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December Weather in Istiaia, Greece

Last updated: August 23, 2025

In December, the average temperature in Istiaia, Greece hovers around 12°C (53°F). Expect chilly nights with temperatures dipping to a minimum of 2°C (36°F), while the days can warm up to a pleasant 20°C (68°F). You'll likely experience quite a bit of moisture, with an average precipitation amount of 101 mm (4.0 in) over about 11 days. Don't forget your umbrella, as the average humidity stands at a notable 81%!

December Temperature in Istiaia

In December in Istiaia, the average temperature is 12°C (53°F). The maximum can reach 20°C (68°F), while the minimum can drop to as low as 2°C (36°F). This mild climate makes it an ideal time for travelers to explore the outdoors and enjoy local attractions.

December Weather in Istiaia: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Istiaia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Istiaia, December typically has an average temperature of 12°C (53°F), with highs reaching up to 20°C (68°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec485153586775798074665953
Data source: Temperature data for Istiaia 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.

December Precipitation in Istiaia

In Istiaia in December, the precipitation amount is 101 mm (4.0 in) spread over 11 days.

December Precipitation Trends in Istiaia

The chart displays monthly precipitation patterns in Istiaia, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Istiaia, December typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec105998776382559235610088101
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Istiaia

In Istiaia in December, humidity is 81%. With an average temperature of 12°C (53°F), this humidity feels like a chilly dampness enveloping you, making outdoor activities uncomfortable and requiring layers to stay warm while you explore.

December Average Humidity in Istiaia

This chart illustrates the average monthly humidity levels in Istiaia, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Istiaia is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%78%76%70%71%61%57%51%58%73%79%81%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Istiaia

In Istiaia in December, 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 Istiaia, you can check the information here.

Maximum UV Index Levels in Istiaia for December

The chart shows the monthly maximum UV Index (UVI) for Istiaia in December, 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 December, the maximum UV index in Istiaia typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468101010108643
Data source: Istiaia December 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 December Weather in Istiaia Compares to Other Months

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

This table compares monthly weather conditions in Istiaia, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)105 mm (4.1 inches)82%moderate
February Weather10°C (51°F)99 mm (3.9 inches)78%moderate
March Weather12°C (53°F)87 mm (3.4 inches)76%high
April Weather14°C (58°F)76 mm (3.0 inches)70%very high
May Weather19°C (67°F)38 mm (1.5 inches)71%very high
June Weather24°C (75°F)25 mm (1.0 inches)61%very high
July Weather26°C (80°F)59 mm (2.3 inches)57%very high
August Weather27°C (80°F)23 mm (0.9 inches)51%very high
September Weather24°C (75°F)56 mm (2.2 inches)58%very high
October Weather19°C (66°F)100 mm (3.9 inches)73%high
November Weather15°C (59°F)88 mm (3.5 inches)79%moderate
December Weather12°C (53°F)101 mm (4.0 inches)81%moderate

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