January Weather in Boulder Creek, United States

Last updated: June 24, 2025

In January, the average temperature in Boulder Creek, United States hovers around 10°C (51°F). Expect lows of 0°C (32°F) and highs reaching 24°C (75°F). The region sees about 145 mm (5.7 in) of precipitation over 8 days, contributing to an average humidity of 82%. Stay prepared for a typically cool and wet month!

January Temperature in Boulder Creek

In January in Boulder Creek, the average temperature is 10°C (51°F). Maximum temperatures can reach 24°C (75°F), while minimum temperatures can drop as low as 0°C (32°F). This climate makes Boulder Creek a great destination for travelers seeking mild weather and the opportunity to enjoy both warm and cool experiences.

January Weather in Boulder Creek: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Boulder Creek, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boulder Creek, January typically has an average temperature of 10°C (51°F), with highs reaching up to 24°C (75°F) and lows dropping to around 0°C (32°F).

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

January Precipitation in Boulder Creek

In Boulder Creek in January, the precipitation amount is 145 mm (5.7 in) over a span of 8 days.

January Precipitation Trends in Boulder Creek

The chart displays monthly precipitation patterns in Boulder Creek, 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 Boulder Creek, January typically receives around 145 mm (5.7 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 Boulder Creek

In Boulder Creek in January humidity is 82%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill that clings to your skin, making outdoor adventures less appealing and prompting travelers to seek cozy indoor activities or warm drinks to counter the brisk air.

January Average Humidity in Boulder Creek

This chart illustrates the average monthly humidity levels in Boulder Creek, 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 Boulder Creek 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 Boulder Creek

In Boulder Creek in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Boulder Creek for better planning.

Maximum UV Index Levels in Boulder Creek for January

The chart shows the monthly maximum UV Index (UVI) for Boulder Creek 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 Boulder Creek typically reaches 4, which falls under the moderate exposure category.

Data source: Boulder Creek 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 Boulder Creek Compares to Other Months

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

This table compares monthly weather conditions in Boulder Creek, 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 (51°F)	145 mm (5.7 inches)	82%	moderate
February Weather	11°C (52°F)	133 mm (5.2 inches)	84%	moderate
March Weather	11°C (53°F)	114 mm (4.5 inches)	82%	very high
April Weather	13°C (56°F)	37 mm (1.4 inches)	78%	very high
May Weather	15°C (59°F)	24 mm (0.9 inches)	71%	extreme
June Weather	18°C (64°F)	1 mm (0.0 inches)	64%	extreme
July Weather	19°C (66°F)	0 mm (0.0 inches)	58%	extreme
August Weather	19°C (67°F)	0 mm (0.0 inches)	54%	very high
September Weather	19°C (67°F)	3 mm (0.1 inches)	55%	very high
October Weather	17°C (63°F)	25 mm (1.0 inches)	62%	high
November Weather	13°C (56°F)	56 mm (2.2 inches)	78%	moderate
December Weather	10°C (50°F)	116 mm (4.6 inches)	80%	moderate