April weather forecast and climate
Istro, Greece

April, the same as March, is another comfortable spring month in Istro, Greece, with average temperature varying between 11°C (51.8°F) and 19°C (66.2°F).

Temperature

In April, the average high-temperature is 19°C (66.2°F), and the average low-temperature is 11°C (51.8°F).

Rainfall

In Istro, during April, the rain falls for 5 days and regularly aggregates up to 36mm (1.4") of precipitation. Throughout the year, there are 68 rainfall days, and 661mm (26") of precipitation is accumulated.

Sea temperature

In April, the average sea temperature in Istro is 16°C (60.8°F). For swimming, a surface water temperature of 16°C (60.8°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

In Istro, the average length of the day in April is 13.1h.

Sunshine

In April, the average sunshine in Istro is 8h.

UV index

In Istro, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation for the ordinary person.
The daily maximum UV index of 7 in April interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in April in Istro?

In April, in Istro, Greece, the average high-temperature is 19°C (66.2°F), and the average low-temperature is 11°C (51.8°F).

How much does it rain in Istro in April?

In April, the rain falls for 5 days. Throughout April, 36mm (1.4") of precipitation is accumulated.

What is the sea water temperature in April in Istro?

In Istro, Greece, the average seawater temperature in April is 16°C (60.8°F). For swimming, a surface water temperature of 16°C (60.8°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

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

The average length of the day in April in Istro is 13.1h.

How long on average sun shines in April in Istro?

In Istro, the average sunshine in April is 8h.

What is the UV index intensity in April in Istro?

In Istro, Greece, the average daily maximum UV index in April is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in April - Istro, Greece
  • Average high temperature in April: 19°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 April: 11°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 April - Istro, Greece
  • Average rainfall in April: 36mm

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

Average rainfall days in April - Istro, Greece
  • Average rainfall days in April: 5 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 April - Istro, Greece
  • Average sea temperature in April: 16°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 April / Average sunshine in April - Istro, Greece
  • Average daylight in April: 13.1h

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 April: 8h

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 April - Istro, Greece
  • Average UV index in April: 7

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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