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 San Marcos Weather Forecast Summary |
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Today
May 15th
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Saturday
May 16th
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Sunday
May 17th
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Monday
May 18th
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Tuesday
May 19th
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Mostly Sunny |
Mostly Sunny |
Mostly Sunny |
Mostly Sunny |
Mostly Sunny |
75°F
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71°F
56°F |
72°F
58°F |
77°F
55°F |
79°F
55°F |
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| San Marcos Detailed Weather Forecast |
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| Friday, May 15th, 2026 |
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Morning |
Temperature: 65°F |
| Mostly sunny. |
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Afternoon |
Temperature: 73°F |
| Sunny. Windy at times. |
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Evening |
Temperature: 60°F |
| Clear. |
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| Saturday, May 16th, 2026 |
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Overnight |
Temperature: 57°F |
| A mix of clear and cloudy skies. |
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Morning |
Temperature: 64°F |
| Sunny with cloudy periods. |
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Afternoon |
Temperature: 69°F |
| Sunny. Windy at times. |
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Evening |
Temperature: 59°F |
| A mix of clear and cloudy skies. Windy at times. |
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| Sunday, May 17th, 2026 |
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Overnight |
Temperature: 58°F |
| A mix of cloudy and clear skies. |
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Morning |
Temperature: 63°F |
| Mostly sunny. Windy at times. |
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Afternoon |
Temperature: 70°F |
| Mostly sunny. Windy at times. |
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Evening |
Temperature: 60°F |
| A mix of cloudy and clear skies. Windy at times. |
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| Monday, May 18th, 2026 |
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Overnight |
Temperature: 57°F |
| Mostly clear. |
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Morning |
Temperature: 66°F |
| Sunny. |
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Afternoon |
Temperature: 74°F |
| Sunny. Windy at times. |
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Evening |
Temperature: 60°F |
| Mostly clear. |
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| Tuesday, May 19th, 2026 |
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Overnight |
Temperature: 56°F |
| Mostly clear. |
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Morning |
Temperature: 69°F |
| Sunny. |
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Afternoon |
Temperature: 76°F |
| Mostly sunny. Windy at times. |
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Evening |
Temperature: 63°F |
| Mostly clear. |
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| Wednesday, May 20th, 2026 |
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Overnight |
Temperature: 58°F |
| Mostly clear. |
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Morning |
Temperature: 71°F |
| Mostly sunny. |
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Afternoon |
Temperature: 76°F |
| Mostly sunny. Windy at times. |
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Evening |
Temperature: 64°F |
| Mostly clear. |
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| Thursday, May 21st, 2026 |
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Overnight |
Temperature: 58°F |
| Clear. |
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Morning |
Temperature: 69°F |
| Sunny. |
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Afternoon |
Temperature: 75°F |
| Mostly sunny. Windy at times. |
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Evening |
Temperature: 63°F |
| Mostly clear. |
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| Friday, May 22nd, 2026 |
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Overnight |
Temperature: 59°F |
| A mix of clear and cloudy skies. |
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Morning |
Temperature: 66°F |
| Sunny with cloudy periods. |
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Afternoon |
Temperature: 73°F |
| A mix of sun and cloud. Windy at times. |
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Evening |
Temperature: 62°F |
| A mix of clear and cloudy skies. |
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| Saturday, May 23rd, 2026 |
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Overnight |
Temperature: 57°F |
| Clear with cloudy periods. |
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Morning |
Temperature: 67°F |
| Mostly sunny. |
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Afternoon |
Temperature: 73°F |
| Sunny. Windy at times. |
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Evening |
Temperature: 60°F |
| Clear. |
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