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January Weather in Siemien, Poland

Last updated: August 27, 2025

In January, the average temperature in Siemien, Poland hovers around -1°C (30°F). However, prepare for a range, as temperatures can dip to a chilly -24°C (-10°F) and rise to a mild 10°C (50°F). Expect about 40 mm (1.6 in) of precipitation over 10 days, and don't forget your umbrella, as humidity levels remain high at an average of 92%.

January Temperature in Siemien

In January in Siemien, the average temperature is -1°C (30°F). The maximum can reach 10°C (50°F), while the minimum can drop as low as -24°C (-10°F). It's advisable to prepare for chilly weather and pack warm clothing if you're planning to visit during this time.

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

The chart illustrates January temperature patterns in Siemien, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siemien, January typically has an average temperature of -1°C (30°F), with highs reaching up to 10°C (50°F) and lows dropping to around -24°C (-10°F).
JanFebMarAprMayJunJulAugSepOctNovDec303238485768686758504134
Data source: Temperature data for Siemien 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 Siemien

In Siemien in January, the precipitation amount is 40 mm (1.6 in) over a span of 10 days.

January Precipitation Trends in Siemien

The chart displays monthly precipitation patterns in Siemien, 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 Siemien, January typically receives around 40 mm (1.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec4043394773778410175633552
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Siemien

In Siemien 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 Siemien

This chart illustrates the average monthly humidity levels in Siemien, 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 Siemien is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%88%77%62%61%61%60%70%86%90%92%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Siemien

In Siemien 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 Siemien.

Maximum UV Index Levels in Siemien for January

The chart shows the monthly maximum UV Index (UVI) for Siemien 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 Siemien typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578876321
Data source: Siemien 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 Siemien Compares to Other Months

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

This table compares monthly weather conditions in Siemien, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)40 mm (1.6 inches)92%low
February Weather0°C (32°F)43 mm (1.7 inches)89%low
March Weather3°C (38°F)39 mm (1.5 inches)87%moderate
April Weather9°C (48°F)47 mm (1.8 inches)77%moderate
May Weather14°C (57°F)73 mm (2.9 inches)62%high
June Weather20°C (68°F)77 mm (3.0 inches)61%very high
July Weather20°C (68°F)84 mm (3.3 inches)60%very high
August Weather20°C (68°F)101 mm (4.0 inches)60%high
September Weather15°C (59°F)75 mm (3.0 inches)70%high
October Weather10°C (50°F)63 mm (2.5 inches)86%moderate
November Weather5°C (41°F)35 mm (1.4 inches)90%low
December Weather1°C (34°F)52 mm (2.0 inches)92%low

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