worldweatherHot days and overnight relief
1 of 7 days ≥30°COn 7 days, the minimum temperature will stay at or above 20°C.
Weather in San Juan - 14-day forecast
Forecast updated: Tuesday 3 NovemberWeather history: NASA POWER · 1981-2025
Weather in the coming days
What will the week bring? San Juan
3 November San Juan: the high will be about 29°C and the low 24°C. Trace rainfall - around 0.3 mm. 4 November it will be similarly warm: with a high of about 29°C.
29°C
maximum on Tue 3 Nov
Temperature, rainfall and historical comparison
Weather forecast compared with previous years
Choose a day to see the details. Temperatures show the daily high and low.
Forecast: daily highTypical range 1991-2020
Selected day in detail
Tuesday 3 November
Daily high29°CUsually 28-30°C
Daily low24°CColdest part of the day
Rainfall total0.3 mmTrace rainfall
Maximum wind speed21 km/hForecast wind speed
Within the usual range. The historical comparison uses daily highs at this time of year. Less than 1 mm of rain is forecast for the day.
Full day-by-day forecast - table
| Date | Max. / min. | Rain | Typical daily high | Max. wind |
|---|---|---|---|---|
| Tuesday 3 November | 29° / 24° | 0.3 mm | 28-30°C | 21 km/h |
| Wednesday 4 November | 29° / 26° | 7.3 mm | 28-29°C | 18 km/h |
| Thursday 5 November | 28° / 25° | 5.4 mm | 28-29°C | 13 km/h |
| Friday 6 November | 29° / 25° | 20.6 mm | 28-29°C | 12 km/h |
| Saturday 7 November | 28° / 25° | 7.4 mm | 28-29°C | 13 km/h |
| Sunday 8 November | 28° / 25° | 1.3 mm | 28-29°C | 11 km/h |
| Monday 9 November | 31° / 25° | 1.4 mm | 28-29°C | 21 km/h |
| Tuesday 10 November | 33° / 26° | 0.5 mm | 28-29°C | 27 km/h |
| Wednesday 11 November | 33° / 26° | 0.2 mm | 28-29°C | 14 km/h |
| Thursday 12 November | 31° / 26° | 2.1 mm | 28-29°C | 15 km/h |
| Friday 13 November | 31° / 25° | 0.4 mm | 27-29°C | 23 km/h |
| Saturday 14 November | 31° / 26° | 0.4 mm | 27-29°C | 22 km/h |
| Sunday 15 November | 30° / 25° | 0.8 mm | 27-29°C | 25 km/h |
| Monday 16 November | 30° / 26° | 1.1 mm | 27-29°C | 20 km/h |
What stands out this week?
Temperature changes
No sharp coolingThe first 7 forecast days show no day-to-day drop of 3°C or more in the high.
Will it rain?
6 days with rain ≥1 mm7-day total: 43.7 mm. Across 45 historical seasons, the typical range for the same dates was 18-61 mm.
This summary covers the first 7 forecast days. A rainy day has at least 1 mm of rain. The historical comparison shows how often such days occurred in previous years.
Weather history 1981-2025
NASA POWERThe same week in previous years
How warm was this week in previous years?
Each bar shows the average daily high during the same 7-day period in each year.
cooler yearstypical rangewarmer years2026 forecastcurrent forecast
From 1981 to 2025, the 3-9 Nov period averaged 29°C by day. The coolest year was 1984 (27°C) and the warmest was 2019 (30°C). The current forecast averages 29°C - higher than in 76% of historical years.
How do we compare the forecast with history?
The forecast chart band shows the 20th-80th percentiles of NASA POWER daily highs from 1991-2020, using the date and a ±7-calendar-day window. The line shows the forecast daily high. The year-by-year chart compares average highs over the same seven dates.
NASA POWER (MERRA-2) data describe conditions in the grid cell covering the location. Elevation and local conditions can affect the comparison.
NASA POWER source and methodologyPlan your trip
Partner offersTravel offers: San Juan
What else should you know before travelling?
What weather is typical in the following weeks?
For dates beyond the 14-day forecast, we show typical conditions based on historical data.
Tue 17 Nov - Mon 30 Nov28°C / 25°Cusual daily high / low
Tue 1 Dec - Thu 17 Dec28°C / 24°Cusual daily high / low
Average of the daily medians for the following dates from 1991-2020. A comparison based on historical data.
Downloadable forecast graphic
Detailed weather forecast for San Juan, Puerto Rico: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
UV index in San Juan - is it safe to sunbathe?
Today the UV index in San Juan is 7 (high) - unprotected fair skin can burn in about 25 minutes. SPF 30-50, a hat and sunglasses are a must. Better stay in shade between 11:00 and 15:00.
Sea temperature - San Juan
Water today
30°C
Week avg
30°C
Waves today
1.1 m
How's the water?
very warm
16-day sea temperature forecast:
Average sea temperature through the year:
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.
Air quality and smog in San Juan
Air quality in San Juan is currently very good. Fine particulate PM2.5: 6.9 µg/m³, PM10: 10.5 µg/m³.
| City | PM2.5 (µg/m³) | PM10 (µg/m³) | Air quality |
|---|---|---|---|
| San Juan | 6.9 | 10.5 | very good |
CAMS air-quality model data provided by Open-Meteo, updated daily. Colours represent PM2.5 concentration bands. Data time: 2026-11-02 22:00.
San Juan weather through the year
| Month | Day | Night | Chance of rain |
|---|---|---|---|
| January ★ | 29°C | 23°C | 52% |
| February ★ | 29°C | 23°C | 54% |
| March ★ | 29°C | 23°C | 41% |
| April ★ | 30°C | 24°C | 46% |
| May | 31°C | 24°C | 54% |
| June | 32°C | 26°C | 42% |
| July | 32°C | 26°C | 50% |
| August | 32°C | 26°C | 55% |
| September | 32°C | 26°C | 50% |
| October | 32°C | 26°C | 49% |
| November | 30°C | 24°C | 66% |
| December | 29°C | 24°C | 66% |
★ - months most often recommended for travel
Warmest, driest months on average: January, February, March, April.
Upcoming public holidays in Puerto Rico: Veterans Day — 11 November · Discovery of Puerto Rico — 19 November · Thanksgiving Day — 26 November.
Nearby and related places
Weather and travel dates: San Juan
Based on the historical data in the climate table for this location.
Warmest months
June · July · August · September · October
Average daytime temperature: 32°C
Coolest months
January · February · March · December
Average daytime temperature: 29°C
Lowest share of days with precipitation
March
Share of days with precipitation: 41%
Before you travel
Check the forecast daytime and nighttime temperatures, precipitation and current warnings. Use them to choose clothing and plan outdoor activities.
Official travel information
Select your destination on the government website and check the latest advice. Entry requirements depend on factors including citizenship and the purpose of your trip.
FAQ - San Juan weather
What will the weather be like today and tomorrow?
3 November San Juan: the high will be about 29°C and the low 24°C. Trace rainfall - around 0.3 mm. 4 November it will be similarly warm: with a high of about 29°C.
Will it rain in the coming days?
7-day total: 43.7 mm. Across 45 historical seasons, the typical range for the same dates was 18-61 mm.
What does the typical range on the chart mean?
It is the range between the 20th and 80th percentiles of NASA POWER daily highs from 1991-2020 for this time of year.
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