December weather forecast and climate
Istro, Greece

Temperature

The average high-temperature, is 16°C (60.8°F), while the average low-temperature is 10°C (50°F).

Rainfall

In December, the rain falls for 12 days. Throughout December, 123mm (4.8") of precipitation is accumulated. In Istro, during the entire year, the rain falls for 68 days and collects up to 661mm (26") of precipitation.

Sea temperature

In December, the average sea temperature is 18°C (64.4°F). Swimming in 18°C (64.4°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

The month with the shortest days is December, with an average of 9.8h of daylight.

Sunshine

January and December, with an average of 4h of sunshine, are months with the least sunshine.

UV index

January and December, with an average UV index of 2, are months with the lowest UV index.

What is the temperature in December in Istro?

In Istro, in December, the average high-temperature is 16°C (60.8°F), and the average low-temperature is 10°C (50°F).

How much does it rain in Istro in December?

In Istro, in December, during 12 rainfall days, 123mm (4.8") of precipitation is typically accumulated.

How cold is the water in December in Istro?

In December, the average sea temperature in Istro, Greece, is 18°C (64.4°F). Swimming in 18°C (64.4°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

What is the month with the shortest days in Istro?

With an average of 9.8h of daylight, December has the shortest days of the year.

What is the average length of the day in December in Istro?

In December, the average length of the day in Istro, Greece, is 9.8h.

What is the month with the least sunshine in Istro?

Months with the least sunshine are January and December, with an average of 4h of sunshine.

How long on average sun shines in December in Istro?

In Istro, Greece, the average sunshine in December is 4h.

What are the months with the lowest UV index in Istro?

January and December, with an average UV index of 2, are months with the lowest UV index in Istro, Greece.

What is the UV index reading in December in Istro?

The average UV index in December in Istro, Greece, is 2.
Average temperature in December - Istro, Greece
  • Average high temperature in December: 16°C

Warmest months (with the highest average high temperature) are July and August (28°C).
The month with the lowest average high temperature is January (14°C).

  • Average low temperature in December: 10°C

Months with the highest average low temperature are July and August (21°C).
Coldest months (with the lowest average low temperature) are January and February (8°C).

Average rainfall in December - Istro, Greece
  • Average rainfall in December: 123mm

The wettest month (with the highest rainfall) is January (138mm).
The driest month (with the lowest rainfall) is July (1mm).

Average rainfall days in December - Istro, Greece
  • Average rainfall days in December: 12 days

Months with the highest number of rainy days are January and December (12 days).
Months with the lowest number of rainy days are June, July, August and September (1 days).

Average sea temperature in December - Istro, Greece
  • Average sea temperature in December: 18°C

The best month for swimming (with the highest average sea temperature) is August (25°C).
Coldest months (with the lowest average sea temperature) are February and March (15°C).

Average daylight in December / Average sunshine in December - Istro, Greece
  • Average daylight in December: 9.8h

The month with the longest days is June (Average daylight: 14.5h).
The month with shortest days is December (Average daylight: 9.8h).

  • Average sunshine in December: 4h

Months with most sunshine are June, July and August (Average sunshine: 12h).
Months with least sunshine are January and December (Average sunshine: 4).

Average UV index in December - Istro, Greece
  • Average UV index in December: 2

Months with the highest UV index are June and July (UV index 10).
Months with the lowest UV index are January and December (UV index 2).

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