January Weather in Alta, United States

Last updated: June 24, 2025

In January, the average temperature in Alta, United States hovers at a cool 4°C (39°F). During this time, temperatures can dip as low as -10°C (14°F), while reaching a pleasant high of 19°C (67°F). Prepare for 289 mm (11.4 in) of precipitation spread over approximately 12 days, and be ready for a high humidity level of 84% that may leave the air feeling quite damp.

January Temperature in Alta

In January in Alta, the average temperature is 4°C (39°F), with maximums reaching 19°C (67°F) and minimums dropping as low as -10°C (14°F). Be prepared for a range of temperatures, and ensure you're dressed for both mild days and chilly evenings.

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

The chart illustrates January temperature patterns in Alta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alta, January typically has an average temperature of 4°C (39°F), with highs reaching up to 19°C (67°F) and lows dropping to around -10°C (14°F).

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

January Precipitation in Alta

In Alta in January, the precipitation amount is 289 mm (11.4 in) over the course of 12 days.

January Precipitation Trends in Alta

The chart displays monthly precipitation patterns in Alta, 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 Alta, January typically receives around 289 mm (11.4 inches) of precipitation spread over approximately 12 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 Alta

In Alta in January, humidity is 84%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making outdoor excursions uncomfortable and demanding more layers than you anticipate while traveling.

January Average Humidity in Alta

This chart illustrates the average monthly humidity levels in Alta, 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 Alta is approximately 84%, 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 Alta

In Alta 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 Alta, you can check the information here.

Maximum UV Index Levels in Alta for January

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

Data source: Alta 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 Alta Compares to Other Months

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

This table compares monthly weather conditions in Alta, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	289 mm (11.4 inches)	84%	moderate
February Weather	4°C (40°F)	295 mm (11.6 inches)	84%	moderate
March Weather	5°C (42°F)	284 mm (11.2 inches)	83%	very high
April Weather	9°C (49°F)	140 mm (5.5 inches)	81%	very high
May Weather	13°C (56°F)	90 mm (3.5 inches)	74%	extreme
June Weather	19°C (66°F)	20 mm (0.8 inches)	64%	extreme
July Weather	23°C (74°F)	3 mm (0.1 inches)	44%	extreme
August Weather	22°C (72°F)	6 mm (0.2 inches)	36%	very high
September Weather	18°C (65°F)	25 mm (1.0 inches)	44%	very high
October Weather	12°C (55°F)	77 mm (3.0 inches)	65%	high
November Weather	8°C (46°F)	163 mm (6.4 inches)	84%	moderate
December Weather	4°C (39°F)	225 mm (8.8 inches)	83%	moderate