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September Weather in Norfolk, United States

Last updated: June 24, 2025

In September, the average temperature in Norfolk, United States hovers around 18°C (64°F). Expect temperature fluctuations, with a minimum of 2°C (36°F) and a maximum reaching 32°C (90°F). During this time, precipitation amounts average 123 mm (4.9 in) over the course of 9 days, contributing to an average humidity of 68%. Prepare for a blend of warmth and moisture as you explore this charming destination!

September Temperature in Norfolk

In September in Norfolk, the average temperature is 18°C (64°F). Maximum temperatures can reach up to 32°C (90°F), while minimums can drop as low as 2°C (36°F). This varied climate makes Norfolk an ideal destination for travelers seeking both warm and cool experiences.

September Weather in Norfolk: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Norfolk, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Norfolk, September typically has an average temperature of 18°C (64°F), with highs reaching up to 32°C (90°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec273035465767727164544031
Data source: Temperature data for Norfolk generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Norfolk

In Norfolk in September, the precipitation amount is 123 mm (4.9 in) over a period of 9 days.

September Precipitation Trends in Norfolk

The chart displays monthly precipitation patterns in Norfolk, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Norfolk, September typically receives around 123 mm (4.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec79958913712399151117124150100117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Norfolk

In Norfolk in September, humidity is 68%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making for a slightly muggy experience that can leave you feeling sticky as you explore, so it’s best to stay hydrated and take frequent breaks in the shade.

September Average Humidity in Norfolk

This chart illustrates the average monthly humidity levels in Norfolk, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Norfolk is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Norfolk

In Norfolk in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Norfolk.

Maximum UV Index Levels in Norfolk for September

The chart shows the monthly maximum UV Index (UVI) for Norfolk in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Norfolk typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Norfolk September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Norfolk Compares to Other Months

Weather in Norfolk varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Norfolk, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Norfolk, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)79 mm (3.1 inches)84%moderate
February Weather-1°C (30°F)95 mm (3.8 inches)82%moderate
March Weather2°C (36°F)89 mm (3.5 inches)81%high
April Weather8°C (47°F)137 mm (5.4 inches)78%very high
May Weather14°C (58°F)123 mm (4.8 inches)69%very high
June Weather19°C (67°F)99 mm (3.9 inches)69%very high
July Weather22°C (73°F)151 mm (6.0 inches)62%very high
August Weather22°C (71°F)117 mm (4.6 inches)65%very high
September Weather18°C (64°F)123 mm (4.9 inches)68%very high
October Weather12°C (54°F)150 mm (5.9 inches)74%high
November Weather4°C (40°F)100 mm (3.9 inches)82%moderate
December Weather0°C (32°F)117 mm (4.6 inches)80%low

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