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September Weather in Concord, United States

Last updated: June 24, 2025

In September, the average temperature in Concord, United States is a pleasant 22°C (73°F). However, be prepared for a range—temperatures can dip to a minimum of 5°C (42°F) and soar to a maximum of 37°C (99°F). Expect 106 mm (4.2 in) of precipitation over approximately 9 days, and note that the average humidity sits at a comfortable 75%.

September Temperature in Concord

In September in Concord, the average temperature is 22°C (73°F). Maximums can reach 37°C (99°F), while minimums can drop as low as 5°C (42°F). Be prepared for warm days and cooler evenings, making it ideal for both outdoor adventures and relaxing nights.

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

The chart illustrates September temperature patterns in Concord, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Concord, September typically has an average temperature of 22°C (73°F), with highs reaching up to 37°C (99°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec394550596875807872634843
Data source: Temperature data for Concord 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 Concord

In Concord in September, the total precipitation amount is 106 mm (4.2 in), spread over the course of 9 days.

September Precipitation Trends in Concord

The chart displays monthly precipitation patterns in Concord, 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 Concord, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7210267117110106589510710473103
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Concord

In Concord in September humidity is 75%. With an average temperature of 22°C (73°F), this humidity feels like a warm, enveloping embrace, making it essential for travelers to stay hydrated and wear light, breathable clothing to enjoy their adventures comfortably.

September Average Humidity in Concord

This chart illustrates the average monthly humidity levels in Concord, 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 Concord is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%84%82%83%83%79%77%75%81%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Concord

In Concord 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 Concord.

Maximum UV Index Levels in Concord for September

The chart shows the monthly maximum UV Index (UVI) for Concord 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 Concord typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679101110109753
Data source: Concord 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 Concord Compares to Other Months

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

This table compares monthly weather conditions in Concord, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)72 mm (2.8 inches)84%moderate
February Weather7°C (45°F)102 mm (4.0 inches)84%high
March Weather10°C (50°F)67 mm (2.6 inches)84%high
April Weather15°C (59°F)117 mm (4.6 inches)82%very high
May Weather20°C (68°F)110 mm (4.3 inches)82%very high
June Weather24°C (75°F)106 mm (4.2 inches)83%extreme
July Weather27°C (81°F)58 mm (2.3 inches)79%very high
August Weather25°C (78°F)95 mm (3.7 inches)77%very high
September Weather22°C (73°F)106 mm (4.2 inches)75%very high
October Weather17°C (63°F)104 mm (4.1 inches)81%high
November Weather9°C (48°F)73 mm (2.9 inches)87%moderate
December Weather6°C (43°F)103 mm (4.1 inches)85%moderate

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