January Weather in Mill Creek, United States

Last updated: June 24, 2025

In Mill Creek, United States, the average temperature in January hovers around -1°C (31°F). Expect minimums plunging to -24°C (-11°F) and maximums reaching up to 18°C (64°F). During this month, precipitation totals 104 mm (4.1 in) across 16 days, contributing to the region's average humidity of a notable 88%.

January Temperature in Mill Creek

In January in Mill Creek, the average temperature is -1°C (31°F). Maximum temperatures can reach 18°C (64°F), while minimums can drop as low as -24°C (-11°F). Travelers should be prepared for a wide temperature range and dress accordingly for both chilly and mild conditions.

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

The chart illustrates January temperature patterns in Mill Creek, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mill Creek, January typically has an average temperature of -1°C (31°F), with highs reaching up to 18°C (64°F) and lows dropping to around -24°C (-11°F).

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

January Precipitation in Mill Creek

In Mill Creek in January, the total precipitation amount is 104 mm (4.1 in), distributed over 16 days.

January Precipitation Trends in Mill Creek

The chart displays monthly precipitation patterns in Mill 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 Mill Creek, January typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 16 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 Mill Creek

In Mill Creek in January, humidity is 88%. With an average temperature of -1°C (31°F), this humidity feels like a biting cold that penetrates your clothing, making outdoor exploration challenging and the air clingy, adding an extra chill that can make you feel even colder than the temperature suggests.

January Average Humidity in Mill Creek

This chart illustrates the average monthly humidity levels in Mill 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 Mill Creek is approximately 88%, 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 Mill Creek

In Mill Creek 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 Mill Creek, you can check the information here.

Maximum UV Index Levels in Mill Creek for January

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

Data source: Mill 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 Mill Creek Compares to Other Months

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

This table compares monthly weather conditions in Mill Creek, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	104 mm (4.1 inches)	88%	moderate
February Weather	2°C (36°F)	158 mm (6.2 inches)	88%	moderate
March Weather	5°C (41°F)	127 mm (5.0 inches)	88%	high
April Weather	10°C (50°F)	160 mm (6.3 inches)	86%	very high
May Weather	15°C (60°F)	174 mm (6.9 inches)	82%	extreme
June Weather	19°C (66°F)	141 mm (5.6 inches)	84%	extreme
July Weather	21°C (70°F)	120 mm (4.7 inches)	82%	extreme
August Weather	20°C (68°F)	144 mm (5.7 inches)	73%	very high
September Weather	18°C (64°F)	116 mm (4.6 inches)	73%	very high
October Weather	13°C (55°F)	129 mm (5.1 inches)	81%	high
November Weather	5°C (41°F)	91 mm (3.6 inches)	89%	moderate
December Weather	2°C (36°F)	129 mm (5.1 inches)	86%	moderate