Junction, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Junction weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast18%—91°70°—
- SundayJul 5Drizzle20%0.05″85°71°-6°
- MondayJul 6Thunderstorm26%—87°72°+2°
- TuesdayJul 7Overcast19%—84°69°-3°
- WednesdayJul 8Clear25%—87°67°+3°
- ThursdayJul 9Overcast33%—93°71°+6°
- FridayJul 10Thunderstorm39%0.39″88°71°-5°
AQI 59 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 10.5 µg/m³ (AQI 54) with a 0.93 fine-to-coarse ratio and 6 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
Ozone × UV × Sky
Ozone at AQI 34 now. With UV 3.7 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 12 around 1 PM.
- Present
- AQI 34
- UV peak
- 3.7 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 12
PM × Wind × Precip
PM2.5 at 10.5 µg/m³ (AQI 54) with a 0.93 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.93
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:44 PM
- Moonset
- 10:02 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Junction at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: April 2 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 62954
16-Day Forecast — Junction
- Sat91°70°18%
- Sun85°71°20%
- Mon87°72°26%
- Tue84°69°19%
- Wed87°67°25%
- Thu93°71°33%
- Fri88°71°39%
- Sat89°71°23%
- Sun79°65°14%
- Mon75°59°6%
- Tue79°61°7%
- Wed82°63°11%
- Thu83°66°16%
- Fri79°71°11%
- Sat82°71°26%
- Sun90°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 — Junction
SPC has placed Junction in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
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 Junction
- 62954