Heredia weather in September (San José, Costa Rica)

How is September weather typically in Heredia? Use this page to get an overview of the month’s weather conditions.

Temperatures

Typically, September in Heredia includes high temperatures and heavy rainfall. Daytime temperatures hover around 25°C, while nights can cool down to about 17°C.

Precipitation

Heredia in September falls under the rainy season with heavy rainfall, averaging around 426 mm for the month. The climate data from previous years indicates that there are typically about 24 days days of rain.

Average sunshine

The month experiences a moderate amount of sunlight, with 149 hours hours. A nice balance between sunshine and clouds.

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 Temperature 17°C  

Max Temperature 25°C  

Chance of Rain 81%  

Precipitation 426 mm  

Rainy days 24 days  

Humidity 85% *  

Sunshine 149 hours *  

Percentage 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 and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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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 this month?

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.

Swimming

7/10

Camping

6/10

Interested in more climate information?

This site 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 travel conditions. Find out where to go with our weather planner.