15-Day Weather Forecast - San Juan
15-day weather forecast for San Juan: temperatures from 25°C (77°F) to 30°C (86°F). Average daily high 29°C (84°F) over the next 15 days.
Hourly Forecast by Day
15-Day Temperature Trend
15-Day Weather Forecast
Updated just nowWeather Insight
San Juan's 15-day outlook ranges from a low of 25°C to a high of 30°C, with an average daytime high near 29°C. That's 1° below the long-term average high of 30°C for this time of year. Air quality is currently Moderate (AQI 65), driven mainly by PM2.5 at 18 μg/m³.
Today vs Normal
The long-term average high for today is 30°C.
28 of the last 28 days with published data ran above normal.
That's a break from the pattern - today's forecast runs below normal even though the recent stretch mostly ran above.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.
Extended Outlook for San Juan
Over the next 15 days, San Juan is forecast to see temperatures ranging from 24°C to 30°C, averaging a daily high of 29°C. The extended outlook indicates significant rainfall totalling 54.2 mm spread across 15 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.