Costa Rica weather in September

Considering a trip to Costa Rica this September and wondering about the expected weather conditions? Find all the crucial information you need right here, addressing your question:

What is the weather like in Costa Rica in September?

September in Costa Rica generally has temperatures that range from warm to very warm, with heavy precipitation.

During the day temperatures vary from warm in Orosí at 23°C to very warm in Santa Cruz at 31°C. At night it cools down to 23°C in Santa Cruz and 15°C in Orosí.

In September, precipitation varies across different areas. From heavy rainfall in Puerto Limón with an average of 244 mm to heavy rainfall in Dominical with 879 mm. The city Jacó usually sees around 159 hours of sunlight, indicating a moderately sunny period.

For a closer look at September's conditions in Costa Rica, see the map below. For a more detailed look at Costa Rica's yearly weather, check out our Costa Rica climate page.

Where to go in Costa Rica in September

Find the average weather conditions in September for the most popular destinations in Costa Rica on the map below. Click on a destination dot for more detailed information.

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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).

Popular destinations in Costa Rica

What is the weather like in September for the 5 most popular destinations in Costa Rica?

Average weather in Jacó

In September Jacó generally has high temperatures with maximum daytime temperatures around 28°C, minimum nighttime temperatures around 24°C and heavy monthly rainfall. So on average the conditions are poor that month.

Jacó
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
28°C 
25°C 
171 hours 
620 mm 
22 days 
poor 
28°C 
24°C 
159 hours 
579 mm 
22 days 
poor 
October   >> October
>>  
28°C 
24°C 
167 hours 
622 mm 
21 days 
poor 
Climate in Jacó

Average weather in San José

In September San José generally has high temperatures with maximum daytime temperatures around 24°C, minimum nighttime temperatures around 16°C and heavy monthly rainfall. So on average the conditions are poor that month.

San José
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
24°C 
17°C 
160 hours 
414 mm 
24 days 
poor 
24°C 
16°C 
149 hours 
476 mm 
24 days 
poor 
October   >> October
>>  
24°C 
16°C 
162 hours 
490 mm 
23 days 
poor 
Climate in San José

Average weather in Tamarindo

In September Tamarindo generally has very high temperatures with maximum daytime temperatures around 30°C, minimum nighttime temperatures around 25°C and heavy monthly rainfall. So on average the conditions are poor that month.

Tamarindo
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
31°C 
25°C 
183 hours 
250 mm 
21 days 
poor 
30°C 
25°C 
158 hours 
331 mm 
23 days 
poor 
October   >> October
>>  
30°C 
25°C 
171 hours 
354 mm 
21 days 
poor 
Climate in Tamarindo

Average weather in Puerto Viejo

In September Puerto Viejo generally has high temperatures with maximum daytime temperatures around 29°C, minimum nighttime temperatures around 24°C and heavy monthly rainfall. So on average the conditions are poor that month.

Puerto Viejo
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
29°C 
24°C 
146 hours 
409 mm 
23 days 
poor 
29°C 
24°C 
156 hours 
309 mm 
22 days 
poor 
October   >> October
>>  
29°C 
24°C 
166 hours 
356 mm 
22 days 
poor 
Climate in Puerto Viejo

Average weather in Fortuna

In September Fortuna generally has high temperatures with maximum daytime temperatures around 29°C, minimum nighttime temperatures around 21°C and heavy monthly rainfall. So on average the conditions are poor that month.

Fortuna
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
28°C 
21°C 
171 hours 
263 mm 
22 days 
poor 
29°C 
21°C 
159 hours 
308 mm 
23 days 
poor 
October   >> October
>>  
28°C 
21°C 
167 hours 
331 mm 
22 days 
poor 
Climate in Fortuna

Is your destination not in the list? Have a look at other destinations in Costa Rica.

Is September the best time to visit Costa Rica?

In our view, September might not be the best time to travel to Costa Rica with often poor weather in Jacó.

Generally speaking, January and February provide perfect weather in Jacó. The weather in May, June, July, August, September, October and November, on the other hand, tends to be poor.

Interested in more climate information?

We have much more information about the climate in Costa Rica. Interested in the weather conditions in a specific month? Select the month below.

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  • Weather and climate has detailed information for every country in the world. Are you going to Costa Rica? Get detailed 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.