Keystone, WV has a humid subtropical climate with mild winters and hot, humid summers. The average annual temperature is roughly 57°F (14°C), with an average high of 76°F (24°C) in July and an average low of 35°F (2°C) in January. Rainfall is fairly evenly distributed throughout the year, but summer months see slightly more rainfall than winter months. Snowfall can be expected from November to March, though it does not usually accumulate for long periods of time.
Keystone, West Virginia gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Keystone averages 30 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 155 sunny days per year in Keystone. The US average is 205 sunny days.
Keystone gets some kind of precipitation, on average, 146 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 82 degrees
Winter Low: the January low is 23
Rain: averages 39 inches of rain a year
Snow: averages 30 inches of snow a year