September Weather in Port Arthur

Last updated: March 2, 2024

The weather in Port Arthur, United States, during September is characterized by an average temperature of 27°C (80°F). Highs can soar to 34°C (93°F), while lows may dip to 18°C (65°F). Typically, the humidity level in Port Arthur throughout September hovers around 75%.

18°C (65°F)

Minimum temperature

27°C (80°F)

Average temperature

34°C (93°F)

Maximum temperature

75%

Humidity

Precipitation and Sunshine hours

In September, Port Arthur averages 202 mm (8.0 inches) of rainfall, typically over the course of 16 rainy days. The month enjoys an average of 12 hours 17 minutes of daylight, with the sun shining for approximately 9 hours 10 minutes each day. Additionally, there is a 49% probability of sunny days during this period.

202 mm (8.0 inches)

Precipitation

16 rainy days

Rainy days

9 hours 10 minutes

Sunshine hours

49%

Chance of sun

UV Index

In September, the UV Index in Port Arthur reaches a maximum of 10, 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 1 1 2 4 7 9 10 9 7 5 3 1 1
Exposure Low Moderate High VeryHigh High Moderate Low
Time to burn 45 min 30 min 25 min 15 min 25 min 30 min 45 min

Compare Port Arthur's Climate with Cities Worldwide