Calumet City, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Calumet City weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Showers77%0.68″81°69°—
- SundayJul 5Foggy12%—75°66°-6°
- MondayJul 6Overcast——78°68°+3°
- TuesdayJul 7Overcast——80°66°+2°
- WednesdayJul 8Overcast——86°66°+6°
- ThursdayJul 9Thunderstorm50%0.25″82°67°-4°
- FridayJul 10Overcast45%—78°67°-4°
AQI 39 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 10.0 µg/m³ (AQI 53) with a 0.93 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43. Overcast through the UV peak window (cloud cover ~78%) — afternoon ozone should stay flat.
- Present
- AQI 43
- UV peak
- 2.9 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 10.0 µg/m³ (AQI 53) with a 0.93 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.93
- 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
- 9:54 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Calumet City at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 26 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 60409
16-Day Forecast — Calumet City
- Sat81°69°77%
- Sun75°66°12%
- Mon78°68°5%
- Tue80°66°1%
- Wed86°66°5%
- Thu82°67°50%
- Fri78°67°45%
- Sat85°65°14%
- Sun72°64°10%
- Mon74°62°10%
- Tue79°65°9%
- Wed86°65°19%
- Thu89°69°23%
- Fri88°73°16%
- Sat86°72°14%
- Sun92°73°28%
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 — Calumet City
SPC has placed Calumet City in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- 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.
ZIP codes in Calumet City
- 60409