Average Weather at Cotulla–La Salle County Airport Texas, United States
At Cotulla–La Salle County Airport, the summers are long, sweltering, and muggy; the winters are short, cool, and dry; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 44°F to 99°F and is rarely below 32°F or above 104°F.
Based on the beach/pool score, the best times of year to visit Cotulla–La Salle County Airport for hot-weather activities are from mid May to late July and from late August to late September.
The hot season lasts for 3.9 months, from May 21 to September 17, with an average daily high temperature above 92°F. The hottest day of the year is August 5, with an average high of 99°F and low of 75°F.
The cool season lasts for 2.7 months, from November 26 to February 18, with an average daily high temperature below 72°F. The coldest day of the year is January 6, with an average low of 44°F and high of 66°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
At Cotulla–La Salle County Airport, 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 at Cotulla–La Salle County Airport begins around May 6 and lasts for 1.9 months, ending around July 2. On June 11, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 76% of the time, and overcast or mostly cloudy 24% of the time.
The cloudier part of the year begins around July 2 and lasts for 10 months, ending around May 6. On January 5, the cloudiest day of the year, the sky is overcast or mostly cloudy 46% of the time, and clear, mostly clear, or partly cloudy 54% 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 at Cotulla–La Salle County Airport varies throughout the year.
The wetter season lasts 5.9 months, from April 26 to October 23, with a greater than 18% chance of a given day being a wet day. The chance of a wet day peaks at 28% on May 21.
The drier season lasts 6.1 months, from October 23 to April 26. The smallest chance of a wet day is 8% on December 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 28% on May 21.
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. Cotulla–La Salle County Airport experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year at Cotulla–La Salle County Airport. The most rain falls during the 31 days centered around May 24, with an average total accumulation of 2.7 inches.
The least rain falls around December 17, with an average total accumulation of 0.8 inches.
Average Monthly Rainfall
The length of the day at Cotulla–La Salle County Airport varies over the course of the year. In 2018, the shortest day is December 21, with 10 hours, 20 minutes of daylight; the longest day is June 21, with 13 hours, 57 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:38 AM on June 10, and the latest sunrise is 1 hour, 12 minutes later at 7:50 AM on March 11. The earliest sunset is at 5:39 PM on December 1, and the latest sunset is 2 hours, 59 minutes later at 8:38 PM on July 1.
Daylight saving time (DST) is observed at Cotulla–La Salle County Airport 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
Cotulla–La Salle County Airport experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 6.8 months, from April 7 to November 1, during which time the comfort level is muggy, oppressive, or miserable at least 21% of the time. The muggiest day of the year is July 13, with muggy conditions 83% of the time.
The least muggy day of the year is January 20, with muggy conditions 1% of the time.
Humidity Comfort Levels
The average hourly wind speed at Cotulla–La Salle County Airport experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 5.9 months, from February 28 to August 25, with average wind speeds of more than 9.6 miles per hour. The windiest day of the year is July 2, with an average hourly wind speed of 11.0 miles per hour.
The calmer time of year lasts for 6.1 months, from August 25 to February 28. The calmest day of the year is January 10, with an average hourly wind speed of 8.1 miles per hour.
Average Wind Speed
The predominant average hourly wind direction at Cotulla–La Salle County Airport varies throughout the year.
The wind is most often from the east for 4.9 months, from January 21 to June 17 and for 2.6 months, from August 17 to November 4, with a peak percentage of 54% on September 8. The wind is most often from the south for 2.0 months, from June 17 to August 17 and for 1.2 months, from November 4 to December 10, with a peak percentage of 56% on July 24. The wind is most often from the north for 1.4 months, from December 10 to January 21, with a peak percentage of 31% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is at Cotulla–La Salle County Airport 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 Cotulla–La Salle County Airport for general outdoor tourist activities are from late March to late May and from late September to mid November, with a peak score in the second week of October.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit Cotulla–La Salle County Airport for hot-weather activities are from mid May to late July and from late August to late September, with a peak score in the first week of June.
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 at Cotulla–La Salle County Airport typically lasts for 10 months (309 days), from around February 5 to around December 10, rarely starting after March 10, or ending before November 20.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms at Cotulla–La Salle County Airport should appear around January 14, only rarely appearing before January 9 or after January 24.
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 4.0 months, from April 13 to August 13, with an average daily incident shortwave energy per square meter above 6.4 kWh. The brightest day of the year is June 14, with an average of 7.2 kWh.
The darker period of the year lasts for 2.7 months, from November 12 to February 2, with an average daily incident shortwave energy per square meter below 4.1 kWh. The darkest day of the year is December 19, with an average of 3.3 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Cotulla–La Salle County Airport are 28.458 deg latitude, -99.220 deg longitude, and 456 ft elevation.
The topography within 2 miles of Cotulla–La Salle County Airport contains only modest variations in elevation, with a maximum elevation change of 148 feet and an average elevation above sea level of 450 feet. Within 10 miles also contains only modest variations in elevation (269 feet). Within 50 miles contains only modest variations in elevation (787 feet).
The area within 2 miles of Cotulla–La Salle County Airport is covered by shrubs (73%), grassland (16%), and cropland (11%), within 10 miles by shrubs (71%) and grassland (21%), and within 50 miles by shrubs (67%) and grassland (21%).
This report illustrates the typical weather at Cotulla–La Salle County Airport, 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
Cotulla–La Salle County Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.
In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.
The stations on which we may fall back include but are not limited to Pleasanton Municipal Airport, Hondo Municipal Airport, Garner Field Airport, Laredo International Airport, Kelly Field Annex, Stinson Municipal Airport, Jim Hogg County Airport, and San Antonio International Airport.
Time zones for aiports and weather stations are provided by AskGeo.com .