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September Weather in Montrejeau, France

Last updated: August 23, 2025

In September, the average temperature in Montrejeau, France hovers around 15°C (59°F), with minimums reaching as low as 3°C (38°F) and maximums soaring to 29°C (84°F). Visitors should be prepared for 111 mm (4.4 in) of precipitation spread over 17 days, contributing to an average humidity of 73%. Be ready for a mix of comfortable warmth and occasional rain!

September Temperature in Montrejeau

In September in Montrejeau, the average temperature is 15°C (59°F). The maximum can reach 29°C (84°F), while the minimum can drop as low as 3°C (38°F). This makes it a great time to explore Montrejeau, as you can enjoy mild weather with a mix of pleasant warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Montrejeau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Montrejeau, September typically has an average temperature of 15°C (59°F), with highs reaching up to 29°C (84°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec364143485461646459524239
Data source: Temperature data for Montrejeau 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 Montrejeau

In Montrejeau in September, the precipitation amount is 111 mm (4.4 in) spread over 17 days.

September Precipitation Trends in Montrejeau

The chart displays monthly precipitation patterns in Montrejeau, 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 Montrejeau, September typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec8879107136153187150123111101105141
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Montrejeau

In Montrejeau in September humidity is 73%. With an average temperature of 15°C (59°F), this humidity feels like a mild discomfort, making sightseeing a bit sticky and requiring travelers to stay hydrated and take breaks in the shade.

September Average Humidity in Montrejeau

This chart illustrates the average monthly humidity levels in Montrejeau, 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 Montrejeau is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%83%80%77%75%74%72%70%73%82%87%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Montrejeau

In Montrejeau in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Montrejeau.

Maximum UV Index Levels in Montrejeau for September

The chart shows the monthly maximum UV Index (UVI) for Montrejeau 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 Montrejeau typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24679101097532
Data source: Montrejeau 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 Montrejeau Compares to Other Months

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

This table compares monthly weather conditions in Montrejeau, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (37°F)88 mm (3.5 inches)87%low
February Weather5°C (41°F)79 mm (3.1 inches)83%moderate
March Weather6°C (43°F)107 mm (4.2 inches)80%high
April Weather9°C (48°F)136 mm (5.3 inches)77%high
May Weather12°C (54°F)153 mm (6.0 inches)75%very high
June Weather16°C (61°F)187 mm (7.3 inches)74%very high
July Weather18°C (65°F)150 mm (5.9 inches)72%very high
August Weather18°C (64°F)123 mm (4.8 inches)70%very high
September Weather15°C (59°F)111 mm (4.4 inches)73%high
October Weather11°C (52°F)101 mm (4.0 inches)82%moderate
November Weather6°C (43°F)105 mm (4.1 inches)87%moderate
December Weather4°C (40°F)141 mm (5.5 inches)88%low

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