January Weather in Modesto, United States

Last updated: June 24, 2025

The average temperature in Modesto, United States during January is 10°C (50°F), with a minimum of -1°C (31°F) and a maximum of 24°C (75°F). Expect about 99 mm (3.9 in) of precipitation spread over 8 days, accompanied by a high average humidity of 82%.

January Temperature in Modesto

In January in Modesto, the average temperature is 10°C (50°F). Maximums can reach 24°C (75°F), while minimums can drop to as low as -1°C (31°F). This weather makes Modesto a perfect destination for travelers seeking a diverse climate experience, so be sure to pack layers for your trip!

January Weather in Modesto: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Modesto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Modesto, January typically has an average temperature of 10°C (50°F), with highs reaching up to 24°C (75°F) and lows dropping to around -1°C (31°F).

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

January Precipitation in Modesto

In Modesto in January, the precipitation amount is 99 mm (3.9 in) spread over 8 days.

January Precipitation Trends in Modesto

The chart displays monthly precipitation patterns in Modesto, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Modesto, January typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 8 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Modesto

In Modesto in January, humidity is 82%. With an average temperature of 10°C (50°F), this humidity feels like a dense, heavy blanket wrapping around you, making every step feel sluggish and the air thick, which can make traveling quite uncomfortable.

January Average Humidity in Modesto

This chart illustrates the average monthly humidity levels in Modesto, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Modesto is approximately 82%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Modesto

In Modesto in January, 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 Modesto, you can check the information here.

Maximum UV Index Levels in Modesto for January

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

Data source: Modesto January 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 January Weather in Modesto Compares to Other Months

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

This table compares monthly weather conditions in Modesto, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	99 mm (3.9 inches)	82%	moderate
February Weather	11°C (52°F)	78 mm (3.1 inches)	84%	moderate
March Weather	13°C (57°F)	87 mm (3.4 inches)	82%	very high
April Weather	17°C (63°F)	37 mm (1.5 inches)	78%	very high
May Weather	21°C (70°F)	21 mm (0.8 inches)	71%	very high
June Weather	25°C (77°F)	2 mm (0.1 inches)	64%	extreme
July Weather	26°C (80°F)	0 mm (0.0 inches)	58%	extreme
August Weather	26°C (78°F)	0 mm (0.0 inches)	54%	very high
September Weather	23°C (74°F)	2 mm (0.1 inches)	55%	very high
October Weather	18°C (65°F)	21 mm (0.8 inches)	62%	high
November Weather	13°C (56°F)	41 mm (1.6 inches)	78%	moderate
December Weather	10°C (50°F)	90 mm (3.5 inches)	80%	moderate