Average Weather in September in Lone Star Texas, United States
Daily high temperatures decrease by 8°F, from 91°F to 83°F, rarely falling below 73°F or exceeding 98°F.
Daily low temperatures decrease by 10°F, from 70°F to 61°F, rarely falling below 50°F or exceeding 75°F.
For reference, on August 11, the hottest day of the year, temperatures in Lone Star typically range from 73°F to 94°F, while on January 8, the coldest day of the year, they range from 37°F to 56°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
Ar Rudayyif, Tunisia (5,617 miles away); Açıkdere, Turkey (6,712 miles); and Huotong, China (7,745 miles) are the far-away foreign places with temperatures most similar to Lone Star (view comparison).
The month of September in Lone Star experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 34% to 29%. The highest chance of overcast or mostly cloudy conditions is 34% on September 7.
The clearest day of the month is September 30, with clear, mostly clear, or partly cloudy conditions 71% of the time.
For reference, on February 24, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 49%, while on October 5, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 72%.
Cloud Cover Categories in September
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Lone Star, the chance of a wet day over the course of September is essentially constant, remaining around 23% throughout.
For reference, the year's highest daily chance of a wet day is 37% on May 15, and its lowest chance is 22% on September 20.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Lone Star is rapidly increasing, starting the month at 2.3 inches, when it rarely exceeds 5.2 inches or falls below 0.5 inches, and ending the month at 3.4 inches, when it rarely exceeds 6.5 inches or falls below 0.8 inches.
Average Monthly Rainfall in September
Over the course of September in Lone Star, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 58 minutes, implying an average daily decrease of 2 minutes, 0 seconds, and weekly decrease of 13 minutes, 59 seconds.
The shortest day of the month is September 30, with 11 hours, 52 minutes of daylight and the longest day is September 1, with 12 hours, 50 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Lone Star is 6:53 AM on September 1 and the latest sunrise is 19 minutes later at 7:12 AM on September 30.
The latest sunset is 7:43 PM on September 1 and the earliest sunset is 39 minutes earlier at 7:04 PM on September 30.
Daylight saving time is observed in Lone Star 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 6:10 AM and sets 14 hours, 20 minutes later, at 8:30 PM, while on December 21, the shortest day of the year, it rises at 7:17 AM and sets 9 hours, 59 minutes later, at 5:16 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Lone Star is very rapidly decreasing during September, falling from 76% to 36% over the course of the month.
For reference, on July 14, the muggiest day of the year, there are muggy conditions 93% of the time, while on January 28, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in September
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Lone Star is gradually increasing during September, increasing from 5.5 miles per hour to 6.1 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 8.0 miles per hour, while on August 16, the calmest day of the year, the daily average wind speed is 5.2 miles per hour.
Average Wind Speed in September
Wind Direction in September
The growing season in Lone Star typically lasts for 8.4 months (258 days), from around March 6 to around November 19, rarely starting before February 10 or after March 30, and rarely ending before October 30 or after December 8.
The month of September in Lone Star 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 Lone Star are rapidly increasing during September, increasing by 724°F, from 4,338°F to 5,062°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Lone Star is gradually decreasing during September, falling by 0.7 kWh, from 5.8 kWh to 5.1 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 Lone Star are 32.944 deg latitude, -94.707 deg longitude, and 325 ft elevation.
The topography within 2 miles of Lone Star contains only modest variations in elevation, with a maximum elevation change of 233 feet and an average elevation above sea level of 327 feet. Within 10 miles also contains only modest variations in elevation (384 feet). Within 50 miles contains only modest variations in elevation (525 feet).
The area within 2 miles of Lone Star is covered by trees (46%), water (35%), and artificial surfaces (11%), within 10 miles by trees (54%) and cropland (29%), and within 50 miles by cropland (46%) and trees (38%).
This report illustrates the typical weather in Lone Star 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 Lone Star.
For each station, the records are corrected for the elevation difference between that station and Lone Star 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 Lone Star is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Lone Star and a given station.
The stations contributing to this reconstruction are: Mount Pleasant, Mount Pleasant Regional Airport (44%, 29 kilometers, northwest); Gilmer, Fox Stephens Field - Gilmer Municipal Airport (33%, 35 kilometers, southwest); Harrison County Airport (15%, 60 kilometers, southeast); and Texarkana Regional Airport (9%, 86 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .