Lake Summerset, Illinois Weather
Night falls a minute earlier. Day 43 of summer. Read this microseason across nine climate regions →
Lake Summerset weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayAug 2Overcast——78°63°—
- MondayAug 3Clear——84°60°+6°
- TuesdayAug 4Overcast——81°62°-3°
- WednesdayAug 5Thunderstorm62%1.8″79°64°-2°
- ThursdayAug 6Heavy Showers48%0.37″79°61°0°
- FridayAug 7Overcast——80°62°+1°
- SaturdayAug 8Light Drizzle11%—87°70°+7°
AQI 34 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 5.3 µg/m³, PM10 at 5.5 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 5.3 µg/m³, PM10 at 5.5 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.96
- Wind
- breezy
- Recent rain
- 0h 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).
Red sky at night, sailor's delight.
- Moonrise
- 9:42 PM
- Moonset
- 10:03 AM
- In sign
- ♓︎ Pisces
Night falls a minute earlier
Lake Summerset at a glance
- Today vs. normal: 10°F above the seasonal normal for this latitude
- Last frost: May 1 (climatological average for this latitude)
- Microseason: Aug 1–5
- Planting window: Sow fall peas. Start kale and collard seedlings for fall.
16-Day Forecast — Lake Summerset
- Sun78°63°2%
- Mon84°60°0%
- Tue81°62°9%
- Wed79°64°62%
- Thu79°61°48%
- Fri80°62°5%
- Sat87°70°11%
- Sun89°73°21%
- Mon75°68°24%
- Tue79°66°33%
- Wed86°69°23%
- Thu88°69°18%
- Fri89°72°24%
- Sat80°64°27%
- Sun78°60°21%
- Mon80°65°23%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of August 2, 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 — Lake Summerset
SPC includes Lake Summerset in the general thunderstorm area day after tomorrow — no severe risk, but storms are possible.
- 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.
Sun & seasons in Lake Summerset
Lake Summerset sits in Winnebago County, where the year’s longest day runs 15h 18m of daylight and its shortest just 9h 4m — a swing of +6h 14m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Chicago, the state’s largest city, lies about 97 miles to the ESE. The nearest town Lake Summerset tracks is Rockford, roughly 22 miles to the SE.
Air quality in Lake Summerset’s county has held roughly steady since 2020; its cleanest year on record was 2025 (median AQI 40). See the full air-quality history for Lake Summerset.
ZIP codes in Lake Summerset
- 61019