Granbury (TX) Temperature by Month

The average annual maximum temperature in Granbury, Texas, United States of America is 26°C (79°F), with daytime highs ranging from 15°C (59°F) in January to 37°C (99°F) in August. This page covers monthly averages, day-night differences, and how Granbury compares to cities worldwide.

With significant temperature fluctuations, Granbury enjoys distinct seasons year-round. Nighttime lows range from 24°C (75°F) in August to 0°C (32°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Granbury by month:

Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM. August, the warmest month, sees 310 hours of sunshine.

The chart below shows the average temperature throughout the year:

Granbury's average annual maximum temperature is 26°C (79°F). To put that in context, here's how it compares to a few well-known destinations:

Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.

Queenstown, New Zealand averages 10°C (50°F) annually, remember seasons are flipped, so its coldest months fall in June and July.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Granbury this rarely lasts long on the ground.

For more on Granbury's weather, including monthly rainfall, sunshine hours, and humidity, visit our Granbury climate page.