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San Sebastián, Puerto Rico

Town in San Sebastián Municipio, Puerto Rico

Air quality

The air at San Sebastián

Index 27, good, led by fine particles. Read at 11 PM from its reporting area, Catano (PR), 56 miles off.

27Good
  • Fine particles (PM2.5)27Good-

The days ahead

Yesterday measured 46, good.

On the radar over San Sebastián, Puerto RicoReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 5 instruments nearest San Sebastián, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.1 miles away.

measured now3 instruments

MiraderoS2232

At a soil climate station/12.5 mi away/155 ft/57 ft below here

temp, humidity, soil temp, soil moisture

Rank-

AguadillaTJBQ

At an airfield/14.2 mi away/236 ft/24 ft above here

temp, wind, gust, visibility, precip, pressure

Rank230of 243

measured daily2 instruments

San Sebastian 2.2 NNWPR-SS-2

In a volunteer observer's own ground/2.5 mi away/580 ft/368 ft above here

precip, snowfall, snow depth

Rank-

Guajataca DamQBRP4

At a dam/6.3 mi away/674 ft/462 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at San Sebastian 1N - RAWS, drawn

The nearest instrument reporting now, 1.1 mi from San Sebastián, Puerto Rico. From its report of Oct 16, 2026, 12:12 AM local time: 3 of its 5 sheets.

The air

76.0 F with a dew point of 74.4 F, 95 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 400 ft up.

Chart of the air at San Sebastian 1N - RAWS: temperature 76.0 degrees Fahrenheit and dew point 74.4, 95 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SSBP4FIG. B THE AIR AT SAN SEBASTIAN 1N - RAWSTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00060 F70 F80 F90 FSATURATES 400 FT ABOVE THE STATION, AT 74.0 FTEMPERATURE AND DEW POINT 76.0 F, 74.4 FRELATIVE HUMIDITY 95 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLESan Sebastian 1N - RAWS, the airSTATION REPORT · DCP SSBP4TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-SSBP4-1DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southeast (167 degrees) at 1 mph, gusting 4 mph: force 1, a light air on the Beaufort scale. The strongest gust today was 4 mph.

Plan of the wind at San Sebastian 1N - RAWS, north up: blowing from 167 degrees, the south southeast, at 1 miles an hour, gusting 4; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SSBP4FIG. C THE WIND AT SAN SEBASTIAN 1N - RAWSPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 167°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 1 MPH2LIGHT BREEZE4GUST, 4 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESan Sebastian 1N - RAWS, the windSTATION REPORT · DCP SSBP4TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-SSBP4-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 525 ft above sea level, 2 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.36 inHg and the temperature at 57.1 F; it reports 76.0 F, 18.9 F warmer than standard.

Section from sea level of where San Sebastian 1N - RAWS stands in the atmosphere, height to scale: the station 525 feet above sea level with 2 per cent of the air below it; the standard atmosphere's pressure there, 29.36 inches of mercury, and temperature, 57.1 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SSBP4FIG. D WHERE SAN SEBASTIAN 1N - RAWS STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHERESAN SEBASTIAN 1N - RAWS2 PER CENT OF THE AIR BELOW IT525 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE29.36 inHgSTANDARD TEMPERATURE HERE57.1 FTEMPERATURE, REPORTED76.0 FTITLESan Sebastian 1N - RAWS, the columnSTATION REPORT · DCP SSBP4TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-SSBP4-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of San Sebastian 1N - RAWS, in 5 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Near San Sebastián

The nearest places, each with its own forecast and the instruments nearest it.

Near San Sebastián

River and lake gauges