Average Weather in August in De Kalb Texas, United States
Daily high temperatures decrease by 2°F, from 94°F to 91°F, rarely falling below 83°F or exceeding 100°F. The highest daily average high temperature is 94°F on August 3.
Daily low temperatures decrease by 3°F, from 73°F to 70°F, rarely falling below 63°F or exceeding 77°F.
For reference, on July 31, the hottest day of the year, temperatures in De Kalb typically range from 73°F to 94°F, while on January 8, the coldest day of the year, they range from 35°F to 54°F.
Average High and Low Temperature in August
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. 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 August
The month of August in De Kalb experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 33% throughout the month.
The clearest day of the month is August 2, with clear, mostly clear, or partly cloudy conditions 68% 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 August
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In De Kalb, the chance of a wet day over the course of August is essentially constant, remaining around 24% throughout.
For reference, the year's highest daily chance of a wet day is 39% on May 16, and its lowest chance is 21% on January 13.
Probability of Precipitation in August
The average sliding 31-day rainfall during August in De Kalb is essentially constant, remaining about 2.3 inches throughout, and rarely exceeding 5.6 inches or falling below 0.4 inches.
The lowest average 31-day accumulation is 2.1 inches on August 15.
Average Monthly Rainfall in August
Over the course of August in De Kalb, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 54 minutes, implying an average daily decrease of 1 minute, 48 seconds, and weekly decrease of 12 minutes, 38 seconds.
The shortest day of the month is August 31, with 12 hours, 53 minutes of daylight and the longest day is August 1, with 13 hours, 47 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in De Kalb is 6:30 AM on August 1 and the latest sunrise is 21 minutes later at 6:51 AM on August 31.
The latest sunset is 8:18 PM on August 1 and the earliest sunset is 33 minutes earlier at 7:45 PM on August 31.
Daylight saving time is observed in De Kalb during 2018, but it neither starts nor ends during August, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:08 AM and sets 14 hours, 23 minutes later, at 8:31 PM, while on December 21, the shortest day of the year, it rises at 7:18 AM and sets 9 hours, 56 minutes later, at 5:14 PM.
Sunrise & Sunset with Twilight in August
The chance that a given day will be muggy in De Kalb is rapidly decreasing during August, falling from 86% to 68% over the course of the month.
For reference, on July 15, the muggiest day of the year, there are muggy conditions 89% 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 August
The average hourly wind speed in De Kalb is essentially constant during August, remaining within 0.2 miles per hour of 6.0 miles per hour throughout.
For reference, on April 2, the windiest day of the year, the daily average wind speed is 9.0 miles per hour, while on August 16, the calmest day of the year, the daily average wind speed is 5.9 miles per hour.
The lowest daily average wind speed during August is 5.9 miles per hour on August 16.
Average Wind Speed in August
Wind Direction in August
The growing season in De Kalb typically lasts for 8.1 months (249 days), from around March 12 to around November 17, rarely starting before February 18 or after April 7, and rarely ending before October 29 or after December 5.
The month of August in De Kalb is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in August
The average accumulated growing degree days in De Kalb are rapidly increasing during August, increasing by 895°F, from 3,278°F to 4,172°F, over the course of the month.
Growing Degree Days in August
The average daily incident shortwave solar energy in De Kalb is gradually decreasing during August, falling by 0.8 kWh, from 6.6 kWh to 5.8 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in August
For the purposes of this report, the geographical coordinates of De Kalb are 33.509 deg latitude, -94.616 deg longitude, and 367 ft elevation.
The topography within 2 miles of De Kalb is essentially flat, with a maximum elevation change of 92 feet and an average elevation above sea level of 376 feet. Within 10 miles is essentially flat (223 feet). Within 50 miles contains only modest variations in elevation (1,227 feet).
The area within 2 miles of De Kalb is covered by cropland (91%), within 10 miles by cropland (72%) and trees (23%), and within 50 miles by cropland (49%) and trees (38%).
This report illustrates the typical weather in De Kalb 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 De Kalb.
For each station, the records are corrected for the elevation difference between that station and De Kalb 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 De Kalb is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between De Kalb and a given station.
The stations contributing to this reconstruction are: Clarksville, Clarksville/Red River County-J D Trissell Field Airport (27%, 43 kilometers, west); Idabel, Mc Curtain County Regional Airport (22%, 50 kilometers, northwest); Mount Pleasant, Mount Pleasant Regional Airport (18%, 56 kilometers, southwest); Texarkana Regional Airport (18%, 57 kilometers, east); and J Lynn Helms Airport (15%, 63 kilometers, north).
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 .