Best time to visit San Juan
The best time to visit San Juan is January, judged on twenty years of weather records and the events worth going for.
San Juan, San Juan, Puerto Rico
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 27.1 °C / 81 °F | 22.9 °C / 73 °F | 36 mm / 1.4 in | best month, for San Sebastián Street Festival. The weather alone makes it good. |
| February | 27.3 °C / 81 °F | 22.7 °C / 73 °F | 33 mm / 1.3 in | good month |
| March | 27.6 °C / 82 °F | 22.8 °C / 73 °F | 45 mm / 1.8 in | good month |
| April | 28.2 °C / 83 °F | 23.5 °C / 74 °F | 83 mm / 3.3 in | neither best nor good |
| May | 29 °C / 84 °F | 24.5 °C / 76 °F | 114 mm / 4.5 in | neither best nor good |
| June | 30 °C / 86 °F | 25.5 °C / 78 °F | 67 mm / 2.6 in | neither best nor good |
| July | 30.1 °C / 86 °F | 25.7 °C / 78 °F | 82 mm / 3.2 in | neither best nor good |
| August | 30.2 °C / 86 °F | 25.9 °C / 79 °F | 109 mm / 4.3 in | neither best nor good |
| September | 30.2 °C / 86 °F | 25.8 °C / 78 °F | 139 mm / 5.5 in | neither best nor good |
| October | 29.8 °C / 86 °F | 25.5 °C / 78 °F | 129 mm / 5.1 in | neither best nor good |
| November | 28.5 °C / 83 °F | 24.5 °C / 76 °F | 109 mm / 4.3 in | neither best nor good |
| December | 27.5 °C / 82 °F | 23.6 °C / 74 °F | 46 mm / 1.8 in | good month |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: best
- FFebruary: good
- MMarch: good
- AApril: neither
- MMay: neither
- JJune: neither
- JJuly: neither
- AAugust: neither
- SSeptember: neither
- OOctober: neither
- NNovember: neither
- DDecember: good
- Best
- January
- Good
- February–March, December
San Juan is warm and humid all year, so nothing is truly ideal for walking tours: the drier, slightly milder Jan-Mar and Dec are good (best in January, lifted by the San Sebastián Street Festival), while the hotter, wetter Apr-Nov stretch is too sticky and rain-prone for comfortable sightseeing.
Why these months
January · best
Good weather, made best by San Sebastián Street Festival.
In its favour: precipitation 36 mm / 1.4 in, share of daylight that is sunny 98%, days with heavy rain 0.3 days, wet days 10.3 days.
Against: feels like (high) 29.4 °C / 85 °F, relative humidity 80%, average daily high 27.1 °C / 81 °F, average daily low 22.9 °C / 73 °F.
Also on: San Juan's holiday season, Three Kings Day.
Watch out for: San Sebastián Street Festival crowds.
February · good
In its favour: precipitation 33 mm / 1.3 in, share of daylight that is sunny 95%, days with heavy rain 0.6 days, wet days 8.6 days.
Against: feels like (high) 29.5 °C / 85 °F, relative humidity 78%, average daily high 27.3 °C / 81 °F, average daily low 22.7 °C / 73 °F.
Also on: Valentine's Day.
March · good
In its favour: precipitation 45 mm / 1.8 in, share of daylight that is sunny 92%, days with heavy rain 1.1 days, wet days 9.8 days.
Against: feels like (high) 30.3 °C / 87 °F, relative humidity 77%, average daily high 27.6 °C / 82 °F, average daily low 22.8 °C / 73 °F.
Also on: Good Friday and Easter Sunday, Taste of Rum Festival.
Watch out for: Spring break crowds.
December · good
In its favour: precipitation 46 mm / 1.8 in, share of daylight that is sunny 96%, days with heavy rain 0.5 days.
Against: feels like (high) 30.2 °C / 86 °F, relative humidity 81%, average daily high 27.5 °C / 82 °F, wet days 12.6 days, average daily low 23.6 °C / 74 °F.
Also on: Lighting of the Town of Bethlehem, San Juan's holiday season, White Christmas Festival.
Watch out for: Christmas hotel demand.
Beach and swimming
Hot, dry and sunny. Penalises the monsoon hard.
- JJanuary: best
- FFebruary: best
- MMarch: best
- AApril: good
- MMay: good
- JJune: best
- JJuly: good
- AAugust: good
- SSeptember: good
- OOctober: good
- NNovember: good
- DDecember: best
- Best
- June, December–March
- Good
- April–May, July–November
San Juan's beaches shine nearly year-round thanks to a consistently warm sea (27-30C) and highs that never overheat; Jan-Mar and Jun and Dec are driest and best, while Apr-May and Jul-Nov stay good despite heavier, more concentrated afternoon rain and, in mid/late summer, feels-like heat just above the ideal beach range.
