Castroville, Texas Weather
Fireflies pulse through the magnolias. Day 76 of spring. Read this microseason across nine climate regions →
Castroville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Showers53%0.24″90°72°—
- ThursdayJun 4Heavy Showers14%0.57″83°72°-7°
- FridayJun 5Showers65%—85°72°+2°
- SaturdayJun 6Drizzle65%—89°71°+4°
- SundayJun 7Overcast41%—95°73°+6°
- MondayJun 8Overcast16%—96°74°+1°
- TuesdayJun 9Overcast13%—95°73°-1°
Ozone at AQI 43. AQI flat over the last 6 hours (within ±3 points). Overcast through the UV peak window (cloud cover ~61%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43. Overcast through the UV peak window (cloud cover ~61%) — afternoon ozone should stay flat.
- Present
- AQI 43
- UV peak
- 9.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 27
PM × Wind × Precip
PM2.5 at 6.8 µg/m³, PM10 at 8.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.79
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 3:53 AM
- Moonset
- 2:09 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
Castroville at a glance
- Today vs. normal: 84°F — typical for the season
- Last frost: February 11 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 3, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Castroville
SPC has placed Castroville in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.