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January Weather in Star Valley, United States

Last updated: June 24, 2025

In January, the average temperature in Star Valley, United States hovers around 4°C (40°F), creating a chilly atmosphere. Expect minimum temperatures to dip as low as -12°C (11°F), while the mercury can rise to a pleasant 18°C (66°F). The region sees an average precipitation of 64 mm (2.5 in) over 6 days, contributing to a humid environment with an average humidity of 80%.

January Temperature in Star Valley

In January in Star Valley, the average temperature is 4°C (40°F). Maximums can reach 18°C (66°F) and minimums can be as low as -12°C (11°F). Travelers should be prepared for a wide range of temperatures, so packing layers is essential.

January Weather in Star Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Star Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Star Valley, January typically has an average temperature of 4°C (40°F), with highs reaching up to 18°C (66°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec394146566375767570584941
Data source: Temperature data for Star Valley 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 Star Valley

In Star Valley in January, the total precipitation amount is 64 mm (2.5 in) during a span of 6 days.

January Precipitation Trends in Star Valley

The chart displays monthly precipitation patterns in Star Valley, 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 Star Valley, January typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec648065111771115036363252
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Star Valley

In Star Valley in January, humidity is 80%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and requiring careful planning for warmth and moisture management.

January Average Humidity in Star Valley

This chart illustrates the average monthly humidity levels in Star Valley, 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 Star Valley is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%83%72%63%46%35%33%41%59%70%79%82%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Star Valley

In Star Valley 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 Star Valley for better planning.

Maximum UV Index Levels in Star Valley for January

The chart shows the monthly maximum UV Index (UVI) for Star Valley 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 Star Valley typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111213121111865
Data source: Star Valley 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 Star Valley Compares to Other Months

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

This table compares monthly weather conditions in Star Valley, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)64 mm (2.5 inches)80%moderate
February Weather5°C (41°F)80 mm (3.1 inches)83%high
March Weather8°C (47°F)64 mm (2.5 inches)72%very high
April Weather13°C (56°F)11 mm (0.4 inches)63%extreme
May Weather17°C (63°F)17 mm (0.7 inches)46%extreme
June Weather24°C (75°F)7 mm (0.3 inches)35%extreme
July Weather24°C (76°F)111 mm (4.4 inches)33%extreme
August Weather24°C (75°F)50 mm (1.9 inches)41%extreme
September Weather21°C (70°F)36 mm (1.4 inches)59%extreme
October Weather15°C (59°F)36 mm (1.4 inches)70%very high
November Weather10°C (50°F)32 mm (1.3 inches)79%high
December Weather5°C (41°F)51 mm (2.0 inches)82%moderate

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