Why these months
January · best
In its favour: average daily high 27.1 °C / 81 °F, precipitation 36 mm / 1.4 in, share of daylight that is sunny 98%, feels like (high) 29.4 °C / 85 °F, days with heavy rain 0.3 days, average daily low 22.9 °C / 73 °F, wind (daily max) 19 km/h / 12 mph.
Against: wet days 10.3 days.
Also on: San Sebastián Street Festival, San Juan's holiday season, Three Kings Day.
Watch out for: San Sebastián Street Festival crowds.
February · best
In its favour: average daily high 27.3 °C / 81 °F, precipitation 33 mm / 1.3 in, share of daylight that is sunny 95%, feels like (high) 29.5 °C / 85 °F, days with heavy rain 0.6 days, wet days 8.6 days, average daily low 22.7 °C / 73 °F, wind (daily max) 20 km/h / 13 mph.
Also on: Valentine's Day.
March · best
In its favour: average daily high 27.6 °C / 82 °F, precipitation 45 mm / 1.8 in, share of daylight that is sunny 92%, feels like (high) 30.3 °C / 87 °F, days with heavy rain 1.1 days, average daily low 22.8 °C / 73 °F, wind (daily max) 20 km/h / 12 mph.
Against: wet days 9.8 days.
Also on: Good Friday and Easter Sunday, Taste of Rum Festival.
Watch out for: Spring break crowds.
April · good
In its favour: average daily high 28.2 °C / 83 °F, share of daylight that is sunny 95%, feels like (high) 31.7 °C / 89 °F, average daily low 23.5 °C / 74 °F, wind (daily max) 19 km/h / 12 mph.
Against: wet days 12 days, precipitation 83 mm / 3.3 in, days with heavy rain 2.2 days, share of rain falling in the daytime 68%.
Also on: Good Friday and Easter Sunday.
May · good
In its favour: average daily high 29 °C / 84 °F, share of daylight that is sunny 92%, feels like (high) 33.3 °C / 92 °F, average daily low 24.5 °C / 76 °F, wind (daily max) 18 km/h / 11 mph.
Against: precipitation 114 mm / 4.5 in, wet days 16.1 days, days with heavy rain 3.6 days, share of rain falling in the daytime 72%.
Also on: Puerto Rican Danza Week, Saborea Puerto Rico.
June · best
In its favour: average daily high 30 °C / 86 °F, share of daylight that is sunny 93%, precipitation 67 mm / 2.6 in, days with heavy rain 1.6 days, average daily low 25.5 °C / 78 °F, wind (daily max) 20 km/h / 12 mph.
Against: feels like (high) 34.3 °C / 94 °F, wet days 13 days.
Also on: Noche de San Juan.
July · good
In its favour: average daily high 30.1 °C / 86 °F, share of daylight that is sunny 94%, average daily low 25.7 °C / 78 °F, wind (daily max) 22 km/h / 13 mph.
Against: wet days 17.1 days, precipitation 82 mm / 3.2 in, days with heavy rain 1.8 days, feels like (high) 34.3 °C / 94 °F, share of rain falling in the daytime 62%.
August · good
In its favour: average daily high 30.2 °C / 86 °F, share of daylight that is sunny 91%, average daily low 25.9 °C / 79 °F, wind (daily max) 20 km/h / 12 mph.
Against: wet days 18.9 days, precipitation 109 mm / 4.3 in, days with heavy rain 2.5 days, feels like (high) 35.1 °C / 95 °F, share of rain falling in the daytime 62%.
Also on: San Juan International Billfish Tournament, SOFO Culinary Fest.
September · good
In its favour: average daily high 30.2 °C / 86 °F, share of daylight that is sunny 89%, average daily low 25.8 °C / 78 °F, wind (daily max) 17 km/h / 10 mph.
Against: precipitation 139 mm / 5.5 in, wet days 20.4 days, days with heavy rain 3.4 days, feels like (high) 35.7 °C / 96 °F, share of rain falling in the daytime 67%.
Also on: Coffee and Chocolate Expo.
October · good
In its favour: average daily high 29.8 °C / 86 °F, share of daylight that is sunny 90%, average daily low 25.5 °C / 78 °F, wind (daily max) 16 km/h / 10 mph.
Against: precipitation 129 mm / 5.1 in, wet days 20.1 days, days with heavy rain 3.6 days, feels like (high) 35 °C / 95 °F, share of rain falling in the daytime 71%.
