No

you don't need a jacket based on the weather in San Marcos, TX, USA 1 second ago

95°F35°C & Clear

Wind is 9 mph15 km/h from the East, gusting to 12 mph20 km/h
August 9
7pm95°F35°C10 mph16 km/h SoutheastClear
8pm94°F34°C11 mph17 km/h SoutheastMostly Clear
9pm90°F32°C10 mph17 km/h SoutheastClear
10pm87°F31°C10 mph16 km/h SoutheastMostly Clear
11pm85°F29°C11 mph18 km/h SoutheastMostly Clear
August 10
12am83°F28°C9 mph15 km/h SoutheastClear
1am82°F28°C9 mph15 km/h SoutheastClear
2am80°F27°C8 mph13 km/h SouthClear
3am79°F26°C7 mph11 km/h SouthClear
4am78°F25°C6 mph10 km/h SouthClear
5am77°F25°C5 mph7 km/h SouthClear
6am76°F24°C4 mph6 km/h SouthClear
DateLowHighWindDayNight
August 975°F24°C96°F36°C5 mph8 km/h from SoutheastClearClear
August 1075°F24°C94°F34°C6 mph10 km/h from SoutheastMostly ClearMostly Clear
August 1174°F23°C92°F33°C5 mph8 km/h from SoutheastMostly ClearMostly Clear
August 1275°F24°C93°F34°C5 mph7 km/h from SoutheastMostly ClearMostly Clear
August 1375°F24°C93°F34°C5 mph7 km/h from SouthMostly ClearMostly Clear
August 1475°F24°C94°F35°C8 mph12 km/h from SouthMostly ClearMostly Clear
August 1576°F24°C92°F33°C10 mph16 km/h from SouthMostly ClearMostly Clear

No

Low of 74°F24°C, High of 94°F35°C
Wind: 6 mph10 km/h
Precipitation: None

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