour of 5.1 miles per hour throughout.

For reference, on May 24, the windiest day of the year, the daily average wind speed is 6.4 miles per hour, while on December 29, the calmest day of the year, the daily average wind speed is 4.6 miles per hour.

The highest daily average wind speed during the fall is 5.5 miles per hour on October 13.

The wind direction in Riāsi during the fall is predominantly out of the west from September 1 to October 3 and the north from October 3 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).

Temperatures in Riāsi 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 Riāsi are very rapidly increasing during the fall, increasing by 1,854°F, from 5,303°F to 7,157°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 Riāsi is very rapidly decreasing during the fall, falling by 2.9 kWh, from 6.4 kWh to 3.4 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Riāsi are 33.081 deg latitude, 74.832 deg longitude, and 1,709 ft elevation.

The topography within 2 miles of Riāsi contains very significant variations in elevation, with a maximum elevation change of 1,188 feet and an average elevation above sea level of 1,635 feet. Within 10 miles contains very significant variations in elevation (7,621 feet). Within 50 miles also contains extreme variations in elevation (14,705 feet).

The area within 2 miles of Riāsi is covered by cropland (64%), trees (14%), and bare soil (11%), within 10 miles by cropland (46%) and trees (34%), and within 50 miles by cropland (58%) and trees (24%).