September Weather in Jacksonville

Last updated: March 2, 2024

The weather in Jacksonville, United States, during September is characterized by an average temperature of 26°C (80°F). Highs can soar to 34°C (94°F), while lows may dip to 19°C (66°F). Typically, the humidity level in Jacksonville throughout September hovers around 83%.

19°C (66°F)

Minimum temperature

26°C (80°F)

Average temperature

34°C (94°F)

Maximum temperature

83%

Humidity

Precipitation and Sunshine hours

In September, Jacksonville averages 137 mm (5.4 inches) of rainfall, typically over the course of 16 rainy days. The month enjoys an average of 12 hours 18 minutes of daylight, with the sun shining for approximately 9 hours 53 minutes each day. Additionally, there is a 35% probability of sunny days during this period.

137 mm (5.4 inches)

Precipitation

16 rainy days

Rainy days

9 hours 53 minutes

Sunshine hours

35%

Chance of sun

UV Index

In September, the UV Index in Jacksonville 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 10 8 6 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

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