Average Weather in Granbury Texas, United States
In Granbury, the summers are hot and muggy, the winters are cold and windy, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 36°F to 97°F and is rarely below 24°F or above 104°F.
Based on the beach/pool score, the best time of year to visit Granbury for hot-weather activities is from early June to mid September.
The hot season lasts for 3.5 months, from June 3 to September 17, with an average daily high temperature above 90°F. The hottest day of the year is July 26, with an average high of 97°F and low of 76°F.
The cool season lasts for 3.0 months, from November 25 to February 24, with an average daily high temperature below 66°F. The coldest day of the year is January 5, with an average low of 36°F and high of 58°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 Granbury, 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 Granbury begins around May 24 and lasts for 5.9 months, ending around November 19. On October 5, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 74% of the time, and overcast or mostly cloudy 26% of the time.
The cloudier part of the year begins around November 19 and lasts for 6.1 months, ending around May 24. On February 24, 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 Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Granbury varies throughout the year.
The wetter season lasts 6.2 months, from April 16 to October 22, with a greater than 25% chance of a given day being a wet day. The chance of a wet day peaks at 37% on May 27.
The drier season lasts 5.8 months, from October 22 to April 16. The smallest chance of a wet day is 13% 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 37% on May 27.
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. Granbury experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Granbury. The most rain falls during the 31 days centered around May 26, with an average total accumulation of 4.0 inches.
The least rain falls around January 14, with an average total accumulation of 1.4 inches.
Average Monthly Rainfall
The length of the day in Granbury varies significantly over the course of the year. In 2018, the shortest day is December 21, with 10 hours, 1 minute of daylight; the longest day is June 21, with 14 hours, 17 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:23 AM on June 11, and the latest sunrise is 1 hour, 27 minutes later at 7:50 AM on November 3. The earliest sunset is at 5:25 PM on December 4, and the latest sunset is 3 hours, 17 minutes later at 8:42 PM on June 29.
Daylight saving time (DST) is observed in Granbury 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
Granbury experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 5.5 months, from April 26 to October 9, during which time the comfort level is muggy, oppressive, or miserable at least 18% of the time. The muggiest day of the year is July 3, with muggy conditions 70% of the time.
The least muggy day of the year is January 16, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Granbury experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.5 months, from December 22 to June 8, with average wind speeds of more than 10.2 miles per hour. The windiest day of the year is April 2, with an average hourly wind speed of 12.0 miles per hour.
The calmer time of year lasts for 6.5 months, from June 8 to December 22. The calmest day of the year is August 23, with an average hourly wind speed of 8.3 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Granbury varies throughout the year.
The wind is most often from the south for 11 months, from February 4 to December 23, with a peak percentage of 74% on July 6. The wind is most often from the north for 1.3 months, from December 23 to February 4, with a peak percentage of 37% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Granbury 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 Granbury for general outdoor tourist activities are from mid April to early June and from early September to late October, with a peak score in the first 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 time of year to visit Granbury for hot-weather activities is from early June to mid September, with a peak score in the last 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 in Granbury typically lasts for 8.3 months (254 days), from around March 11 to around November 19, rarely starting before February 7 or after April 3, and rarely ending before October 29 or after December 10.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Granbury should appear around January 27, only rarely appearing before January 16 or after February 13.
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 4.3 months, from April 11 to August 20, with an average daily incident shortwave energy per square meter above 6.2 kWh. The brightest day of the year is June 30, with an average of 7.1 kWh.
The darker period of the year lasts for 2.9 months, from November 9 to February 4, with an average daily incident shortwave energy per square meter below 3.7 kWh. The darkest day of the year is December 21, with an average of 2.9 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Granbury are 32.442 deg latitude, -97.794 deg longitude, and 741 ft elevation.
The topography within 2 miles of Granbury contains only modest variations in elevation, with a maximum elevation change of 177 feet and an average elevation above sea level of 739 feet. Within 10 miles contains only modest variations in elevation (636 feet). Within 50 miles contains significant variations in elevation (1,280 feet).
The area within 2 miles of Granbury is covered by grassland (44%) and artificial surfaces (30%), within 10 miles by grassland (63%) and shrubs (13%), and within 50 miles by grassland (60%) and cropland (12%).
This report illustrates the typical weather in Granbury, 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 Granbury.
For each station, the records are corrected for the elevation difference between that station and Granbury 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 Granbury is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Granbury and a given station.
The stations contributing to this reconstruction are: Granbury Municipal Airport (97%, 2.2 kilometers, west); Cleburne Municipal Airport (1.7%, 35 kilometers, east); and Naval Air Station Joint Reserve Base Fort Worth (1.1%, 48 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .