September Weather in Bay Saint Louis

Last updated: March 2, 2024

The weather in Bay Saint Louis, United States, during September is characterized by an average temperature of 27°C (80°F). Highs can soar to 31°C (88°F), while lows may dip to 21°C (71°F). Typically, the humidity level in Bay Saint Louis throughout September hovers around 80%.

21°C (71°F)

Minimum temperature

27°C (80°F)

Average temperature

31°C (88°F)

Maximum temperature

80%

Humidity

Precipitation and Sunshine hours

In September, Bay Saint Louis averages 155 mm (6.1 inches) of rainfall, typically over the course of 14 rainy days. The month enjoys an average of 12 hours 18 minutes of daylight, with the sun shining for approximately 9 hours 26 minutes each day. Additionally, there is a 45% probability of sunny days during this period.

155 mm (6.1 inches)

Precipitation

14 rainy days

Rainy days

9 hours 26 minutes

Sunshine hours

45%

Chance of sun

UV Index

In September, the UV Index in Bay Saint Louis reaches a maximum of 10, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, 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	1	1	3	5	8	10	10	9	7	4	2	1	1
Exposure	Low		Moderate		VeryHigh				High	Moderate	Low
Time to burn	45 min		30 min		15 min				25 min	30 min	45 min