Liberia
Costa Rica
Long-term weather forecast
Long-term weather forecast
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September weather forecast and Climate
Liberia, Costa Rica

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  • The average high temperature in September: 31.3°C

The warmest month (with the highest average high temperature) is April (35.9°C).
The month with the lowest average high temperature is October (30.9°C).

  • The average low temperature in September: 22.4°C

The month with the highest average low temperature is May (23.4°C).
The coldest month (with the lowest average low temperature) is January (20.7°C).

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  • The average humidity in September: 85.4%

The month with the highest relative humidity is October (86.1%).
The month with the lowest relative humidity is March (60.5%).

  • The average rainfall in September: 346.3mm

The wettest month (with the highest rainfall) is September (346.3mm).
The driest month (with the lowest rainfall) is January (1.3mm).

  • The average rainfall days in September: 17 days

The month with the highest number of rainy days is September (17 days).
Months with the lowest number of rainy days are January, February and March (0 days).

  • The average daylight in September: 12h

Months with the longest days are May, June and July (Average daylight: 13h).
Months with shortest days are January, February, March, April, August, September, October, November and December (Average daylight: 12h).

  • The average sunshine in September: 5.3h

The month with most sunshine is February (Average sunshine: 9.9h).
The month with least sunshine is September (Average sunshine: 5.3h).

  • The average UV index in September: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 10).

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