December Weather in Gridley, United States

Last updated: June 24, 2025

In December, the average temperature in Gridley, United States hovers around 10°C (50°F). However, expect a wide range, with minimums dipping to -3°C (28°F) and maximums soaring up to 25°C (77°F). The region experiences approximately 99 mm (3.9 in) of precipitation over 9 days, contributing to a relatively high average humidity of 83%.

December Temperature in Gridley

In December in Gridley, the average temperature is 10°C (50°F). Maximum temperatures can reach 25°C (77°F), while minimums can dip as low as -3°C (28°F). It's essential to pack layers to stay comfortable during your travels, as the weather can vary significantly throughout the day.

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

The chart illustrates December temperature patterns in Gridley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gridley, December typically has an average temperature of 10°C (50°F), with highs reaching up to 25°C (77°F) and lows dropping to around -3°C (28°F).

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

December Precipitation in Gridley

In Gridley in December, the precipitation amount is 99 mm (3.9 in) during a span of 9 days.

December Precipitation Trends in Gridley

The chart displays monthly precipitation patterns in Gridley, 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 Gridley, December typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 9 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 Gridley

In Gridley in December, humidity is 83%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration less comfortable and prompting visitors to seek cozy indoor activities.

December Average Humidity in Gridley

This chart illustrates the average monthly humidity levels in Gridley, 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 Gridley is approximately 83%, 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 Gridley

In Gridley 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 Gridley, you can check the information here.

Maximum UV Index Levels in Gridley for December

The chart shows the monthly maximum UV Index (UVI) for Gridley 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 Gridley typically reaches 3, which falls under the moderate exposure category.

Data source: Gridley 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 Gridley Compares to Other Months

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

This table compares monthly weather conditions in Gridley, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	124 mm (4.9 inches)	84%	moderate
February Weather	12°C (53°F)	121 mm (4.8 inches)	84%	moderate
March Weather	14°C (57°F)	107 mm (4.2 inches)	83%	high
April Weather	18°C (64°F)	50 mm (2.0 inches)	81%	very high
May Weather	22°C (72°F)	29 mm (1.2 inches)	74%	very high
June Weather	27°C (81°F)	5 mm (0.2 inches)	64%	extreme
July Weather	29°C (85°F)	1 mm (0.0 inches)	44%	very high
August Weather	28°C (83°F)	0 mm (0.0 inches)	36%	very high
September Weather	25°C (77°F)	3 mm (0.1 inches)	44%	very high
October Weather	19°C (67°F)	35 mm (1.4 inches)	65%	high
November Weather	13°C (56°F)	58 mm (2.3 inches)	84%	moderate
December Weather	10°C (50°F)	99 mm (3.9 inches)	83%	moderate