Current Conditions

San Juan, San Juan

77°F25°C

Rain

Wind

E 4 mph7 km/h

Humidity

93%

Cloud Cover

41%

As of Wednesday, September 2, 2026 at 1:05 AM AST

Today's Outlook

Day

Mostly cloudy and warm, with a high of 86°F30°C and morning low of 80°F27°C — feels like 95°F35°C. Light wind from the E around 5 mph9 km/h. 98% chance of rain throughout the day. Heavy, humid air.

Night

Partly cloudy, with a low around 76°F25°C. Light wind from the ENE around 4 mph6 km/h. 60% chance of showers overnight.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Rain	High 86°F30°CFeels 95°F35°C	Low 76°F25°C	Precip 0.33 in8.5 mm98%	Cloud 47%	Wind E 5 mph7 km/h	Wednesday: Mostly cloudy and warm, with a high of 86°F30°C and morning low of 80°F27°C — feels like 95°F35°C. Light wind from the E around 5 mph9 km/h. 98% chance of rain throughout the day. Heavy, humid air. Wednesday Night: Partly cloudy, with a low around 76°F25°C. Light wind from the ENE around 4 mph6 km/h. 60% chance of showers overnight.
Drizzle	High 87°F31°CFeels 94°F35°C	Low 76°F24°C	Precip 0.06 in1.4 mm51%	Cloud 46%	Wind E 5 mph8 km/h	Thursday: Partly cloudy and hot, with a high of 87°F31°C and morning low of 80°F27°C — feels like 95°F35°C. Breezy from the E at 6 to 7 mph10 to 11 km/h. 51% chance of drizzle throughout the day. Heavy, humid air. Thursday Night: Partly cloudy, with a low around 76°F24°C. Light wind from the E around 4 mph6 km/h. 10% chance of drizzle.
Showers	High 87°F30°CFeels 95°F35°C	Low 76°F25°C	Precip 0.06 in1.6 mm62%	Cloud 56%	Wind ESE 6 mph9 km/h	Friday: Mostly cloudy and hot, with a high of 87°F30°C and morning low of 80°F27°C — feels like 95°F35°C. Breezy from the ESE at 7 to 8 mph12 to 13 km/h. 62% chance of showers throughout the day. Heavy, humid air. Friday Night: Mostly cloudy, with a low around 76°F25°C. Light wind from the E around 4 mph7 km/h. 15% chance of drizzle in the evening.
Light Rain	High 86°F30°CFeels 97°F36°C	Low 78°F25°C	Precip 0.16 in4 mm95%	Cloud 76%	Wind ESE 6 mph9 km/h	Saturday: Mostly cloudy and hot, with a high of 86°F30°C and morning low of 80°F27°C — feels like 97°F36°C. Breezy from the ESE at 7 to 8 mph11 to 13 km/h. 95% chance of light rain throughout the day. Heat risk in the afternoon. Saturday Night: Mostly cloudy, with a low around 78°F25°C. Light wind from the E around 4 mph7 km/h. 26% chance of drizzle throughout the night.
Light Rain	High 87°F31°CFeels 98°F37°C	Low 78°F25°C	Precip 0.15 in3.7 mm84%	Cloud 83%	Wind ESE 5 mph8 km/h	Sunday: Overcast and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 99°F37°C. Breezy from the ESE at 6 to 7 mph10 to 11 km/h. 84% chance of light rain throughout the day. Heat risk in the afternoon. Sunday Night: Overcast, with a low around 78°F25°C. Light wind from the ESE around 4 mph6 km/h. 14% chance of drizzle overnight.
Light Rain	High 87°F31°CFeels 99°F37°C	Low 78°F25°C	Precip 0.15 in3.8 mm78%	Cloud 73%	Wind ESE 5 mph8 km/h	Monday: Mostly cloudy and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 99°F37°C. Breezy from the ESE at 6 to 7 mph10 to 12 km/h. 78% chance of light rain throughout the day. Heat risk in the afternoon. Monday Night: Mostly cloudy, with a low around 78°F25°C. Light wind from the ESE around 4 mph6 km/h. 17% chance of drizzle before dawn.
