In 1815, Bethlehem, Pennsylvania had a temperate climate. The summers were generally mild with temperatures ranging between 60 and 80 degrees Fahrenheit. Winters were cold but rarely extreme, usually dropping to around 20 degrees Fahrenheit. Precipitation was typical for the region with rain and snow both occurring in various amounts throughout the year. Despite these temperatures, Bethlehem experienced high humidity levels during the summer months which often made it feel hotter than what the thermometer actually read.
Bethlehem (zip 18015), Pennsylvania gets 49 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Bethlehem (zip 18015) averages 34 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 204 sunny days per year in Bethlehem (zip 18015). The US average is 205 sunny days.
Bethlehem (zip 18015) gets some kind of precipitation, on average, 113 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 84 degrees
Winter Low: the January low is 19
Rain: averages 49 inches of rain a year
Snow: averages 34 inches of snow a year