Percy, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Percy weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle45%0.01″93°73°—
- SundayJul 5Heavy Rain35%1.6″86°72°-7°
- MondayJul 6Overcast29%—88°70°+2°
- TuesdayJul 7Overcast12%—87°69°-1°
- WednesdayJul 8Overcast15%—90°67°+3°
- ThursdayJul 9Overcast24%—95°72°+5°
- FridayJul 10Thunderstorm38%0.08″89°73°-6°
AQI 42 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 7.1 µg/m³, PM10 at 7.7 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
Ozone × UV × Sky
Ozone at AQI 37 now. With UV 4.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 22 around 1 PM.
- Present
- AQI 37
- UV peak
- 4.4 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 22
PM × Wind × Precip
PM2.5 at 7.1 µg/m³, PM10 at 7.7 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.92
- Wind
- light
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:50 PM
- Moonset
- 10:06 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Percy at a glance
- Today vs. normal: 14°F above the seasonal normal for this latitude
- Last frost: April 4 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 62272
16-Day Forecast — Percy
- Sat93°73°45%
- Sun86°72°35%
- Mon88°70°29%
- Tue87°69°12%
- Wed90°67°15%
- Thu95°72°24%
- Fri89°73°38%
- Sat94°70°24%
- Sun81°64°15%
- Mon78°59°9%
- Tue80°60°9%
- Wed86°64°8%
- Thu80°65°11%
- Fri80°68°10%
- Sat88°70°17%
- Sun92°73°26%
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 — Percy
SPC has placed Percy in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
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 Percy
- 62272