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December Weather in Geneva, United States

Last updated: June 24, 2025

In December, the average temperature in Geneva, United States hovers around 1°C (33°F). While temperatures can dip as low as -21°C (-5°F), they can also reach a pleasant 21°C (71°F) on warmer days. Expect 39 mm (1.5 in) of precipitation over about 4 days, and prepare for an average humidity level of 79%, creating a brisk yet refreshing atmosphere.

December Temperature in Geneva

In December in Geneva, the average temperature is 1°C (33°F). Maximum temperatures can reach up to 21°C (71°F), while the minimum can dip as low as -21°C (-5°F). Be prepared for a wide temperature range if you're traveling during this time!

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

The chart illustrates December temperature patterns in Geneva, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Geneva, December typically has an average temperature of 1°C (33°F), with highs reaching up to 21°C (71°F) and lows dropping to around -21°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec272742516376797570534133
Data source: Temperature data for Geneva 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 Geneva

In Geneva in December, the precipitation amount is 39 mm (1.5 in) spread over a period of 4 days.

December Precipitation Trends in Geneva

The chart displays monthly precipitation patterns in Geneva, 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 Geneva, December typically receives around 39 mm (1.5 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec3024924616296538170952439
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Geneva

In Geneva in December, humidity is 79%. With an average temperature of 1°C (33°F), this humidity feels like an icy blanket enveloping you, making travel quite uncomfortable as the cold dampness seeps into your clothes and chills you to the bone.

December Average Humidity in Geneva

This chart illustrates the average monthly humidity levels in Geneva, 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 Geneva is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%81%69%71%80%83%84%84%77%72%80%79%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Geneva

In Geneva in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Geneva, you can check the information here.

Maximum UV Index Levels in Geneva for December

The chart shows the monthly maximum UV Index (UVI) for Geneva 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 Geneva typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111108643
Data source: Geneva 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 Geneva Compares to Other Months

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

This table compares monthly weather conditions in Geneva, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (28°F)30 mm (1.2 inches)73%moderate
February Weather-3°C (27°F)24 mm (0.9 inches)81%moderate
March Weather6°C (42°F)92 mm (3.6 inches)69%high
April Weather11°C (51°F)46 mm (1.8 inches)71%very high
May Weather17°C (63°F)162 mm (6.4 inches)80%very high
June Weather25°C (76°F)96 mm (3.8 inches)83%extreme
July Weather26°C (79°F)53 mm (2.1 inches)84%extreme
August Weather24°C (75°F)80 mm (3.2 inches)84%very high
September Weather21°C (71°F)70 mm (2.7 inches)77%very high
October Weather12°C (53°F)95 mm (3.8 inches)72%high
November Weather5°C (42°F)24 mm (1.0 inches)80%moderate
December Weather1°C (33°F)39 mm (1.5 inches)79%moderate

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