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December Weather in Guillestre, France

Last updated: August 23, 2025

In Guillestre, France, the average temperature in December hovers around -7°C (20°F), with extremes ranging from a chilly -23°C (-10°F) to a mild 3°C (38°F). Visitors can expect 122 mm (4.8 in) of precipitation spread over approximately 13 days, contributing to a notably high average humidity of 90%. Bundle up if you're planning to explore!

December Temperature in Guillestre

In December in Guillestre, the average temperature is -7°C (20°F). The maximum can reach 3°C (38°F), while the minimum can drop as low as -23°C (-10°F). Be prepared for cold weather and pack warm clothing if you're planning to travel during this time.

December Weather in Guillestre: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Guillestre, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Guillestre, December typically has an average temperature of -7°C (20°F), with highs reaching up to 3°C (38°F) and lows dropping to around -23°C (-10°F).
JanFebMarAprMayJunJulAugSepOctNovDec172326323950555548402719
Data source: Temperature data for Guillestre 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.

December Precipitation in Guillestre

In Guillestre in December, the precipitation amount is 122 mm (4.8 in) recorded over a span of 13 days.

December Precipitation Trends in Guillestre

The chart displays monthly precipitation patterns in Guillestre, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Guillestre, December typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec6557938513010061414495114122
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Guillestre

In Guillestre in December, humidity is 90%. With an average temperature of -7°C (20°F), this humidity feels like an oppressive chill that seeps into your bones, making travel uncomfortable and your breath visible in the frosty air.

December Average Humidity in Guillestre

This chart illustrates the average monthly humidity levels in Guillestre, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Guillestre is approximately 90%, 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 December generated using information from the Copernicus Climate Change Service.

December UV Index in Guillestre

In Guillestre in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Guillestre, you can visit Hourly UV Index in Guillestre.

Maximum UV Index Levels in Guillestre for December

The chart shows the monthly maximum UV Index (UVI) for Guillestre in December, 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 December, the maximum UV index in Guillestre typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110108632
Data source: Guillestre December 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 December Weather in Guillestre Compares to Other Months

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

This table compares monthly weather conditions in Guillestre, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)65 mm (2.6 inches)91%moderate
February Weather-5°C (23°F)57 mm (2.3 inches)87%moderate
March Weather-3°C (26°F)93 mm (3.7 inches)84%high
April Weather0°C (32°F)85 mm (3.3 inches)83%very high
May Weather4°C (40°F)130 mm (5.1 inches)78%very high
June Weather10°C (50°F)100 mm (3.9 inches)75%extreme
July Weather13°C (55°F)61 mm (2.4 inches)72%very high
August Weather13°C (56°F)41 mm (1.6 inches)63%very high
September Weather9°C (48°F)44 mm (1.7 inches)73%very high
October Weather4°C (40°F)95 mm (3.7 inches)89%high
November Weather-3°C (27°F)114 mm (4.5 inches)90%moderate
December Weather-7°C (20°F)122 mm (4.8 inches)90%low

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