January Weather in Mammoth, United States

Last updated: June 24, 2025

In January, the average temperature in Mammoth, United States hovers around 10°C (49°F). Expect a range of -5°C (23°F) to 23°C (74°F) throughout the month. With an average humidity of 76% and 44 mm (1.7 in) of precipitation over 4 days, it’s a good idea to prepare for both cooler and wetter conditions.

January Temperature in Mammoth

In January in Mammoth, the average temperature is 10°C (49°F). The maximum can reach 23°C (74°F) and the minimum can be as low as -5°C (23°F). Be prepared for a wide range of temperatures during your visit, so pack accordingly!

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

The chart illustrates January temperature patterns in Mammoth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mammoth, January typically has an average temperature of 10°C (49°F), with highs reaching up to 23°C (74°F) and lows dropping to around -5°C (23°F).

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

January Precipitation in Mammoth

In Mammoth in January, the precipitation amount is 44 mm (1.7 in) over the course of 4 days.

January Precipitation Trends in Mammoth

The chart displays monthly precipitation patterns in Mammoth, 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 Mammoth, January typically receives around 44 mm (1.7 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 Mammoth

In Mammoth in January, humidity is 76%. With an average temperature of 10°C (49°F), this humidity feels like a brisk chill that clings to your skin, making outdoor adventures feel damp and slightly uncomfortable for traveling.

January Average Humidity in Mammoth

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

In Mammoth 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 Mammoth.

Maximum UV Index Levels in Mammoth for January

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

Data source: Mammoth 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 Mammoth Compares to Other Months

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

This table compares monthly weather conditions in Mammoth, 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 (49°F)	44 mm (1.7 inches)	76%	moderate
February Weather	11°C (51°F)	50 mm (2.0 inches)	79%	high
March Weather	15°C (58°F)	30 mm (1.2 inches)	67%	very high
April Weather	20°C (68°F)	5 mm (0.2 inches)	55%	extreme
May Weather	24°C (75°F)	7 mm (0.3 inches)	40%	extreme
June Weather	30°C (85°F)	11 mm (0.4 inches)	33%	extreme
July Weather	30°C (85°F)	84 mm (3.3 inches)	34%	extreme
August Weather	29°C (84°F)	55 mm (2.2 inches)	48%	extreme
September Weather	26°C (80°F)	39 mm (1.5 inches)	64%	extreme
October Weather	21°C (69°F)	28 mm (1.1 inches)	67%	very high
November Weather	15°C (60°F)	23 mm (0.9 inches)	77%	high
December Weather	10°C (51°F)	37 mm (1.5 inches)	82%	moderate