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Liberia weather in September (Guanacaste, Costa Rica)

Planning a trip to Liberia in September? This guide provides all the details you need.

In September, Liberia generally has very high temperatures and heavy rainfall. Anticipate daytime temperatures around 31°C, while night temperatures can drop to 22°C.

Keep in mind that while these are the average temperatures, there can be days that are even hotter. It's essential to be prepared for such heat. Wearing light, breathable fabrics and protecting yourself from the sun's intensity with hats or shades can make a difference. Hydration is key, so remember to drink plenty of water, especially if you find yourself outdoors for extended periods.

Liberia in September falls under the rainy season with heavy rainfall, averaging around 340 mm for the month. Typically around 23 days of rainfall is expected.

The city usually sees around 158 hours of sunlight, indicating a moderately sunny period.

If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Liberia. January, February, March and December typically offer the best circumstances. While May, June, August, September and October tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Liberia climate page with graphs.

 

Liberia, monthly averages in September

Min TemperatureMin Temperature 22°C  
Max TemperatureMax Temperature 31°C  
Chance of RainChance of Rain 78%  
PrecipitationPrecipitation 340 mm  
Rainy daysRainy days 23 days  
HumidityHumidity 86%  
SunshineSunshine 158 hours  
Percentage SunshinePercentage Sunshine  

Where to go in Costa Rica in September

Find out more about the weather in Costa Rica in September and which places have the best weather conditions in this month.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Liberia in September?

It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool. However, there's a good chance of rain, so bring a raincoat just in case.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Swimming
7/10
Cycling
7/10
Walking
7/10
Camping
6/10
Outdoor sports
7/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Liberia.

Our site offers climate and forecast data for every country in the world. Are you going to Costa Rica? On this website you can find historical weather averages for many cities in Costa Rica. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.