7-Day Forecast Summary
7-Day Detailed Weather Forecast for Lake San Marcos
This Afternoon |
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Temperature: 78°F Wind Speed: 10 mph Wind Direction: W Forecast: Sunny, with a high near 78. West wind around 10 mph, with gusts as high as 20 mph. |
Tonight |
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Temperature: 60°F Wind Speed: 0 to 10 mph Wind Direction: S Forecast: Mostly clear, with a low around 60. South wind 0 to 10 mph. |
Friday |
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Temperature: 78°F Wind Speed: 0 to 10 mph Wind Direction: SW Forecast: Sunny, with a high near 78. Southwest wind 0 to 10 mph. |
Friday Night |
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Temperature: 63°F Wind Speed: 0 to 5 mph Wind Direction: NW Forecast: Partly cloudy, with a low around 63. Northwest wind 0 to 5 mph. |
Saturday |
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Temperature: 81°F Wind Speed: 0 to 10 mph Wind Direction: W Forecast: A slight chance of rain showers after 11am. Mostly sunny, with a high near 81. West wind 0 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible. |
Saturday Night |
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Temperature: 68°F Wind Speed: 5 mph Wind Direction: NW Forecast: A chance of rain showers. Mostly cloudy, with a low around 68. Chance of precipitation is 40%. |
Sunday |
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Temperature: 82°F Wind Speed: 5 to 10 mph Wind Direction: NW Forecast: A chance of rain showers before 5pm. Partly sunny, with a high near 82. |
Sunday Night |
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Temperature: 67°F Wind Speed: 0 to 10 mph Wind Direction: NW Forecast: Partly cloudy, with a low around 67. |
Labor Day |
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Temperature: 83°F Wind Speed: 0 to 10 mph Wind Direction: NW Forecast: Mostly sunny, with a high near 83. |
Monday Night |
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Temperature: 67°F Wind Speed: 0 to 10 mph Wind Direction: NW Forecast: Partly cloudy, with a low around 67. |
Tuesday |
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Temperature: 84°F Wind Speed: 0 to 10 mph Wind Direction: NW Forecast: Mostly sunny, with a high near 84. |
Tuesday Night |
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Temperature: 67°F Wind Speed: 0 to 10 mph Wind Direction: N Forecast: Partly cloudy, with a low around 67. |
Wednesday |
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Temperature: 84°F Wind Speed: 0 to 10 mph Wind Direction: W Forecast: Sunny, with a high near 84. |
Wednesday Night |
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Temperature: 68°F Wind Speed: 0 to 5 mph Wind Direction: W Forecast: Mostly clear, with a low around 68. |

