Alonnisos
Greece
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Alonnisos, Greece

  • Average high temperature in September: 25°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 (10°C).

  • Average low temperature in September: 16°C

Months with the highest average low temperature are July and August (19°C).
The coldest month (with the lowest average low temperature) is January (4°C).

  • Average rainfall in September: 46mm

The wettest month (with the highest rainfall) is December (119mm).
The driest month (with the lowest rainfall) is July (22mm).

  • Average rainfall days in September: 3 days

The month with the highest number of rainy days is December (10 days).
Months with the lowest number of rainy days are July, August and September (3 days).

  • Average sea temperature in September: 23°C

Best months for swimming (with the highest average sea temperature) are July and August (24°C).
Coldest months (with the lowest average sea temperature) are January, February and March (14°C).

  • Average daylight in September: 12h

Months with the longest days are June and July (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9h).

  • Average sunshine in September: 10h

The month with most sunshine is July (Average sunshine: 13h).
Months with least sunshine are January and December (Average sunshine: 4).

  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).

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