Bethlehem
Pennsylvania, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Bethlehem, PA

A tranquil setting of dry trees and neat fields behind this large hall in the Lehigh University in Bethlehem, Pennsylvania, under a scenic clear
A tranquil setting of dry trees and neat fields behind this large hall in the Lehigh University in Bethlehem, Pennsylvania, under a scenic clear
September, the first month of the autumn, in Bethlehem, is still a warm month, with temperature in the range of an average high of 75°F (23.9°C) and an average low of 53.1°F (11.7°C).

Temperature

In Bethlehem, the average high-temperature in September marginally drops, from 82°F (27.8°C) in August, to a still moderately hot 75°F (23.9°C). The average low-temperature, is 53.1°F (11.7°C).

Rainfall

In Bethlehem, 4.6" (117.3mm) of precipitation is typically accumulated. Throughout the year, 45.4" (1154.4mm) of rain is accumulated.

Daylight

In Bethlehem, the average length of the day in September is 12.4h.

What is the temperature in September in Bethlehem?

In September, the average high-temperature is 75°F (23.9°C), and the average low-temperature is 53.1°F (11.7°C).

How much does it rain in Bethlehem in September?

During September, Bethlehem regularly aggregates up to 4.6" (117.3mm) of precipitation.

What is the average length of the day in September in Bethlehem?

In September, the average length of the day in Bethlehem is 12.4h.
Average temperature in September - Bethlehem, PA
  • Average high temperature in September: 75°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in September: 53°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (19°F).

Average rainfall in September - Bethlehem, PA
  • Average rainfall in September: 4.6"

The wettest month (with the highest rainfall) is July (5").
The driest month (with the lowest rainfall) is February (2.8").

Average daylight in September - Bethlehem, PA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.3h).