Arenal Volcano National Park

Costa Rica Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Costa Rica in September.

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Jacó San José Tamarindo Fortuna

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 to Expect in Costa Rica in September

The weather in Costa Rica in September can be quite varied, with temperatures that range from warm to very warm and heavy precipitation.

Temperatures

During the day temperatures vary from warm in Orosí at 23°C (73°F) to very warm in Santa Cruz at 31°C (88°F). At night it cools down to 23°C (73°F) in Santa Cruz and 15°C (59°F) in Orosí.

To explore the conditions in Costa Rica in more detail, check the map below.

Precipitation

In September, precipitation varies across different areas. From heavy rainfall in Puerto Limón with an average of 244 mm (9.6 in) to heavy rainfall in Dominical with 879 mm (35 in).

Average sunshine

Sunshine levels are moderate in most locations. Jacó typically sees 159 hours of sunlight, creating comfortable conditions that aren't too bright or too dim. Looking for something sunnier? Our weather planner helps you discover destinations with more reliable sunshine.

Explore Costa Rica by month

Pick a month to see the average temperature, rainfall and sunshine in Costa Rica - and find the best time to visit. (based on Jacó)

January29°C (84°F) February29°C (84°F) March30°C (86°F) April29°C (84°F) May29°C (84°F) June29°C (84°F) July28°C (82°F) This monthAugust28°C (82°F) September28°C (82°F) October28°C (82°F) November28°C (82°F) December28°C (82°F)
Best Time to Visit Costa Rica →

Best Places to Visit in Costa Rica in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Costa Rica.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Costa Rica

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

Temperature range in Costa Rica (September)

Precipitation variation in Costa Rica (September)

Jacó

In September Jacó generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 24°C (75°F) and heavy monthly rainfall. So on average the conditions are less favorable that month.

« August
September
October »
August
September
October
Max temperature
28°C (82°F)
28°C (82°F)
28°C (82°F)
Min temperature
25°C (77°F)
24°C (75°F)
24°C (75°F)
Monthly sun hours
171 hours
159 hours
167 hours
Monthly rainfall
620 mm (24 in)
579 mm (23 in)
622 mm (24 in)
Monthly rainy days
22 days
22 days
21 days
Weather conditions
less favorable
less favorable
less favorable
Climate in Jacó →

San José

In September San José generally has high temperatures with maximum daytime temperatures around 24°C (75°F), minimum nighttime temperatures around 16°C (61°F) and heavy monthly rainfall. So on average the conditions are less favorable that month.

« August
September
October »
August
September
October
Max temperature
24°C (75°F)
24°C (75°F)
24°C (75°F)
Min temperature
17°C (63°F)
16°C (61°F)
16°C (61°F)
Monthly sun hours
160 hours
149 hours
162 hours
Monthly rainfall
414 mm (16 in)
476 mm (19 in)
490 mm (19 in)
Monthly rainy days
24 days
24 days
23 days
Weather conditions
less favorable
less favorable
less favorable
Climate in San José →

Tamarindo

In September Tamarindo generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 25°C (77°F) and heavy monthly rainfall. So on average the conditions are less favorable that month.

« August
September
October »
August
September
October
Max temperature
31°C (88°F)
30°C (86°F)
30°C (86°F)
Min temperature
25°C (77°F)
25°C (77°F)
25°C (77°F)
Monthly sun hours
183 hours
158 hours
171 hours
Monthly rainfall
250 mm (9.8 in)
331 mm (13 in)
354 mm (14 in)
Monthly rainy days
21 days
23 days
21 days
Weather conditions
less favorable
less favorable
less favorable
Climate in Tamarindo →

Puerto Viejo de Talamanca

In September Puerto Viejo de Talamanca generally has high temperatures with maximum daytime temperatures around 29°C (84°F), minimum nighttime temperatures around 24°C (75°F) and heavy monthly rainfall. So on average the conditions are less favorable that month.

« August
September
October »
August
September
October
Max temperature
29°C (84°F)
29°C (84°F)
29°C (84°F)
Min temperature
24°C (75°F)
24°C (75°F)
24°C (75°F)
Monthly sun hours
146 hours
156 hours
166 hours
Monthly rainfall
409 mm (16 in)
309 mm (12 in)
356 mm (14 in)
Monthly rainy days
23 days
22 days
22 days
Weather conditions
less favorable
less favorable
less favorable
Climate in Puerto Viejo de Talamanca →

Fortuna

In September Fortuna generally has high temperatures with maximum daytime temperatures around 29°C (84°F), minimum nighttime temperatures around 21°C (70°F) and heavy monthly rainfall. So on average the conditions are less favorable that month.

« August
September
October »
August
September
October
Max temperature
28°C (82°F)
29°C (84°F)
28°C (82°F)
Min temperature
21°C (70°F)
21°C (70°F)
21°C (70°F)
Monthly sun hours
171 hours
159 hours
167 hours
Monthly rainfall
263 mm (10 in)
308 mm (12 in)
331 mm (13 in)
Monthly rainy days
22 days
23 days
22 days
Weather conditions
less favorable
less favorable
less favorable
Climate in Fortuna →

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

Popular cities in September

Day & night temperatures, rainfall and average weather in Costa Rica in September.

City Weather Day temp Night temp Rainfall
Jacó 28°C (82°F) 24°C (75°F) 579 mm (23 in)
San José 24°C (75°F) 16°C (61°F) 476 mm (19 in)
Tamarindo 30°C (86°F) 25°C (77°F) 331 mm (13 in)
Fortuna 29°C (84°F) 21°C (70°F) 308 mm (12 in)
Santa Teresa 29°C (84°F) 25°C (77°F) 375 mm (15 in)
Uvita 26°C (79°F) 22°C (72°F) 836 mm (33 in)

Costa Rica weather in September: frequently asked questions

What is the weather like in Costa Rica in September?

September in Costa Rica brings less favorable weather. In Jacó, daytime temperatures are typically around 28°C (82°F) and nighttime lows hover near 24°C (75°F).

What is the average temperature in Costa Rica in September?

Jacó averages a daytime maximum of 28°C (82°F) in September, with overnight lows close to 24°C (75°F).

Does Costa Rica get a lot of rain in September?

Yes. September brings heavy rainfall to Costa Rica, with Jacó averaging around 579 mm (23 in). Expect frequent showers and pack accordingly.

Is September a Good Time to Visit Costa Rica?

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

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

Interested in more climate information?

We have much more information about the climate in Costa Rica.

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

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