December Weather in Isthmia, Greece

Last updated: August 23, 2025

In Isthmia, Greece, the average temperature in December hovers around 11°C (53°F). Expect a minimum of 4°C (39°F) and a maximum of 19°C (66°F). This month also brings 61 mm (2.4 in) of precipitation over approximately 9 days, contributing to an average humidity level of 76%.

December Temperature in Isthmia

In December in Isthmia, the average temperature is 11°C (53°F). The maximum can reach 19°C (66°F), and the minimum can be as low as 4°C (39°F). It's a pleasant time for traveling, so pack accordingly for mild weather!

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

The chart illustrates December temperature patterns in Isthmia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Isthmia, December typically has an average temperature of 11°C (53°F), with highs reaching up to 19°C (66°F) and lows dropping to around 4°C (39°F).

Data source: Temperature data for Isthmia generated using information from the Copernicus Climate Change Service.

December Precipitation in Isthmia

In Isthmia in December, the precipitation amount is 61 mm (2.4 in) spread over 9 days.

December Precipitation Trends in Isthmia

The chart displays monthly precipitation patterns in Isthmia, 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 Isthmia, December typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Isthmia

In Isthmia in December, humidity is 76%. With an average temperature of 11°C (53°F), this humidity feels like a brisk chill that can make outdoor excursions slightly uncomfortable, as the dampness in the air clings to your skin, making layered clothing essential for any travelers venturing out.

December Average Humidity in Isthmia

This chart illustrates the average monthly humidity levels in Isthmia, 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 Isthmia is approximately 76%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Isthmia

In Isthmia 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 Isthmia, you can check the information here.

Maximum UV Index Levels in Isthmia for December

The chart shows the monthly maximum UV Index (UVI) for Isthmia 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 Isthmia typically reaches 3, which falls under the moderate exposure category.

Data source: Isthmia 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 Isthmia Compares to Other Months

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

This table compares monthly weather conditions in Isthmia, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	61 mm (2.4 inches)	76%	moderate
February Weather	10°C (51°F)	58 mm (2.3 inches)	75%	moderate
March Weather	11°C (53°F)	49 mm (1.9 inches)	74%	high
April Weather	15°C (58°F)	40 mm (1.6 inches)	75%	very high
May Weather	19°C (67°F)	22 mm (0.9 inches)	77%	very high
June Weather	23°C (74°F)	21 mm (0.8 inches)	71%	extreme
July Weather	27°C (80°F)	5 mm (0.2 inches)	68%	very high
August Weather	27°C (81°F)	4 mm (0.2 inches)	63%	very high
September Weather	24°C (75°F)	29 mm (1.2 inches)	65%	very high
October Weather	19°C (66°F)	42 mm (1.6 inches)	72%	high
November Weather	15°C (59°F)	50 mm (2.0 inches)	75%	moderate
December Weather	11°C (53°F)	61 mm (2.4 inches)	76%	moderate