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

Palmas

1,568 people, 190 ft above sea level in Arroyo Municipio.

190 ftElevation, city center
1,568People, 2024 estimate
1 sq miLand area
Sunny 88°
Sunny now Dew point -26° · SE 13 mph · high 85°
City of Palmas River Interstate 2 miles
Explore the plate Order a print

The Palmas 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 Palmas

NWS forecast and National Blend of Models · updated 4:00 PM AST
RIGHT NOW Mercedita Airport (TJPS) · 4:55 PM
Sunny
88° Sunny Feels like 85° · high of 85° near 5 PM
WindSE 13 mphno gusts
Humidity1%rising to 91% by morning
Pressure29.94 in →steady
Visibility8 mihazy
CloudsClear
UV index—no forecast
Dew point -26° · Dry78° by Saturday: more humid
DryComfortableStickyMuggyOppressive
NEXT RAIN
Showers
Tuesday, about 3 PMin about 70 hours · 43% chance · showers
LIKELY AMOUNT0–0 inmost likely 0; 1 in 10 over 0.04
LAST RAINNov. 70.21 in · 7 dry days
ALERTS & OUTLOOKS
No watches or warnings for Arroyo Municipio
NWS San Juan and the Storm Prediction Center · checked 5:17 PM
SUN & MOON
↑ 6:29 AM5:47 PM ↓
11 h 18 m of daylight, 1 minute less than yesterday
Waxing crescent, 25% lit. Next full moon: Nov. 24.
AIR & POLLEN
52
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
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
2p
partly cloudy night
partly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy day
mostly cloudy day
partly 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
partly cloudy night
partly cloudy night
partly cloudy day
partly cloudy day
showers day
TEMPERATURE °F
85°
77°
89°
74°
90°
76°
CHANCE OF RAIN
43% · 0.00 in Tuesday afternoon 50%
WIND, MPH
8
8
7
7
6
9
10
9
7
5
5
6
6
7
10
10
8
7
7
7
7
8
10
10
HOW IT FEELS · DEW POINT
Oppressive: dew points 71 to 78°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 87° / 70°
SAT Nov. 14 Partly cloudy Partly cloudy
85° 77°
20% rain — SE 10 A
SUN Nov. 15 Mostly cloudy; hot Mostly cloudy; hot
90° 74°
0% rain — ESE 9 A
MON Nov. 16 Partly cloudy; hot Partly cloudy; hot
92° 76°
20% rain — E 9 B
TUE Nov. 17 Chance of showers; hot Chance of showers; hot
92° 76°
40% rain — ENE 9 B
WED Nov. 18 Showers likely; hot Showers likely; hot
91° 75°
60% rain up to 0.07″ E 7 B
THU Nov. 19 Chance of showers; hot Chance of showers; hot
90° 76°
50% rain — E 7 A
FRI Nov. 20 Chance of showers; hot Chance of showers; hot
90° 75°
40% rain — E 5 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 Palmas about 5,000 feet above the ground was over the tropical Atlantic three days ago, about 960 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. 12–13, 2003

The wettest two days this week has seen

11.67 inches of rain fell in two days, the most for this week of the year since records began in 1911. The next wettest, 8.20 inches, fell in 1924.

8.20″
11.67″
19242003
Source: NOAA RCC-ACIS, the Guayama 1 SW record since 1911.
MILE2
THE GROUND

What Palmas stands on

Palmas’s center stands about 190 ft above sea level. Within three miles the land runs from 0 ft to 1,060 ft, a difference of 1,060 ft: steep hill country. Open water lies within three miles. The highest named summit within 15 miles is Cerro La Santa, about 2,940 ft, 9 miles north-northwest.

Palmas, cut in half from south to north

A section south to north, 24 miles through the town center
0 ft1,000 ft2,000 ft PALMAS190 ftYaurel1,330 ftHigh point of the line2,760 ft ← SG. L. García · N →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 7×.

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

Palmas’s year

1991–2020 normals · records since 1911 · Guayama 1 SW, 7 mi west

Palmas has a tropical savanna climate. Summer afternoons average 90° in July; winter nights fall to about 72° in January. About 54 inches of rain fall in a normal year.

85°72°86°72°86°72°87°74°88°76°89°77°90°78°90°77°90°77°89°76°88°75°86°73° JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 12 TODAY PALMAS 54.4 in rain a year
Normal high to low, by month Record high to low, by day Rain by month
July, average90° / 78°high / low, the warmest month
January, average85° / 72°high / low, the coldest month
Rain a year54.4 inwettest months: September and October
Hottest on record99°FAugust 2, 1978
Coldest on record60°FApril 8, 1975
Wettest day on record12.4 inSeptember 5, 1979
90° days a year88none reach 100°
Climate typeTropical savannaKöppen Aw

AROUND THE RING

1Highs of 90° and upJuly 3 to Oct. 11; normal highs reach 90°
2Wettest stretchAugust through October: 21.6 of the year’s 54.4 inches
NOVEMBER 14 IN THE RECORD

On November 14 Palmas normally reaches 88° and falls to 75°. The record high is 94°, in 1953; the record low 68°, in 1946. The most rain on this date, 5.70 in, fell in 1999.

