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January Weather in Kastelir, Croatia

Last updated: August 23, 2025

In January, the average temperature in Kastelir, Croatia is a chilly 5°C (42°F). Expect a range that dips to a brisk -6°C (21°F) at its lowest and peaks at a mild 14°C (57°F). During this month, you can anticipate 51 mm (2.0 in) of precipitation spread over approximately 7 days, contributing to an average humidity of 88%.

January Temperature in Kastelir

In January in Kastelir, the average temperature is 5°C (42°F). The maximum can reach 14°C (57°F), while the minimum can drop to as low as -6°C (21°F). Be prepared for chilly weather and pack warm layers for your trip!

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

The chart illustrates January temperature patterns in Kastelir, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kastelir, January typically has an average temperature of 5°C (42°F), with highs reaching up to 14°C (57°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec414548556372757768595245
Data source: Temperature data for Kastelir 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 Kastelir

In Kastelir in January, the precipitation amount is 51 mm (2.0 in) over a period of 7 days.

January Precipitation Trends in Kastelir

The chart displays monthly precipitation patterns in Kastelir, 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 Kastelir, January typically receives around 51 mm (2.0 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec51108648912771586114790148137
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Kastelir

In Kastelir in January humidity is 88%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less appealing and leading you to seek warmth indoors instead.

January Average Humidity in Kastelir

This chart illustrates the average monthly humidity levels in Kastelir, 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 Kastelir is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%82%73%73%70%69%63%51%64%83%89%88%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Kastelir

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

Maximum UV Index Levels in Kastelir for January

The chart shows the monthly maximum UV Index (UVI) for Kastelir 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 Kastelir typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987532
Data source: Kastelir 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 Kastelir Compares to Other Months

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

This table compares monthly weather conditions in Kastelir, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)51 mm (2.0 inches)88%low
February Weather7°C (45°F)108 mm (4.3 inches)82%moderate
March Weather9°C (48°F)64 mm (2.5 inches)73%moderate
April Weather13°C (55°F)89 mm (3.5 inches)73%high
May Weather17°C (63°F)127 mm (5.0 inches)70%very high
June Weather22°C (73°F)71 mm (2.8 inches)69%very high
July Weather24°C (76°F)58 mm (2.3 inches)63%very high
August Weather25°C (77°F)61 mm (2.4 inches)51%very high
September Weather20°C (68°F)147 mm (5.8 inches)64%high
October Weather15°C (60°F)89 mm (3.5 inches)83%moderate
November Weather11°C (52°F)148 mm (5.8 inches)89%moderate
December Weather7°C (45°F)137 mm (5.4 inches)88%low

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