September Weather in Bethlehem

Last updated: March 2, 2024

The weather in Bethlehem, United States, during September is characterized by an average temperature of 23°C (75°F). Highs can soar to 33°C (91°F), while lows may dip to 13°C (56°F). Typically, the humidity level in Bethlehem throughout September hovers around 82%.

13°C (56°F)

Minimum temperature

23°C (75°F)

Average temperature

33°C (91°F)

Maximum temperature

82%

Humidity

Precipitation and Sunshine hours

In September, Bethlehem averages 116 mm (4.6 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 12 hours 20 minutes of daylight, with the sun shining for approximately 9 hours 36 minutes each day. Additionally, there is a 45% probability of sunny days during this period.

116 mm (4.6 inches)

Precipitation

10 rainy days

Rainy days

9 hours 36 minutes

Sunshine hours

45%

Chance of sun

UV Index

In September, the UV Index in Bethlehem reaches a maximum of 9, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00
UVI	0	1	2	4	6	8	9	9	8	5	3	2	1
Exposure	Low			Moderate	High	VeryHigh				Moderate		Low
Time to burn	45 min			30 min	25 min	15 min				30 min		45 min