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Fallbrook, CA Weather Forecast
Fallbrook, CA Weather Forecast Date: 1135 PM PDT Fri Sep 18 2026
The area/counties/county of: San Diego County Valleys, including the cities of: Escondido, El Cajon, San Marcos, La Mesa, Santee, and Poway.or toggle through each period.
Today... Partly cloudy this morning...Becoming sunny. Highs 78 to 83. Light winds becoming west 10 mph this afternoon.
Tonight... Mostly clear in the evening...Becoming partly cloudy. Lows 53 to 60. Areas of winds west to 10 mph in the evening becoming light.
Saturday... Partly cloudy in the morning...Becoming sunny. Highs around 80 in the western valleys to 82 to 87 near the foothills. Light winds becoming west 10 mph in the afternoon.
Saturday Night... Mostly clear in the evening...Becoming partly cloudy. Lows 55 to 61. Areas of winds west to 10 mph in the evening becoming light.
Sunday... Patchy fog in the morning. Partly cloudy. Highs 76 to 79 in the western valleys to 80 to 85 near the foothills. Light winds becoming west 10 mph in the afternoon.
Sunday Night... Partly cloudy in the evening...Becoming mostly cloudy overnight with patchy fog. Lows 55 to 62.
Monday... Mostly cloudy with patchy fog in the morning...Becoming mostly sunny. Highs 76 to 81.
Monday Night... Mostly clear in the evening...Becoming partly cloudy overnight with patchy fog. Lows 53 to 60.
Tuesday... Partly cloudy in the morning...Becoming mostly sunny. Highs 76 to 79 in the western valleys to 78 to 83 near the foothills.
Tuesday Night... Mostly clear. Lows 55 to 61.
Wednesday... Partly cloudy in the morning...Becoming mostly sunny. Highs 81 to 84 in the western valleys to 85 to 90 near the foothills.
Wednesday Night... Mostly clear. Lows 59 to 63.
POP = Probability of Precipitation
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