January Weather in Barstow, United States

Last updated: June 24, 2025

In January, the average temperature in Barstow, United States hovers around 9°C (49°F). Expect a chilly range where minimums can dip to -2°C (29°F), while highs may reach up to 23°C (73°F). This month also sees an average precipitation of 22 mm (0.9 in) spread over 3 days, coupled with an average humidity of 76%. Prepare accordingly for a mix of cool and comfortable weather!

January Temperature in Barstow

In January, in Barstow, the average temperature is 9°C (49°F). Maximum temperatures can reach 23°C (73°F), while minimums can drop as low as -2°C (29°F). Be prepared for a wide range of temperatures if you're planning to travel during this month.

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

The chart illustrates January temperature patterns in Barstow, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Barstow, January typically has an average temperature of 9°C (49°F), with highs reaching up to 23°C (73°F) and lows dropping to around -2°C (29°F).

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

January Precipitation in Barstow

In Barstow in January, the precipitation amount is 22 mm (0.9 in) over a span of 3 days.

January Precipitation Trends in Barstow

The chart displays monthly precipitation patterns in Barstow, 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 Barstow, January typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 3 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 Barstow

In Barstow in January, humidity is 76%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace, making outdoor adventures a bit uncomfortable as the dampness seeps into your clothes and lingers in the air, often leading to a sense of coolness that can be refreshing but also dampens the joy of exploration.

January Average Humidity in Barstow

This chart illustrates the average monthly humidity levels in Barstow, 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 Barstow is approximately 76%, 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 Barstow

In Barstow in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Barstow for better planning.

Maximum UV Index Levels in Barstow for January

The chart shows the monthly maximum UV Index (UVI) for Barstow 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 Barstow typically reaches 4, which falls under the moderate exposure category.

Data source: Barstow 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 Barstow Compares to Other Months

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

This table compares monthly weather conditions in Barstow, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	22 mm (0.9 inches)	76%	moderate
February Weather	11°C (51°F)	13 mm (0.5 inches)	80%	high
March Weather	14°C (57°F)	17 mm (0.7 inches)	69%	very high
April Weather	18°C (65°F)	11 mm (0.4 inches)	57%	very high
May Weather	22°C (71°F)	3 mm (0.1 inches)	45%	extreme
June Weather	28°C (83°F)	1 mm (0.0 inches)	34%	extreme
July Weather	31°C (89°F)	3 mm (0.1 inches)	29%	extreme
August Weather	31°C (88°F)	1 mm (0.0 inches)	28%	extreme
September Weather	27°C (80°F)	1 mm (0.0 inches)	41%	very high
October Weather	19°C (67°F)	2 mm (0.1 inches)	54%	very high
November Weather	14°C (57°F)	6 mm (0.2 inches)	68%	moderate
December Weather	8°C (47°F)	19 mm (0.7 inches)	75%	moderate