Catalina, Arizona Weather
Heat hardens the dust. Day 77 of spring. Read this microseason across nine climate regions →
Catalina weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast10%—99°66°—
- ThursdayJun 4Overcast——97°69°-2°
- FridayJun 5Overcast——96°70°-1°
- SaturdayJun 6Overcast——94°70°-2°
- SundayJun 7Overcast——93°69°-1°
- MondayJun 8Overcast——97°71°+4°
- TuesdayJun 9Partly Cloudy——98°75°+1°
Ozone at AQI 42 now. AQI up 5 over the last 6 hours (gradual rise). With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 7 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 42 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 7 by mid-afternoon.
- Present
- AQI 42
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 7
PM × Wind × Precip
PM2.5 at 4.8 µg/m³, PM10 at 14.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.34
- 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
- 5:33 AM
- Moonset
- 3:50 PM
- In sign
- ♑︎ Capricorn
Heat hardens the dust
Catalina at a glance
- Today vs. normal: 81°F — typical for the season
- 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.
SPC Convective Outlook
Storm Prediction Center — Catalina
SPC has placed Catalina in the General Thunderstorms category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- 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.