December Weather in Geneva, United States

Last updated: June 24, 2025

In December, the average temperature in Geneva, United States hovers around 18°C (64°F), with a minimum drop to 2°C (36°F) and highs reaching up to 30°C (87°F). Expect a total precipitation of 69 mm (2.7 in) spread over 7 days, while the average humidity sits at a comfortable 84%.

December Temperature in Geneva

In December in Geneva, the average temperature is 18°C (64°F), with maximums reaching 30°C (87°F) and minimums dropping as low as 2°C (36°F). This climate makes Geneva a great destination for travelers seeking a mix of comfortable warmth and cool evenings.

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 18°C (64°F), with highs reaching up to 30°C (87°F) and lows dropping to around 2°C (36°F).

Data source: Temperature data for Geneva generated using information from the Copernicus Climate Change Service.

December Precipitation in Geneva

In Geneva in December, the precipitation amount is 69 mm (2.7 in) over the course of 7 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 69 mm (2.7 inches) of precipitation spread over approximately 7 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Geneva

In Geneva in December humidity is 84%. With an average temperature of 18°C (64°F), this humidity feels like there's a heavy blanket wrapping around you, making travel feel a bit sticky and muggy, potentially leading to fatigue if you're not prepared.

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 84%, offering insight into how humid the weather typically is during this month.

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 reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Geneva.

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 5, which falls under the moderate exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (62°F)	35 mm (1.4 inches)	83%	moderate
February Weather	19°C (67°F)	53 mm (2.1 inches)	80%	very high
March Weather	20°C (68°F)	25 mm (1.0 inches)	75%	very high
April Weather	22°C (73°F)	76 mm (3.0 inches)	70%	extreme
May Weather	25°C (77°F)	124 mm (4.9 inches)	68%	extreme
June Weather	27°C (81°F)	231 mm (9.1 inches)	75%	extreme
July Weather	28°C (82°F)	244 mm (9.6 inches)	79%	extreme
August Weather	28°C (82°F)	268 mm (10.5 inches)	81%	extreme
September Weather	27°C (81°F)	191 mm (7.5 inches)	83%	extreme
October Weather	25°C (78°F)	95 mm (3.7 inches)	81%	very high
November Weather	21°C (69°F)	55 mm (2.2 inches)	82%	high
December Weather	18°C (64°F)	69 mm (2.7 inches)	84%	moderate