Weather WorldO'Neill Lake, CA 7-Day Night Weather Forecast
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O'Neill Lake, CA Weather Forecast
O'Neill Lake, CA Weather Forecast Date: 1141 AM PDT Mon Sep 28 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.
Tonight... Mostly clear. Cooler. Lows 52 to 59. Areas of winds west to 10 mph this evening becoming light.
Tuesday... Mostly sunny. Highs 80 to 85. Areas of winds west to 10 mph...Becoming 10 to 15 mph in the afternoon.
Tuesday Night... Mostly clear in the evening...Becoming partly cloudy. Lows 57 to 63. Areas of winds south to 10 mph becoming east overnight.
Wednesday... Partly cloudy in the morning...Becoming sunny. Highs 84 to 89. Light winds becoming west 10 mph in the afternoon.
Wednesday Night... Mostly clear. Lows 59 to 64. Light winds.
Thursday... Mostly sunny. Highs 89 to 94.
Thursday Night... Clear. Lows 63 to 68.
Friday... Mostly sunny. Highs 93 to 98.
Friday Night... Mostly clear. Lows 67 to 71.
Saturday... Mostly sunny. Highs 95 to 99 in the western valleys to 91 to 96 near the foothills.
Saturday Night... Clear. Lows 67 to 73.
Sunday... Mostly sunny. Hot. Highs 96 to 100 in the western valleys to 91 to 96 near the foothills.
Sunday Night... Clear. Lows 69 to 74.
POP = Probability of Precipitation
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