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San Ysidro, CA Weather Forecast

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San Ysidro, CA Weather Forecast

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San Ysidro CA weather - Clear - 59°F
Clear
59°F
Updated 6:55 am
Feels Like 56°F
Humidity 86%
Wind ENE 3 mph
Barometer  29.96 in
Dew Point 55°F
San Ysidro CA weather - Clear - 15°C
Clear
15°C
Updated 6:55 am
Feels Like 13°C
Humidity 86%
Wind ENE 5 km/h
Barometer  101.4 kPa
Dew Point 13°C
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San Ysidro Weather Forecast

TODAY TONIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT LABOR DAY MONDAY NIGHT TUESDAY TUESDAY NIGHT
San Ysidro, CA Weather - Today Mostly Sunny San Ysidro, CA Weather - Tonight Patchy Fog San Ysidro, CA Weather - Friday Mostly Sunny San Ysidro, CA Weather - Friday Night Partly Cloudy San Ysidro, CA Weather - Saturday Patchy Fog San Ysidro, CA Weather - Saturday Night Chance Of Showers San Ysidro, CA Weather - Sunday Chance Of Showers San Ysidro, CA Weather - Sunday Night Chance Of Showers San Ysidro, CA Weather - Labor Day Chance Of Showers San Ysidro, CA Weather - Monday Night Partly Cloudy San Ysidro, CA Weather - Tuesday Chance Of Showers San Ysidro, CA Weather - Tuesday Night Partly Cloudy
Mostly Sunny Patchy Fog Mostly Sunny Partly Cloudy Patchy Fog Chance of Showers Chance of Showers Chance of Showers Chance of Showers Partly Cloudy Chance of Showers Partly Cloudy
Hi: 81°FHi: 27°C
 Lo: 62°FLo: 17°C Hi: 80°FHi: 27°C
 Lo: 64°FLo: 18°C Hi: 84°FHi: 29°C
 Lo: 70°FLo: 21°C Hi: 85°FHi: 29°C
 Lo: 68°FLo: 20°C Hi: 85°FHi: 29°C
 Lo: 68°FLo: 20°C Hi: 85°FHi: 29°C
 Lo: 68°FLo: 20°C
POP = Probability of Precipitation.
Weather Outlook Updated: 1246 AM PDT Thu Sep 03 2026 San Ysidro, CA Weather - WeatherWorld.com

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San Ysidro Forecast Discussion

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Issued: 500 AM PDT Thu Sep 3 2026

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...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...

.SHORT TERM (Today through Saturday)... Cooler and drier conditions will continue for inland areas through Friday with high temperatures as much as 5 to 10 degrees below average for the mountains and inland valleys. High temperatures through Friday will range from the mid 70s near the coast to the mid 80s to lower 90s for the Inland Empire with the lower d...