Westmoreland County, Pennsylvania has an overall mild climate throughout the year with four distinct seasons. Summers are usually warm and humid, while winters tend to be cool and snowy. The average annual temperature is around 49°F (9°C). The summer months are typically the hottest with temperatures reaching into the low 80s (27-29°C) at their peak. Autumn brings cooler weather as temperatures gradually decrease until winter arrives in December. During the winter months, temperatures can range from cold lows in the teens (-7 to -10°C) up to the low 40s (4-6°C). Springtime brings warmer air back as temperatures gradually increase until summer again brings high humidity and temps. All in all, Westmoreland County offers a pleasant climate throughout the year.
Westmoreland County, Pennsylvania gets 43 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Westmoreland County averages 34 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 162 sunny days per year in Westmoreland County. The US average is 205 sunny days.
Westmoreland County gets some kind of precipitation, on average, 145 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 20
Rain: averages 43 inches of rain a year
Snow: averages 34 inches of snow a year