Costa Rica climate guide

Temperature in Costa Rica (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
23°C maximum daytime temperature in January in Costa Rica (San Jose)23
24°C maximum daytime temperature in February in Costa Rica (San Jose)24
25°C maximum daytime temperature in March in Costa Rica (San Jose)25
25°C maximum daytime temperature in April in Costa Rica (San Jose)25
25°C maximum daytime temperature in May in Costa Rica (San Jose)25
25°C maximum daytime temperature in June in Costa Rica (San Jose)25
24°C maximum daytime temperature in July in Costa Rica (San Jose)24
24°C maximum daytime temperature in August in Costa Rica (San Jose)24
24°C maximum daytime temperature in September in Costa Rica (San Jose)24
24°C maximum daytime temperature in October in Costa Rica (San Jose)24
24°C maximum daytime temperature in November in Costa Rica (San Jose)24
23°C maximum daytime temperature in December in Costa Rica (San Jose)23
Min temperature (night-time)
15°C minimum night-time temperature in January in Costa Rica (San Jose)15
15°C minimum night-time temperature in February in Costa Rica (San Jose)15
16°C minimum night-time temperature in March in Costa Rica (San Jose)16
16°C minimum night-time temperature in April in Costa Rica (San Jose)16
17°C minimum night-time temperature in May in Costa Rica (San Jose)17
17°C minimum night-time temperature in June in Costa Rica (San Jose)17
17°C minimum night-time temperature in July in Costa Rica (San Jose)17
17°C minimum night-time temperature in August in Costa Rica (San Jose)17
17°C minimum night-time temperature in September in Costa Rica (San Jose)17
17°C minimum night-time temperature in October in Costa Rica (San Jose)17
16°C minimum night-time temperature in November in Costa Rica (San Jose)16
16°C minimum night-time temperature in December in Costa Rica (San Jose)16

Sunshine & Daylight in Costa Rica

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
12 hours of daylight per day in January in Costa Rica (San Jose)12
12 hours of daylight per day in February in Costa Rica (San Jose)12
12 hours of daylight per day in March in Costa Rica (San Jose)12
12 hours of daylight per day in April in Costa Rica (San Jose)12
13 hours of daylight per day in May in Costa Rica (San Jose)13
13 hours of daylight per day in June in Costa Rica (San Jose)13
13 hours of daylight per day in July in Costa Rica (San Jose)13
12 hours of daylight per day in August in Costa Rica (San Jose)12
12 hours of daylight per day in September in Costa Rica (San Jose)12
12 hours of daylight per day in October in Costa Rica (San Jose)12
12 hours of daylight per day in November in Costa Rica (San Jose)12
12 hours of daylight per day in December in Costa Rica (San Jose)12

Rainfall in Costa Rica

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
12 days with some rainfall in January in Costa Rica (San Jose)12
9 days with some rainfall in February in Costa Rica (San Jose)9
8 days with some rainfall in March in Costa Rica (San Jose)8
10 days with some rainfall in April in Costa Rica (San Jose)10
19 days with some rainfall in May in Costa Rica (San Jose)19
24 days with some rainfall in June in Costa Rica (San Jose)24
23 days with some rainfall in July in Costa Rica (San Jose)23
24 days with some rainfall in August in Costa Rica (San Jose)24
24 days with some rainfall in September in Costa Rica (San Jose)24
23 days with some rainfall in October in Costa Rica (San Jose)23
18 days with some rainfall in November in Costa Rica (San Jose)18
16 days with some rainfall in December in Costa Rica (San Jose)16
Average monthly rainfall (mm)
6 mm monthly rainfall in January in Costa Rica (San Jose)6
7 mm monthly rainfall in February in Costa Rica (San Jose)7
9 mm monthly rainfall in March in Costa Rica (San Jose)9
56 mm monthly rainfall in April in Costa Rica (San Jose)56
261 mm monthly rainfall in May in Costa Rica (San Jose)261
296 mm monthly rainfall in June in Costa Rica (San Jose)296
205 mm monthly rainfall in July in Costa Rica (San Jose)205
282 mm monthly rainfall in August in Costa Rica (San Jose)282
372 mm monthly rainfall in September in Costa Rica (San Jose)372
343 mm monthly rainfall in October in Costa Rica (San Jose)343
155 mm monthly rainfall in November in Costa Rica (San Jose)155
36 mm monthly rainfall in December in Costa Rica (San Jose)36

More climate for Costa Rica

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 11 (Extreme) in January in Costa Rica (San Jose)11
UV (maximum) index 11+ (Extreme) in February in Costa Rica (San Jose)11
UV (maximum) index 11+ (Extreme) in March in Costa Rica (San Jose)11
UV (maximum) index 11+ (Extreme) in April in Costa Rica (San Jose)11
UV (maximum) index 11+ (Extreme) in May in Costa Rica (San Jose)11
UV (maximum) index 11+ (Extreme) in June in Costa Rica (San Jose)11
UV (maximum) index 11+ (Extreme) in July in Costa Rica (San Jose)11
UV (maximum) index 11+ (Extreme) in August in Costa Rica (San Jose)11
UV (maximum) index 11+ (Extreme) in September in Costa Rica (San Jose)11
UV (maximum) index 11+ (Extreme) in October in Costa Rica (San Jose)11
UV (maximum) index 11 (Extreme) in November in Costa Rica (San Jose)11
UV (maximum) index 10 (Very High) in December in Costa Rica (San Jose)10
Heat & Humidity
No heat & humidity in January in Costa Rica (San Jose)0
Low heat & humidity in February in Costa Rica (San Jose)L
Low heat & humidity in March in Costa Rica (San Jose)L
Low heat & humidity in April in Costa Rica (San Jose)L
Low heat & humidity in May in Costa Rica (San Jose)L
Low heat & humidity in June in Costa Rica (San Jose)L
Low heat & humidity in July in Costa Rica (San Jose)L
Low heat & humidity in August in Costa Rica (San Jose)L
Low heat & humidity in September in Costa Rica (San Jose)L
Low heat & humidity in October in Costa Rica (San Jose)L
No heat & humidity in November in Costa Rica (San Jose)0
No heat & humidity in December in Costa Rica (San Jose)0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

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

The climate guide for Costa Rica, represented by San Jose, shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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Metric (°C / mm)  |  Imperial (°F / inches)

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Costa Rica climate overview

Costa Rica lies in Central America and has both Caribbean and Pacific coastlines. Spanish architecture and language is all that remains from its colonial past. Today, the economy relies on light industry and agricultural exports, with coffee and bananas the main cash crops.

Running down the spine of the country is a series of volcanic mountain chains forming a high-altitude plateau. A few hissing volcanoes are still active as well as boiling mud pools, craters, and sulphur springs. Fertile volcanic soils support several types of forest, with lush tropical rainforest dominating.

The climate on the plateau is tropical and very wet for most of the year, although a brief drier winter period runs from December to April. Due to the altitude, temperatures are comfortable in the winter and warm, rather than hot, in the summer.

Eastward from the central mountains, a lowland plain runs down to the Caribbean Sea. Costa Rica's east coast has beautiful white sandy beaches but also miles of mangroves. The tropical climate produces rainfall in all months, and as a result, the eastern half of the country is also fairly cloudy. A combination of hot summer temperatures and high coastal humidity, make for oppressive conditions at times.

Extensive savannahs dominate the Pacific coastal plain. A huge national park in the north is home to a vast area of tropical rainforest, along with deciduous and non-deciduous forests, while the coastline itself is rugged. A well-defined sunny and dry winter spell runs from December to April, followed by a wet, hot and humid summer season.

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