January Weather in Siletz, United States

Last updated: June 24, 2025

In January, the average temperature in Siletz, United States hovers around 8°C (46°F). Expect a chill in the air with minimum temperatures dipping to -1°C (30°F), while highs can reach up to 14°C (57°F). Be prepared for some wet weather, as precipitation totals about 271 mm (10.7 in) over 18 days, coupled with an average humidity of 85%.

January Temperature in Siletz

In January in Siletz, the average temperature is 8°C (46°F). Maximums can reach 14°C (57°F), and minimums can drop as low as -1°C (30°F). It's advisable to pack warm layers if you're planning to travel during this time.

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

The chart illustrates January temperature patterns in Siletz, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siletz, January typically has an average temperature of 8°C (46°F), with highs reaching up to 14°C (57°F) and lows dropping to around -1°C (30°F).

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

January Precipitation in Siletz

In Siletz in January, the total precipitation amount is 271 mm (10.7 in) during a span of 18 days.

January Precipitation Trends in Siletz

The chart displays monthly precipitation patterns in Siletz, 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 Siletz, January typically receives around 271 mm (10.7 inches) of precipitation spread over approximately 18 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 Siletz

In Siletz in January humidity is 85%. With an average temperature of 8°C (46°F), this humidity feels like a cold, damp embrace that can leave travelers feeling chilled and uncomfortable, making outdoor exploration less appealing and encouraging the search for cozy indoor activities instead.

January Average Humidity in Siletz

This chart illustrates the average monthly humidity levels in Siletz, 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 Siletz is approximately 85%, 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 Siletz

In Siletz in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Siletz, you can visit Hourly UV Index in Siletz.

Maximum UV Index Levels in Siletz for January

The chart shows the monthly maximum UV Index (UVI) for Siletz 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 Siletz typically reaches 2, which falls under the low exposure category.

Data source: Siletz 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 Siletz Compares to Other Months

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

This table compares monthly weather conditions in Siletz, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (46°F)	271 mm (10.7 inches)	85%	low
February Weather	7°C (44°F)	248 mm (9.8 inches)	84%	moderate
March Weather	8°C (46°F)	191 mm (7.5 inches)	85%	high
April Weather	9°C (49°F)	158 mm (6.2 inches)	83%	high
May Weather	11°C (52°F)	74 mm (2.9 inches)	83%	very high
June Weather	13°C (56°F)	62 mm (2.4 inches)	83%	very high
July Weather	15°C (58°F)	9 mm (0.4 inches)	82%	very high
August Weather	15°C (59°F)	13 mm (0.5 inches)	74%	very high
September Weather	14°C (58°F)	71 mm (2.8 inches)	71%	high
October Weather	12°C (54°F)	151 mm (5.9 inches)	81%	moderate
November Weather	10°C (50°F)	254 mm (10.0 inches)	87%	moderate
December Weather	8°C (46°F)	292 mm (11.5 inches)	87%	low