Mason County Climate
Mason County, Texas
Avg Annual Temp
66.0°F
Annual Precip
28.9"
Annual Snowfall
—
Extreme Heat Days
113.3
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Mason County Weather
Warmer than the national average
Mason County averages 66.0°F annually, placing it significantly higher than the national median temperature. This semi-arid climate defines the Hill Country experience with plenty of sunshine and dry heat.
Tracking with the Texas average
The county's 66.0°F average sits just above the Texas state average of 65.5°F. It represents the standard warm profile found in the central part of the state.
A wetter alternative to western neighbors
With 28.9 inches of annual precipitation, Mason is wetter than neighbor Menard County, which sees only 24.4 inches. However, Mason endures 113 extreme heat days, more than McCulloch's 107.
Mild winters and long, hot summers
Summer temperatures average 82.2°F, contributing to 113 days per year that exceed 90°F. Winters are mild with an average of 49.3°F, and though snowfall data is limited, significant accumulation is rare.
Prepare for the Hill Country heat
High-efficiency HVAC systems are a necessity for the nearly four months of temperatures over 90°F. Residents should also invest in drought-resistant landscaping to accommodate the moderate 28.9 inches of annual rain.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.