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September Weather in Herisson, France

Last updated: August 23, 2025

In September, the average temperature in Herisson, France hovers around 17°C (63°F), making it a pleasant month for outdoor activities. However, be prepared for a temperature range that can dip to a chilly 4°C (39°F) and soar up to a warm 35°C (96°F). Expect 65 mm (2.5 in) of precipitation spread over 7 days, contributing to an average humidity level of 78%. Pack accordingly for a mix of warm sun and refreshing showers!

September Temperature in Herisson

In September in Herisson, the average temperature is 17°C (63°F). Maximum can reach 35°C (96°F) and minimum can be as low as 4°C (39°F). Be prepared for warm days and cool nights while exploring Herisson during this time.

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

The chart illustrates September temperature patterns in Herisson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Herisson, September typically has an average temperature of 17°C (63°F), with highs reaching up to 35°C (96°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec394447525867706963554643
Data source: Temperature data for Herisson 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 Herisson

In Herisson in September, the precipitation amount is 65 mm (2.5 in) over a span of 7 days.

September Precipitation Trends in Herisson

The chart displays monthly precipitation patterns in Herisson, 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 Herisson, September typically receives around 65 mm (2.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec6456684692825741656869106
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Herisson

In Herisson in September, humidity is 78%. With an average temperature of 17°C (63°F), this humidity feels like a warm, enveloping blanket, making traveling slightly uncomfortable as you navigate the sticky air, prompting the need for frequent breaks in cooler, shaded areas.

September Average Humidity in Herisson

This chart illustrates the average monthly humidity levels in Herisson, 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 Herisson is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%84%82%82%79%72%78%88%91%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Herisson

In Herisson in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Herisson, you can refer to this Hourly UV Index in Herisson.

Maximum UV Index Levels in Herisson for September

The chart shows the monthly maximum UV Index (UVI) for Herisson 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 Herisson typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986532
Data source: Herisson 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 Herisson Compares to Other Months

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

This table compares monthly weather conditions in Herisson, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)64 mm (2.5 inches)91%low
February Weather6°C (44°F)56 mm (2.2 inches)89%moderate
March Weather8°C (47°F)68 mm (2.7 inches)86%moderate
April Weather11°C (53°F)46 mm (1.8 inches)84%high
May Weather15°C (59°F)91 mm (3.6 inches)82%very high
June Weather19°C (67°F)82 mm (3.2 inches)82%very high
July Weather21°C (70°F)57 mm (2.2 inches)79%very high
August Weather21°C (70°F)41 mm (1.6 inches)72%very high
September Weather17°C (63°F)65 mm (2.5 inches)78%high
October Weather13°C (55°F)68 mm (2.7 inches)88%moderate
November Weather8°C (46°F)69 mm (2.7 inches)91%moderate
December Weather6°C (43°F)106 mm (4.2 inches)93%low

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