🇵🇷 Weather in San Juan
Current Weather in San Juan
Small Craft Advisory issued July 8 at 3:35AM AST until July 9 at 12:00AM AST by NWS San Juan PR
28°C
Feels like 31°C. Patchy rain nearby.
Map Overlays:
Hourly Forecast for San Juan
09:00
29°
19%
10:00
29°
17%
11:00
30°
20%
12:00
30°
17%
13:00
30°
14%
14:00
30°
15%
15:00
30°
12%
16:00
29°
12%
17:00
29°
15%
18:00
28°
17%
19:00
27°
21%
20:00
27°
20%
21:00
27°
17%
22:00
27°
20%
23:00
27°
17%
00:00
27°
20%
01:00
27°
21%
02:00
27°
20%
03:00
27°
22%
04:00
26°
18%
05:00
26°
18%
06:00
26°
19%
07:00
27°
16%
08:00
28°
13%
14-Day Forecast for San Juan
2026-07-08
Patchy rain nearby
30° /
26°
2026-07-09
Patchy rain nearby
31° /
26°
2026-07-10
Patchy rain nearby
30° /
26°
2026-07-11
Patchy rain nearby
30° /
26°
2026-07-12
Patchy rain nearby
30° /
26°
2026-07-13
Patchy rain nearby
30° /
25°
2026-07-14
Patchy rain nearby
30° /
26°
Additional Forecasts for San Juan
Air Quality
💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 100.0 μg/m³
O₃ (Ozone) 43.0 μg/m³
NO₂ (Nitrogen Dioxide) 0.5 μg/m³
SO₂ (Sulphur Dioxide) 0.2 μg/m³
PM2.5 (Fine particles) 4.2 μg/m³
PM10 (Coarse particles) 7.9 μg/m³
Historical Weather
Weather Forecasts for Other Cities in Puerto Rico
Weather in San Juan — FAQ
Answers refreshed each request based on current conditions in San Juan.
What is the weather like right now in San Juan?
Right now in San Juan, Puerto Rico the temperature is 27.8°C (feels like 31.1°C), with patchy rain nearby. Relative humidity is 76% and wind is 23.8 km/h.
What is today's high and low temperature in San Juan?
Today's forecast high in San Juan is 30.1°C and the overnight low is 25.9°C. The diurnal range — high minus low — depends on cloud cover; clear days swing more than overcast ones.
Will it rain in San Juan today?
The chance of precipitation in San Juan today is 64%. Forecast accuracy is highest within the next 6 hours and decreases steadily out to 14 days.
How often does the weather here update?
Current observations refresh every 15-60 minutes from the nearest monitoring stations operated by national meteorological agencies. The hourly forecast updates approximately every hour; the 7- and 14-day outlook is recomputed several times per day.
What does 'feels like' temperature mean?
Feels-like (apparent) temperature accounts for humidity, wind chill and direct sunshine — variables that change how the human body perceives heat or cold. On hot, humid days it can be 3-7°C above the actual reading; on cold windy days it can be 5-15°C below.
Why does the temperature in San Juan differ from nearby cities?
Even short distances can change temperatures noticeably. San Juan's reading reflects altitude, proximity to large bodies of water, urban heat island effects, and the exact location of the monitoring stations supplying the data. Coastal cities are typically milder and more humid than inland equivalents.