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Shaded-relief map of San Juan, Puerto Rico: rivers, roads, the city limits and where the water drains.
PUERTO RICO · SAN JUAN MUNICIPIO

San Juan

322,854 people, 40 ft above sea level in San Juan Municipio.

40 ftElevation, city center
322,854People, 2024 estimate
40 sq miLand area
Clear 84°
Clear now Dew point 75° · SE 5 mph · high 83°
City of San Juan River Interstate 2 miles
Explore the plate Order a print

The San Juan plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.

MILE1
TODAY

Today in San Juan

NWS forecast and National Blend of Models · updated 7:00 PM AST
RIGHT NOW Luis Munoz Marin International Airport (TJSJ) · 7:56 PM
Clear
84° Clear Feels like 92° · high of 83° near 9 PM
WindSE 5 mphno gusts
Humidity74%rising to 85% by morning
Pressure30.01 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 75° · Oppressiveabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Showers
Tuesday, about 3 AMin about 55 hours · 75% chance · showers
LIKELY AMOUNT0–0.02 inmost likely 0; 1 in 10 over 0.07
LAST RAINNov. 90.06 in · 5 dry days
ALERTS & OUTLOOKS
No watches or warnings for San Juan Municipio
NWS San Juan and the Storm Prediction Center · checked 8:21 PM
SUN & MOON
↑ 6:30 AM5:47 PM ↓
11 h 17 m of daylight, 1 minute less than yesterday
Waxing crescent, 27% lit. Next full moon: Nov. 24.
AIR & POLLEN
65
MODERATEAir quality index · fine particles
No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
SATURDAY, NOV. 14
SUNDAY, NOV. 15
MONDAY, NOV. 16
TUESDAY, NOV. 17
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
2p
5p
partly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy day
mostly cloudy day
mostly cloudy day
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy day
partly cloudy day
partly cloudy day
partly cloudy night
partly cloudy night
partly cloudy night
showers night
showers night
showers day
showers day
showers day
showers night
TEMPERATURE °F
82°
79°
90°
78°
88°
80°
87°
CHANCE OF RAIN
75% · 0.11 in Tuesday afternoon 50%
WIND, MPH
8
8
7
7
8
9
10
9
7
5
4
4
7
11
11
10
9
8
8
8
10
12
12
11
HOW IT FEELS · DEW POINT
Oppressive: dew points 72 to 75°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 86° / 75°
SAT Nov. 14 Partly cloudy Partly cloudy
83° 79°
0% rain — SSE 8 A
SUN Nov. 15 Mostly cloudy; hot Mostly cloudy; hot
90° 78°
0% rain — ESE 9 C
MON Nov. 16 Partly cloudy; hot Partly cloudy; hot
90° 79°
30% rain — E 9 A
TUE Nov. 17 Showers likely; hot Showers likely; hot
90° 78°
80% rain up to 0.2″ E 10 A
WED Nov. 18 Showers likely Showers likely
89° 77°
80% rain up to 0.2″ E 8 A
THU Nov. 19 Chance of showers; hot Chance of showers; hot
90° 77°
50% rain up to 0.05″ SE 7 A
FRI Nov. 20 Chance of showers; hot Chance of showers; hot
90° 77°
50% rain up to 0.05″ SE 6 A
How sure are we? AModels agree: highs within 4° BSome spread: within 8° CWide spread: check back
Range from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL

Where today’s air came from

The air arriving over San Juan about 5,000 feet above the ground was over the tropical Atlantic three days ago, about 1,040 miles back along its path. Air off the water carries moisture, which is why it feels humid. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.

THIS WEEK IN 1983 Nov. 12, 1983

The hottest this week has been

93° on Nov. 12, 1983, the hottest reading for this week of the year since 1898. Next is 92° in 1981.

92°
93°
19811983
Source: NOAA RCC-ACIS, the San Juan Area threaded record since 1898.
MILE2
THE GROUND

What San Juan stands on

San Juan’s center stands about 40 ft above sea level. Within three miles the land runs from 0 ft to 280 ft, a difference of 280 ft: rolling country. The highest named summit within 15 miles is Cerro La Tiza, about 2,140 ft, 14 miles southwest.

San Juan, cut in half from southwest to northeast

A section southwest to northeast, 24 miles through the town center
0 ft500 ft1,000 ft SAN JUAN40 ftCerro Marquesa1,640 ftCerro Magueyes560 ftCaño Martin Peña10 ft ← SW · Aguas BuenasNE →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 13×.

Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR.
MILE5
THE ALMANAC

San Juan’s year

1991–2020 normals · records since 1898 · San Juan L M Marin International Airport, 4 mi east-northeast

San Juan has a tropical monsoon climate. Summer afternoons average 89° in June; winter nights fall to about 72° in January. About 60 inches of rain fall in a normal year.

