Average Weather in De Kalb Texas, United States
In De Kalb, the summers are hot and muggy; the winters are short, cold, and wet; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 35°F to 94°F and is rarely below 23°F or above 100°F.
Based on the beach/pool score, the best time of year to visit De Kalb for hot-weather activities is from early June to mid September.
The hot season lasts for 3.6 months, from June 2 to September 20, with an average daily high temperature above 86°F. The hottest day of the year is July 31, with an average high of 94°F and low of 73°F.
The cool season lasts for 2.9 months, from November 26 to February 23, with an average daily high temperature below 62°F. The coldest day of the year is January 8, with an average low of 35°F and high of 54°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, 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 De Kalb, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in De Kalb begins around June 4 and lasts for 5.2 months, ending around November 12. On October 5, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 72% of the time, and overcast or mostly cloudy 28% of the time.
The cloudier part of the year begins around November 12 and lasts for 6.8 months, ending around June 4. On February 24, the cloudiest day of the year, the sky is overcast or mostly cloudy 49% of the time, and clear, mostly clear, or partly cloudy 51% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in De Kalb varies throughout the year.
The wetter season lasts 3.6 months, from March 14 to July 1, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 39% on May 16.
The drier season lasts 8.4 months, from July 1 to March 14. The smallest chance of a wet day is 21% on January 13.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 39% on May 16.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. De Kalb experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in De Kalb. The most rain falls during the 31 days centered around May 9, with an average total accumulation of 4.8 inches.
The least rain falls around August 15, with an average total accumulation of 2.1 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in De Kalb does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in De Kalb varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 56 minutes of daylight; the longest day is June 21, with 14 hours, 23 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:07 AM on June 12, and the latest sunrise is 1 hour, 31 minutes later at 7:39 AM on November 3. The earliest sunset is at 5:10 PM on December 4, and the latest sunset is 3 hours, 22 minutes later at 8:32 PM on June 29.
Daylight saving time (DST) is observed in De Kalb during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
De Kalb experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 5.0 months, from May 4 to October 5, during which time the comfort level is muggy, oppressive, or miserable at least 22% of the time. The muggiest day of the year is July 15, with muggy conditions 89% of the time.
The least muggy day of the year is January 24, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in De Kalb experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 7.0 months, from October 25 to May 25, with average wind speeds of more than 7.4 miles per hour. The windiest day of the year is April 2, with an average hourly wind speed of 9.0 miles per hour.
The calmer time of year lasts for 5.0 months, from May 25 to October 25. The calmest day of the year is August 16, with an average hourly wind speed of 5.9 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in De Kalb varies throughout the year.
The wind is most often from the east for 3.3 weeks, from September 7 to September 30, with a peak percentage of 38% on September 7. The wind is most often from the south for 11 months, from September 30 to September 7, with a peak percentage of 31% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in De Kalb throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit De Kalb for general outdoor tourist activities are from late April to mid June and from late August to mid October, with a peak score in the third week of September.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit De Kalb for hot-weather activities is from early June to mid September, with a peak score in the first week of July.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
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.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in De Kalb should appear around February 4, only rarely appearing before January 22 or after February 21.
Growing Degree Days
The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.
The brighter period of the year lasts for 4.5 months, from April 12 to August 29, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is July 4, with an average of 6.8 kWh.
The darker period of the year lasts for 2.9 months, from November 11 to February 6, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest day of the year is December 23, with an average of 2.6 kWh.
Average Daily Incident Shortwave Solar Energy
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, 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 .