San Juan, Puerto Rico at a glance
- Best time
- Dec – Apr
- Warmest month
- Jul · 32°
- Warmest sea
- Sep · 29.1°
- Sunshine a year
- 3,200 h
- Rain a year
- 911 mm
- Climate
- Tropical
- Time zone
- UTC−4
- Elevation
- 7 m
Climate in San Juan, Puerto Rico
San Juan, Puerto Rico has a tropical climate: it is warm all year round, and the seasons differ mainly in how much rain falls. July is the warmest month with average highs of 32 °C, while January is the coolest at 28 °C. With around 3,200 hours of sunshine a year, San Juan, Puerto Rico is very sunny; June is the sunniest month with 9.4 hours a day.
Weather in October
Holiday weather in October
Fair
Best time to visit: December – April
October is the peak of the hurricane season
What is the weather like in San Juan, Puerto Rico in October?
In October, San Juan, Puerto Rico is hot: daytime highs average 31 °C, and even at night it stays warm at around 24 °C. The sea averages 29.1 °C – almost as warm as a bath. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 20 days, totalling 123 mm. On about 21 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is a so-so month for a holiday in San Juan, Puerto Rico.
More details for October
- Daylight
- 11 h 45 min06:18 – 18:03
- UV index
- 10 · very highclear sky, noon (estimate)
- Muggy days
- 31 daysdew point 18 °C or more
- Wind
- 16 km/haverage daily peak
- Cloud cover
- 59 %on average
- Hot days
- 21 days30 °C or more
- Time zone
- UTC−4America/Puerto_Rico
How the score comes together
- Temperatureweight 50 %56 %
- Sunshineweight 20 %83 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Sea temperature in San Juan, Puerto Rico
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 28.6 – 29.6 °C
Swimming season: All year
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in San Juan, Puerto Rico ranges from 26.3 °C in February to 29.1 °C in September. At 20 °C and more, the sea is warm enough for swimming all year round.
The sea warms up slowly: it is warmest in September, while the air already peaks in July. The sea temperature varies from year to year: in September, eight out of ten years were between 28.7 and 29.7 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 26.6° | 26.0° | 27.1° | warm |
| FebruaryFeb | 26.3° | 25.7° | 26.9° | warm |
| MarchMar | 26.3° | 25.6° | 26.8° | warm |
| AprilApr | 26.7° | 26.0° | 27.3° | warm |
| MayMay | 27.3° | 26.6° | 28.1° | warm |
| JuneJun | 28.1° | 27.5° | 28.5° | warm |
| JulyJul | 28.3° | 27.9° | 28.9° | warm |
| AugustAug | 28.8° | 28.4° | 29.4° | warm |
| SeptemberSep | 29.1° | 28.7° | 29.7° | very warm |
| OctoberOct | 29.1° | 28.6° | 29.6° | very warm |
| NovemberNov | 28.5° | 28.0° | 28.9° | warm |
| DecemberDec | 27.4° | 26.8° | 28.0° | warm |
Sunshine hours in San Juan, Puerto Rico
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 8.0 of 11.7 hours of daylight in San Juan, Puerto Rico, 68 % of the day.
Sunshine hours count the time with bright, direct sunshine (WMO definition, estimated from model data); daylight is the time from sunrise to sunset on the 15th of the month.
Rain in San Juan, Puerto Rico: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, San Juan, Puerto Rico has about 20 rainy days with 123 mm of rain in total.
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 79 | 28° | 22° | 26.6° | 8.8 h | 10 | 39 |
| FebruaryFeb | 79 | 29° | 22° | 26.3° | 8.7 h | 9 | 30 |
| MarchMar | 75 | 29° | 22° | 26.3° | 9.0 h | 9 | 42 |
| AprilApr | 65 | 30° | 22° | 26.7° | 9.3 h | 11 | 76 |
| MayMay | 53 | 31° | 24° | 27.3° | 8.8 h | 15 | 103 |
| JuneJun | 54 | 31° | 25° | 28.1° | 9.4 h | 13 | 62 |
| JulyJul | 47 | 32° | 25° | 28.3° | 9.4 h | 16 | 68 |
| AugustAug | 42 | 32° | 25° | 28.8° | 9.0 h | 18 | 86 |
| SeptemberSep | 41 | 31° | 25° | 29.1° | 8.3 h | 21 | 131 |
| OctoberOct | 45 | 31° | 24° | 29.1° | 8.0 h | 20 | 123 |
| NovemberNov | 55 | 29° | 23° | 28.5° | 7.8 h | 18 | 105 |
| DecemberDec | 73 | 28° | 22° | 27.4° | 8.6 h | 12 | 47 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)
18.47° N, 66.11° W · 7 m · America/Puerto_Rico
Best time to visit San Juan, Puerto Rico
The best time to visit San Juan, Puerto Rico is from December to April. For a beach holiday with the sea above 21 °C, go from January to April. Rain is most frequent from May to December; the wettest month is September with 131 mm.
