10-Day Weather Forecast - San Marcos, TX

Showers. A chance of thunderstorms in the morning then thunderstorms likely in the afternoon. Some thunderstorms may produce heavy rainfall in the morning. Some thunderstorms may produce heavy rainfall in the afternoon. Humid with highs in the lower 80s. East winds around 5 mph. Chance of rain 80 percent.

Mostly cloudy with a chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall. Lows in the lower 70s. East winds around 5 mph. Chance of rain 50 percent.

Mostly cloudy with a chance of showers. A slight chance of thunderstorms in the morning then a chance of thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the morning. Some thunderstorms may produce heavy rainfall in the afternoon. Humid with highs in the mid 80s. Southeast winds 5 to 10 mph. Chance of rain 50 percent.

Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower 70s. South winds around 5 mph.

Partly cloudy. Highs around 90. Lows in the mid 70s.

Partly cloudy. Highs around 90. Lows in the mid 70s.

Mostly cloudy in the morning then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Highest heat index readings up to 110.

Partly cloudy in the evening then becoming mostly cloudy. A slight chance of thunderstorms. A slight chance of showers in the evening then a chance of showers after midnight. Lows in the upper 70s. Chance of rain 30 percent. Highest heat index readings up to 105 early in the evening.

Cloudy in the morning then becoming partly cloudy. A chance of showers. A slight chance of thunderstorms in the morning then a chance of thunderstorms in the afternoon. Highs around 90. Chance of rain 50 percent.

Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 70s. Chance of rain 40 percent.

Cloudy in the morning then becoming partly cloudy. A chance of showers. A slight chance of thunderstorms in the morning then a chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 40 percent.

Partly cloudy in the evening then becoming mostly cloudy. A slight chance of thunderstorms in the evening. A slight chance of showers. Lows in the mid 70s.

Mostly cloudy in the morning then becoming partly cloudy. A slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 90s. Highest heat index readings up to 105.

Mostly clear with a 45% chance for rain and thunderstorms. Low temperature around 77F. Dew point will be around 76F with an average humidity of 87%. Winds will be 13 mph from the S.

Partly cloudy with a 55% chance for rain and thunderstorms. High temperature around 91F. Dew point will be around 76F with an average humidity of 75%. Winds will be 11 mph from the S.

Clear with widely scattered thunderstorms. Chance of storms 30%. Low temperature around 75F. Dew point will be around 76F with an average humidity of 87%. Winds will be 10 mph from the SE.

Mostly cloudy with a 60% chance for rain and thunderstorms. High temperature around 91F. Dew point will be around 75F with an average humidity of 73%. Winds will be 10 mph from the SE.

Mostly clear with a 30% chance for rain and thunderstorms. Low temperature around 74F. Dew point will be around 74F with an average humidity of 84%. Winds will be 9 mph from the SE.