January Weather in Crystal Lake, United States

Last updated: June 24, 2025

In January, the average temperature in Crystal Lake, United States is a comfortable 16°C (62°F). Temperatures can vary significantly, with a minimum of -3°C (26°F) and a maximum reaching 29°C (85°F). Expect about 40 mm (1.6 in) of precipitation spread over 4 days, contributing to an average humidity of 83%. Be prepared for a mix of weather as you explore this charming destination!

January Temperature in Crystal Lake

In January in Crystal Lake, the average temperature is 16°C (62°F). Maximums can reach 29°C (85°F), while minimums can dip as low as -3°C (26°F). Be prepared for a wide range of temperatures if you're planning to travel during this month.

January Weather in Crystal Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Crystal Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Crystal Lake, January typically has an average temperature of 16°C (62°F), with highs reaching up to 29°C (85°F) and lows dropping to around -3°C (26°F).

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

January Precipitation in Crystal Lake

In Crystal Lake in January, the precipitation amount is 40 mm (1.6 in) spread over a duration of 4 days.

January Precipitation Trends in Crystal Lake

The chart displays monthly precipitation patterns in Crystal Lake, 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 Crystal Lake, January typically receives around 40 mm (1.6 inches) of precipitation spread over approximately 4 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Crystal Lake

In Crystal Lake in January humidity is 83%. With an average temperature of 16°C (62°F), this humidity feels like a warm, sticky embrace that can make traveling feel a bit heavy, leaving you longing for refreshing breezes and shaded spots to relax in.

January Average Humidity in Crystal Lake

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

In Crystal Lake in January, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Crystal Lake, you can refer to this Hourly UV Index in Crystal Lake.

Maximum UV Index Levels in Crystal Lake for January

The chart shows the monthly maximum UV Index (UVI) for Crystal Lake 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 Crystal Lake typically reaches 6, which falls under the high exposure category.

Data source: Crystal Lake 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 Crystal Lake Compares to Other Months

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

This table compares monthly weather conditions in Crystal Lake, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (62°F)	40 mm (1.6 inches)	83%	high
February Weather	20°C (68°F)	59 mm (2.3 inches)	80%	very high
March Weather	21°C (69°F)	17 mm (0.7 inches)	75%	very high
April Weather	23°C (74°F)	66 mm (2.6 inches)	68%	extreme
May Weather	26°C (79°F)	130 mm (5.1 inches)	65%	extreme
June Weather	27°C (81°F)	222 mm (8.7 inches)	73%	extreme
July Weather	27°C (82°F)	249 mm (9.8 inches)	77%	extreme
August Weather	28°C (82°F)	231 mm (9.1 inches)	80%	extreme
September Weather	27°C (81°F)	186 mm (7.3 inches)	83%	extreme
October Weather	25°C (78°F)	73 mm (2.9 inches)	83%	very high
November Weather	21°C (69°F)	44 mm (1.7 inches)	83%	high
December Weather	18°C (65°F)	58 mm (2.3 inches)	84%	moderate