Alajuela Weather in September

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

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Fortuna Alajuela El Castillo de La Fortuna Bijagua

Planning a trip to Alajuela, Costa Rica this September? Here's what you need to know about the weather:

What to Expect in Alajuela in September

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

Temperatures

During the day temperatures vary from warm in Birrí at 25°C (77°F) to very warm in Los Chiles at 31°C (88°F). At night it cools down to 23°C (73°F) in Los Chiles and 17°C (63°F) in Birrí.

For a closer look at conditions across Alajuela, Costa Rica, refer to the map below.

Precipitation

In September, precipitation varies across different areas. From heavy rainfall in Playa el Jobo with an average of 262 mm (10 in) to heavy rainfall in San Mateo with 522 mm (21 in).

Average sunshine

Sunshine levels are moderate in most locations. Fortuna 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 Alajuela by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Best Places to Visit in Alajuela in September

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

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 Alajuela

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

Temperature range in Alajuela (September)

Precipitation variation in Alajuela (September)

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 poor 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
poor
poor
poor
Climate in Fortuna →

Alajuela

In September Alajuela generally has high temperatures with maximum daytime temperatures around 25°C (77°F), minimum nighttime temperatures around 17°C (63°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« August
September
October »
August
September
October
Max temperature
26°C (79°F)
25°C (77°F)
25°C (77°F)
Min temperature
17°C (63°F)
17°C (63°F)
17°C (63°F)
Monthly sun hours
160 hours
149 hours
162 hours
Monthly rainfall
353 mm (14 in)
433 mm (17 in)
442 mm (17 in)
Monthly rainy days
24 days
24 days
23 days
Weather conditions
poor
poor
poor
Climate in Alajuela →

El Castillo de La Fortuna

In September El Castillo de La 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 poor 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
254 mm (10 in)
320 mm (13 in)
336 mm (13 in)
Monthly rainy days
23 days
24 days
23 days
Weather conditions
unpleasant
poor
poor
Climate in El Castillo de La Fortuna →

Bijagua

In September Bijagua generally has high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 22°C (72°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« August
September
October »
August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
29°C (84°F)
Min temperature
22°C (72°F)
22°C (72°F)
22°C (72°F)
Monthly sun hours
183 hours
158 hours
171 hours
Monthly rainfall
250 mm (9.8 in)
298 mm (12 in)
314 mm (12 in)
Monthly rainy days
22 days
24 days
22 days
Weather conditions
poor
poor
poor
Climate in Bijagua →

Atenas

In September Atenas generally has high temperatures with maximum daytime temperatures around 27°C (81°F), minimum nighttime temperatures around 19°C (66°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« August
September
October »
August
September
October
Max temperature
27°C (81°F)
27°C (81°F)
26°C (79°F)
Min temperature
19°C (66°F)
19°C (66°F)
19°C (66°F)
Monthly sun hours
158 hours
147 hours
161 hours
Monthly rainfall
420 mm (17 in)
482 mm (19 in)
497 mm (20 in)
Monthly rainy days
23 days
23 days
22 days
Weather conditions
poor
poor
poor
Climate in Atenas →

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

Popular cities in September

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

City Weather Day temp Night temp Rainfall
Fortuna 29°C (84°F) 21°C (70°F) 308 mm (12 in)
Alajuela 25°C (77°F) 17°C (63°F) 433 mm (17 in)
El Castillo de La Fortuna 29°C (84°F) 21°C (70°F) 320 mm (13 in)
Bijagua 30°C (86°F) 22°C (72°F) 298 mm (12 in)
Atenas 27°C (81°F) 19°C (66°F) 482 mm (19 in)
Grecia 26°C (79°F) 18°C (64°F) 412 mm (16 in)

Alajuela weather in September: frequently asked questions

What is the weather like in Alajuela, Costa Rica in September?

Expect poor weather across Alajuela, Costa Rica in September. The popular destination of Fortuna averages 29°C (84°F) by day and 21°C (70°F) at night during this month.

What is the average temperature in Alajuela, Costa Rica in September?

In Fortuna, the average daytime high in September is 29°C (84°F), while nighttime temperatures drop to around 21°C (70°F).

Does Alajuela, Costa Rica get a lot of rain in September?

Expect plenty of rainfall. Fortuna records an average of 308 mm (12 in) in September, putting it among the wetter months for Alajuela, Costa Rica.

Is September a Good Time to Visit Alajuela, Costa Rica?

Given the typically poor weather conditions in Fortuna, September may not be the ideal time to visit Alajuela, Costa Rica.

On average, the best time to visit Alajuela, Costa Rica is in February and March with generally perfect weather in Fortuna. On the other hand, the weather in May, June, July, August, September, October and November tend to be poor.

Interested in more climate information?

We have much more information about the climate in Alajuela.

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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