MONTH BY MONTH
JanFebMarAprMayJunJulAugSepOctNovDec
Normal high85°86°86°87°88°89°90°90°90°89°88°86°
Normal low72°72°72°74°76°77°78°77°77°76°75°73°
Rain, inches2.421.701.902.845.264.585.467.087.307.225.852.79
Record high94° (1958)94° (1979)95° (1967)96° (1975)96° (1952)95° (1963)99° (1951)99° (1978)98° (1944)97° (2023)97° (1944)95° (1959)
Record low60° (1951)60° (1974)61° (1979)60° (1975)62° (1935)64° (1923)65° (1958)67° (1956)65° (1955)63° (1956)62° (1974)62° (2010)

Normals 1991–2020 and records since 1911 at Guayama 1 SW, 7 miles west. NOAA, through RCC-ACIS.
MILE7
ON THE NETWORK

Around Palmas on the Forecast Network

Neighboring plates

Bayamón PR · 29 MI 29 miles north San Juan PR · 29 MI 29 miles north Mayagüez PR · 75 MI 75 miles west
FORECASTCITY
Map of Palmas, Puerto Rico. Explore the plate
PUERTO RICO · ARROYO

Palmas

1,568 people, 190 ft above sea level in Arroyo Municipio.

190 ftElevation
1,568People
1 sq miLand
Sunny 88°
SunnyDew point -26°
1

Today in Palmas

NEXT 15 HOURS
Now partly cloudy day 85° 14%
8p partly cloudy night 81° 0%
11p partly cloudy night 80° 0%
2a mostly cloudy night 78° 0%
5a mostly cloudy night 78° 0%
8a mostly cloudy day 82° 0%
Showers
NEXT RAINTuesday about 3 PM · 43%
→
Sat20%
Partly cloudy Partly cloudy
77
85
A
Sun0%
Mostly cloudy; hot Mostly cloudy; hot
74
90
A
Mon20%
Partly cloudy; hot Partly cloudy; hot
76
92
B
Tue40%
Chance of showers; hot Chance of showers; hot
76
92
B
Wed60%
Showers likely; hot Showers likely; hot
75
91
B
Thu50%
Chance of showers; hot Chance of showers; hot
76
90
A
Fri40%
Chance of showers; hot Chance of showers; hot
75
90
A
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
THIS WEEK IN 2003 · NOV. 12–13, 2003

11.67 inches in two days, the most for this week since 1911.

2

What Palmas stands on

Palmas’s center stands about 190 ft above sea level. Within three miles the land runs from 0 ft to 1,060 ft, a difference of 1,060 ft: steep hill country. Open water lies within three miles. The highest named summit within 15 miles is Cerro La Santa, about 2,940 ft, 9 miles north-northwest.

Palmas, south to north Palmas190 ft ← SN → 24 miles through the town center; vertical exaggeration about 13×.
Elevation, center190 ft
Within 3 miles0 to 1,060 ft
Lie of the landSteep hill country (1,060 ft of relief)
High point nearbyCerro La Santa, 2,940 ft, 9 mi north-northwest
5

Palmas’s year

Palmas has a tropical savanna climate. Summer afternoons average 90° in July; winter nights fall to about 72° in January. About 54 inches of rain fall in a normal year.

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 12 54.4 in
July, average90° / 78° · high / low, the warmest month
January, average85° / 72° · high / low, the coldest month
Rain a year54.4 in · wettest months: September and October
Hottest on record99°F · August 2, 1978
Coldest on record60°F · April 8, 1975
Wettest day on record12.4 in · September 5, 1979
90° days a year88 · none reach 100°
Climate typeTropical savanna · Köppen Aw
1Highs of 90° and up · July 3 to Oct. 11; normal highs reach 90°
2Wettest stretch · August through October: 21.6 of the year’s 54.4 inches
NOVEMBER 14 IN THE RECORD

On November 14 Palmas normally reaches 88° and falls to 75°. The record high is 94°, in 1953; the record low 68°, in 1946. The most rain on this date, 5.70 in, fell in 1999.

Normals 1991–2020 and records since 1911 at Guayama 1 SW, 7 miles west. NOAA, through RCC-ACIS.