January Weather in Downey, United States

Last updated: June 24, 2025

In Downey, United States, the average temperature in January hovers around -6°C (22°F). However, be prepared for chilly extremes, with minimums plunging to -24°C (-11°F) and maximums reaching a brisk 7°C (45°F). During this month, expect 59 mm (2.3 in) of precipitation spread over 11 days, coupled with an average humidity of an impressive 95%.

January Temperature in Downey

In January in Downey, the average temperature is -6°C (22°F). Maximums can reach 7°C (45°F), while minimums can drop as low as -24°C (-11°F). Visitors should be prepared for cold weather and dress in layers to enjoy outdoor activities comfortably.

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

The chart illustrates January temperature patterns in Downey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Downey, January typically has an average temperature of -6°C (22°F), with highs reaching up to 7°C (45°F) and lows dropping to around -24°C (-11°F).

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

January Precipitation in Downey

In Downey in January, the precipitation amount is 59 mm (2.3 in) over the course of 11 days.

January Precipitation Trends in Downey

The chart displays monthly precipitation patterns in Downey, 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 Downey, January typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 11 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 Downey

In Downey in January, humidity is 95%. With an average temperature of -6°C (22°F), this humidity feels like a biting chill that penetrates layers of clothing, making outdoor activities uncomfortable and breath feel heavy, even as the cold air clings to your skin.

January Average Humidity in Downey

This chart illustrates the average monthly humidity levels in Downey, 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 Downey is approximately 95%, 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 Downey

In Downey 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 Downey, you can check the information here.

Maximum UV Index Levels in Downey for January

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

Data source: Downey 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 Downey Compares to Other Months

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

This table compares monthly weather conditions in Downey, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (22°F)	59 mm (2.3 inches)	95%	moderate
February Weather	-4°C (25°F)	78 mm (3.1 inches)	95%	moderate
March Weather	1°C (33°F)	50 mm (2.0 inches)	90%	very high
April Weather	5°C (41°F)	69 mm (2.7 inches)	81%	very high
May Weather	11°C (51°F)	60 mm (2.4 inches)	71%	very high
June Weather	17°C (63°F)	29 mm (1.1 inches)	64%	extreme
July Weather	22°C (72°F)	14 mm (0.6 inches)	59%	extreme
August Weather	21°C (70°F)	22 mm (0.9 inches)	49%	very high
September Weather	15°C (60°F)	35 mm (1.4 inches)	52%	very high
October Weather	6°C (44°F)	45 mm (1.8 inches)	69%	high
November Weather	1°C (33°F)	46 mm (1.8 inches)	86%	moderate
December Weather	-5°C (23°F)	54 mm (2.1 inches)	91%	moderate