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August Weather in Rosny-sous-Bois, France

Last updated: August 23, 2025

In August, the average temperature in Rosny-sous-Bois, France is a pleasant 20°C (68°F). While you can enjoy warm days, be prepared for a minimum of 7°C (44°F) and the occasional spike to a toasty 38°C (100°F). Expect 58 mm (2.3 in) of precipitation spread across 9 days and a comfortable average humidity of 68%.

August Temperature in Rosny-sous-Bois

In August in Rosny-sous-Bois, the average temperature is 20°C (68°F). Maximums can reach 38°C (100°F), and minimums can be as low as 7°C (44°F). This range makes Rosny-sous-Bois an ideal destination for travelers seeking a mix of warm days and cooler evenings.

August Weather in Rosny-sous-Bois: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Rosny-sous-Bois, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rosny-sous-Bois, August typically has an average temperature of 20°C (68°F), with highs reaching up to 38°C (100°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec404347525866696862554643
Data source: Temperature data for Rosny-sous-Bois 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.

August Precipitation in Rosny-sous-Bois

In Rosny-sous-Bois in August, the precipitation amount is 58 mm (2.3 in) spread over 9 days.

August Precipitation Trends in Rosny-sous-Bois

The chart displays monthly precipitation patterns in Rosny-sous-Bois, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Rosny-sous-Bois, August typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec6069733172685258518166106
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Rosny-sous-Bois

In Rosny-sous-Bois in August humidity is 68%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making it ideal for leisurely strolls while also prompting travelers to stay hydrated and seek out refreshing breaks from the heat.

August Average Humidity in Rosny-sous-Bois

This chart illustrates the average monthly humidity levels in Rosny-sous-Bois, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Rosny-sous-Bois is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%85%84%82%80%73%68%76%88%92%93%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Rosny-sous-Bois

In Rosny-sous-Bois in August, 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 Rosny-sous-Bois.

Maximum UV Index Levels in Rosny-sous-Bois for August

The chart shows the monthly maximum UV Index (UVI) for Rosny-sous-Bois in August, 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 August, the maximum UV index in Rosny-sous-Bois typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689886421
Data source: Rosny-sous-Bois August 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 August Weather in Rosny-sous-Bois Compares to Other Months

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

This table compares monthly weather conditions in Rosny-sous-Bois, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)60 mm (2.3 inches)91%low
February Weather6°C (43°F)68 mm (2.7 inches)89%moderate
March Weather8°C (47°F)73 mm (2.9 inches)85%moderate
April Weather11°C (52°F)31 mm (1.2 inches)84%high
May Weather14°C (58°F)72 mm (2.8 inches)82%very high
June Weather19°C (66°F)68 mm (2.7 inches)80%very high
July Weather21°C (70°F)52 mm (2.0 inches)73%very high
August Weather20°C (68°F)58 mm (2.3 inches)68%very high
September Weather17°C (63°F)51 mm (2.0 inches)76%high
October Weather13°C (55°F)81 mm (3.2 inches)88%moderate
November Weather8°C (46°F)66 mm (2.6 inches)92%low
December Weather6°C (43°F)106 mm (4.2 inches)93%low

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