Cullom, Illinois Weather
Fireflies pulse through the magnolias. Day 76 of spring. Read this microseason across nine climate regions →
Cullom weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——86°51°—
- ThursdayJun 4Overcast——88°59°+2°
- FridayJun 5Drizzle59%—81°68°-7°
- SaturdayJun 6Light Showers59%—81°68°0°
- SundayJun 7Overcast41%—84°64°+3°
- MondayJun 8Drizzle20%—77°67°-7°
- TuesdayJun 9Light Drizzle26%—74°69°-3°
Ozone at AQI 73 — peak already passed at 1 PM under overcast skies. AQI up 18 in the last 6 hours — air quality is degrading. Levels should ease through evening.
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 73 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
- Present
- AQI 73
- UV peak
- 5.7 at earlier today
- Sky at peak
- overcast
- Projected peak
- AQI 73
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
- 3:48 AM
- Moonset
- 12:48 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
Cullom at a glance
- Today vs. normal: 11°F above the seasonal normal for this latitude
- Last frost: April 21 (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 — Cullom
SPC has placed Cullom 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.