Union Hill, Illinois Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Union Hill weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——86°60°—
- FridayJun 5Overcast53%—86°68°0°
- SaturdayJun 6Showers69%—84°70°-2°
- SundayJun 7Light Showers37%—85°71°+1°
- MondayJun 8Light Showers50%0.06″76°69°-9°
- TuesdayJun 9Drizzle42%—81°68°+5°
- WednesdayJun 10Drizzle27%—79°70°-2°
Ozone at AQI 75 now. AQI flat over the last 6 hours (within ±3 points). With UV 8.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 87 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 75 now. With UV 8.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 87 by mid-afternoon.
- Present
- AQI 75
- UV peak
- 8.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 87
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
- 4:25 AM
- Moonset
- 1:51 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Union Hill at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: April 23 (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 — Union Hill
SPC has placed Union Hill in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWMRGLMarginal Risk
- 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.