Cayo Guillermo
Long-term weather forecast
Long-term weather forecast

September weather forecast and Climate
Cayo Guillermo, Cuba

  • The average high temperature in September: 32°C

Warmest months (with the highest average high temperature) are July and August (33°C).
The month with the lowest average high temperature is January (27°C).

  • The average low temperature in September: 22°C

Months with the highest average low temperature are June, July and August (23°C).
Coldest months (with the lowest average low temperature) are January and February (17°C).

  • The average rainfall in September: 160mm

The wettest month (with the highest rainfall) is October (182mm).
The driest month (with the lowest rainfall) is December (39mm).

  • The average rainfall days in September: 15 days

The month with the highest number of rainy days is October (16 days).
Months with the lowest number of rainy days are February and April (5 days).

  • The average sea temperature in September: 29°C

Best months for swimming (with the highest average sea temperature) are June, July, August, September and October (29°C).
Coldest months (with the lowest average sea temperature) are January, February and March (25°C).

  • The average daylight in September: 12h

Months with the longest days are April, May, June, July and August (Average daylight: 13h).
Months with shortest days are January, February, November and December (Average daylight: 11h).

  • The average sunshine in September: 7h

The month with most sunshine is April (Average sunshine: 9h).
Months with least sunshine are January, February, June, September, October, November and December (Average sunshine: 7).

  • The average UV index in September: 11

Months with the highest UV index are April, May, June, July and August (UV index 12).
The month with the lowest UV index is December (UV index 6).