November · good
In its favour: average daily high 28.5 °C / 83 °F, share of daylight that is sunny 90%, feels like (high) 32.6 °C / 91 °F, average daily low 24.5 °C / 76 °F, wind (daily max) 17 km/h / 10 mph.
Against: wet days 17.9 days, precipitation 109 mm / 4.3 in, days with heavy rain 3 days, share of rain falling in the daytime 67%.
Also on: San Juan's holiday season, Thanksgiving menus.
December · best
In its favour: average daily high 27.5 °C / 82 °F, precipitation 46 mm / 1.8 in, share of daylight that is sunny 96%, feels like (high) 30.2 °C / 86 °F, days with heavy rain 0.5 days, average daily low 23.6 °C / 74 °F, wind (daily max) 19 km/h / 12 mph.
Against: wet days 12.6 days.
Also on: Lighting of the Town of Bethlehem, San Juan's holiday season, White Christmas Festival.
Watch out for: Christmas hotel demand.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Wintergreen Ski Resort, 2495 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 29.4 °C | 29.5 °C | 30.3 °C | 31.7 °C | 33.3 °C | 34.3 °C | 34.3 °C | 35.1 °C | 35.7 °C | 35 °C | 32.6 °C | 30.2 °C |
| Days with heavy rain | 0.3 days | 0.6 days | 1.1 days | 2.2 days | 3.6 days | 1.6 days | 1.8 days | 2.5 days | 3.4 days | 3.6 days | 3 days | 0.5 days |
| Time rain usually falls | 2 pm | 2 pm | 3 pm | 3 pm | 2 pm | 2 pm | 2 pm | 4 pm | 3 pm | 2 pm | 3 pm | 2 pm |
| Sunshine per day | 10.9 h | 11 h | 11.1 h | 12 h | 11.9 h | 12.3 h | 12.3 h | 11.6 h | 10.9 h | 10.5 h | 10.1 h | 10.7 h |
| Relative humidity | 80% | 78% | 77% | 78% | 80% | 80% | 80% | 82% | 82% | 83% | 83% | 81% |
Sea temperature
Averaged over a shorter period (2022–2025) than the twenty-year averages above.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature 2022–2025 | 27.2 °C | 26.7 °C | 26.8 °C | 27.1 °C | 28.2 °C | 28.9 °C | 29.1 °C | 29.5 °C | 30.1 °C | 30.2 °C | 29.1 °C | 28 °C |
| Sea temperature (daily max) 2022–2025 | 27.3 °C | 26.8 °C | 27 °C | 27.2 °C | 28.4 °C | 29.1 °C | 29.2 °C | 29.6 °C | 30.3 °C | 30.4 °C | 29.2 °C | 28.1 °C |
- Very cold 10 °C or less
- Cold 10 to 15 °C
- Cool 15 to 20 °C
- Comfortable 20 to 25 °C
- Warm 25 to 28 °C
- Very warm over 28 °C
The words describe how the water feels to swim in. They are ours, not an official standard.
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 5.8 µg/m³ | 6.7 µg/m³ | 6.1 µg/m³ | 6.3 µg/m³ | 6.2 µg/m³ | 9.8 µg/m³ | 11.3 µg/m³ | 7.5 µg/m³ | 6 µg/m³ | 6.4 µg/m³ | 5.3 µg/m³ | 5.5 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 7.3 µg/m³ | 8.5 µg/m³ | 7.9 µg/m³ | 8.4 µg/m³ | 8.6 µg/m³ | 13.6 µg/m³ | 16.8 µg/m³ | 10.9 µg/m³ | 8.8 µg/m³ | 9.3 µg/m³ | 7.5 µg/m³ | 7.3 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.
Events and seasons
What the weather records cannot show. A major event can lift a month to good or best. The warnings are there to help you plan, and never count against a month.
Reasons to go
- San Sebastián Street Festival Major
January, dates vary from year to year
- Three Kings Day
6 January
- San Juan's holiday season
27 November–21 January, dates vary from year to year
- Valentine's Day
14 February
- Taste of Rum Festival
March
- Good Friday and Easter Sunday
March and April, dates vary from year to year
- Saborea Puerto Rico
May
- Puerto Rican Danza Week
May
- Noche de San Juan
June
- San Juan International Billfish Tournament
August
- SOFO Culinary Fest
August
- Coffee and Chocolate Expo
September
- Thanksgiving menus
November, dates vary from year to year
- White Christmas Festival
December
- Lighting of the Town of Bethlehem
December
Worth knowing before you go
- San Sebastián Street Festival crowds
January, dates vary from year to year
- Spring break crowds
March
- Christmas hotel demand
December
World Heritage sites nearby
UNESCO World Heritage sites within 25 km, nearest first.
- La Fortaleza and San Juan National Historic Site
1 km away