National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Early Heat Wave in the West; Fire Concerns in the Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Elevated to critical fire weather conditions are expected today across the High Plains and southern Plains. Lake effect snow downwind of the Great Lakes will taper off today. Read More >

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Partly Cloudy

81°F

27°C

Humidity 62%
Wind Speed E 16 mph
Barometer 30.01 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 17 Mar 5:56 pm AST
Extended Forecast for

3 Miles NE Comerio PR

  • Tonight

    Tonight: Scattered showers, mainly after 3am. Partly cloudy, with a low around 66. East southeast wind 5 to 10 mph becoming light east after midnight. Chance of precipitation is 30%.

    Low: 66 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Scattered showers before 9am, then isolated showers after noon. Mostly sunny, with a high near 78. East wind 6 to 13 mph. Chance of precipitation is 40%.

    High: 78 °F

    Scattered
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66. East wind around 5 mph becoming calm in the evening.

    Low: 66 °F

    Mostly Clear

  • Thursday

    Thursday: Scattered showers. Partly sunny, with a high near 78. East southeast wind 6 to 11 mph. Chance of precipitation is 50%.

    High: 78 °F

    Scattered
    Showers

  • Thursday Night

    Thursday Night: Isolated showers. Partly cloudy, with a low around 65. Southeast wind 3 to 5 mph. Chance of precipitation is 20%.

    Low: 65 °F

    Isolated
    Showers

  • Friday

    Friday: Scattered showers. Partly sunny, with a high near 79. South southeast wind 5 to 11 mph. Chance of precipitation is 50%.

    High: 79 °F

    Scattered
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 66. Light south wind.

    Low: 66 °F

    Partly Cloudy

  • Saturday

    Saturday: Showers likely, mainly after noon. Partly sunny, with a high near 78. Calm wind. Chance of precipitation is 70%.

    High: 78 °F

    Mostly Sunny
    then Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely. Cloudy, with a low around 65. Calm wind. Chance of precipitation is 70%.

    Low: 65 °F

    Showers
    Likely

Detailed Forecast

Tonight
Scattered showers, mainly after 3am. Partly cloudy, with a low around 66. East southeast wind 5 to 10 mph becoming light east after midnight. Chance of precipitation is 30%.
Wednesday
Scattered showers before 9am, then isolated showers after noon. Mostly sunny, with a high near 78. East wind 6 to 13 mph. Chance of precipitation is 40%.
Wednesday Night
Mostly clear, with a low around 66. East wind around 5 mph becoming calm in the evening.
Thursday
Scattered showers. Partly sunny, with a high near 78. East southeast wind 6 to 11 mph. Chance of precipitation is 50%.
Thursday Night
Isolated showers. Partly cloudy, with a low around 65. Southeast wind 3 to 5 mph. Chance of precipitation is 20%.
Friday
Scattered showers. Partly sunny, with a high near 79. South southeast wind 5 to 11 mph. Chance of precipitation is 50%.
Friday Night
Partly cloudy, with a low around 66. Light south wind.
Saturday
Showers likely, mainly after noon. Partly sunny, with a high near 78. Calm wind. Chance of precipitation is 70%.
Saturday Night
Showers likely. Cloudy, with a low around 65. Calm wind. Chance of precipitation is 70%.
Sunday
Showers likely, mainly after noon. Mostly cloudy, with a high near 76. Chance of precipitation is 70%.
Sunday Night
Scattered showers. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
Monday
Scattered showers. Mostly sunny, with a high near 77. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Comerio PR
 18.24°N 66.2°W (Elev. 1650 ft)
Last Update:
4:43 pm AST Mar 17, 2026
Forecast Valid:
6pm AST Mar 17, 2026-6pm AST Mar 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation