January Weather in Castlewood, United States

Last updated: June 24, 2025

In January, the average temperature in Castlewood, United States hovers around -10°C (15°F). Expect chilly extremes, with minimums plummeting to -36°C (-33°F) and maximums reaching up to 7°C (45°F). Precipitation is minimal at 22 mm (0.9 in) spread over just 4 days. With an average humidity of 85%, be prepared for a crisp, frosty ambiance!

January Temperature in Castlewood

In January in Castlewood, the average temperature is -10°C (15°F), with maximums reaching 7°C (45°F) and minimums dipping as low as -36°C (-33°F). Travelers should be prepared for extreme cold conditions and dress warmly if visiting during this time.

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

The chart illustrates January temperature patterns in Castlewood, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castlewood, January typically has an average temperature of -10°C (15°F), with highs reaching up to 7°C (45°F) and lows dropping to around -36°C (-33°F).

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

January Precipitation in Castlewood

In Castlewood in January, the precipitation amount is 22 mm (0.9 in) over a duration of 4 days.

January Precipitation Trends in Castlewood

The chart displays monthly precipitation patterns in Castlewood, 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 Castlewood, January typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 4 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 Castlewood

In Castlewood in January humidity is 85%. With an average temperature of -10°C (15°F), this humidity feels like an uncomfortable chill that cuts through layers of clothing, making it challenging to enjoy outdoor activities or explore the area comfortably.

January Average Humidity in Castlewood

This chart illustrates the average monthly humidity levels in Castlewood, 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 Castlewood 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 Castlewood

In Castlewood 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 Castlewood, you can check the information here.

Maximum UV Index Levels in Castlewood for January

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

Data source: Castlewood 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 Castlewood Compares to Other Months

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

This table compares monthly weather conditions in Castlewood, 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 (15°F)	22 mm (0.9 inches)	85%	moderate
February Weather	-10°C (15°F)	18 mm (0.7 inches)	89%	moderate
March Weather	-1°C (31°F)	50 mm (2.0 inches)	81%	high
April Weather	5°C (41°F)	68 mm (2.7 inches)	82%	very high
May Weather	13°C (56°F)	89 mm (3.5 inches)	76%	very high
June Weather	21°C (70°F)	79 mm (3.1 inches)	81%	very high
July Weather	23°C (73°F)	83 mm (3.3 inches)	82%	very high
August Weather	21°C (70°F)	109 mm (4.3 inches)	83%	very high
September Weather	17°C (63°F)	88 mm (3.5 inches)	82%	very high
October Weather	7°C (46°F)	77 mm (3.0 inches)	82%	moderate
November Weather	0°C (33°F)	26 mm (1.0 inches)	87%	moderate
December Weather	-5°C (24°F)	31 mm (1.2 inches)	84%	low