nomadseason

May Weather in Guyancourt, France

Last updated: August 23, 2025

In May, the average temperature in Guyancourt, France hovers around 14°C (58°F). Expect chilly nights with a minimum of 0°C (33°F), while daytime highs can reach up to 29°C (85°F). This month brings an average precipitation of 80 mm (3.2 in) spread over 14 days, contributing to a notable average humidity of 82%.

May Temperature in Guyancourt

In May in Guyancourt, the average temperature is 14°C (58°F), with maximums reaching 29°C (85°F) and minimums dropping as low as 0°C (33°F). This means you'll want to pack layers to accommodate a range of temperatures during your travels.

May Weather in Guyancourt: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Guyancourt, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Guyancourt, May typically has an average temperature of 14°C (58°F), with highs reaching up to 29°C (85°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec404346525765686761544643
Data source: Temperature data for Guyancourt generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Guyancourt

In Guyancourt in May, the precipitation amount is 80 mm (3.2 in) over the course of 14 days.

May Precipitation Trends in Guyancourt

The chart displays monthly precipitation patterns in Guyancourt, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Guyancourt, May typically receives around 80 mm (3.2 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec5666763781805062507965101
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Guyancourt

In Guyancourt in May, humidity is 82%. With an average temperature of 14°C (58°F), this humidity feels like a heavy blanket wrapping around you, making travel uncomfortable and sticky.

May Average Humidity in Guyancourt

This chart illustrates the average monthly humidity levels in Guyancourt, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Guyancourt is approximately 82%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Guyancourt

In Guyancourt in May, 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 Guyancourt.

Maximum UV Index Levels in Guyancourt for May

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

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

This table compares monthly weather conditions in Guyancourt, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)56 mm (2.2 inches)91%low
February Weather6°C (43°F)66 mm (2.6 inches)89%moderate
March Weather8°C (47°F)76 mm (3.0 inches)85%moderate
April Weather11°C (52°F)37 mm (1.5 inches)84%high
May Weather14°C (58°F)80 mm (3.2 inches)82%very high
June Weather18°C (65°F)80 mm (3.2 inches)80%very high
July Weather20°C (69°F)50 mm (2.0 inches)73%very high
August Weather20°C (67°F)62 mm (2.4 inches)68%very high
September Weather16°C (62°F)50 mm (2.0 inches)76%high
October Weather12°C (55°F)79 mm (3.1 inches)88%moderate
November Weather8°C (46°F)65 mm (2.5 inches)92%low
December Weather6°C (43°F)101 mm (4.0 inches)93%low

Compare Guyancourt's Climate with Cities Worldwide