Royal, Illinois Weather
Fireflies pulse through the magnolias. Day 76 of spring. Read this microseason across nine climate regions →
Royal weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——84°54°—
- ThursdayJun 4Overcast——86°59°+2°
- FridayJun 5Light Drizzle26%—81°66°-5°
- SaturdayJun 6Light Showers47%—82°65°+1°
- SundayJun 7Overcast33%—85°68°+3°
- MondayJun 8Light Showers25%0.01″78°68°-7°
- TuesdayJun 9Light Drizzle15%—77°69°-1°
Ozone at AQI 83. AQI up 12 over the last 6 hours (gradual rise). Overcast through the UV peak window (cloud cover ~67%) — afternoon ozone should stay flat.
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 83. Overcast through the UV peak window (cloud cover ~67%) — afternoon ozone should stay flat.
- Present
- AQI 83
- UV peak
- 7.8 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 43
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).
The higher the clouds, the finer the weather.
- Moonrise
- 3:44 AM
- Moonset
- 12:50 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
Royal at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: April 17 (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 3, 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 — Royal
SPC has placed Royal in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- 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.