When is the best time to go to San Juan
The chart above shows the best time of year to visit San Juan, Costa Rica. These are based on an analysis of weather averages such as temperature, rainfall and number of hours of sunshine. These ratings are based solely on the climate and do not take into account other factors such as accommodation prices and how busy it is likely to be.
Average temperatures in San Juan
San Juan weather by month
Please note our recommendations for when to visit San Juan are based solely on the weather and do not take into accounts accommodation prices, how busy it will be and what events are on.
January
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 22°C | 19mm | 7.3hrs | 12.4hrs |
Warm, humid and dry weather often prevails in San Juan during the month of January
It is perhaps the perfect month to visit San Juan, with some inordinately good weather at this time of year.
January is in the winter in San Juan and is typically the coldest month of the year. Daytime maximum temperatures average around a muggy 24°C (76°F), whilst at night 16°C (61°F) is normal.
On average January is the driest month of the year in San Juan with around 19mm 0.8 inches of rain making it a dry time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.3 hours of sunshine per day.
February
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 15mm | 7.7hrs | 12.5hrs |
February in San Juan is generally dry with the temperature being warm.
It is perhaps the perfect month to visit San Juan, with some extremely good weather at this time of year.
February is in the winter in San Juan and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a muggy 25°C (77°F), whilst at night 16°C (61°F) is normal.
On average February is the 2nd driest month of the year in San Juan with around 15mm 0.6 inches of rain making it a dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.7 hours of sunshine per day.
San Juan weather in February »
March
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 32mm | 7.8hrs | 12.8hrs |
The weather in March in San Juan is characteristically warm, humid and reasonably dry.
It is perhaps the perfect month to visit San Juan, with some inordinately good weather at this time of year.
March is in the spring in San Juan and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a muggy 26°C (79°F), whilst at night 17°C (62°F) is normal.
On average March is the 3rd driest month of the year in San Juan with around 32mm 1.2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.8 hours of sunshine per day.
April
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 24°C | 109mm | 7.7hrs | 13.1hrs |
San Juan's weather in April is typically warm, humid and damp in nature.
Although outside the main holiday season, there is still plenty of reasonably acceptable weather around this time of year. This makes it an okay time to visit San Juan.
April is in the spring in San Juan and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a muggy 27°C (80°F), whilst at night 18°C (64°F) is normal.
On average April is the 4th driest month of the year in San Juan with around 109mm 4.3 inches of rain making it a damp time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.7 hours of sunshine per day.
May
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 391mm | 7hrs | 13.3hrs |
May is a very wet, humid month in San Juan and the temperature is generally warm.
Based on weather alone, this is probably a time of year to avoid going to San Juan for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
May is in the spring in San Juan and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a muggy 26°C (79°F), whilst at night 18°C (64°F) is normal.
On average May is the 5th driest month of the year in San Juan with around 391mm 15.4 inches of rain making it a very wet time to visit. This rainfall is typically spread over 19 days, although this may vary considerably.
On the flip side this corresponds to an average of 7 hours of sunshine per day.
June
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 400mm | 6.8hrs | 12.4hrs |
The climate in San Juan during June can be summarized as warm, humid and very wet.
Based on weather alone, this is probably a time of year to avoid going to San Juan for your holidays. The weather is often not a good and not conducive to spending time outdoors.
June is in the summer in San Juan and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a muggy 25°C (78°F), whilst at night 18°C (64°F) is normal.
On average June is the 6th driest month of the year in San Juan with around 400mm 15.7 inches of rain making it a very wet time to visit. This rainfall is typically spread over 24 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.8 hours of sunshine per day.
July
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 283mm | 6.7hrs | 12.5hrs |
July in San Juan is generally very wet with the temperature being warm.
Based on weather alone, this is probably a time of year to avoid going to San Juan for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
July is in the summer in San Juan and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a muggy 25°C (77°F), whilst at night 18°C (64°F) is normal.
On average July is the 6th wettest month of the year in San Juan with around 283mm 11.1 inches of rain making it a very wet time to visit. This rainfall is typically spread over 23 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.7 hours of sunshine per day.
August
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 386mm | 6.5hrs | 12.8hrs |
The weather in August in San Juan is characteristically warm, humid and very wet.
Based on weather alone, this is probably a time of year to avoid going to San Juan for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
August is in the summer in San Juan and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a muggy 25°C (77°F), whilst at night 18°C (64°F) is normal.
On average August is the 5th wettest month of the year in San Juan with around 386mm 15.2 inches of rain making it a very wet time to visit. This rainfall is typically spread over 23 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.5 hours of sunshine per day.
September
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 498mm | 6.2hrs | 13.1hrs |
San Juan's weather in September is typically warm, humid and very wet in nature.
Based on weather alone, this is probably a time of year to avoid going to San Juan for your holidays. The weather is often not a good and not conducive to spending time outdoors.
September is in the fall / autumn in San Juan and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 25°C (77°F), whilst at night 18°C (64°F) is normal.
On average September is the 4th wettest month of the year in San Juan with around 498mm 19.6 inches of rain making it a very wet time to visit. This rainfall is typically spread over 24 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.2 hours of sunshine per day.
San Juan weather in September »
October
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 489mm | 6.1hrs | 13.3hrs |
October is a very wet, humid month in San Juan and the temperature is generally warm.
Based on weather alone, this is probably a time of year to avoid going to San Juan for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
October is in the fall / autumn in San Juan and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a muggy 25°C (77°F), whilst at night 17°C (63°F) is normal.
On average October is the 3rd wettest month of the year in San Juan with around 489mm 19.2 inches of rain making it a very wet time to visit. This rainfall is typically spread over 23 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.1 hours of sunshine per day.
November
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 22°C | 221mm | 6.4hrs | 12.4hrs |
Warm, humid and very wet weather often prevails in San Juan during the month of November
Based on weather alone, this is probably a time of year to avoid going to San Juan for your holidays. The weather is often not a good and not conducive to spending time outdoors.
November is in the fall / autumn in San Juan and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 25°C (77°F), whilst at night 17°C (63°F) is normal.
On average November is the 2nd wettest month of the year in San Juan with around 221mm 8.7 inches of rain making it a very wet time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.4 hours of sunshine per day.
San Juan weather in November »
December
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 22°C | 61mm | 6.9hrs | 12.5hrs |
December in San Juan is generally reasonably dry with the temperature being warm.
Although outside the main holiday season, there is still plenty of fairly acceptable weather around this time of year. This makes it an okay time to visit San Juan.
December is in the winter in San Juan and is typically the warmest month of the year. Daytime maximum temperatures average around a muggy 24°C (76°F), whilst at night 17°C (62°F) is normal.
On average December is the wettest month of the year in San Juan with around 61mm 2.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.9 hours of sunshine per day.
Other monthly averages
San Juan weather stats
| Hottest month: | April | 26.4°C 79.5°F |
|---|---|---|
| Driest month: | February | 15mm 0.6ins |
| Sunniest month: | February | 7.7hrs |
| Coldest month: | January | 24.1°C 75.4°F |
| Wettest month: | September | 498mm 19.6ins |
| Warmest sea: | May | 29°C 84.2°F |
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