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September Weather in Norfolk, United States

Last updated: June 24, 2025

In September, the average temperature in Norfolk, United States is a comfortable 20°C (68°F). However, temperatures can fluctuate, with a minimum of 4°C (39°F) and a maximum reaching up to 35°C (95°F). Expect approximately 70 mm (2.8 in) of precipitation spread over 7 days, and prepare for a relatively high average humidity of 77%.

September Temperature in Norfolk

In September in Norfolk, the average temperature is 20°C (68°F). Maximums can reach 35°C (95°F) and minimums can be as low as 4°C (39°F). This weather makes Norfolk an ideal destination for travelers looking to enjoy mild days and cooler evenings.

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 20°C (68°F), with highs reaching up to 35°C (95°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec232338476074767367503829
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 70 mm (2.8 in) over a span of 7 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 70 mm (2.8 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec27248666150101758470852444
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 77%. With an average temperature of 20°C (68°F), this humidity feels like a warm, sticky embrace, making it essential for travelers to stay hydrated and take breaks in shaded areas to avoid feeling sluggish in the heat.

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 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%81%69%71%80%83%84%84%77%72%80%79%
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.
JanFebMarAprMayJunJulAugSepOctNovDec356891010108642
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-5°C (24°F)26 mm (1.0 inches)73%moderate
February Weather-5°C (24°F)24 mm (1.0 inches)81%moderate
March Weather4°C (39°F)86 mm (3.4 inches)69%high
April Weather8°C (47°F)66 mm (2.6 inches)71%very high
May Weather16°C (60°F)150 mm (5.9 inches)80%very high
June Weather23°C (74°F)100 mm (4.0 inches)83%very high
July Weather25°C (77°F)75 mm (2.9 inches)84%very high
August Weather23°C (73°F)84 mm (3.3 inches)84%very high
September Weather20°C (68°F)70 mm (2.8 inches)77%very high
October Weather10°C (50°F)85 mm (3.3 inches)72%high
November Weather3°C (38°F)24 mm (1.0 inches)80%moderate
December Weather-2°C (29°F)44 mm (1.7 inches)79%low

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