Weather Alerts For Castle Hills, TX

Pollen Index: 9.2 Pollen Level: medium-high Predominant Pollen: Chenopods and Elm. Concentration of pollen grains in the air for Friday will be falling in the moderate range. This forecast of lower pollen concentration is based on rising humidity, weakening winds and expected precipitation in the afternoon and evening which tends to wash pollen out of the air. That's good news for allergy sufferers.