September Weather in Williamsburg

Last updated: March 2, 2024

The weather in Williamsburg, United States, during September is characterized by an average temperature of 27°C (81°F). Highs can soar to 34°C (93°F), while lows may dip to 21°C (70°F). Typically, the humidity level in Williamsburg throughout September hovers around 83%.

21°C (70°F)

Minimum temperature

27°C (81°F)

Average temperature

34°C (93°F)

Maximum temperature

83%

Humidity

Precipitation and Sunshine hours

In September, Williamsburg averages 184 mm (7.3 inches) of rainfall, typically over the course of 20 rainy days. The month enjoys an average of 12 hours 17 minutes of daylight, with the sun shining for approximately 10 hours 3 minutes each day. Additionally, there is a 30% probability of sunny days during this period.

184 mm (7.3 inches)

Precipitation

20 rainy days

Rainy days

10 hours 3 minutes

Sunshine hours

30%

Chance of sun

UV Index

In September, the UV Index in Williamsburg reaches a maximum of 11, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 10 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 7 10 11 10 9 6 3 1 1
Exposure Low Moderate High VeryHigh Extreme VeryHigh High Moderate Low
Time to burn 45 min 30 min 25 min 15 min 10 min 15 min 25 min 30 min 45 min

Compare Williamsburg's Climate with Cities Worldwide