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January Weather in Interlaken, United States

Last updated: June 24, 2025

In January, the average temperature in Interlaken, United States hovers around 2°C (37°F), with a minimum that can plunge to -15°C (5°F) and a maximum reaching up to 18°C (64°F). Expect about 78 mm (3.1 in) of precipitation spread over 9 days, contributing to an average humidity of 84%. Prepare for a chilly and damp month ahead!

January Temperature in Interlaken

In January in Interlaken, the average temperature is 2°C (37°F), with maximums reaching 18°C (64°F) and minimums dropping as low as -15°C (5°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack both warm clothing for the cold nights and lighter layers for the warmer days.

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

The chart illustrates January temperature patterns in Interlaken, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Interlaken, January typically has an average temperature of 2°C (37°F), with highs reaching up to 18°C (64°F) and lows dropping to around -15°C (5°F).
JanFebMarAprMayJunJulAugSepOctNovDec363842516070777670624941
Data source: Temperature data for Interlaken generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Interlaken

In Interlaken in January, the precipitation amount is 78 mm (3.1 in) over the course of 9 days.

January Precipitation Trends in Interlaken

The chart displays monthly precipitation patterns in Interlaken, 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 Interlaken, January typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7812910912412989129126102153100127
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Interlaken

In Interlaken in January, humidity is 84%. With an average temperature of 2°C (37°F), this humidity feels like an uncomfortable chill that seeps into your bones, making outdoor activities less enjoyable and prompting the need for layered clothing to stay warm and dry.

January Average Humidity in Interlaken

This chart illustrates the average monthly humidity levels in Interlaken, 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 Interlaken is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Interlaken

In Interlaken 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 Interlaken, you can check the information here.

Maximum UV Index Levels in Interlaken for January

The chart shows the monthly maximum UV Index (UVI) for Interlaken 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 Interlaken typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Interlaken 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 Interlaken Compares to Other Months

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

This table compares monthly weather conditions in Interlaken, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (37°F)78 mm (3.1 inches)84%moderate
February Weather4°C (39°F)129 mm (5.1 inches)82%moderate
March Weather6°C (43°F)109 mm (4.3 inches)81%high
April Weather11°C (51°F)124 mm (4.9 inches)78%very high
May Weather15°C (60°F)129 mm (5.1 inches)69%very high
June Weather21°C (70°F)89 mm (3.5 inches)69%very high
July Weather25°C (77°F)129 mm (5.1 inches)62%very high
August Weather24°C (76°F)126 mm (4.9 inches)65%very high
September Weather21°C (71°F)102 mm (4.0 inches)68%very high
October Weather17°C (62°F)153 mm (6.0 inches)74%high
November Weather9°C (49°F)100 mm (3.9 inches)82%moderate
December Weather5°C (41°F)127 mm (5.0 inches)80%low

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