Showers	High 87°F31°CFeels 96°F36°C	Low 78°F25°C	Precip 0.08 in2 mm51%	Cloud 60%	Wind E 7 mph12 km/h	Tuesday: Mostly cloudy and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 97°F36°C. Breezy from the E at 9 to 10 mph14 to 16 km/h. 51% chance of showers throughout the day. Heat risk in the afternoon. Tuesday Night: Mostly cloudy, with a low around 78°F25°C. Breezy from the E at 6 to 7 mph10 to 11 km/h. 22% chance of drizzle throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 2	86°F30°C Feels 95°F35°C	76°F25°C	0.33 in8.5 mm· 98%	47%	Rain	E 5 mph7 km/h
DayMostly cloudy and warm, with a high of 86°F30°C and morning low of 80°F27°C — feels like 95°F35°C. Light wind from the E around 5 mph9 km/h. 98% chance of rain throughout the day. Heavy, humid air. NightPartly cloudy, with a low around 76°F25°C. Light wind from the ENE around 4 mph6 km/h. 60% chance of showers overnight.
	ThursdaySep 3	87°F31°C Feels 94°F35°C	76°F24°C	0.06 in1.4 mm· 51%	46%	Drizzle	E 5 mph8 km/h
DayPartly cloudy and hot, with a high of 87°F31°C and morning low of 80°F27°C — feels like 95°F35°C. Breezy from the E at 6 to 7 mph10 to 11 km/h. 51% chance of drizzle throughout the day. Heavy, humid air. NightPartly cloudy, with a low around 76°F24°C. Light wind from the E around 4 mph6 km/h. 10% chance of drizzle.
	FridaySep 4	87°F30°C Feels 95°F35°C	76°F25°C	0.06 in1.6 mm· 62%	56%	Showers	ESE 6 mph9 km/h
DayMostly cloudy and hot, with a high of 87°F30°C and morning low of 80°F27°C — feels like 95°F35°C. Breezy from the ESE at 7 to 8 mph12 to 13 km/h. 62% chance of showers throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 76°F25°C. Light wind from the E around 4 mph7 km/h. 15% chance of drizzle in the evening.
	SaturdaySep 5	86°F30°C Feels 97°F36°C	78°F25°C	0.16 in4 mm· 95%	76%	Light Rain	ESE 6 mph9 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 80°F27°C — feels like 97°F36°C. Breezy from the ESE at 7 to 8 mph11 to 13 km/h. 95% chance of light rain throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 78°F25°C. Light wind from the E around 4 mph7 km/h. 26% chance of drizzle throughout the night.
	SundaySep 6	87°F31°C Feels 98°F37°C	78°F25°C	0.15 in3.7 mm· 84%	83%	Light Rain	ESE 5 mph8 km/h
DayOvercast and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 99°F37°C. Breezy from the ESE at 6 to 7 mph10 to 11 km/h. 84% chance of light rain throughout the day. Heat risk in the afternoon. NightOvercast, with a low around 78°F25°C. Light wind from the ESE around 4 mph6 km/h. 14% chance of drizzle overnight.
	MondaySep 7	87°F31°C Feels 99°F37°C	78°F25°C	0.15 in3.8 mm· 78%	73%	Light Rain	ESE 5 mph8 km/h
DayMostly cloudy and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 99°F37°C. Breezy from the ESE at 6 to 7 mph10 to 12 km/h. 78% chance of light rain throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 78°F25°C. Light wind from the ESE around 4 mph6 km/h. 17% chance of drizzle before dawn.
	TuesdaySep 8	87°F31°C Feels 96°F36°C	78°F25°C	0.08 in2 mm· 51%	60%	Showers	E 7 mph12 km/h
DayMostly cloudy and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 97°F36°C. Breezy from the E at 9 to 10 mph14 to 16 km/h. 51% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 78°F25°C. Breezy from the E at 6 to 7 mph10 to 11 km/h. 22% chance of drizzle throughout the night.
	WednesdaySep 9	87°F31°C Feels 97°F36°C	78°F25°C	0.1 in2.6 mm· 72%	44%	Showers	E 9 mph14 km/h
