When is the best time to go to San Juan
The chart above shows the best time of year to visit San Juan, United States. 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 |
|---|---|---|---|
| 19°C | 33mm | 4.5hrs | 11.5hrs |
The weather in January in San Juan is characteristically mild and reasonably dry.
Although outside the main holiday season, there is still plenty of relatively acceptable weather around this time of year. This makes it a good time to visit San Juan.
January is in the winter in San Juan and is typically the coldest month of the year. Daytime maximum temperatures average around 21°C (69°F), whilst at night 10°C (50°F) is normal.
On average January is the driest month of the year in San Juan with around 33mm 1.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.
On the flip side this corresponds to an average of 4.5 hours of sunshine per day.
February
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 20°C | 32mm | 5.6hrs | 12.1hrs |
February in San Juan is generally reasonably dry with the temperature being mild.
It is perhaps a good month to visit San Juan, with some surprisingly 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 23°C (73°F), whilst at night 11°C (52°F) is normal.
On average February is the 2nd 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 4 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.6 hours of sunshine per day.
San Juan weather in February »
March
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 24°C | 13mm | 6.5hrs | 12.8hrs |
The weather in March in San Juan is characteristically warm, humid and dry.
It is perhaps the perfect month to visit San Juan, with some surprisingly 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 27°C (80°F), whilst at night 15°C (60°F) is normal.
On average March is the 3rd driest month of the year in San Juan with around 13mm 0.5 inches of rain making it a dry time to visit. This rainfall is typically spread over 2 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.5 hours of sunshine per day.
April
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 27°C | 35mm | 7.2hrs | 13.5hrs |
San Juan's weather in April is typically hot, humid and reasonably dry in nature.
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 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 30°C (87°F), whilst at night 20°C (67°F) is normal.
On average April is the 4th driest month of the year in San Juan with around 35mm 1.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 3 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.2 hours of sunshine per day.
May
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 29°C | 77mm | 8hrs | 14.2hrs |
May is a reasonably dry, humid month in San Juan and the temperature is generally hot.
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.
May is in the spring in San Juan and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a steamy 32°C (90°F), whilst at night 22°C (72°F) is normal.
On average May is the 5th driest month of the year in San Juan with around 77mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.
On the flip side this corresponds to an average of 8 hours of sunshine per day.
June
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 31°C | 70mm | 9.8hrs | 11.5hrs |
San Juan's weather in June is typically very hot, humid and reasonably dry 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.
June is in the summer in San Juan and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a steamy 34°C (94°F), whilst at night 24°C (75°F) is normal.
On average June is the 6th driest month of the year in San Juan with around 70mm 2.8 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.8 hours of sunshine per day.
July
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 32°C | 37mm | 10.4hrs | 12.1hrs |
July in San Juan is generally reasonably dry with the temperature being very hot.
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 Juan.
July is in the summer in San Juan and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a steamy 35°C (96°F), whilst at night 24°C (76°F) is normal.
On average July is the 6th wettest month of the year in San Juan with around 37mm 1.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 3 days, although this may vary considerably.
On the flip side this corresponds to an average of 10.4 hours of sunshine per day.
August
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 32°C | 57mm | 9.5hrs | 12.8hrs |
The weather in August in San Juan is characteristically very hot, humid and reasonably dry.
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 Juan.
August is in the summer in San Juan and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a steamy 36°C (96°F), whilst at night 24°C (76°F) is normal.
On average August is the 5th wettest month of the year in San Juan with around 57mm 2.2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.5 hours of sunshine per day.
September
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 30°C | 110mm | 8hrs | 13.5hrs |
San Juan's weather in September is typically very hot, humid and damp 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 steamy 34°C (92°F), whilst at night 23°C (74°F) is normal.
On average September is the 4th wettest month of the year in San Juan with around 110mm 4.3 inches of rain making it a damp time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.
On the flip side this corresponds to an average of 8 hours of sunshine per day.
San Juan weather in September »
October
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 27°C | 60mm | 7.1hrs | 14.2hrs |
October is a reasonably dry, humid month in San Juan and the temperature is generally hot.
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 Juan.
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 30°C (86°F), whilst at night 19°C (66°F) is normal.
On average October is the 3rd wettest month of the year in San Juan with around 60mm 2.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.1 hours of sunshine per day.
November
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 27mm | 5.6hrs | 11.5hrs |
November in San Juan is generally dry with the temperature being warm.
It is perhaps the perfect month to visit San Juan, with some particularly good weather at this time of year.
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 26°C (79°F), whilst at night 15°C (59°F) is normal.
On average November is the 2nd wettest month of the year in San Juan with around 27mm 1 inches of rain making it a dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.6 hours of sunshine per day.
San Juan weather in November »
December
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 20°C | 29mm | 4.4hrs | 12.1hrs |
December in San Juan is generally dry with the temperature being mild.
It is perhaps a good month to visit San Juan, with some surprisingly good weather at this time of year.
December is in the winter in San Juan and is typically the warmest month of the year. Daytime maximum temperatures average around 22°C (72°F), whilst at night 11°C (51°F) is normal.
On average December is the wettest month of the year in San Juan with around 29mm 1.1 inches of rain making it a dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.
On the flip side this corresponds to an average of 4.4 hours of sunshine per day.
Other monthly averages
San Juan weather stats
| Hottest month: | August | 35.3°C 95.5°F |
|---|---|---|
| Driest month: | March | 13mm 0.5ins |
| Sunniest month: | July | 10.4hrs |
| Coldest month: | January | 20.3°C 68.5°F |
| Wettest month: | September | 110mm 4.3ins |
| Warmest sea: | August | 28.9°C 84°F |
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