San Isidro weather in September (San José, Costa Rica)
Planning a trip to San Isidro in September? Here's what the weather might have in store during this month.
In September, San Isidro generally has high temperatures and heavy rainfall. Daytime temperatures hover around 24°C, while nights can cool down to about 17°C.
San Isidro in September falls under the rainy season with heavy rainfall, averaging around 655 mm for the month. When we look at the climate data from the last 30 years, we can expect around 23 days of rain.
The area enjoys a balanced 153 hours of sunlight. Ensuring it's neither too overcast nor too sunny.
If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit San Isidro. January, February and March typically offer the most agreeable circumstances. On the other hand, May, June, July, August, September, October and November tend to be characterized by conditions that may not be as optimal.
For an in-depth look at the yearly conditions, visit our specialized San Isidro climate page with graphs.
San Isidro, monthly averages in September
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.
So, what should you wear in this month?
For visitors traveling to San Isidro, 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.
Interested in more climate information?
This site provides you with all the information you need about the climate in San Isidro.
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.