Find your perfect month
Tell us what you like and we rate every month in San Juan, Puerto Rico for you.
Your best months: December – February
Based on the climate averages; tap a month to see its details.
Which month for what?
Beach & swimming
Jan – Apr
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
No month
15–28 °C and not too much rain
Rainy months
May – Dec
12 or more rainy days
San Juan, Puerto Rico month by month
The typical weather for every month at a glance.
79January28° · Sea 27° · 9 h
In January, San Juan, Puerto Rico is hot: daytime highs average 28 °C, and even at night it stays warm at around 22 °C. The sea averages 26.6 °C – lovely and warm for swimming. The sun shines for around 9 hours a day. Rain is frequent, with about 10 rainy days and 39 mm in total. The air is often humid and muggy. All in all, January is a good month for a holiday in San Juan, Puerto Rico.
San Juan, Puerto Rico in January79February29° · Sea 26° · 9 h
In February, San Juan, Puerto Rico is hot: daytime highs average 29 °C, and even at night it stays warm at around 22 °C. The sea averages 26.3 °C – lovely and warm for swimming. The sun shines for around 9 hours a day. Rain falls on about 9 days, adding up to 30 mm. The air is often humid and muggy. All in all, February is a good month for a holiday in San Juan, Puerto Rico.
San Juan, Puerto Rico in February75March29° · Sea 26° · 9 h
In March, San Juan, Puerto Rico is hot: daytime highs average 29 °C, and even at night it stays warm at around 22 °C. The sea averages 26.3 °C – lovely and warm for swimming. With around 9 hours of sunshine a day, there is plenty of sun. Rain falls on about 9 days, adding up to 42 mm. On about 11 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, March is a good month for a holiday in San Juan, Puerto Rico.
San Juan, Puerto Rico in March65April30° · Sea 27° · 9 h
In April, San Juan, Puerto Rico is hot: daytime highs average 30 °C, and even at night it stays warm at around 22 °C. The sea averages 26.7 °C – lovely and warm for swimming. With around 9 hours of sunshine a day, there is plenty of sun. Rain is frequent, with about 11 rainy days and 76 mm in total. On about 15 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, April is a good month for a holiday in San Juan, Puerto Rico.
San Juan, Puerto Rico in April53May31° · Sea 27° · 9 h
In May, San Juan, Puerto Rico is hot: daytime highs average 31 °C, and even at night it stays warm at around 24 °C. The sea averages 27.3 °C – lovely and warm for swimming. The sun shines for around 9 hours a day. It is the rainy season: rain falls on about 15 days, totalling 103 mm. On about 20 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, May is a so-so month for a holiday in San Juan, Puerto Rico.
San Juan, Puerto Rico in May54June31° · Sea 28° · 9 h
In June, San Juan, Puerto Rico is hot: daytime highs average 31 °C, and even at night it stays warm at around 25 °C. The sea averages 28.1 °C – lovely and warm for swimming. With around 9 hours of sunshine a day, there is plenty of sun. Rain is frequent, with about 13 rainy days and 62 mm in total. On about 26 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, June is a so-so month for a holiday in San Juan, Puerto Rico.
San Juan, Puerto Rico in June47July32° · Sea 28° · 9 h
In July, San Juan, Puerto Rico is hot: daytime highs average 32 °C, and even at night it stays warm at around 25 °C. The sea averages 28.3 °C – lovely and warm for swimming. With around 9 hours of sunshine a day, there is plenty of sun. It is the rainy season: rain falls on about 16 days, totalling 68 mm. On about 28 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is a so-so month for a holiday in San Juan, Puerto Rico.
