St. David, Illinois Weather
Fireflies pulse through the magnolias. Day 76 of spring. Read this microseason across nine climate regions →
St. David weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——83°54°—
- ThursdayJun 4Overcast——86°58°+3°
- FridayJun 5Drizzle54%—83°67°-3°
- SaturdayJun 6Showers51%—82°69°-1°
- SundayJun 7Light Showers32%—85°68°+3°
- MondayJun 8Showers46%0.06″77°70°-8°
- TuesdayJun 9Light Drizzle30%—80°70°+3°
Ozone at AQI 56 now. AQI flat over the last 6 hours (within ±3 points). With UV 8.8 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 47 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 56 now. With UV 8.8 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 47 by mid-afternoon.
- Present
- AQI 56
- UV peak
- 8.8 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 47
PM × Wind × Precip
PM2.5 at 8.2 µg/m³ (AQI 46) with a 0.81 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.81
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 3:54 AM
- Moonset
- 12:57 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
St. David at a glance
- Today vs. normal: 5°F above the seasonal normal for this latitude
- Last frost: April 19 (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 — St. David
SPC has placed St. David 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.