Average Weather in September in Anniston Alabama, United States
In Anniston, the month of September is characterized by falling daily high temperatures, with daily highs decreasing by 8°F, from 87°F to 79°F over the course of the month, and rarely exceeding 93°F or dropping below 70°F.
Daily low temperatures decrease by 9°F, from 67°F to 58°F, rarely falling below 46°F or exceeding 72°F.
For reference, on July 23, the hottest day of the year, temperatures in Anniston typically range from 70°F to 89°F, while on January 26, the coldest day of the year, they range from 34°F to 53°F.
Average High and Low Temperature in September
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. 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.
Average Hourly Temperature in September
The month of September in Anniston experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 35% throughout the month.
The clearest day of the month is September 21, with clear, mostly clear, or partly cloudy conditions 67% of the time.
For reference, on January 4, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 55%, while on October 13, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.
Cloud Cover in September
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Anniston, the chance of a wet day over the course of September is rapidly decreasing, starting the month at 29% and ending it at 22%.
For reference, the year's highest daily chance of a wet day is 44% on July 9, and its lowest chance is 20% on October 15.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Anniston is gradually increasing, starting the month at 2.9 inches, when it rarely exceeds 5.8 inches or falls below 0.9 inches, and ending the month at 3.1 inches, when it rarely exceeds 6.5 inches or falls below 0.7 inches.
The highest average 31-day accumulation is 3.2 inches on September 22.
Average Monthly Rainfall in September
Over the course of September in Anniston, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 60 minutes, implying an average daily decrease of 2 minutes, 3 seconds, and weekly decrease of 14 minutes, 23 seconds.
The shortest day of the month is September 30, with 11 hours, 51 minutes of daylight and the longest day is September 1, with 12 hours, 51 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Anniston is 6:17 AM on September 1 and the latest sunrise is 20 minutes later at 6:37 AM on September 30.
The latest sunset is 7:08 PM on September 1 and the earliest sunset is 40 minutes earlier at 6:28 PM on September 30.
Daylight saving time is observed in Anniston during 2017, but it neither starts nor ends during September, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:33 AM and sets 14 hours, 23 minutes later, at 7:56 PM, while on December 21, the shortest day of the year, it rises at 6:44 AM and sets 9 hours, 55 minutes later, at 4:39 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Anniston is very rapidly decreasing during September, falling from 71% to 24% over the course of the month.
For reference, on July 22, the muggiest day of the year, there are muggy conditions 91% of the time, while on January 23, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in September
The average hourly wind speed in Anniston is essentially constant during September, remaining within 0.2 miles per hour of 2.0 miles per hour throughout.
For reference, on February 26, the windiest day of the year, the daily average wind speed is 2.8 miles per hour, while on August 4, the calmest day of the year, the daily average wind speed is 1.7 miles per hour.
Average Wind Speed in September
Wind Direction in September
The average daily incident shortwave solar energy in Anniston is gradually decreasing during September, falling by 0.8 kWh, from 5.8 kWh to 5.0 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Anniston are 33.660 deg latitude, -85.832 deg longitude, and 810 ft elevation.
The topography within 2 miles of Anniston contains very significant variations in elevation, with a maximum elevation change of 853 feet and an average elevation above sea level of 843 feet. Within 10 miles also contains very significant variations in elevation (1,552 feet). Within 50 miles contains very significant variations in elevation (2,005 feet).
The area within 2 miles of Anniston is covered by artificial surfaces (54%) and trees (46%), within 10 miles by trees (66%) and cropland (19%), and within 50 miles by trees (70%) and cropland (22%).
This report illustrates the typical weather in Anniston year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Anniston.
For each station, the records are corrected for the elevation difference between that station and Anniston according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Anniston is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Anniston and a given station.
The stations contributing to this reconstruction are: Anniston Metropolitan Airport (81%, 8 kilometers, south); Northeast Alabama Regional Airport (10%, 41 kilometers, northwest); West Georgia Regional Airport - O V Gray Field (6%, 63 kilometers, east); and Richard B Russell Airport (2.9%, 98 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .