Castle Shannon, PA has a humid continental climate. The summers are generally warm and humid, with occasional heat waves and average daytime temperatures in the mid-80s Fahrenheit (29-32 Celsius). Winters are cold but sunny and snowfall is moderate compared to other parts of Pennsylvania. Spring brings mild weather with rain showers, while autumn is generally cool and dry. Overall, Castle Shannon enjoys four distinct seasons, each providing its own unique beauty.
Castle Shannon, Pennsylvania gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Castle Shannon averages 30 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 163 sunny days per year in Castle Shannon. The US average is 205 sunny days.
Castle Shannon gets some kind of precipitation, on average, 144 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 83 degrees
Winter Low: the January low is 21
Rain: averages 39 inches of rain a year
Snow: averages 30 inches of snow a year