Weather in Castroville
Current conditions, today's hourly forecast, and a 3-day outlook for Castroville, United States (America/Chicago). Data from WeatherAPI.com.
- High / Low
- 17° / 32°
- Wind
- 12 km/h SE
- Humidity
- 43%
- Rain today
- 0%
- UV
- 2
Active alerts
- Air Quality Alert Unknown
Air Quality Alert issued May 12 at 2:26PM CDT by NWS Austin/San Antonio TX
Areas: Bandera; Kendall; Medina; Bexar; Comal; Guadalupe; Atascosa; Wilson
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AQAEWX The Texas Commission on Environmental Quality (TCEQ) has issued an Ozone Action Day for the San Antonio area for Wednesday, May 13, 2026. Atmospheric conditions are expected to be favorable for producing high levels of ozone air pollution in the San Antonio area on Wednesday. You can help prevent ozone pollution by sharing a ride, walking or riding a bicycle, taking your lunch to work, avoiding drive through lanes, conserving energy, and keeping your vehicle properly tuned. If required, the next Ozone Action Day will be issued by 3 PM on Wednesday, May 13, 2026.
Today, hour by hour
- 19:00 28° 0%
- 20:00 26° 0%
- 21:00
25° 0% - 22:00 24° 0%
- 23:00 23° 0%
3-day outlook
- Wed 13 May Sunny Rain 0% 17° / 32°
- Thu 14 May Sunny Rain 0% 17° / 32°
- Fri 15 May
Partly Cloudy Rain 0% 18° / 33°