San José weather in September (San José, Costa Rica)
Curious about the September weather in San José? Check out this comprehensive weather guide.
In September, San José generally has high temperatures and heavy rainfall. Anticipate daytime temperatures around 24°C, while night temperatures can drop to 16°C.
San José in September falls under the rainy season with heavy rainfall, averaging around 476 mm for the month. Typically around 24 days of rainfall is expected.
The city usually sees around 149 hours of sunlight, indicating a moderately sunny period.
If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit San José. January, February and March typically offer the most optimal weather. In contrast, May, June, July, August, September, October and November tend to have less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized San José climate page with graphs.
San José, monthly averages in September
Min Temperature
16°C
Max Temperature
24°C
Chance of Rain
79%
Precipitation
476 mm
Rainy days
24 days
Humidity
85%
Sunshine
149 hours
Percentage 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.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in this month?
For visitors traveling to San José, 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 José.
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.
