Johnson County Climate
Johnson County, Texas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
64.8°F
Annual Precip
38.0"
Annual Snowfall
0.5"
Extreme Heat Days
101
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
6,093
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Johnson County
Climate Verdict
Johnson County has a warm, averaging 64.8°F year-round, moderate rainfall of 38.0 inches per year, significant summer heat with 101.30000000000001 days annually above 90°F, light snow averaging 0.5 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 45.2°F. summers are hot, with July averaging 83.5°F. The 38°F seasonal variation provides noticeable but manageable change. January is typically the coldest month and August the warmest.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Johnson County closely matches the Texas statewide average temperature of 65.5°F, it is also noticeably wetter, receiving 6.1 inches more precipitation than the state average.
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
What is the average temperature in Johnson County?
How much rain does Johnson County get?
Does it snow in Johnson County?
How hot does Johnson County get in summer?
How cold are winters in Johnson County?
Track your own weather in Johnson County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.