Heredia weather in September (San José, Costa Rica)

How is the weather in Heredia in September? Wondering if it's the right time to visit? Browse this page for a comprehensive overview of the weather conditions for that month.

In September, Heredia typically experiences high temperatures and heavy rainfall. Daytime temperatures hover around 25°C, while nights can cool down to about 17°C.

Heredia in September falls under the rainy season with heavy rainfall, averaging around 426 mm for the month. Based on our climate data of the past 30 years, about 24 days of rain are anticipated.

The city usually sees around 149 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 Heredia. January, February, March and April generally stand out with the best circumstances. While May, June, July, August, September, October and November tend to showcase less optimal conditions.

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

 

Heredia, monthly averages in September

Min TemperatureMin Temperature 17°C  
Max TemperatureMax Temperature 25°C  
Chance of RainChance of Rain 81%  
PrecipitationPrecipitation 426 mm  
Rainy daysRainy days 24 days  
HumidityHumidity 85% *  
SunshineSunshine 149 hours *  
Percentage SunshinePercentage Sunshine *  
* Data from: San José, Costa Rica (8 KM, 5 Miles).

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 Heredia in September?

For visitors traveling to Heredia, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

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

Swimming
7/10
Camping
6/10

Interested in more climate information?

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

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.