Olhão
Portugal
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Olhão, Portugal

  • Average high temperature in September: 27°C

The warmest month (with the highest average high temperature) is August (29°C).
The month with the lowest average high temperature is January (15°C).

  • Average low temperature in September: 17°C

The month with the highest average low temperature is July (18°C).
The coldest month (with the lowest average low temperature) is January (7°C).

  • Average rainfall in September: 16mm

The wettest month (with the highest rainfall) is December (100mm).
The driest month (with the lowest rainfall) is July (2mm).

  • Average rainfall days in September: 2 days

The month with the highest number of rainy days is December (12 days).
Months with the lowest number of rainy days are July and August (1 days).

  • Average sea temperature in September: 21.6°C

The best month for swimming (with the highest average sea temperature) is August (22.1°C).
The coldest month (with the lowest average sea temperature) is March (15.9°C).

  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in September: 9h

The month with most sunshine is July (Average sunshine: 12h).
Months with least sunshine are January and December (Average sunshine: 5).

  • Average UV index in September: 7

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

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