Frankfort, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Frankfort weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain91%4.2″85°69°—
- SundayJul 5Foggy13%—77°67°-8°
- MondayJul 6Overcast——77°63°0°
- TuesdayJul 7Mostly Clear——80°59°+3°
- WednesdayJul 8Light Drizzle——82°62°+2°
- ThursdayJul 9Thunderstorm55%0.04″78°68°-4°
- FridayJul 10Drizzle33%0.04″78°66°0°
AQI 72 (Moderate), driven by PM2.5. AQI up 35 in the last 6 hours — air quality is degrading. PM scrubbed by 3 hours of recent rain — PM2.5 down to 17.5 µg/m³, PM10 to 17.9 µg/m³.
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 58 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 58
- UV peak
- 0.6 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 58
PM × Wind × Precip
PM scrubbed by 3 hours of recent rain — PM2.5 down to 17.5 µg/m³, PM10 to 17.9 µg/m³.
- PM2.5/PM10
- 0.98
- Wind
- light
- Recent rain
- 3h in last 6h
- Pattern
- washed out
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
- 10:48 PM
- Moonset
- 9:56 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Frankfort at a glance
- Today vs. normal: 71°F — typical for the season
- Last frost: April 25 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 60423
16-Day Forecast — Frankfort
- Sat85°69°91%
- Sun77°67°13%
- Mon77°63°4%
- Tue80°59°2%
- Wed82°62°5%
- Thu78°68°55%
- Fri78°66°33%
- Sat72°59°11%
- Sun76°57°8%
- Mon75°57°9%
- Tue76°56°7%
- Wed78°61°42%
- Thu81°61°29%
- Fri75°68°26%
- Sat79°65°27%
- Sun73°60°45%
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 — Frankfort
SPC has placed Frankfort in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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 Frankfort
- 60423