San Luis, Arizona Weather
Heat hardens the dust. Day 77 of spring. Read this microseason across nine climate regions →
San Luis weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Clear——106°74°—
- FridayJun 5Clear——103°72°-3°
- SaturdayJun 6Overcast——101°74°-2°
- SundayJun 7Overcast——101°74°0°
- MondayJun 8Clear——101°71°0°
- TuesdayJun 9Clear——106°71°+5°
- WednesdayJun 10Overcast——103°73°-3°
PM10 at 61.7 µg/m³ (AQI 54) with a 0.21 fine-to-coarse ratio under 10 mph wind — coarse road or agricultural dust being kicked up. AQI flat over the last 6 hours (within ±3 points).
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 38 now. With UV 8.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 43 by mid-afternoon.
- Present
- AQI 38
- UV peak
- 8.4 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 43
PM × Wind × Precip
PM10 at 61.7 µg/m³ (AQI 54) with a 0.21 fine-to-coarse ratio under 10 mph wind — coarse road or agricultural dust being kicked up.
- PM2.5/PM10
- 0.21
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- blown dust
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
- 5:48 AM
- Moonset
- 4:06 PM
- In sign
- ♒︎ Aquarius
Heat hardens the dust
San Luis at a glance
- Today vs. normal: 6°F above the seasonal normal for this latitude
- Last frost: March 2 (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.