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Average Weather in Austin Texas, United States

In Austin, the summers are hot and oppressive; the winters are short, cold, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 43°F to 97°F and is rarely below 30°F or above 102°F.

The hot season lasts for 3.6 months, from June 2 to September 20, with an average daily high temperature above 89°F. The hottest day of the year is August 6, with an average high of 97°F and low of 75°F.

The cool season lasts for 2.9 months, from November 26 to February 23, with an average daily high temperature below 69°F. The coldest day of the year is January 6, with an average low of 43°F and high of 61°F.

Average High and Low Temperature

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 Austin12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDeccoldcoolcomfortablewarmhotswelteringchilly
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

In Austin, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year in Austin begins around May 13 and lasts for 1.9 months, ending around July 11. On June 13, 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 July 11 and lasts for 10 months, ending around May 13. On January 3, the cloudiest day of the year, the sky is overcast or mostly cloudy 45% of the time, and clear, mostly clear, or partly cloudy 55% of the time.

Cloud Cover

Cloud Cover in Austinclearercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJan 345%Jan 345%Jun 1328%Jun 1328%May 1337%May 1337%Jul 1137%Jul 1137%overcastmostly cloudypartly cloudymostly clearclear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

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

The wetter season lasts 4.5 months, from April 30 to September 15, with a greater than 24% chance of a given day being a wet day. The chance of a wet day peaks at 35% on May 27.

The drier season lasts 7.5 months, from September 15 to April 30. The smallest chance of a wet day is 14% on January 1.

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 35% on May 27.

Daily Chance of Precipitation

Daily Chance of Precipitation in Austinwetdrydry0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecMay 2735%May 2735%Jan 114%Jan 114%Sep 1524%Sep 1524%rainsnow
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. Austin experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Austin. The most rain falls during the 31 days centered around May 25, with an average total accumulation of 3.9 inches.

The least rain falls around August 1, with an average total accumulation of 1.3 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 Austin varies significantly over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 12 minutes of daylight; the longest day is June 21, with 14 hours, 6 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 6:28 AM on June 10, and the latest sunrise is 1 hour, 19 minutes later at 7:47 AM on November 4. The earliest sunset is at 5:30 PM on December 2, and the latest sunset is 3 hours, 7 minutes later at 8:36 PM on June 30.

Daylight saving time (DST) is observed in Austin during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in Austin2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecJun 106:28 AMJun 106:28 AM8:36 PMJun 308:36 PMJun 30Dec 25:30 PMDec 25:30 PM7:47 AMNov 47:47 AMNov 4Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnight
The solar day over the course of the year 2017. 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.

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.

Austin experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 6.4 months, from April 16 to October 27, during which time the comfort level is muggy, oppressive, or miserable at least 24% of the time. The muggiest day of the year is July 3, with muggy conditions 89% of the time.

The least muggy day of the year is January 21, with muggy conditions 2% of the time.

Humidity Comfort Levels

Humidity Comfort Levels in Austinmuggy0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJan 212%Jan 212%89%Jul 389%Jul 3Apr 1624%Apr 1624%Oct 2724%Oct 2724%miserablemiserableoppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

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 Austin experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 7.4 months, from October 30 to June 11, with average wind speeds of more than 5.1 miles per hour. The windiest day of the year is April 2, with an average hourly wind speed of 5.9 miles per hour.

The calmer time of year lasts for 4.6 months, from June 11 to October 30. The calmest day of the year is September 5, with an average hourly wind speed of 4.3 miles per hour.

Average Wind Speed

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 Austin varies throughout the year.

The wind is most often from the south for 10 months, from February 3 to December 9, with a peak percentage of 78% on July 15. The wind is most often from the north for 1.8 months, from December 9 to February 3, with a peak percentage of 40% on January 1.

Wind Direction

Wind Direction in AustinNSN0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecwestsoutheastnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

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 4.2 months, from April 12 to August 19, with an average daily incident shortwave energy per square meter above 6.2 kWh. The brightest day of the year is June 14, with an average of 7.0 kWh.

The darker period of the year lasts for 2.8 months, from November 11 to February 4, with an average daily incident shortwave energy per square meter below 3.9 kWh. The darkest day of the year is December 19, with an average of 3.1 kWh.

Average Daily Incident Shortwave Solar Energy

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 Austin are 30.267 deg latitude, -97.743 deg longitude, and 545 ft elevation.

The topography within 2 miles of Austin contains only modest variations in elevation, with a maximum elevation change of 190 feet and an average elevation above sea level of 510 feet. Within 10 miles contains only modest variations in elevation (712 feet). Within 50 miles contains significant variations in elevation (1,657 feet).

The area within 2 miles of Austin is covered by artificial surfaces (100%), within 10 miles by artificial surfaces (51%) and trees (18%), and within 50 miles by cropland (30%) and shrubs (26%).

Data Sources

This report illustrates the typical weather in Austin, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Austin.

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

The stations contributing to this reconstruction are: Austin City, Austin Camp Mabry (61%, 6 kilometers, north) and Bergstrom AFB / Austi (39%, 9 kilometers, southeast).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports 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.