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Shaded-relief map of Los Llanos, Puerto Rico: rivers, roads, the city limits and where the water drains.
PUERTO RICO · COAMO MUNICIPIO

Los Llanos

1,814 people, 480 ft above sea level in Coamo Municipio.

480 ftElevation, city center
1,814People, 2024 estimate
1 sq miLand area
Clear 82°
Clear now Dew point 77° · ENE 5 mph · high 81°
City of Los Llanos River Interstate 2 miles
Explore the plate Order a print

The Los Llanos 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 Los Llanos

NWS forecast and National Blend of Models · updated 8:00 PM AST
RIGHT NOW Mercedita Airport (TJPS) · 9:35 PM
Clear
82° Clear Feels like 91° · high of 81° near 9 PM
WindENE 5 mphno gusts
Humidity84%rising to 88% by morning
Pressure30.01 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 77° · Oppressive69° by Tuesday: drier air arrives
DryComfortableStickyMuggyOppressive
NEXT RAIN
Partly cloudy
Tuesday, about 9 AMin about 59 hours · 48% chance · showers
LIKELY AMOUNT0–0 inmost likely 0; 1 in 10 over 0.03
LAST RAINNov. 140.08 in · 0 dry days
ALERTS & OUTLOOKS
No watches or warnings for Coamo Municipio
NWS San Juan and the Storm Prediction Center · checked 9:47 PM
SUN & MOON
↑ 6:31 AM5:49 PM ↓
11 h 18 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
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
partly cloudy night
partly cloudy night
mostly cloudy night
mostly cloudy day
mostly cloudy day
mostly cloudy day
mostly cloudy day
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
partly cloudy day
partly cloudy day
partly cloudy day
mostly cloudy day
mostly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy day
showers day
showers day
showers day
showers night
TEMPERATURE °F
81°
78°
89°
75°
90°
75°
90°
CHANCE OF RAIN
48% · 0.06 in Tuesday afternoon 50%
WIND, MPH
9
9
8
8
10
10
9
7
6
6
6
6
7
10
9
7
7
7
7
7
8
10
10
8
HOW IT FEELS · DEW POINT
Oppressive: dew points 69 to 76°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 80° / 62°
SAT Nov. 14 Partly cloudy Partly cloudy
81° 77°
0% rain — ESE 9 A
SUN Nov. 15 Mostly cloudy; warmer Mostly cloudy; warmer
89° 75°
20% rain — ESE 9 A
MON Nov. 16 Partly cloudy; hot Partly cloudy; hot
91° 75°
30% rain — ESE 8 A
TUE Nov. 17 Showers likely; hot Showers likely; hot
91° 77°
60% rain — ENE 8 A
WED Nov. 18 Storms likely; hot Storms likely; hot
90° 75°
60% rain up to 0.05″ E 7 A
THU Nov. 19 Chance of showers Chance of showers
89° 76°
50% rain — E 8 A
FRI Nov. 20 Chance of showers Chance of showers
89° 76°
30% rain — E 7 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 Los Llanos about 5,000 feet above the ground was over the tropical Atlantic three days ago, and over the Caribbean a day ago, about 870 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 2003 Nov. 13–14, 2003

The wettest two days this week has seen

8.90 inches of rain fell in two days, the most for this week of the year since records began in 1898. The next wettest, 7.00 inches, fell in 1909.

7.00″
8.90″
19092003
Source: NOAA RCC-ACIS, the Ponce 4 E record since 1898.
MILE2
THE GROUND

What Los Llanos stands on

Los Llanos’s center stands about 480 ft above sea level. Within three miles the land runs from 170 ft to 1,150 ft, a difference of 980 ft: steep hill country. The highest named summit within 15 miles is Cerro de Punta, about 4,330 ft, 14 miles west-northwest.

Los Llanos, cut in half from northwest to southeast

A section northwest to southeast, 24 miles through the town center
0 ft1,000 ft2,000 ft3,000 ft LOS LLANOS480 ftCerro Rosa4,090 ftVillalba720 ftRío Coamoabout 200 ftParcelas Peñuelas140 ft ← NWPlayita · SE →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 5×.

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

Los Llanos’s year

1991–2020 normals · records since 1898 · Ponce 4 E, 8 mi west-southwest

Los Llanos has a tropical savanna climate. Summer afternoons average 92° in July; winter nights fall to about 62° in January. About 38 inches of rain fall in a normal year.

