Johnston County, NC has a humid subtropical climate with hot summers and mild winters. The average high temperature in the summer months is usually in the mid-80s while the average low temperature in the winter months normally ranges from the mid 30s to low 40s. Precipitation in Johnston County averages 50 inches annually, mainly concentrated in rain during the summer months. Snowfall is relatively rare, typically occurring only one or two days per year. Humidity levels tend to be highest during late spring and early summer when temperatures also reach their peak for the year.
Johnston County, North Carolina gets 47 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Johnston County averages 2 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 217 sunny days per year in Johnston County. The US average is 205 sunny days.
Johnston County gets some kind of precipitation, on average, 107 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 89 degrees
Winter Low: the January low is 30
Rain: averages 47 inches of rain a year
Snow: averages 2 inches of snow a year