Average Weather in September in Waldron Arkansas, United States
Daily high temperatures decrease by 10°F, from 90°F to 81°F, rarely falling below 71°F or exceeding 98°F.
Daily low temperatures decrease by 11°F, from 68°F to 57°F, rarely falling below 46°F or exceeding 74°F.
For reference, on July 22, the hottest day of the year, temperatures in Waldron typically range from 72°F to 94°F, while on January 7, the coldest day of the year, they range from 33°F to 51°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
’Aïn el Bell, Algeria (5,279 miles away); Kafr Takhārīm, Syria (6,598 miles); and Hetang, China (7,670 miles) are the far-away foreign places with temperatures most similar to Waldron (view comparison).
The month of September in Waldron experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 31% throughout the month.
The clearest day of the month is September 30, with clear, mostly clear, or partly cloudy conditions 70% of the time.
For reference, on February 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 50%, while on October 5, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%.
Cloud Cover Categories in September
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Waldron, the chance of a wet day over the course of September is essentially constant, remaining around 28% throughout.
For reference, the year's highest daily chance of a wet day is 44% on May 21, and its lowest chance is 20% on January 13.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Waldron is increasing, starting the month at 3.1 inches, when it rarely exceeds 5.1 inches or falls below 1.0 inches, and ending the month at 3.9 inches, when it rarely exceeds 7.2 inches or falls below 1.1 inches.
Average Monthly Rainfall in September
Over the course of September in Waldron, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 2 minutes, implying an average daily decrease of 2 minutes, 9 seconds, and weekly decrease of 15 minutes, 5 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, 54 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Waldron is 6:49 AM on September 1 and the latest sunrise is 21 minutes later at 7:10 AM on September 30.
The latest sunset is 7:42 PM on September 1 and the earliest sunset is 41 minutes earlier at 7:01 PM on September 30.
Daylight saving time is observed in Waldron during 2018, 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 6:03 AM and sets 14 hours, 30 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, 49 minutes later, at 5:08 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Waldron is very rapidly decreasing during September, falling from 67% to 25% over the course of the month.
For reference, on July 22, the muggiest day of the year, there are muggy conditions 88% of the time, while on January 19, 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 Waldron is gradually increasing during September, increasing from 3.8 miles per hour to 4.3 miles per hour over the course of the month.
For reference, on April 1, the windiest day of the year, the daily average wind speed is 5.7 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 3.5 miles per hour.
Average Wind Speed in September
Wind Direction in September
The growing season in Waldron typically lasts for 7.4 months (227 days), from around March 25 to around November 7, rarely starting before March 2 or after April 17, and rarely ending before October 17 or after November 29.
The month of September in Waldron is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in Waldron are rapidly increasing during September, increasing by 659°F, from 3,974°F to 4,633°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Waldron is gradually decreasing during September, falling by 0.9 kWh, from 5.9 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 Waldron are 34.898 deg latitude, -94.091 deg longitude, and 696 ft elevation.
The topography within 2 miles of Waldron contains only modest variations in elevation, with a maximum elevation change of 207 feet and an average elevation above sea level of 694 feet. Within 10 miles contains only modest variations in elevation (1,706 feet). Within 50 miles contains very significant variations in elevation (2,444 feet).
The area within 2 miles of Waldron is covered by cropland (83%) and artificial surfaces (14%), within 10 miles by trees (73%) and cropland (26%), and within 50 miles by trees (68%) and cropland (27%).
This report illustrates the typical weather in Waldron 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Waldron.
For each station, the records are corrected for the elevation difference between that station and Waldron 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 Waldron is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Waldron and a given station.
The stations contributing to this reconstruction are: Mena Intermountain Municipal Airport (30%, 41 kilometers, south); Robert S Kerr Airport (23%, 50 kilometers, west); Fort Smith Municipal Airport (21%, 54 kilometers, northwest); Mount Ida (18%, 61 kilometers, southeast); and Russellville Municipal Airport (8%, 99 kilometers, northeast).
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Time zones for aiports and weather stations are provided by AskGeo.com .