Johnston County Climate
Johnston County, North Carolina
Avg Annual Temp
60.8°F
Annual Precip
50.8"
Annual Snowfall
2.0"
Extreme Heat Days
46.85
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Johnston County Weather
A warm inland subtropical environment
Johnston County's 60.8°F annual average is well above the national median. This climate supports long growing seasons and very warm, humid summers.
Topping the state average for heat
The county is warmer than the 59.3°F state average by over a degree. It closely mirrors the state average for precipitation, receiving 50.8 inches annually.
Typical central North Carolina weather
Johnston's 2.0 inches of annual snowfall is slightly lower than some neighbors to the west. It maintains a consistent rainfall profile that supports the region's diverse agriculture.
Intense summer heat dominates the year
Residents face 47 extreme heat days annually, with July temperatures averaging a hot 80.1°F. Winters are mild, with the temperature rarely staying below freezing for long.
Stay hydrated and manage cooling costs
Budget for significant air conditioning use during the 47 days of 90-degree weather. Since snow is rare at only 2 inches, focus your emergency prep on summer storms and heat safety.
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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.