Duncan, Arizona Weather
Heat hardens the dust. Day 77 of spring. Read this microseason across nine climate regions →
Duncan weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Light Drizzle16%0.02″93°61°—
- FridayJun 5Overcast——99°65°+6°
- SaturdayJun 6Overcast——95°68°-4°
- SundayJun 7Overcast——96°71°+1°
- MondayJun 8Overcast——99°72°+3°
- TuesdayJun 9Overcast——102°75°+3°
- WednesdayJun 10Overcast——98°79°-4°
Ozone at AQI 44 now. AQI flat over the last 6 hours (within ±3 points). With UV 9.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 58 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 44 now. With UV 9.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 58 by mid-afternoon.
- Present
- AQI 44
- UV peak
- 9.9 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 58
PM × Wind × Precip
PM2.5/PM10 ratio 0.66 with 8 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.66
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
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
- 5:26 AM
- Moonset
- 3:42 PM
- In sign
- ♒︎ Aquarius
Heat hardens the dust
Duncan at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: March 3 (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 — Duncan
SPC has placed Duncan 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.