Allerton, Illinois Weather
Sun climbs to its northern throne. Day 88 of spring. Read this microseason across nine climate regions →
Allerton weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Mostly Clear——73°56°—
- TuesdayJun 16Overcast51%—75°55°+2°
- WednesdayJun 17T-storm w/ Hvy Hail95%0.05″81°54°+6°
- ThursdayJun 18Thunderstorm95%—74°57°-7°
- FridayJun 19Light Drizzle——72°55°-2°
- SaturdayJun 20Overcast13%—73°55°+1°
- SundayJun 21Light Drizzle44%0.04″66°61°-7°
AQI 26 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 35 now. With UV 6.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 32 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 35 now. With UV 6.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 32 around 1 PM.
- Present
- AQI 35
- UV peak
- 6.9 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 32
PM × Wind × Precip
PM2.5 at 4.7 µg/m³ (AQI 26) with a 0.89 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.89
- Wind
- calm
- 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
- 5:25 AM
- Moonset
- 8:37 PM
- In sign
- ♋︎ Cancer
Sun climbs to its northern throne
Allerton at a glance
- Today vs. normal: 9°F below the seasonal normal for this latitude
- Last frost: April 15 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Allerton
- Mon73°56°0%
- Tue75°55°51%
- Wed81°54°95%
- Thu74°57°95%
- Fri72°55°3%
- Sat73°55°13%
- Sun66°61°44%
- Mon73°57°46%
- Tue72°53°21%
- Wed76°56°11%
- Thu81°60°13%
- Fri85°69°21%
- Sat89°74°46%
- Sun89°75°35%
- Mon79°67°35%
- Tue82°64°46%
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 — Allerton
SPC has placed Allerton in the Enhanced Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWMRGLMarginal Risk
- DAY 3ENHEnhanced Risk
Numerous severe storms likely. Tornadoes, large hail, and damaging wind gusts possible across the area. Track NWS warnings if storms develop.
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 Allerton
- 61810