83°72°84°72°85°72°86°74°87°76°89°77°89°78°89°78°89°78°89°77°86°75°84°73° JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 1 TODAY SAN JUAN 59.9 in rain a year
Normal high to low, by month Record high to low, by day Rain by month
June, average89° / 77°high / low, the warmest month
January, average83° / 72°high / low, the coldest month
Rain a year59.9 inwettest months: November and September
Hottest on record98°FOctober 9, 1981
Coldest on record60°FMarch 3, 1957
Wettest day on record9.67 inAugust 15, 1944
90° days a year72none reach 100°
Climate typeTropical monsoonKöppen Am

AROUND THE RING

1Wettest stretchSeptember through November: 19.1 of the year’s 59.9 inches
NOVEMBER 14 IN THE RECORD

On November 14 San Juan normally reaches 86° and falls to 75°. The record high is 92°, in 1981; the record low 68°, in 1961. The most rain on this date, 1.54 in, fell in 1948.

MONTH BY MONTH
JanFebMarAprMayJunJulAugSepOctNovDec
Normal high83°84°85°86°87°89°89°89°89°89°86°84°
Normal low72°72°72°74°76°77°78°78°78°77°75°73°
Rain, inches4.072.582.184.605.544.666.026.296.505.217.374.85
Record high92° (1983)96° (1983)96° (1983)97° (1983)96° (1980)97° (1988)95° (1981)97° (1980)97° (1981)98° (1981)96° (1981)94° (1989)
Record low61° (1962)62° (1968)60° (1957)64° (1968)66° (1962)66° (1909)69° (1959)68° (1904)69° (1960)67° (1959)65° (1898)62° (1917)

Normals 1991–2020 and records since 1898 from the San Juan Area threaded record (San Juan L M Marin International Airport, 4 miles east-northeast). NOAA, through RCC-ACIS.
MILE7
ON THE NETWORK

Around San Juan on the Forecast Network

Neighboring plates

Carolina PR · 6 MI 6 miles east Bayamón PR · 7 MI 7 miles west Ponce PR · 46 MI 46 miles southwest Mayagüez PR · 72 MI 72 miles west
FORECASTCITY
Map of San Juan, Puerto Rico. Explore the plate
PUERTO RICO · SAN JUAN

San Juan

322,854 people, 40 ft above sea level in San Juan Municipio.

40 ftElevation
322,854People
40 sq miLand
Clear 84°
ClearDew point 75°
1

Today in San Juan

NEXT 15 HOURS
Now partly cloudy night 82° 0%
11p partly cloudy night 82° 0%
2a partly cloudy night 81° 0%
5a mostly cloudy night 79° 0%
8a mostly cloudy day 82° 0%
11a mostly cloudy day 87° 0%
Showers
NEXT RAINTuesday about 3 AM · 75%
→
Sat0%
Partly cloudy Partly cloudy
79
83
A
Sun0%
Mostly cloudy; hot Mostly cloudy; hot
78
90
C
Mon30%
Partly cloudy; hot Partly cloudy; hot
79
90
A
Tue80%
Showers likely; hot Showers likely; hot
78
90
A
Wed80%
Showers likely Showers likely
77
89
A
Thu50%
Chance of showers; hot Chance of showers; hot
77
90
A
Fri50%
Chance of showers; hot Chance of showers; hot
77
90
A
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
THIS WEEK IN 1983 · NOV. 12, 1983

93°, the hottest this week of the year has been since 1898.

2

What San Juan stands on

San Juan’s center stands about 40 ft above sea level. Within three miles the land runs from 0 ft to 280 ft, a difference of 280 ft: rolling country. The highest named summit within 15 miles is Cerro La Tiza, about 2,140 ft, 14 miles southwest.

San Juan, southwest to northeast San Juan40 ftCerro Marquesa1,640 ftCerro Magueyes560 ft ← SWNE → 24 miles through the town center; vertical exaggeration about 25×.
Elevation, center40 ft
Within 3 miles0 to 280 ft
Lie of the landRolling (280 ft of relief)
High point nearbyCerro La Tiza, 2,140 ft, 14 mi southwest
5

San Juan’s year

San Juan has a tropical monsoon climate. Summer afternoons average 89° in June; winter nights fall to about 72° in January. About 60 inches of rain fall in a normal year.

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 1 59.9 in
June, average89° / 77° · high / low, the warmest month
January, average83° / 72° · high / low, the coldest month
Rain a year59.9 in · wettest months: November and September
Hottest on record98°F · October 9, 1981
Coldest on record60°F · March 3, 1957
Wettest day on record9.67 in · August 15, 1944
90° days a year72 · none reach 100°
Climate typeTropical monsoon · Köppen Am
1Wettest stretch · September through November: 19.1 of the year’s 59.9 inches
NOVEMBER 14 IN THE RECORD

On November 14 San Juan normally reaches 86° and falls to 75°. The record high is 92°, in 1981; the record low 68°, in 1961. The most rain on this date, 1.54 in, fell in 1948.

Normals 1991–2020 and records since 1898 from the San Juan Area threaded record (San Juan L M Marin International Airport, 4 miles east-northeast). NOAA, through RCC-ACIS.