Atenas weather in September (Alajuela, Costa Rica)

Thinking of visiting Atenas in September? Check the weather first! See what weather conditions to anticipate this month with our guide.

Temperatures

The month of September in Atenas typically brings high temperatures and heavy rainfall. Daytime temperatures are expected to be around 27°C, cooling off to about 19°C at night.

Precipitation

Atenas in September falls under the rainy season with heavy rainfall, averaging around 482 mm for the month. Based on our climate data of the past 30 years, about 23 days of rain are anticipated.

Average sunshine

The city usually sees around 147 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 Atenas. January, February and March typically offer 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 Atenas climate page with graphs.

 

Atenas, monthly averages in September

Min Temperature 19°C  

Max Temperature 27°C  

Chance of Rain 77%  

Precipitation 482 mm  

Rainy days 23 days  

Humidity 86% *  

Sunshine 147 hours *  

Percentage Sunshine *  

* Data from: Santamaria, Costa Rica (25 KM, 15 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?

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.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Atenas.

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.