88°62°88°62°88°62°89°65°89°67°91°69°92°69°92°69°91°69°91°68°90°66°88°63° JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 12 TODAY LOS LLANOS 37.5 in rain a year
Normal high to low, by month Record high to low, by day Rain by month
July, average92° / 69°high / low, the warmest month
January, average88° / 62°high / low, the coldest month
Rain a year37.5 inwettest months: September and October
Hottest on record100°FSeptember 7, 2021
Coldest on record49°FJanuary 24, 1993
Wettest day on record12.9 inSeptember 18, 2000
90° days a year197none reach 100°
Climate typeTropical savannaKöppen Aw

AROUND THE RING

1Highs of 90° and upMay 18 to Nov. 23; normal highs reach 90°
2Wettest stretchAugust through October: 16.9 of the year’s 37.5 inches
NOVEMBER 14 IN THE RECORD

On November 14 Los Llanos normally reaches 90° and falls to 66°. The record high is 96°, in 2013; the record low 64°, in 1929. The most rain on this date, 5.35 in, fell in 2003.

MONTH BY MONTH
JanFebMarAprMayJunJulAugSepOctNovDec
Normal high88°88°88°89°89°91°92°92°91°91°90°88°
Normal low62°62°62°65°67°69°69°69°69°68°66°63°
Rain, inches0.731.211.872.264.182.162.844.566.945.383.941.45
Record high98° (2019)95° (1948)96° (2016)96° (1996)96° (1998)99° (1993)100° (2019)100° (2003)100° (2021)98° (1944)100° (2016)98° (2016)
Record low49° (1993)51° (2004)50° (2008)53° (1995)55° (2013)60° (2017)58° (2012)60° (2010)58° (1984)61° (2009)56° (1969)52° (2004)

Normals 1991–2020 and records since 1898 at Ponce 4 E, 8 miles west-southwest, 410 ft lower. NOAA, through RCC-ACIS.

MILE7
ON THE NETWORK

Around Los Llanos on the Forecast Network

Neighboring plates

Bayamón PR · 27 MI 27 miles northeast San Juan PR · 33 MI 33 miles northeast Mayagüez PR · 49 MI 49 miles west
FORECASTCITY
Map of Los Llanos, Puerto Rico. Explore the plate
PUERTO RICO · COAMO

Los Llanos

1,814 people, 480 ft above sea level in Coamo Municipio.

480 ftElevation
1,814People
1 sq miLand
Clear 82°
ClearDew point 77°
1

Today in Los Llanos

NEXT 15 HOURS
Now partly cloudy night 81° 1%
12a mostly cloudy night 80° 0%
3a mostly cloudy night 79° 0%
6a mostly cloudy night 78° 0%
9a mostly cloudy day 84° 0%
12p mostly cloudy day 89° 0%
Partly cloudy
NEXT RAINTuesday about 9 AM · 48%
→
Sat0%
Partly cloudy Partly cloudy
77
81
A
Sun20%
Mostly cloudy; warmer Mostly cloudy; warmer
75
89
A
Mon30%
Partly cloudy; hot Partly cloudy; hot
75
91
A
Tue60%
Showers likely; hot Showers likely; hot
77
91
A
Wed60%
Storms likely; hot Storms likely; hot
75
90
A
Thu50%
Chance of showers Chance of showers
76
89
A
Fri30%
Chance of showers Chance of showers
76
89
A
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
THIS WEEK IN 2003 · NOV. 13–14, 2003

8.90 inches in two days, the most for this week since 1898.

2

What Los Llanos stands on

Los Llanos’s center stands about 480 ft above sea level. Within three miles the land runs from 170 ft to 1,150 ft, a difference of 980 ft: steep hill country. The highest named summit within 15 miles is Cerro de Punta, about 4,330 ft, 14 miles west-northwest.

Los Llanos, northwest to southeast Los Llanos480 ftRío Coamoabout 200 ft ← NWSE → 24 miles through the town center; vertical exaggeration about 9×.
Elevation, center480 ft
Within 3 miles170 to 1,150 ft
Lie of the landSteep hill country (980 ft of relief)
High point nearbyCerro de Punta, 4,330 ft, 14 mi west-northwest
5

Los Llanos’s year

Los Llanos has a tropical savanna climate. Summer afternoons average 92° in July; winter nights fall to about 62° in January. About 38 inches of rain fall in a normal year.

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 12 37.5 in
July, average92° / 69° · high / low, the warmest month
January, average88° / 62° · high / low, the coldest month
Rain a year37.5 in · wettest months: September and October
Hottest on record100°F · September 7, 2021
Coldest on record49°F · January 24, 1993
Wettest day on record12.9 in · September 18, 2000
90° days a year197 · none reach 100°
Climate typeTropical savanna · Köppen Aw
1Highs of 90° and up · May 18 to Nov. 23; normal highs reach 90°
2Wettest stretch · August through October: 16.9 of the year’s 37.5 inches
NOVEMBER 14 IN THE RECORD

On November 14 Los Llanos normally reaches 90° and falls to 66°. The record high is 96°, in 2013; the record low 64°, in 1929. The most rain on this date, 5.35 in, fell in 2003.

Normals 1991–2020 and records since 1898 at Ponce 4 E, 8 miles west-southwest, 410 ft lower. NOAA, through RCC-ACIS.