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January Weather in Karis, Finland

Last updated: August 23, 2025

In January, the average temperature in Karis, Finland hovers around -1°C (30°F), with temperatures ranging from a chilly -18°C (0°F) at their lowest to a milder 8°C (46°F) at their peak. Be prepared for precipitation of about 60 mm (2.3 in) spread over 13 days, contributing to an average humidity of a staggering 92%. Dress warmly and embrace the winter season!

January Temperature in Karis

In January in Karis, the average temperature is -1°C (30°F), with maximums reaching up to 8°C (46°F) and minimums plummeting as low as -18°C (0°F). Travelers should be prepared for winter conditions and dress warmly to fully enjoy their visit.

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

The chart illustrates January temperature patterns in Karis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Karis, January typically has an average temperature of -1°C (30°F), with highs reaching up to 8°C (46°F) and lows dropping to around -18°C (0°F).
JanFebMarAprMayJunJulAugSepOctNovDec302832394860646355474033
Data source: Temperature data for Karis 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 Karis

In Karis in January, the precipitation amount is 60 mm (2.3 in) during 13 days, indicating a relatively wet period for that time of year.

January Precipitation Trends in Karis

The chart displays monthly precipitation patterns in Karis, 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 Karis, January typically receives around 60 mm (2.3 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec6050553647467386711107680
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Karis

In Karis in January humidity is 92%. With an average temperature of -1°C (30°F), this humidity feels like an icy blanket wrapping around you, making outdoor activities challenging and requiring extra layers to stay warm and dry while traveling.

January Average Humidity in Karis

This chart illustrates the average monthly humidity levels in Karis, 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 Karis is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%91%90%87%76%80%80%83%87%90%91%90%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Karis

In Karis in January, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Karis.

Maximum UV Index Levels in Karis for January

The chart shows the monthly maximum UV Index (UVI) for Karis 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 Karis typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113457754211
Data source: Karis 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 Karis Compares to Other Months

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

This table compares monthly weather conditions in Karis, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)60 mm (2.3 inches)92%low
February Weather-2°C (28°F)50 mm (2.0 inches)91%low
March Weather0°C (32°F)55 mm (2.2 inches)90%moderate
April Weather4°C (39°F)36 mm (1.4 inches)87%moderate
May Weather9°C (48°F)47 mm (1.9 inches)76%moderate
June Weather15°C (60°F)46 mm (1.8 inches)80%high
July Weather18°C (64°F)73 mm (2.9 inches)80%high
August Weather17°C (63°F)86 mm (3.4 inches)83%moderate
September Weather13°C (55°F)71 mm (2.8 inches)87%moderate
October Weather8°C (47°F)110 mm (4.3 inches)90%low
November Weather5°C (41°F)76 mm (3.0 inches)91%low
December Weather1°C (33°F)80 mm (3.1 inches)90%low

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