When is the best time to go to San Isidro
The chart above shows the best time of year to visit San Isidro, 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 Isidro
San Isidro weather by month
Please note our recommendations for when to visit San Isidro 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 |
|---|---|---|---|
| 21°C | 45mm | 7.2hrs | 12.4hrs |
The climate in San Isidro during January can be summarized as warm and reasonably dry.
It is perhaps the perfect month to visit San Isidro, with some extremely good weather at this time of year.
January is in the winter in San Isidro and is typically the coldest month of the year. Daytime maximum temperatures average around 24°C (75°F), whilst at night 16°C (61°F) is normal.
On average January is the driest month of the year in San Isidro with around 45mm 1.8 inches of rain making it a reasonably 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 7.2 hours of sunshine per day.
San Isidro weather in January »
February
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 22°C | 58mm | 7.4hrs | 12.6hrs |
February in San Isidro is generally reasonably dry with the temperature being warm.
It is perhaps the perfect month to visit San Isidro, with some particularly good weather at this time of year.
February is in the winter in San Isidro and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around 24°C (76°F), whilst at night 16°C (60°F) is normal.
On average February is the 2nd driest month of the year in San Isidro with around 58mm 2.3 inches of rain making it a reasonably 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 7.4 hours of sunshine per day.
San Isidro weather in February »
March
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 80mm | 7.7hrs | 12.8hrs |
The weather in March in San Isidro is characteristically warm, humid and a little damp.
It is perhaps a good month to visit San Isidro, with some particularly good weather at this time of year.
March is in the spring in San Isidro and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a muggy 25°C (77°F), whilst at night 16°C (62°F) is normal.
On average March is the 3rd driest month of the year in San Isidro with around 80mm 3.1 inches of rain making it a a little damp 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 7.7 hours of sunshine per day.
April
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 200mm | 7.4hrs | 13hrs |
San Isidro's weather in April is typically warm, humid and very wet in nature.
Although outside the main holiday season, there is still plenty of relatively acceptable weather around this time of year. This makes it an okay time to visit San Isidro.
April is in the spring in San Isidro and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a muggy 25°C (78°F), whilst at night 17°C (62°F) is normal.
On average April is the 4th driest month of the year in San Isidro with around 200mm 7.9 inches of rain making it a very wet 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 7.4 hours of sunshine per day.
May
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 456mm | 6.8hrs | 13.3hrs |
May is a very wet, humid month in San Isidro and the temperature is generally warm.
Based on weather alone, this is probably a time of year to avoid going to San Isidro for your holidays. The weather is often not a good and not conducive to spending time outdoors.
May is in the spring in San Isidro and is typically the 5th coldest 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 May is the 5th driest month of the year in San Isidro with around 456mm 17.9 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 6.8 hours of sunshine per day.
June
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 22°C | 419mm | 6.7hrs | 12.4hrs |
Warm, humid and very wet weather often prevails in San Isidro during the month of June
Based on weather alone, this is probably a time of year to avoid going to San Isidro for your holidays. The weather is often not a good and not conducive to spending time outdoors.
June is in the summer in San Isidro and is typically the 6th coldest 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 June is the 6th driest month of the year in San Isidro with around 419mm 16.5 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.
July
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 22°C | 314mm | 6.5hrs | 12.6hrs |
July in San Isidro 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 Isidro for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
July is in the summer in San Isidro and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a muggy 24°C (76°F), whilst at night 17°C (63°F) is normal.
On average July is the 6th wettest month of the year in San Isidro with around 314mm 12.4 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.
August
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 22°C | 432mm | 6.4hrs | 12.8hrs |
The weather in August in San Isidro is characteristically warm, humid and very wet.
Based on weather alone, this is probably a time of year to avoid going to San Isidro for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
August is in the summer in San Isidro and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a muggy 25°C (76°F), whilst at night 17°C (63°F) is normal.
On average August is the 5th wettest month of the year in San Isidro with around 432mm 17 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 6.4 hours of sunshine per day.
San Isidro weather in August »
September
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 22°C | 517mm | 6.2hrs | 13hrs |
San Isidro'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 Isidro 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 Isidro and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 24°C (76°F), whilst at night 17°C (63°F) is normal.
On average September is the 4th wettest month of the year in San Isidro with around 517mm 20.3 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 6.2 hours of sunshine per day.
San Isidro weather in September »
October
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 22°C | 581mm | 6.3hrs | 13.3hrs |
October is a very wet, humid month in San Isidro and the temperature is generally warm.
Based on weather alone, this is probably a time of year to avoid going to San Isidro for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
October is in the fall / autumn in San Isidro and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a muggy 24°C (75°F), whilst at night 17°C (62°F) is normal.
On average October is the 3rd wettest month of the year in San Isidro with around 581mm 22.9 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 6.3 hours of sunshine per day.
San Isidro weather in October »
November
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 22°C | 256mm | 6.4hrs | 12.4hrs |
Warm, humid and very wet weather often prevails in San Isidro during the month of November
Based on weather alone, this is probably a time of year to avoid going to San Isidro 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 Isidro and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 24°C (75°F), whilst at night 17°C (62°F) is normal.
On average November is the 2nd wettest month of the year in San Isidro with around 256mm 10.1 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 Isidro weather in November »
December
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 21°C | 76mm | 6.4hrs | 12.6hrs |
December in San Isidro is generally reasonably dry with the temperature being warm.
Although outside the main holiday season, there is still plenty of quite acceptable weather around this time of year. This makes it an okay time to visit San Isidro.
December is in the winter in San Isidro and is typically the warmest month of the year. Daytime maximum temperatures average around 24°C (75°F), whilst at night 16°C (61°F) is normal.
On average December is the wettest month of the year in San Isidro with around 76mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.4 hours of sunshine per day.
Other monthly averages
San Isidro weather stats
| Hottest month: | May | 24.9°C 76.8°F |
|---|---|---|
| Driest month: | January | 45mm 1.8ins |
| Sunniest month: | March | 7.7hrs |
| Coldest month: | January | 23.6°C 74.5°F |
| Wettest month: | October | 581mm 22.9ins |
| Warmest sea: | April | 29.2°C 84.6°F |
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