nomadseason

September Weather in Charles City, United States

Last updated: June 24, 2025

In September, the average temperature in Charles City, United States is a pleasant 23°C (74°F). However, be prepared for a range, as temperatures can dip to a cool 9°C (48°F) and soar to a warm 35°C (95°F). During this time, expect 108 mm (4.2 in) of precipitation spread across 11 days, all while enjoying an average humidity level of 78%.

September Temperature in Charles City

In September in Charles City, the average temperature is 23°C (74°F). Maximums can reach 35°C (95°F), and minimums can be as low as 9°C (48°F). This makes Charles City a great destination for travelers seeking a comfortable climate to explore outdoor activities and enjoy the local scenery.

September Weather in Charles City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Charles City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Charles City, September typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec414650606976817974645045
Data source: Temperature data for Charles City generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Charles City

In Charles City in September, the precipitation amount is 108 mm (4.2 in), distributed over 11 days.

September Precipitation Trends in Charles City

The chart displays monthly precipitation patterns in Charles City, 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 Charles City, September typically receives around 108 mm (4.2 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec82103861031071131191551081167888
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Charles City

In Charles City in September humidity is 78%. With an average temperature of 23°C (74°F), this humidity feels like a warm, enveloping embrace, making travel somewhat stifling and prompting frequent breaks to hydrate and seek shade.

September Average Humidity in Charles City

This chart illustrates the average monthly humidity levels in Charles City, 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 Charles City is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%82%81%80%82%81%81%78%80%84%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Charles City

In Charles City in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Charles City.

Maximum UV Index Levels in Charles City for September

The chart shows the monthly maximum UV Index (UVI) for Charles City 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 Charles City typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679101011109853
Data source: Charles City 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 Charles City Compares to Other Months

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

This table compares monthly weather conditions in Charles City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)82 mm (3.2 inches)84%moderate
February Weather8°C (46°F)103 mm (4.0 inches)83%high
March Weather10°C (51°F)86 mm (3.4 inches)82%high
April Weather16°C (60°F)103 mm (4.0 inches)81%very high
May Weather20°C (69°F)107 mm (4.2 inches)80%very high
June Weather24°C (76°F)113 mm (4.5 inches)82%very high
July Weather27°C (81°F)119 mm (4.7 inches)81%extreme
August Weather26°C (79°F)155 mm (6.1 inches)81%very high
September Weather23°C (74°F)108 mm (4.2 inches)78%very high
October Weather18°C (65°F)116 mm (4.6 inches)80%very high
November Weather10°C (51°F)78 mm (3.1 inches)84%moderate
December Weather7°C (45°F)88 mm (3.5 inches)84%moderate

Compare Charles City's Climate with Cities Worldwide