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September Weather in Modane, France

Last updated: August 23, 2025

In Modane, France, the average temperature in September hovers around 8°C (46°F). While you might experience chilly nights with a minimum of -10°C (14°F), daytime can pleasantly warm up to a maximum of 20°C (68°F). Expect about 48 mm (1.9 in) of rainfall spread over 10 days, contributing to a comfortable average humidity of 73%.

September Temperature in Modane

In September, in Modane, the average temperature is 8°C (46°F). The maximum can reach 20°C (68°F), and the minimum can be as low as -10°C (14°F). This makes it essential for travelers to pack layers to stay comfortable in varying conditions.

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

The chart illustrates September temperature patterns in Modane, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Modane, September typically has an average temperature of 8°C (46°F), with highs reaching up to 20°C (68°F) and lows dropping to around -10°C (14°F).
JanFebMarAprMayJunJulAugSepOctNovDec152124303848535346382518
Data source: Temperature data for Modane 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 Modane

In Modane in September, the precipitation amount is 48 mm (1.9 in) spread over a period of 10 days.

September Precipitation Trends in Modane

The chart displays monthly precipitation patterns in Modane, 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 Modane, September typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec112791147914191616748101115178
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Modane

In Modane in September humidity is 73%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that wraps around you, making outdoor activities less comfortable for traveling and often leaving you yearning for a warm shelter to escape the cool, moist air.

September Average Humidity in Modane

This chart illustrates the average monthly humidity levels in Modane, 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 Modane is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%87%84%83%78%75%72%63%73%89%91%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Modane

In Modane 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 Modane.

Maximum UV Index Levels in Modane for September

The chart shows the monthly maximum UV Index (UVI) for Modane 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 Modane typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111108642
Data source: Modane 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 Modane Compares to Other Months

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

This table compares monthly weather conditions in Modane, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)112 mm (4.4 inches)91%moderate
February Weather-6°C (21°F)79 mm (3.1 inches)87%moderate
March Weather-4°C (24°F)114 mm (4.5 inches)84%very high
April Weather-1°C (31°F)79 mm (3.1 inches)83%very high
May Weather3°C (38°F)141 mm (5.5 inches)78%very high
June Weather9°C (49°F)91 mm (3.6 inches)75%extreme
July Weather12°C (54°F)61 mm (2.4 inches)72%extreme
August Weather12°C (53°F)67 mm (2.6 inches)63%very high
September Weather8°C (46°F)48 mm (1.9 inches)73%very high
October Weather3°C (38°F)101 mm (4.0 inches)89%high
November Weather-4°C (25°F)115 mm (4.5 inches)90%moderate
December Weather-8°C (18°F)178 mm (7.0 inches)90%low

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