San Juan Municipio weather, town by town
2 places in San Juan 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 1956 to 2026. Station extremes, not official state records.
San Juan Municipio Weather Facts
San Juan Municipio has 2 places on myweatherrock (2 place), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 98°F at San Juan L M Marin Intl Ap on October 9, 1981. The coldest night is 60°F at San Juan L M Marin Intl Ap on March 3, 1957. The wettest day brought 9.23 inches of rain at San Juan L M Marin Intl Ap on July 18, 2013. The biggest single-day snow measured 0 inches at San Juan L M Marin Intl Ap on January 1, 1956. Those are station measurements from NOAA's daily records, 1956 to 2026, not official state records. By area the largest place is San Juan, about 40 square miles.
About San Juan Municipio weather
The map on the Now tab shows every San Juan 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 2 San Juan Municipio towns with station normals, the warmest month is June, when the day usually reaches 89°F, and the coldest is January, when the night usually falls to 72°F. November is the wettest, with rain on about 21 days.
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 Juan Municipio weather records
Measured at the NOAA stations serving these towns, daily records 1956 to 2026. Station extremes, not official state records.
Common questions about San Juan Municipio weather
- What is the hottest temperature recorded at a San Juan Municipio station?
- 98°F at San Juan L M Marin Intl Ap on October 9, 1981, in the NOAA daily station records myweatherrock holds (1956 to 2026).
- What is the coldest temperature recorded at a San Juan Municipio station?
- 60°F at San Juan L M Marin Intl Ap on March 3, 1957.
- What is the most rain a San Juan Municipio station has measured in one day?
- 9.23 inches at San Juan L M Marin Intl Ap on July 18, 2013.
- What is the biggest one-day snowfall at a San Juan Municipio station?
- 0 inches at San Juan L M Marin Intl Ap on January 1, 1956.
- How many San Juan Municipio towns have a weather page here?
- 2: 2 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 Juan 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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