Alajuela Weather in May

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

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Fortuna Alajuela El Castillo de La Fortuna Bijagua

Are you planning a trip a to Alajuela, Costa Rica in May and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in Alajuela in May

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

Temperatures

The average maximum daytime temperatures vary from warm in Birrí at 26°C (79°F) to very warm in Los Chiles at 32°C (90°F). Nighttime temperatures generally drop to 24°C (75°F) in Los Chiles and 18°C (64°F) in Birrí. These night and day temperatures are average and some days may be even warmer. So be prepared and dress for the heat.

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

Precipitation

In May, precipitation varies across different areas. From heavy rainfall in Playa el Jobo with an average of 177 mm (7 in) to heavy rainfall in San Mateo with 444 mm (17 in).

Average sunshine

May brings good sunshine to many areas. Fortuna sees around 203 hours of sunlight, great for visitors looking for bright days.

Explore Alajuela by month

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

Best Places to Visit in Alajuela in May

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 May for some of the most popular destinations in Alajuela, Costa Rica?

Temperature range in Alajuela (May)

Precipitation variation in Alajuela (May)

Fortuna

In May 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.

« April
May
June »
April
May
June
Max temperature
30°C (86°F)
29°C (84°F)
29°C (84°F)
Min temperature
20°C (68°F)
21°C (70°F)
21°C (70°F)
Monthly sun hours
255 hours
203 hours
156 hours
Monthly rainfall
64 mm (2.5 in)
274 mm (11 in)
330 mm (13 in)
Monthly rainy days
9 days
18 days
23 days
Weather conditions
pleasant
poor
poor
Climate in Fortuna →

Alajuela

In May Alajuela generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 18°C (64°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« April
May
June »
April
May
June
Max temperature
27°C (81°F)
26°C (79°F)
26°C (79°F)
Min temperature
17°C (63°F)
18°C (64°F)
18°C (64°F)
Monthly sun hours
241 hours
183 hours
145 hours
Monthly rainfall
78 mm (3.1 in)
340 mm (13 in)
408 mm (16 in)
Monthly rainy days
10 days
19 days
24 days
Weather conditions
perfect
poor
poor
Climate in Alajuela →

El Castillo de La Fortuna

In May 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.

« April
May
June »
April
May
June
Max temperature
30°C (86°F)
29°C (84°F)
29°C (84°F)
Min temperature
20°C (68°F)
21°C (70°F)
21°C (70°F)
Monthly sun hours
255 hours
203 hours
156 hours
Monthly rainfall
55 mm (2.2 in)
264 mm (10 in)
319 mm (13 in)
Monthly rainy days
9 days
19 days
23 days
Weather conditions
pleasant
poor
poor
Climate in El Castillo de La Fortuna →

Bijagua

In May Bijagua generally has very 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.

« April
May
June »
April
May
June
Max temperature
31°C (88°F)
30°C (86°F)
30°C (86°F)
Min temperature
22°C (72°F)
22°C (72°F)
22°C (72°F)
Monthly sun hours
265 hours
204 hours
167 hours
Monthly rainfall
74 mm (2.9 in)
242 mm (9.5 in)
300 mm (12 in)
Monthly rainy days
9 days
18 days
23 days
Weather conditions
pleasant
poor
poor
Climate in Bijagua →

Atenas

In May Atenas generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 20°C (68°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« April
May
June »
April
May
June
Max temperature
29°C (84°F)
28°C (82°F)
27°C (81°F)
Min temperature
20°C (68°F)
20°C (68°F)
20°C (68°F)
Monthly sun hours
240 hours
183 hours
144 hours
Monthly rainfall
105 mm (4.1 in)
389 mm (15 in)
455 mm (18 in)
Monthly rainy days
10 days
19 days
23 days
Weather conditions
pleasant
poor
poor
Climate in Atenas →

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

In our records: Costa Rica May extremes

Notable May records observed across cities in Costa Rica in our climate database (1994 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • In our records, the warmest May day in Costa Rica reached 40°C (104°F) in Sámara on May 13, 1998.
  • In our records, the coldest May daytime high in Costa Rica was 19°C (66°F) in Puntarenas on May 29, 2008.

Popular cities in May

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

City Weather Day temp Night temp Rainfall
Fortuna 29°C (84°F) 21°C (70°F) 274 mm (11 in)
Alajuela 26°C (79°F) 18°C (64°F) 340 mm (13 in)
El Castillo de La Fortuna 29°C (84°F) 21°C (70°F) 264 mm (10 in)
Bijagua 30°C (86°F) 22°C (72°F) 242 mm (9.5 in)
Atenas 28°C (82°F) 20°C (68°F) 389 mm (15 in)
Grecia 27°C (81°F) 19°C (66°F) 340 mm (13 in)

Alajuela weather in May: frequently asked questions

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

Alajuela, Costa Rica typically experiences poor weather in May, part of the season. Daytime highs in Fortuna average around 29°C (84°F), and temperatures drop to about 21°C (70°F) at night.

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

In Fortuna, the average daytime high in May 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 May?

Expect plenty of rainfall. Fortuna records an average of 274 mm (11 in) in May, putting it among the wetter months for Alajuela, Costa Rica.

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

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

On average, the best time to visit Alajuela, Costa Rica is in February and March with generally perfect weather in Fortuna. 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 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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