January Weather in Castle Hills, United States

Last updated: June 24, 2025

In January, the average temperature in Castle Hills, United States hovers around 11°C (53°F). Expect temperatures to vary significantly, with a minimum as low as -7°C (20°F) and a maximum reaching 27°C (81°F). This month also brings about 44 mm (1.7 in) of precipitation over approximately 6 days, while maintaining an average humidity level of 79%.

January Temperature in Castle Hills

In January in Castle Hills, the average temperature is 11°C (53°F). The maximum can reach 27°C (81°F), and the minimum can be as low as -7°C (20°F). Be prepared for a variety of weather conditions if you plan to travel during this time.

January Weather in Castle Hills: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Castle Hills, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castle Hills, January typically has an average temperature of 11°C (53°F), with highs reaching up to 27°C (81°F) and lows dropping to around -7°C (20°F).

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

January Precipitation in Castle Hills

In Castle Hills in January, the total precipitation amount is 44 mm (1.7 in) spread over 6 days.

January Precipitation Trends in Castle Hills

The chart displays monthly precipitation patterns in Castle Hills, 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 Castle Hills, January typically receives around 44 mm (1.7 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Castle Hills

In Castle Hills in January, humidity is 79%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that can make traveling uncomfortable, as the cool air clings to your skin and dampens your clothes, leaving you seeking shelter and a warm drink more often than not.

January Average Humidity in Castle Hills

This chart illustrates the average monthly humidity levels in Castle Hills, 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 Castle Hills is approximately 79%, 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 Castle Hills

In Castle Hills in January, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Castle Hills.

Maximum UV Index Levels in Castle Hills for January

The chart shows the monthly maximum UV Index (UVI) for Castle Hills 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 Castle Hills typically reaches 5, which falls under the moderate exposure category.

Data source: Castle Hills 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 Castle Hills Compares to Other Months

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

This table compares monthly weather conditions in Castle Hills, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (53°F)	44 mm (1.7 inches)	79%	moderate
February Weather	13°C (55°F)	58 mm (2.3 inches)	79%	very high
March Weather	18°C (65°F)	62 mm (2.5 inches)	74%	very high
April Weather	21°C (70°F)	71 mm (2.8 inches)	76%	extreme
May Weather	25°C (77°F)	130 mm (5.1 inches)	81%	extreme
June Weather	28°C (83°F)	78 mm (3.1 inches)	76%	extreme
July Weather	29°C (85°F)	69 mm (2.7 inches)	66%	extreme
August Weather	30°C (86°F)	56 mm (2.2 inches)	58%	extreme
September Weather	27°C (80°F)	117 mm (4.6 inches)	65%	extreme
October Weather	22°C (72°F)	89 mm (3.5 inches)	74%	very high
November Weather	16°C (61°F)	46 mm (1.8 inches)	81%	high
December Weather	13°C (56°F)	57 mm (2.3 inches)	86%	moderate