Mason County Climate
Mason County, Texas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
66.0°F
Annual Precip
28.9"
Annual Snowfall
—
Extreme Heat Days
113
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
6,330
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Mason County
Climate Verdict
Mason County has a warm, averaging 66.0°F year-round, moderate rainfall of 28.9 inches per year, significant summer heat with 113.3 days annually above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 47.3°F. summers are hot, with July averaging 83.1°F. The 36°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Mason County closely matches the Texas statewide average temperature of 65.5°F, it is somewhat drier than average for Texas.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.