Johnson County Climate
Johnson County, Texas
Avg Annual Temp
64.8°F
Annual Precip
38.0"
Annual Snowfall
0.5"
Extreme Heat Days
101.3
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Johnson County Weather
A mild, humid North Texas climate
Johnson County's 64.8°F annual average is roughly 10 degrees warmer than the national median. The area experiences a mix of humid summers and relatively mild winters compared to the rest of the country.
Matching the Texas state average
The county's average temperature of 64.8°F is nearly identical to the Texas state average of 65.5°F. Its 38.0 inches of annual precipitation is higher than the state average of 31.9 inches.
Slightly drier than eastern neighbors
Johnson County is slightly cooler than Kaufman County and receives about 3 inches less rain annually. It remains significantly wetter than Jones County to the west, which averages only 25.1 inches.
Hot summers with occasional winter ice
Summer temperatures average 82.3°F, contributing to 101 days of extreme heat over 90°F. Winter is crisp but mild at 47.0°F, with an average of 0.5 inches of snowfall.
Manage moisture and peak heat
With 38 inches of rain, drainage and foundation care are important for local homeowners. Prepare for roughly 100 days of extreme heat by servicing cooling systems every spring.
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.