Johnsonville, Illinois Weather
Sun climbs to its northern throne. Day 88 of spring. Read this microseason across nine climate regions →
Johnsonville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Partly Cloudy——78°56°—
- TuesdayJun 16Overcast44%—84°58°+6°
- WednesdayJun 17Light Drizzle62%—84°60°0°
- ThursdayJun 18Light Showers62%—77°62°-7°
- FridayJun 19Partly Cloudy23%—73°57°-4°
- SaturdayJun 20Overcast——77°57°+4°
- SundayJun 21Drizzle40%—81°62°+4°
AQI 29 (Good), driven by PM2.5. AQI down 13 over the last 6 hours (gradual decline). PM2.5 at 5.4 µg/m³ (AQI 30) with a 0.95 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.
What's driving it
PM × Wind × Precip
PM2.5 at 5.4 µg/m³ (AQI 30) with a 0.95 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.95
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:33 AM
- Moonset
- 8:34 PM
- In sign
- ♊︎ Gemini
Sun climbs to its northern throne
Johnsonville at a glance
- Today vs. normal: 19°F below the seasonal normal for this latitude
- Last frost: April 7 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
15-Day Forecast — Johnsonville
- Mon78°56°0%
- Tue84°58°44%
- Wed84°60°62%
- Thu77°62°62%
- Fri73°57°23%
- Sat77°57°3%
- Sun81°62°40%
- Mon74°61°49%
- Tue77°61°24%
- Wed83°63°8%
- Thu87°69°11%
- Fri92°73°19%
- Sat93°73°34%
- Sun94°76°35%
- Mon94°76°36%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 15, 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 — Johnsonville
SPC has placed Johnsonville in the Slight Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3SLGTSlight 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 Johnsonville
- 62850