Challenge-Brownsville, California Weather
Coastal fog thickens at dawn. Day 77 of spring. Read this microseason across nine climate regions →
Challenge-Brownsville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Clear——83°61°—
- FridayJun 5Overcast——83°64°0°
- SaturdayJun 6Overcast——76°55°-7°
- SundayJun 7Overcast——74°49°-2°
- MondayJun 8Light Rain32%0.22″60°49°-14°
- TuesdayJun 9Light Drizzle34%0.11″58°46°-2°
- WednesdayJun 10Mostly Clear——69°41°+11°
Ozone at AQI 49 now. AQI down 10 over the last 6 hours (steady decline since this morning). With UV 6.8 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 44 by mid-afternoon.
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 49 now. With UV 6.8 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 44 by mid-afternoon.
- Present
- AQI 49
- UV peak
- 6.8 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 44
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 6:36 AM
- Moonset
- 4:14 PM
- In sign
- ♒︎ Aquarius
Coastal fog thickens at dawn
Challenge-Brownsville at a glance
- Today vs. normal: 76°F — typical for the season
- Last frost: April 13 (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 4, 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.