January Weather in Fort Irwin, United States

Last updated: June 24, 2025

In January, the average temperature in Fort Irwin, United States hovers around 9°C (48°F). Expect temperature fluctuations with minimums dipping to -3°C (26°F) and maximums soaring to 22°C (71°F). During this time, precipitation averages 22 mm (0.9 in) over about 3 days, and the air remains comfortably humid with an average humidity of 76%.

January Temperature in Fort Irwin

In January in Fort Irwin, the average temperature is 9°C (48°F), with maximums reaching 22°C (71°F) and minimums dropping as low as -3°C (26°F). This variation in temperature makes Fort Irwin a place of diverse weather, so travelers should pack accordingly for both warmer days and chilly evenings.

January Weather in Fort Irwin: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Fort Irwin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fort Irwin, January typically has an average temperature of 9°C (48°F), with highs reaching up to 22°C (71°F) and lows dropping to around -3°C (26°F).

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

January Precipitation in Fort Irwin

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

January Precipitation Trends in Fort Irwin

The chart displays monthly precipitation patterns in Fort Irwin, 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 Fort Irwin, 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.

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Millimeters (mm) Inches (in)

January Humidity in Fort Irwin

In Fort Irwin in January humidity is 76%. With an average temperature of 9°C (48°F), this humidity feels like a chilly embrace, making outdoor activities feel damp and brisk, potentially leaving you feeling colder than the temperature suggests.

January Average Humidity in Fort Irwin

This chart illustrates the average monthly humidity levels in Fort Irwin, 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 Fort Irwin 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 Fort Irwin

In Fort Irwin 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 Fort Irwin for better planning.

Maximum UV Index Levels in Fort Irwin for January

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

Data source: Fort Irwin 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 Fort Irwin Compares to Other Months

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

This table compares monthly weather conditions in Fort Irwin, 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 (48°F)	22 mm (0.9 inches)	76%	moderate
February Weather	10°C (51°F)	15 mm (0.6 inches)	80%	high
March Weather	13°C (57°F)	17 mm (0.7 inches)	69%	very high
April Weather	18°C (65°F)	12 mm (0.5 inches)	57%	very high
May Weather	22°C (72°F)	4 mm (0.2 inches)	45%	extreme
June Weather	28°C (83°F)	1 mm (0.0 inches)	34%	extreme
July Weather	32°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)	3 mm (0.1 inches)	54%	high
November Weather	13°C (56°F)	6 mm (0.2 inches)	68%	moderate
December Weather	8°C (46°F)	18 mm (0.7 inches)	75%	moderate