Duncan, Oklahoma Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Duncan weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast——101°75°—
- SundayJul 5Light Drizzle15%0.01″94°73°-7°
- MondayJul 6Overcast——101°73°+7°
- TuesdayJul 7Overcast——103°72°+2°
- WednesdayJul 8Mostly Clear——108°73°+5°
- ThursdayJul 9Partly Cloudy——108°77°0°
- FridayJul 10Overcast——106°81°-2°
AQI 35 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 8.4 µg/m³ (AQI 47), ratio 0.69 with 12 mph wind — characteristic of long-range haze transport rather than a local source.
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 39 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 39
- UV peak
- 4.5 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 39
PM × Wind × Precip
PM2.5 at 8.4 µg/m³ (AQI 47), ratio 0.69 with 12 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.69
- Wind
- breezy
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:20 PM
- Moonset
- 10:45 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Duncan at a glance
- Today vs. normal: 24°F above the seasonal normal for this latitude
- Last frost: March 14 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 73533
16-Day Forecast — Duncan
- Sat100°75°1%
- Sun94°76°15%
- Mon101°73°8%
- Tue103°72°5%
- Wed108°73°3%
- Thu108°77°3%
- Fri106°81°6%
- Sat89°74°8%
- Sun94°70°6%
- Mon93°68°4%
- Tue92°72°3%
- Wed92°70°6%
- Thu94°67°14%
- Fri95°72°19%
- Sat101°75°17%
- Sun99°69°19%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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 Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
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.
ZIP codes in Duncan
- 73533
- 73055
- 73534