Average Weather in October in Bethlehem?Pennsylvania, United States

Daily high temperatures?decrease?by?11?F, from?69?F?to?58?F, rarely falling below?47?F?or exceeding?79?F.

Daily low temperatures?decrease?by?10?F, from?50?F?to?41?F, rarely falling below?31?F?or exceeding?61?F.

For reference, on?July 20, the?hottest day?of the year, temperatures in Bethlehem typically range from?67?F?to?85?F, while on?January 30, the?coldest day?of the year, they range from?23?F?to?37?F.

Temperature

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be?muggy?in Bethlehem is?decreasing?during October,?falling?from?7%?to?0%?over the course of the month.

For reference, on?July 28, the?muggiest day?of the year, there are muggy conditions?55%?of the time, while on?December 14, the?least muggy day?of the year, there are muggy conditions?0%?of the time.

Note that these figures were obtained from? Weather Spark.
If you would like more details be sure to visit their site: https://weatherspark.com/m/22869/10/Average-Weather-in-October-in-Bethlehem-Pennsylvania-United-States#Sections-Humidity