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January Weather in Calais, United States

Last updated: June 24, 2025

In January, the average temperature in Calais, United States hovers around -6°C (22°F), with extremes ranging from a chilly -28°C (-17°F) to a warmer 12°C (54°F). Expect 98 mm (3.9 in) of precipitation over approximately 8 days, all while experiencing an average humidity level of 83%.

January Temperature in Calais

In January in Calais, the average temperature is -6°C (22°F). Maximum can reach 12°C (54°F) and minimum can be as low as -28°C (-17°F). Travelers should be prepared for a wide range of temperatures and dress accordingly to ensure comfort during their visit.

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

The chart illustrates January temperature patterns in Calais, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Calais, January typically has an average temperature of -6°C (22°F), with highs reaching up to 12°C (54°F) and lows dropping to around -28°C (-17°F).
JanFebMarAprMayJunJulAugSepOctNovDec212330425262686860503726
Data source: Temperature data for Calais 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 Calais

In Calais in January, the total precipitation amount is 98 mm (3.9 in), occurring over 8 days.

January Precipitation Trends in Calais

The chart displays monthly precipitation patterns in Calais, 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 Calais, January typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec99907212010791917688109136122
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Calais

In Calais in January, humidity is 83%. With an average temperature of -6°C (22°F), this humidity feels like an uncomfortable chill that seeps into your bones, making travel tiresome and the air feel heavy, dampening the usual enjoyment of exploring the surroundings.

January Average Humidity in Calais

This chart illustrates the average monthly humidity levels in Calais, 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 Calais is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%84%82%80%78%82%84%82%82%82%84%82%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Calais

In Calais 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 Calais, you can visit Hourly UV Index in Calais.

Maximum UV Index Levels in Calais for January

The chart shows the monthly maximum UV Index (UVI) for Calais 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 Calais typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245799887532
Data source: Calais 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 Calais Compares to Other Months

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

This table compares monthly weather conditions in Calais, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)98 mm (3.9 inches)83%low
February Weather-5°C (23°F)90 mm (3.5 inches)84%moderate
March Weather-1°C (30°F)72 mm (2.8 inches)82%moderate
April Weather5°C (42°F)119 mm (4.7 inches)80%high
May Weather11°C (53°F)107 mm (4.2 inches)78%very high
June Weather17°C (62°F)91 mm (3.6 inches)82%very high
July Weather20°C (68°F)91 mm (3.6 inches)84%very high
August Weather20°C (68°F)76 mm (3.0 inches)82%very high
September Weather16°C (61°F)88 mm (3.5 inches)82%high
October Weather10°C (50°F)109 mm (4.3 inches)82%moderate
November Weather3°C (37°F)136 mm (5.4 inches)84%moderate
December Weather-3°C (26°F)122 mm (4.8 inches)82%low

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