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January Weather in Lake Arrowhead, United States

Last updated: June 24, 2025

In January, the average temperature in Lake Arrowhead, United States hovers around -5°C (24°F). Be prepared for chilly conditions as the minimum can plummet to -26°C (-14°F), while the maximum may reach a mild 15°C (59°F). With 79 mm (3.1 in) of precipitation spread over 8 days, you can expect some wet weather. Additionally, an average humidity of 86% adds to the brisk atmosphere, making layering essential for comfort!

January Temperature in Lake Arrowhead

In January in Lake Arrowhead, the average temperature is -5°C (24°F), with maximums reaching 15°C (59°F) and minimums plummeting to as low as -26°C (-14°F). Travelers should be prepared for a wide range of temperatures, ensuring they dress in layers to stay comfortable in both chilly and mild conditions.

January Weather in Lake Arrowhead: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Lake Arrowhead, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lake Arrowhead, January typically has an average temperature of -5°C (24°F), with highs reaching up to 15°C (59°F) and lows dropping to around -26°C (-14°F).
JanFebMarAprMayJunJulAugSepOctNovDec242633455666727164523828
Data source: Temperature data for Lake Arrowhead 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 Lake Arrowhead

In Lake Arrowhead in January, the precipitation amount is 79 mm (3.1 in) during 8 days, indicating a relatively wet period for the area.

January Precipitation Trends in Lake Arrowhead

The chart displays monthly precipitation patterns in Lake Arrowhead, 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 Lake Arrowhead, January typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec79897712374871468264121107114
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Lake Arrowhead

In Lake Arrowhead in January, humidity is 86%. With an average temperature of -5°C (24°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as even the slightest breeze becomes biting, and your clothing clings uncomfortably to your skin.

January Average Humidity in Lake Arrowhead

This chart illustrates the average monthly humidity levels in Lake Arrowhead, 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 Lake Arrowhead is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%82%80%72%72%67%66%71%79%84%81%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Lake Arrowhead

In Lake Arrowhead in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Lake Arrowhead, you can visit Hourly UV Index in Lake Arrowhead.

Maximum UV Index Levels in Lake Arrowhead for January

The chart shows the monthly maximum UV Index (UVI) for Lake Arrowhead 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 Lake Arrowhead typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Lake Arrowhead 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 Lake Arrowhead Compares to Other Months

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

This table compares monthly weather conditions in Lake Arrowhead, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)79 mm (3.1 inches)86%low
February Weather-3°C (26°F)89 mm (3.5 inches)84%moderate
March Weather0°C (33°F)77 mm (3.0 inches)82%moderate
April Weather7°C (45°F)123 mm (4.8 inches)80%very high
May Weather13°C (56°F)74 mm (2.9 inches)72%very high
June Weather19°C (67°F)87 mm (3.4 inches)72%very high
July Weather22°C (72°F)145 mm (5.7 inches)67%very high
August Weather22°C (71°F)82 mm (3.2 inches)66%very high
September Weather18°C (64°F)64 mm (2.5 inches)71%high
October Weather11°C (52°F)121 mm (4.8 inches)78%moderate
November Weather3°C (39°F)107 mm (4.2 inches)84%moderate
December Weather-2°C (28°F)114 mm (4.5 inches)81%low

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