Average Weather in December in De Kalb Texas, United States
Daily high temperatures decrease by 6°F, from 60°F to 54°F, rarely falling below 39°F or exceeding 73°F.
Daily low temperatures decrease by 6°F, from 41°F to 36°F, rarely falling below 23°F or exceeding 56°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 December
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on December. 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 December
The month of December in De Kalb experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 43% to 48%.
The clearest day of the month is December 4, with clear, mostly clear, or partly cloudy conditions 57% 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 December
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 De Kalb, the chance of a wet day over the course of December is decreasing, starting the month at 27% and ending it at 23%.
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.
Over the course of December in De Kalb, the chance of a day with only rain decreases from 26% to 20%, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 1% throughout.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in De Kalb is rapidly decreasing, starting the month at 4.4 inches, when it rarely exceeds 8.5 inches or falls below 1.0 inches, and ending the month at 3.3 inches, when it rarely exceeds 6.6 inches or falls below 0.9 inches.
Average Monthly Rainfall in December
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day liquid-equivalent snowfall during December in De Kalb is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.4 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in De Kalb, the length of the day is essentially constant. The shortest day of the month is December 22, with 9 hours, 56 minutes of daylight and the longest day is December 1, with 10 hours, 6 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in De Kalb is 7:04 AM on December 1 and the latest sunrise is 18 minutes later at 7:22 AM on December 31.
The earliest sunset is 5:10 PM on December 4 and the latest sunset is 11 minutes later at 5:20 PM on December 31.
Daylight saving time is observed in De Kalb during 2018, but it neither starts nor ends during December, so the entire month is in standard 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 and Daylight Saving Time in December
The chance that a given day will be muggy in De Kalb is essentially constant during December, remaining around 1% throughout.
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 December
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in De Kalb is essentially constant during December, remaining within 0.1 miles per hour of 7.9 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 highest daily average wind speed during December is 8.0 miles per hour on December 10.
Average Wind Speed in December
Wind Direction in December
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 December in De Kalb is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season decreasing from 16% to 1% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in December
The average accumulated growing degree days in De Kalb are gradually increasing during December, increasing by 101°F, from 5,612°F to 5,713°F, over the course of the month.
Growing Degree Days in December
The average daily incident shortwave solar energy in De Kalb is essentially constant during December, remaining within 0.1 kWh of 2.7 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 2.6 kWh on December 23.
Average Daily Incident Shortwave Solar Energy in December
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).
Time zones for aiports and weather stations are provided by AskGeo.com .