Marion, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Marion weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast21%—94°71°—
- SundayJul 5Rain28%0.30″87°72°-7°
- MondayJul 6Light Drizzle30%—90°72°+3°
- TuesdayJul 7Overcast15%—87°69°-3°
- WednesdayJul 8Clear15%—91°66°+4°
- ThursdayJul 9Overcast25%—94°72°+3°
- FridayJul 10Light Showers42%0.27″90°73°-4°
AQI 58 (Moderate), driven by Ozone. AQI down 5 over the last 6 hours (gradual decline). Ozone at AQI 48 now. With UV 5.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 38 around 1 PM.
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 48 now. With UV 5.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 38 around 1 PM.
- Present
- AQI 48
- UV peak
- 5.9 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 38
PM × Wind × Precip
PM2.5 at 7.7 µg/m³ (AQI 43) with a 0.94 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.94
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 10:47 PM
- Moonset
- 10:04 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Marion at a glance
- Today vs. normal: 14°F above the seasonal normal for this latitude
- Last frost: April 2 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 62959
16-Day Forecast — Marion
- Sat94°71°21%
- Sun87°72°28%
- Mon90°72°30%
- Tue87°69°15%
- Wed91°66°15%
- Thu94°72°25%
- Fri90°73°42%
- Sat91°71°30%
- Sun80°65°15%
- Mon77°58°8%
- Tue80°60°10%
- Wed86°64°9%
- Thu84°65°13%
- Fri83°69°13%
- Sat84°71°29%
- Sun90°72°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 — Marion
SPC has placed Marion in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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 Marion
- 62959