January Weather in Post Falls, United States

Last updated: June 24, 2025

In January, the average temperature in Post Falls, United States hovers around -1°C (31°F), with lows plummeting to -20°C (-3°F) and highs reaching up to 9°C (49°F). This month brings about 92 mm (3.6 in) of precipitation over approximately 14 days, contributing to an average humidity level of 89%. Be prepared for chilly, damp days ahead!

January Temperature in Post Falls

In January in Post Falls, the average temperature is -1°C (31°F). The maximum can reach 9°C (49°F), while the minimum can drop as low as -20°C (-3°F). Be prepared for chilly conditions and dress warmly if you plan to visit during this time.

January Weather in Post Falls: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Post Falls, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Post Falls, January typically has an average temperature of -1°C (31°F), with highs reaching up to 9°C (49°F) and lows dropping to around -20°C (-3°F).

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

January Precipitation in Post Falls

In Post Falls in January, the precipitation amount is 92 mm (3.6 in) over the course of 14 days.

January Precipitation Trends in Post Falls

The chart displays monthly precipitation patterns in Post Falls, 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 Post Falls, January typically receives around 92 mm (3.6 inches) of precipitation spread over approximately 14 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 Post Falls

In Post Falls in January humidity is 89%. With an average temperature of -1°C (31°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and urging you to seek warmth indoors.

January Average Humidity in Post Falls

This chart illustrates the average monthly humidity levels in Post Falls, 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 Post Falls is approximately 89%, 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 Post Falls

In Post Falls 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 Post Falls, you can visit Hourly UV Index in Post Falls.

Maximum UV Index Levels in Post Falls for January

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

Data source: Post Falls 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 Post Falls Compares to Other Months

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

This table compares monthly weather conditions in Post Falls, 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)	92 mm (3.6 inches)	89%	low
February Weather	-1°C (30°F)	88 mm (3.4 inches)	89%	moderate
March Weather	3°C (38°F)	76 mm (3.0 inches)	87%	moderate
April Weather	8°C (46°F)	72 mm (2.8 inches)	84%	high
May Weather	13°C (56°F)	60 mm (2.3 inches)	77%	very high
June Weather	18°C (65°F)	30 mm (1.2 inches)	78%	very high
July Weather	23°C (73°F)	5 mm (0.2 inches)	77%	very high
August Weather	22°C (72°F)	13 mm (0.5 inches)	64%	very high
September Weather	16°C (61°F)	42 mm (1.6 inches)	62%	high
October Weather	8°C (47°F)	74 mm (2.9 inches)	79%	moderate
November Weather	3°C (38°F)	103 mm (4.1 inches)	87%	moderate
December Weather	0°C (32°F)	95 mm (3.8 inches)	90%	low