December Weather in Genoa, United States

Last updated: June 24, 2025

In December, the average temperature in Genoa, United States hovers around -1°C (30°F), with extremes ranging from a chilly -21°C (-6°F) to a mild 19°C (67°F). Expect about 41 mm (1.6 in) of precipitation over 4 days, contributing to an average humidity of 79%.

December Temperature in Genoa

In December in Genoa, the average temperature is -1°C (30°F), with maximums reaching 19°C (67°F) and minimums plummeting to -21°C (-6°F). Travelers should be prepared for a wide temperature range, packing both warm clothing for the cold and lighter layers for the occasional warmth.

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

The chart illustrates December temperature patterns in Genoa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Genoa, December typically has an average temperature of -1°C (30°F), with highs reaching up to 19°C (67°F) and lows dropping to around -21°C (-6°F).

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

December Precipitation in Genoa

In Genoa in December, the precipitation amount is 41 mm (1.6 in) over the course of 4 days.

December Precipitation Trends in Genoa

The chart displays monthly precipitation patterns in Genoa, 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 Genoa, December typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 4 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 Genoa

In Genoa in December, humidity is 79%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill in the air, making outdoor activities uncomfortable and requiring extra layers to stay warm while exploring.

December Average Humidity in Genoa

This chart illustrates the average monthly humidity levels in Genoa, 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 Genoa is approximately 79%, 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 Genoa

In Genoa 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 Genoa, you can visit Hourly UV Index in Genoa.

Maximum UV Index Levels in Genoa for December

The chart shows the monthly maximum UV Index (UVI) for Genoa 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 Genoa typically reaches 2, which falls under the low exposure category.

Data source: Genoa 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 Genoa Compares to Other Months

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

This table compares monthly weather conditions in Genoa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	27 mm (1.1 inches)	73%	moderate
February Weather	-4°C (25°F)	21 mm (0.8 inches)	81%	moderate
March Weather	4°C (40°F)	88 mm (3.5 inches)	69%	high
April Weather	9°C (49°F)	54 mm (2.1 inches)	71%	very high
May Weather	16°C (61°F)	143 mm (5.6 inches)	80%	very high
June Weather	24°C (75°F)	100 mm (3.9 inches)	83%	extreme
July Weather	25°C (78°F)	67 mm (2.6 inches)	84%	very high
August Weather	23°C (74°F)	94 mm (3.7 inches)	84%	very high
September Weather	20°C (69°F)	53 mm (2.1 inches)	77%	very high
October Weather	11°C (51°F)	83 mm (3.3 inches)	72%	high
November Weather	4°C (40°F)	24 mm (0.9 inches)	80%	moderate
December Weather	-1°C (30°F)	41 mm (1.6 inches)	79%	low