San Juan, Puerto Rico in July42August32° · Sea 29° · 9 h
In August, San Juan, Puerto Rico is hot: daytime highs average 32 °C, and even at night it stays warm at around 25 °C. The sea averages 28.8 °C – lovely and warm for swimming. With around 9 hours of sunshine a day, there is plenty of sun. It is the rainy season: rain falls on about 18 days, totalling 86 mm. On about 29 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is a so-so month for a holiday in San Juan, Puerto Rico.
San Juan, Puerto Rico in August41September31° · Sea 29° · 8 h
In September, San Juan, Puerto Rico is hot: daytime highs average 31 °C, and even at night it stays warm at around 25 °C. The sea averages 29.1 °C – almost as warm as a bath. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 21 days, totalling 131 mm. On about 26 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is a so-so month for a holiday in San Juan, Puerto Rico.
San Juan, Puerto Rico in September45October31° · Sea 29° · 8 h
In October, San Juan, Puerto Rico is hot: daytime highs average 31 °C, and even at night it stays warm at around 24 °C. The sea averages 29.1 °C – almost as warm as a bath. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 20 days, totalling 123 mm. On about 21 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is a so-so month for a holiday in San Juan, Puerto Rico.
San Juan, Puerto Rico in October55November29° · Sea 29° · 8 h
In November, San Juan, Puerto Rico is hot: daytime highs average 29 °C, and even at night it stays warm at around 23 °C. The sea averages 28.5 °C – lovely and warm for swimming. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 18 days, totalling 105 mm. On about 7 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, November is a so-so month for a holiday in San Juan, Puerto Rico.
San Juan, Puerto Rico in November73December28° · Sea 27° · 9 h
In December, San Juan, Puerto Rico is hot: daytime highs average 28 °C, and even at night it stays warm at around 22 °C. The sea averages 27.4 °C – lovely and warm for swimming. The sun shines for around 9 hours a day. Rain is frequent, with about 12 rainy days and 47 mm in total. The air is often humid and muggy. All in all, December is a good month for a holiday in San Juan, Puerto Rico.
San Juan, Puerto Rico in DecemberPlanning a trip to San Juan, Puerto Rico
Getting there
Flying from
- Nonstop flight
- about 8 h 35 min
- Distance
- 6,730 km
- Time zone
- UTC−4
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Storm season
San Juan, Puerto Rico lies in an area that Atlantic hurricanes can reach. The hurricane season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
- January
- February
- March
- April
- May
- June: Season
- July: Season
- August: Peak
- September: Peak
- October: Peak
- November: Season
- December
Official season dates of the regional warning centres (NOAA, JMA, IMD, Météo-France, BoM); not a forecast.
Frequently asked questions about San Juan, Puerto Rico
When is the best time to visit San Juan, Puerto Rico?
The best time to visit San Juan, Puerto Rico is from December to April. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in San Juan, Puerto Rico?
The sea temperature in San Juan, Puerto Rico ranges from 26.3 °C in February to 29.1 °C in September. At 20 °C and more, the sea is warm enough for swimming all year round.
Can you swim in San Juan, Puerto Rico in October?
Yes. In October the sea averages 29.1 °C – almost as warm as a bath.
What is the warmest month in San Juan, Puerto Rico?
July is the warmest month, with average highs of 32 °C and nights around 25 °C. January is the coolest month at 28 °C.
When does it rain most in San Juan, Puerto Rico?
Rain is most frequent from May to December; the wettest month is September with 131 mm. The driest month is February with 30 mm.
How many hours of sunshine does San Juan, Puerto Rico get?
San Juan, Puerto Rico gets around 3,200 hours of sunshine a year. The sunniest month is June with 9.4 hours a day; in November there are 7.8 hours a day.
What time zone is San Juan, Puerto Rico in?
San Juan, Puerto Rico uses the time zone America/Puerto_Rico, at UTC−4 all year.
How long is the flight from London to San Juan, Puerto Rico?
A nonstop flight from London to San Juan, Puerto Rico takes about 8 h 35 min, for a straight-line distance of about 6,730 km.
When is hurricane season in San Juan, Puerto Rico?
San Juan, Puerto Rico lies in an area that Atlantic hurricanes can reach. The hurricane season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
Near San Juan, Puerto Rico
Other destinations close by.