DayPartly cloudy and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 97°F36°C. Breezy from the E at 10 to 12 mph17 to 19 km/h. 72% chance of showers throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 78°F25°C. Breezy from the E at 7 to 8 mph12 to 12 km/h. 29% chance of drizzle throughout the night.
	ThursdaySep 10	86°F30°C Feels 96°F36°C	78°F26°C	0.12 in3 mm· 64%	52%	Showers	E 8 mph13 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 81°F27°C — feels like 97°F36°C. Breezy from the E at 10 to 11 mph16 to 18 km/h. 64% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 78°F26°C. Breezy from the E at 7 mph11 km/h. 28% chance of drizzle throughout the night.
	FridaySep 11	88°F31°C Feels 97°F36°C	78°F25°C	0.05 in1.3 mm· 34%	50%	Drizzle	E 7 mph12 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 81°F27°C — feels like 97°F36°C. Breezy from the ESE at 9 to 10 mph14 to 15 km/h. 34% chance of drizzle throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 78°F25°C. Light wind from the E around 6 mph9 km/h. 10% chance of drizzle overnight.
	SaturdaySep 12	88°F31°C Feels 95°F35°C	77°F25°C	0.03 in0.8 mm· 29%	42%	Drizzle	E 7 mph11 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 81°F27°C — feels like 95°F35°C. Breezy from the E at 8 to 9 mph14 to 15 km/h. 29% chance of drizzle in the afternoon. Heat risk in the afternoon. NightPartly cloudy, with a low around 77°F25°C. Light wind from the E around 6 mph9 km/h. 10% chance of drizzle.
	SundaySep 13	87°F30°C Feels 94°F35°C	77°F25°C	0.06 in1.5 mm· 44%	43%	Drizzle	E 7 mph11 km/h
DayPartly cloudy and hot, with a high of 87°F30°C and morning low of 80°F27°C — feels like 95°F35°C. Breezy from the E at 9 mph14 km/h. 44% chance of drizzle throughout the day. Heavy, humid air. NightPartly cloudy, with a low around 77°F25°C. Light wind from the E around 6 mph9 km/h. 17% chance of drizzle in the evening.
	MondaySep 14	86°F30°C Feels 94°F35°C	77°F25°C	0.09 in2.2 mm· 61%	50%	Showers	E 7 mph11 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 80°F27°C — feels like 95°F35°C. Breezy from the E at 8 to 9 mph13 to 14 km/h. 61% chance of showers throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 77°F25°C. Light wind from the E around 5 mph8 km/h. 24% chance of drizzle in the evening.
	TuesdaySep 15	86°F30°C Feels 93°F34°C	76°F25°C	0.12 in3.1 mm· 63%	56%	Showers	E 6 mph10 km/h
DayMostly cloudy and warm, with a high of 86°F30°C and morning low of 80°F27°C — feels like 93°F34°C. Breezy from the E at 8 to 9 mph12 to 14 km/h. 63% chance of showers throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 76°F25°C. Light wind from the E around 5 mph8 km/h. 25% chance of drizzle throughout the night.
	WednesdaySep 16	86°F30°C Feels 94°F35°C	76°F25°C	0.12 in3.1 mm· 68%	61%	Showers	E 6 mph10 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 80°F26°C — feels like 95°F35°C. Breezy from the E at 8 mph12 km/h. 68% chance of showers throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 76°F25°C. Light wind from the E around 5 mph8 km/h. 24% chance of drizzle throughout the night.

Nearby Cities

Cataño2 mi3 km Levittown5 mi8 km Bayamón6 mi9 km Guaynabo8 mi12 km Candelaria8 mi13 km Trujillo Alto10 mi16 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 18.4663°N, 66.1057°W·Elevation: 7m·Timezone: America/Puerto_Rico·Population: 418,140