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Average Weather in Fredericksburg Texas, United States

In Fredericksburg, the temperature typically varies from 36°F to 93°F over the course of the year, and is rarely below 24°F or above 98°F.

The hot season lasts for 3.5 months, from June 1 to September 16, with an average daily high temperature above 86°F. The hottest day of the year is August 6, with an average high of 93°F and low of 71°F.

The cool season lasts for 2.9 months, from November 24 to February 22, with an average daily high temperature below 66°F. The coldest day of the year is January 6, with an average low of 36°F and high of 59°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature with percentile bands, 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

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecchillychillycoldcoldcoolcoolcomfortablecomfortablewarmwarmhothot
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.


The length of the day in Fredericksburg 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 6:33 AM on June 10, and the latest sunrise is 1 hour, 19 minutes later at 7:52 AM on November 4. The earliest sunset is at 5:34 PM on December 2, and the latest sunset is 3 hours, 7 minutes later at 8:41 PM on June 30.

Daylight saving time (DST) is observed in Fredericksburg 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

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.


In Fredericksburg, 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 Fredericksburg begins around May 3 and lasts for 2.3 months, ending around July 13. On June 15, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 73% of the time, and overcast or mostly cloudy 27% of the time.

The cloudier part of the year begins around July 13 and lasts for 9.7 months, ending around May 3. On February 11, 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

clearerclearercloudiercloudiercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecFeb 1145%Feb 1145%Jun 1527%Jun 1527%May 336%May 336%Jul 1336%Jul 1336%overcastovercastmostly cloudymostly cloudymostly clearmostly clearclearclear
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.


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

The wetter season lasts 4.6 months, from April 27 to September 15, with a greater than 23% chance of a given day being a wet day. The chance of a wet day peaks at 34% on May 27.

The drier season lasts 7.4 months, from September 15 to April 27. The smallest chance of a wet day is 13% on December 16.

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 34% on May 27.

Daily Chance of Precipitation

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).


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 in the year. Fredericksburg experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Fredericksburg. The most rain falls during the 31 days centered around May 25, with an average total accumulation of 3.8 inches.

The least rain falls around August 2, with and average total accumulation of 1.2 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.


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.

Fredericksburg experiences very significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 5.9 months, from April 24 to October 21, during which time the comfort level is muggy, oppressive, or miserable at least 16% of the time. The muggiest day of the year is June 24, with muggy conditions 62% of the time.

The least muggy day of the year is December 27, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

muggymuggy0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecDec 270%Dec 270%Jun 2462%Jun 2462%Apr 2417%Apr 2417%Oct 2116%Oct 2116%oppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydry
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.


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 Fredericksburg experiences mildly seasonal variation over the course of the year.

The windier part of the year lasts for 5.8 months, from January 14 to July 8, with average wind speeds of more than 5.4 miles per hour. The windiest day of the year is April 2, with an average hourly wind speed of 6.3 miles per hour.

The calmer time of year lasts for 6.2 months, from July 8 to January 14. The calmest day of the year is September 8, with an average hourly wind speed of 4.6 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 Fredericksburg is from the south throughout the year.

Wind Direction

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 4.3 months, from April 11 to August 19, with an average daily incident shortwave energy per square meter above 6.3 kWh. The brightest day of the year is June 28, with an average of 7.1 kWh.

The darker period of the year lasts for 2.8 months, from November 10 to February 4, with an average daily incident shortwave energy per square meter below 4.0 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.


For the purposes of this report, the geographical coordinates of Fredericksburg are 30.275 deg latitude, -98.872 deg longitude, and 1,726 ft elevation.

The topography within 2 miles of Fredericksburg contains only modest variations in elevation, with a maximum elevation change of 344 feet, and an average elevation above sea level of 1,723 feet. Within 10 miles contains significant variations in elevation (732 feet). Within 50 miles contains very significant variations in elevation (1,713 feet).

The area within 2 miles of Fredericksburg is covered by grassland (57%), cropland (18%), and artificial surfaces (15%), within 10 miles by grassland (57%) and shrubs (31%), and within 50 miles by shrubs (50%) and grassland (30%).

Data Sources

This report illustrates the typical weather in Fredericksburg, 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 Fredericksburg.

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

The stations contributing to this reconstruction are: Gillespie County Airport (95%, 5.1 kilometers, southwest), Horseshoe Bay Resort Airport (2.5%, 56 kilometers, northeast), and Llano Municipal Airport (2.3%, 60 kilometers, north).

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 .