Arivaca Junction, Arizona Weather
Heat hardens the dust. Day 77 of spring. Read this microseason across nine climate regions →
Arivaca Junction weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——99°70°—
- FridayJun 5Overcast——98°68°-1°
- SaturdayJun 6Overcast——95°68°-3°
- SundayJun 7Overcast——94°69°-1°
- MondayJun 8Overcast——96°67°+2°
- TuesdayJun 9Overcast——99°72°+3°
- WednesdayJun 10Overcast——94°71°-5°
Ozone at AQI 500 now. AQI up 11 over the last 6 hours (gradual rise). With UV 9.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 600 by mid-afternoon.
AVOID OUTDOORS Avoid outdoor exertion. Keep windows closed; use HEPA filtration indoors if available.
What's driving it
Ozone × UV × Sky
Ozone at AQI 500 now. With UV 9.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 600 by mid-afternoon.
- Present
- AQI 500
- UV peak
- 9.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 600
PM × Wind × Precip
PM2.5 at 6.4 µg/m³, PM10 at 15.3 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.42
- Wind
- calm
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:32 AM
- Moonset
- 3:53 PM
- In sign
- ♒︎ Aquarius
Heat hardens the dust
Arivaca Junction at a glance
- Today vs. normal: 15°F above the seasonal normal for this latitude
- Last frost: February 25 (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.
SPC Convective Outlook
Storm Prediction Center — Arivaca Junction
SPC has placed Arivaca Junction in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
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.