Average Weather in September in Shepherd Texas, United States
Daily high temperatures decrease by 6°F, from 92°F to 85°F, rarely falling below 78°F or exceeding 97°F.
Daily low temperatures decrease by 8°F, from 71°F to 63°F, rarely falling below 53°F or exceeding 75°F.
For reference, on August 5, the hottest day of the year, temperatures in Shepherd typically range from 73°F to 94°F, while on January 7, the coldest day of the year, they range from 42°F to 61°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 Shepherd experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 43% to 32%.
The clearest day of the month is September 30, with clear, mostly clear, or partly cloudy conditions 68% of the time.
For reference, on January 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 49%, while on October 9, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 70%.
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 Shepherd, the chance of a wet day over the course of September is very rapidly decreasing, starting the month at 35% and ending it at 24%.
For reference, the year's highest daily chance of a wet day is 41% on June 18, and its lowest chance is 24% on April 15.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Shepherd is essentially constant, remaining about 3.6 inches throughout, and rarely exceeding 7.5 inches or falling below 0.9 inches.
Average Monthly Rainfall in September
Over the course of September in Shepherd, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 53 minutes, implying an average daily decrease of 1 minute, 49 seconds, and weekly decrease of 12 minutes, 43 seconds.
The shortest day of the month is September 30, with 11 hours, 53 minutes of daylight and the longest day is September 1, with 12 hours, 46 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Shepherd is 6:56 AM on September 1 and the latest sunrise is 16 minutes later at 7:12 AM on September 30.
The latest sunset is 7:42 PM on September 1 and the earliest sunset is 36 minutes earlier at 7:06 PM on September 30.
Daylight saving time is observed in Shepherd 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 6:18 AM and sets 14 hours, 7 minutes later, at 8:25 PM, while on December 21, the shortest day of the year, it rises at 7:12 AM and sets 10 hours, 11 minutes later, at 5:23 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Shepherd is very rapidly decreasing during September, falling from 89% to 52% over the course of the month.
For reference, on July 23, the muggiest day of the year, there are muggy conditions 98% of the time, while on January 23, the least muggy day of the year, there are muggy conditions 3% 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 Shepherd is essentially constant during September, remaining within 0.2 miles per hour of 3.7 miles per hour throughout.
For reference, on April 2, the windiest day of the year, the daily average wind speed is 5.1 miles per hour, while on August 18, the calmest day of the year, the daily average wind speed is 3.4 miles per hour.
Average Wind Speed in September
Wind Direction in September
Shepherd is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in Shepherd is decreasing during September, falling by 5°F, from 85°F to 80°F, over the course of the month.
Average Water Temperature in September
The growing season in Shepherd typically lasts for 9.0 months (271 days), from around February 26 to around November 24, rarely starting before January 27 or after March 23, and rarely ending before November 1 or after December 18.
The month of September in Shepherd 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 Shepherd are rapidly increasing during September, increasing by 763°F, from 4,795°F to 5,558°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Shepherd is essentially constant during September, remaining within 0.2 kWh of 5.4 kWh throughout.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Shepherd are 30.498 deg latitude, -94.997 deg longitude, and 141 ft elevation.
The topography within 2 miles of Shepherd contains only modest variations in elevation, with a maximum elevation change of 102 feet and an average elevation above sea level of 139 feet. Within 10 miles also contains only modest variations in elevation (338 feet). Within 50 miles contains only modest variations in elevation (502 feet).
The area within 2 miles of Shepherd is covered by herbaceous vegetation (56%), trees (22%), cropland (11%), and artificial surfaces (11%), within 10 miles by herbaceous vegetation (46%) and trees (33%), and within 50 miles by trees (42%) and herbaceous vegetation (28%).
This report illustrates the typical weather in Shepherd 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 Shepherd.
For each station, the records are corrected for the elevation difference between that station and Shepherd 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 Shepherd is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Shepherd and a given station.
The stations contributing to this reconstruction are: Montgomery County Airport (39%, 43 kilometers, west); Huntsville Municipal Airport (22%, 63 kilometers, northwest); Angelina County Airport (14%, 85 kilometers, north); Beaumont Municipal Airport (13%, 89 kilometers, southeast); and Jasper, Jasper County-Bell Field Airport (11%, 102 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .