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Average Weather in Cactus Texas, United States

In Cactus, the summers are long, sweltering, oppressive, and windy; 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 46°F to 99°F and is rarely below 35°F or above 104°F.

Based on the beach/pool score, the best times of year to visit Cactus for hot-weather activities are from early May to mid July and from late August to late September.

Climate Summary

comfortablewarmhotswelteringhotwarmcomfortableJanFebMarAprMayJunJulAugSepOctNovDecNowNow77%77%54%54%clearovercastprecipitation: 2.4 inprecipitation: 2.4 in0.7 in0.7 inmuggy: 84%muggy: 84%1%1%drydrybeach/pool score: 6.8beach/pool score: 6.81.01.0
Click on each chart for more information.

Temperature

The hot season lasts for 4.0 months, from May 17 to September 16, with an average daily high temperature above 92°F. The hottest day of the year is August 6, with an average high of 99°F and low of 77°F.

The cool season lasts for 2.6 months, from November 27 to February 16, with an average daily high temperature below 73°F. The coldest day of the year is January 5, with an average low of 46°F and high of 66°F.

Average High and Low Temperature

Average High and Low Temperature in CactushotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FJan 566°FJan 566°FAug 699°FAug 699°F46°F46°F77°F77°FMay 1792°FMay 1792°FSep 1692°FSep 1692°FNov 2773°FNov 2773°FFeb 1673°FFeb 1673°F71°F71°F73°F73°F54°F54°F51°F51°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

Average Hourly Temperature in CactusJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowcoldcoldcoolcoolcomfortablewarmhotswelteringcoldcomfortablecold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Manfalūţ, Egypt (7,407 miles away) is the far-away foreign place with temperatures most similar to Cactus (view comparison).

Clouds

In Cactus, 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 Cactus begins around May 5 and lasts for 1.8 months, ending around June 30. On June 4, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 77% of the time, and overcast or mostly cloudy 23% of the time.

The cloudier part of the year begins around June 30 and lasts for 10 months, ending around May 5. 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

Cloud Cover Categories in CactusclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jun 477%Jun 477%Jan 554%Jan 554%May 566%May 566%NowNowclearpartly cloudymostly cloudyovercastmostly clear
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Cactus varies throughout the year.

The wetter season lasts 5.6 months, from April 27 to October 14, with a greater than 18% chance of a given day being a wet day. The chance of a wet day peaks at 28% on September 6.

The drier season lasts 6.4 months, from October 14 to April 27. The smallest chance of a wet day is 7% on December 14.

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 September 6.

Daily Chance of Precipitation

Daily Chance of Precipitation in CactuswetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Sep 628%Sep 628%Dec 147%Dec 147%Apr 2718%Apr 2718%Oct 1418%Oct 1418%NowNowrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

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. Cactus experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Cactus. The most rain falls during the 31 days centered around May 22, with an average total accumulation of 2.4 inches.

The least rain falls around December 17, with an average total accumulation of 0.7 inches.

Average Monthly Rainfall

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

The length of the day in Cactus varies over the course of the year. In 2021, the shortest day is December 21, with 10 hours, 22 minutes of daylight; the longest day is June 20, with 13 hours, 55 minutes of daylight.

Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 6:40 AM on June 10, and the latest sunrise is 1 hour, 12 minutes later at 7:52 AM on November 6. The earliest sunset is at 5:41 PM on December 1, and the latest sunset is 2 hours, 56 minutes later at 8:37 PM on June 30.

Daylight saving time (DST) is observed in Cactus during 2021, starting in the spring on March 14, lasting 7.8 months, and ending in the fall on November 7.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in CactusJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 106:40 AMJun 106:40 AM8:37 PMJun 308:37 PMJun 30Dec 15:41 PMDec 15:41 PM7:52 AMNov 67:52 AMNov 6Mar 14DSTMar 14DSTDSTNov 7DSTNov 7daynightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Moon

The figure below presents a compact representation of key lunar data for 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Cactus experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 7.0 months, from April 4 to November 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 June 26, with muggy conditions 84% of the time.

The least muggy day of the year is January 22, with muggy conditions 1% of the time.

Humidity Comfort Levels

Humidity Comfort Levels in CactusmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 221%Jan 221%84%Jun 2684%Jun 26Apr 422%Apr 422%Nov 522%Nov 522%NowNowoppressiveoppressivemuggymuggyhumidhumiddrydrymiserablemiserable
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Cactus experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.7 months, from March 3 to August 27, with average wind speeds of more than 10.2 miles per hour. The windiest day of the year is July 13, with an average hourly wind speed of 12.1 miles per hour.

The calmer time of year lasts for 6.3 months, from August 27 to March 3. The calmest day of the year is January 1, with an average hourly wind speed of 8.4 miles per hour.

Average Wind Speed

Average Wind Speed in CactuswindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphJul 1312.1 mphJul 1312.1 mphJan 18.4 mphJan 18.4 mphMar 310.2 mphMar 310.2 mphAug 2710.2 mphAug 2710.2 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Cactus varies throughout the year.

The wind is most often from the south for 1.4 months, from January 21 to March 1; for 2.1 months, from June 12 to August 15; and for 1.5 months, from October 25 to December 10, with a peak percentage of 56% on July 18. The wind is most often from the east for 3.4 months, from March 1 to June 12 and for 2.3 months, from August 15 to October 25, with a peak percentage of 55% on September 8. The wind is most often from the north for 1.4 months, from December 10 to January 21, with a peak percentage of 33% on January 1.

Wind Direction

Wind Direction in CactusNSESESNJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowsoutheastnorthwest
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in Cactus 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 Cactus for general outdoor tourist activities are from mid March to late May and from late September to mid November, with a peak score in the third week of October.

Tourism Score

Tourism Score in Cactusbest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.66.63.33.36.56.54.54.5NowNowprecipitationprecipitationcloudsclouds tourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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 Cactus for hot-weather activities are from early May to mid July and from late August to late September, with a peak score in the first week of June.

Beach/Pool Score

Beach/Pool Score in Cactusbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.86.81.01.06.36.3NowNowprecipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

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.

Growing Season

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Cactus typically lasts for 11 months (343 days), from around January 20 to around December 30, rarely starting after February 23, or ending before December 1.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Cactusgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Jan 2050%Jan 2050%Dec 3050%Dec 3090%Feb 2390%Feb 2390%Dec 190%Dec 1Jul 18100%Jul 18100%NowNowvery coldcoldcoolwarmhotswelteringcomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Cactus should appear around January 13, only rarely appearing before January 8 or after January 22.

Growing Degree Days

Growing Degree Days in CactusJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°F6,000°F6,000°F7,000°F7,000°F8,000°F8,000°FJan 1390°FJan 1390°FMar 22900°FMar 22900°FMay 11,800°FMay 11,800°FDec 318,071°FDec 318,071°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

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 3.9 months, from April 14 to August 11, with an average daily incident shortwave energy per square meter above 6.5 kWh. The brightest day of the year is June 13, with an average of 7.3 kWh.

The darker period of the year lasts for 2.6 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 3.4 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in CactusbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 137.3 kWhJun 137.3 kWhDec 193.4 kWhDec 193.4 kWhApr 146.5 kWhApr 146.5 kWhAug 116.5 kWhAug 116.5 kWhFeb 24.1 kWhFeb 24.1 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Cactus are 27.907 deg latitude, -99.394 deg longitude, and 581 ft elevation.

The topography within 2 miles of Cactus contains only modest variations in elevation, with a maximum elevation change of 157 feet and an average elevation above sea level of 594 feet. Within 10 miles also contains only modest variations in elevation (433 feet). Within 50 miles contains only modest variations in elevation (791 feet).

The area within 2 miles of Cactus is covered by shrubs (50%) and grassland (50%), within 10 miles by shrubs (61%) and grassland (39%), and within 50 miles by shrubs (73%) and grassland (21%).

Data Sources

This report illustrates the typical weather in Cactus, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Cactus.

For each station, the records are corrected for the elevation difference between that station and Cactus 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 Cactus is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Cactus and a given station.

The stations contributing to this reconstruction are: Laredo International Airport (58%, 42 kilometers, south); Cotulla–La Salle County Airport (32%, 64 kilometers, north); and Piedras Negras International Airport (10%, 138 kilometers, northwest).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

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.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.