Weather Alerts For San Marcos, TX

Pollen Index: 9.5 Pollen Level: medium-high Predominant Pollen: Oak, Willow and Hickory/Pecan. Pollen concentrations for Saturday will be falling but will remain in the high range. This lowering of pollen concentrations is a result of rising humidity, weakening winds and expected precipitation in the evening which tends to wash pollen out of the air. The lower pollen levels are significant and should help allergy sufferers to cope tomorrow.