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

Río Blanco

1,505 people, 60 ft above sea level in Naguabo Municipio.

60 ftElevation, city center
1,505People, 2024 estimate
1 sq miLand area
Sunny 90°
Sunny now Dew point 74° · SSE 13 mph · high 89°
City of Río Blanco River Interstate 2 miles
Explore the plate Order a print

The Río Blanco 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 Río Blanco

NWS forecast and National Blend of Models · updated 2:00 PM AST
RIGHT NOW Luis Munoz Marin International Airport (TJSJ) · 3:56 PM
Sunny
90° Sunny Feels like 99° · high of 89° near 4 PM
WindSSE 13 mphgusts 22
Humidity59%rising to 85% by morning
Pressure29.94 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 74° · Oppressiveabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Showers
Tonight, around midnightin about 8 hours · 31% chance · showers
LIKELY AMOUNT—amounts come within 3 days
LAST RAINNov. 90.06 in · 5 dry days
ALERTS & OUTLOOKS
! Heat AdvisoryHeat Advisory issued November 14 at 9:51AM AST until November 14 at 5:00PM AST by NWS San Juan PR
NWS San Juan and the Storm Prediction Center · checked 4:17 PM
SUN & MOON
↑ 6:28 AM5:46 PM ↓
11 h 17 m of daylight, 1 minute less than yesterday
Waxing crescent, 25% lit. Next full moon: Nov. 24.
AIR & POLLEN
64
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
4p
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
1p
mostly sunny
partly cloudy night
partly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy day
mostly cloudy day
mostly cloudy day
mostly cloudy day
partly cloudy night
partly cloudy night
partly cloudy night
mostly cloudy night
partly cloudy day
showers day
showers day
showers day
showers night
partly cloudy night
partly cloudy night
showers night
showers day
showers day
showers day
TEMPERATURE °F
89°
79°
90°
78°
88°
80°
CHANCE OF RAIN
75% · 0.07 in Tuesday afternoon 50%
WIND, MPH
13
9
8
8
7
7
9
10
10
7
6
5
5
5
10
12
12
9
8
8
8
9
12
12
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 Mostly sunny Mostly sunny
89° 79°
0% rain — SSE 13 A
SUN Nov. 15 Chance of showers; hot Chance of showers; hot
90° 78°
30% rain — SE 9 C
MON Nov. 16 Chance of showers; hot Chance of showers; hot
90° 79°
50% rain — E 10 A
TUE Nov. 17 Showers likely Showers likely
89° 78°
80% rain up to 0.1″ 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 0.06″ ESE 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 Río Blanco about 5,000 feet above the ground was over the tropical Atlantic three days ago, about 910 miles back along its path. It came down from about 9,700 feet up, warming and drying as it sank. 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

8.74 inches of rain fell in two days, the most for this week of the year since records began in 1931. The next wettest, 4.10 inches, fell in 2020.

4.10″
8.74″
20202003
Source: NOAA RCC-ACIS, the Juncos 1 SE record since 1931.
MILE2
THE GROUND

What Río Blanco stands on

Río Blanco’s center stands about 60 ft above sea level. Within three miles the land runs from 10 ft to 2,020 ft, a difference of 2,010 ft: mountain country. The highest named summit within 15 miles is El Toro, about 3,450 ft, 5 miles northwest.

Río Blanco, cut in half from south to north

A section south to north, 24 miles through the town center
0 ft1,000 ft2,000 ft3,000 ft RÍO BLANCO60 ftPunta Santiago10 ftLa Mina2,990 ftEl Cacique3,230 ftLa Dolores100 ft ← SLa Dolores · N →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 6×.

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

Río Blanco’s year

1991–2020 normals · records since 1931 · Juncos 1 SE, 8 mi west

Río Blanco has a tropical rainforest climate. Summer afternoons average 88° in June; winter nights fall to about 65° in January. About 68 inches of rain fall in a normal year.

