Somonauk, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Somonauk weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain81%0.54″82°70°—
- SundayJul 5Overcast22%—80°66°-2°
- MondayJul 6Overcast——80°63°0°
- TuesdayJul 7Overcast——80°58°0°
- WednesdayJul 8Overcast11%—80°63°0°
- ThursdayJul 9Showers51%0.26″77°66°-3°
- FridayJul 10Overcast41%—81°62°+4°
AQI 23 (Good), driven by Ozone. AQI down 5 over the last 6 hours (gradual decline). Ozone at AQI 32. Overcast through the UV peak window (cloud cover ~73%) — afternoon ozone should stay flat.
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 32. Overcast through the UV peak window (cloud cover ~73%) — afternoon ozone should stay flat.
- Present
- AQI 32
- UV peak
- 3.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 6
PM × Wind × Precip
PM2.5 at 5.5 µg/m³, PM10 at 6.3 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.87
- Wind
- light
- Recent rain
- 1h in last 6h
- Pattern
- background
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
- 10:52 PM
- Moonset
- 9:59 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Somonauk at a glance
- Today vs. normal: 8°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: 60552
16-Day Forecast — Somonauk
- Sat82°70°81%
- Sun80°66°22%
- Mon80°63°6%
- Tue80°58°1%
- Wed80°63°11%
- Thu77°66°51%
- Fri81°62°41%
- Sat81°62°14%
- Sun68°58°7%
- Mon74°56°9%
- Tue77°59°9%
- Wed78°61°26%
- Thu82°65°21%
- Fri81°69°29%
- Sat84°70°23%
- Sun83°71°31%
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 — Somonauk
SPC has placed Somonauk in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
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 Somonauk
- 60548
- 60552