San Sebastián Municipio weather, town by town
3 places in San Sebastián Municipio, Puerto Rico, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
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Measured at the NOAA stations serving these towns, daily records 1901 to 2026. Station extremes, not official state records.
San Sebastián Municipio Weather Facts
San Sebastián Municipio has 3 places on myweatherrock (3 place), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 99°F at Isabela Substn on June 10, 1916. The coldest night is 45°F at Arecibo Obsy on January 10, 1999. The wettest day brought 7.55 inches of rain at Guajataca Dam on May 14, 1995. The biggest single-day snow measured 0 inches at Aguadilla 5.5 Nne on October 17, 1998. Those are station measurements from NOAA's daily records, 1901 to 2026, not official state records. By area the largest place is San Sebastián, about 2 square miles.
About San Sebastián Municipio weather
The map on the Now tab shows every San Sebastián Municipio town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 3 San Sebastián Municipio towns with station normals, the warmest month is August, when the day usually reaches 88°F, and the coldest is January, when the night usually falls to 65°F. August is the wettest, with rain on about 16 days. January nights run from about 62°F in Juncal to 67°F in Hato Arriba.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
- Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
- Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
- Warnings and alerts: the National Weather Service, passed through unchanged.
San Sebastián Municipio weather records
Measured at the NOAA stations serving these towns, daily records 1901 to 2026. Station extremes, not official state records.
Common questions about San Sebastián Municipio weather
- What is the hottest temperature recorded at a San Sebastián Municipio station?
- 99°F at Isabela Substn on June 10, 1916, in the NOAA daily station records myweatherrock holds (1901 to 2026).
- What is the coldest temperature recorded at a San Sebastián Municipio station?
- 45°F at Arecibo Obsy on January 10, 1999.
- What is the most rain a San Sebastián Municipio station has measured in one day?
- 7.55 inches at Guajataca Dam on May 14, 1995.
- What is the biggest one-day snowfall at a San Sebastián Municipio station?
- 0 inches at Aguadilla 5.5 Nne on October 17, 1998.
- How many San Sebastián Municipio towns have a weather page here?
- 3: 3 place. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
- Where does the San Sebastián Municipio forecast come from?
- NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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