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January Weather in Mount Washington, United States

Last updated: June 24, 2025

In Mount Washington, United States, the average temperature in January hovers around 2°C (36°F). Expect a chill, with minimums dipping to a brisk -17°C (1°F), while daytime highs can reach a cozy 20°C (68°F). During this month, you’ll likely experience 93 mm (3.7 in) of precipitation spread over approximately 10 days, complemented by an average humidity of 87%.

January Temperature in Mount Washington

In January in Mount Washington, the average temperature is 2°C (36°F). The maximum can reach 20°C (68°F), while the minimum can drop as low as -17°C (1°F). It's important for travelers to be prepared for a wide range of temperatures during this time.

January Weather in Mount Washington: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Mount Washington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mount Washington, January typically has an average temperature of 2°C (36°F), with highs reaching up to 20°C (68°F) and lows dropping to around -17°C (1°F).
JanFebMarAprMayJunJulAugSepOctNovDec364048566874787672614541
Data source: Temperature data for Mount Washington 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 Mount Washington

In Mount Washington in January, the precipitation amount is 93 mm (3.7 in) over the course of 10 days.

January Precipitation Trends in Mount Washington

The chart displays monthly precipitation patterns in Mount Washington, 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 Mount Washington, January typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec931421371421211611019611910288115
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Mount Washington

In Mount Washington in January, humidity is 87%. With an average temperature of 2°C (36°F), this humidity feels like an unwelcome chill that seeps into your bones, making outdoor exploration feel damp and heavy, and encouraging travelers to seek the warmth of indoor attractions instead.

January Average Humidity in Mount Washington

This chart illustrates the average monthly humidity levels in Mount Washington, 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 Mount Washington is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%82%83%83%80%74%71%78%88%88%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Mount Washington

In Mount Washington 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 Mount Washington, you can check the information here.

Maximum UV Index Levels in Mount Washington for January

The chart shows the monthly maximum UV Index (UVI) for Mount Washington 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 Mount Washington typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110109753
Data source: Mount Washington 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 Mount Washington Compares to Other Months

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

This table compares monthly weather conditions in Mount Washington, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)93 mm (3.7 inches)87%moderate
February Weather5°C (41°F)142 mm (5.6 inches)86%moderate
March Weather9°C (48°F)137 mm (5.4 inches)86%high
April Weather13°C (56°F)142 mm (5.6 inches)82%very high
May Weather20°C (68°F)121 mm (4.7 inches)82%very high
June Weather24°C (75°F)161 mm (6.3 inches)83%extreme
July Weather26°C (79°F)101 mm (4.0 inches)80%very high
August Weather25°C (77°F)95 mm (3.8 inches)74%very high
September Weather22°C (72°F)119 mm (4.7 inches)71%very high
October Weather16°C (61°F)102 mm (4.0 inches)78%high
November Weather7°C (46°F)88 mm (3.5 inches)88%moderate
December Weather5°C (42°F)115 mm (4.5 inches)88%moderate

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