82°65°83°65°84°65°85°68°86°71°88°72°88°72°88°72°88°72°87°71°85°69°83°66° JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 1 TODAY RÍO BLANCO 67.5 in rain a year
Normal high to low, by month Record high to low, by day Rain by month
June, average88° / 72°high / low, the warmest month
January, average82° / 65°high / low, the coldest month
Rain a year67.5 inwettest months: September and November
Hottest on record100°FJuly 16, 1954
Coldest on record43°FDecember 12, 1991
Wettest day on record15.1 inSeptember 19, 2022
90° days a year103none reach 100°
Climate typeTropical rainforestKöppen Af

AROUND THE RING

1Wettest stretchSeptember through November: 24.0 of the year’s 67.5 inches
NOVEMBER 14 IN THE RECORD

On November 14 Río Blanco normally reaches 85° and falls to 69°. The record high is 93°, in 1952; the record low 57°, in 1944. The most rain on this date, 2.81 in, fell in 2003.

MONTH BY MONTH
JanFebMarAprMayJunJulAugSepOctNovDec
Normal high82°83°84°85°86°88°88°88°88°87°85°83°
Normal low65°65°65°68°71°72°72°72°72°71°69°66°
Rain, inches3.272.482.864.786.395.247.047.228.737.607.694.17
Record high96° (1951)95° (1954)94° (2010)96° (2024)97° (1939)96° (1999)100° (1954)98° (1954)99° (1954)97° (1954)96° (1981)98° (1947)
Record low50° (1980)50° (1949)50° (1981)50° (1981)50° (1950)58° (1981)57° (1936)58° (1933)56° (1981)55° (1944)51° (1959)43° (1991)

Normals 1991–2020 and records since 1931 at Juncos 1 SE, 8 miles west, 150 ft higher. NOAA, through RCC-ACIS.
MILE7
ON THE NETWORK

Around Río Blanco on the Forecast Network

Neighboring plates

San Juan PR · 22 MI 22 miles northwest Bayamón PR · 27 MI 27 miles northwest Ponce PR · 57 MI 57 miles west Mayagüez PR · 89 MI 89 miles west
FORECASTCITY
Map of Río Blanco, Puerto Rico. Explore the plate
PUERTO RICO · NAGUABO

Río Blanco

1,505 people, 60 ft above sea level in Naguabo Municipio.

60 ftElevation
1,505People
1 sq miLand
Sunny 90°
SunnyDew point 74°
1

Today in Río Blanco

NEXT 15 HOURS
Now mostly sunny 89° 0%
7p partly cloudy night 83° 0%
10p partly cloudy night 82° 0%
1a rain 81° 31%
4a mostly cloudy night 80° 0%
7a mostly cloudy day 79° 0%
Showers
NEXT RAINTonight around midnight · 31%
→
Sat0%
Mostly sunny Mostly sunny
79
89
A
Sun30%
Chance of showers; hot Chance of showers; hot
78
90
C
Mon50%
Chance of showers; hot Chance of showers; hot
79
90
A
Tue80%
Showers likely Showers likely
78
89
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 2003 · NOV. 13–14, 2003

8.74 inches in two days, the most for this week since 1931.

2

What Río Blanco stands on

Río Blanco’s center stands about 60 ft above sea level. Within three miles the land runs from 10 ft to 2,020 ft, a difference of 2,010 ft: mountain country. The highest named summit within 15 miles is El Toro, about 3,450 ft, 5 miles northwest.

Río Blanco, south to north Río Blanco60 ftEl Cacique3,230 ft ← SN → 24 miles through the town center; vertical exaggeration about 12×.
Elevation, center60 ft
Within 3 miles10 to 2,020 ft
Lie of the landMountainous (2,010 ft of relief)
High point nearbyEl Toro, 3,450 ft, 5 mi northwest
5

Río Blanco’s year

Río Blanco has a tropical rainforest climate. Summer afternoons average 88° in June; winter nights fall to about 65° in January. About 68 inches of rain fall in a normal year.

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 1 67.5 in
June, average88° / 72° · high / low, the warmest month
January, average82° / 65° · high / low, the coldest month
Rain a year67.5 in · wettest months: September and November
Hottest on record100°F · July 16, 1954
Coldest on record43°F · December 12, 1991
Wettest day on record15.1 in · September 19, 2022
90° days a year103 · none reach 100°
Climate typeTropical rainforest · Köppen Af
1Wettest stretch · September through November: 24.0 of the year’s 67.5 inches
NOVEMBER 14 IN THE RECORD

On November 14 Río Blanco normally reaches 85° and falls to 69°. The record high is 93°, in 1952; the record low 57°, in 1944. The most rain on this date, 2.81 in, fell in 2003.

Normals 1991–2020 and records since 1931 at Juncos 1 SE, 8 miles west, 150 ft higher. NOAA, through RCC-ACIS.