New Grand Chain, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
New Grand Chain weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast14%—92°69°—
- SundayJul 5Overcast26%—87°71°-5°
- MondayJul 6T-storm w/ Hail39%—88°72°+1°
- TuesdayJul 7Overcast15%—88°69°0°
- WednesdayJul 8Clear19%—89°67°+1°
- ThursdayJul 9Overcast20%—93°71°+4°
- FridayJul 10Thunderstorm45%—90°75°-3°
AQI 50 (Good), driven by Ozone. AQI down 5 over the last 6 hours (gradual decline). Ozone at AQI 49 now. With UV 7.9 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 36 around 1 PM.
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 49 now. With UV 7.9 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 36 around 1 PM.
- Present
- AQI 49
- UV peak
- 7.9 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 36
PM × Wind × Precip
PM2.5 at 7.3 µg/m³ (AQI 41) with a 0.92 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.92
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:47 PM
- Moonset
- 10:05 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
New Grand Chain at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: March 31 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — New Grand Chain
- Sat92°69°14%
- Sun87°71°26%
- Mon88°72°39%
- Tue88°69°15%
- Wed89°67°19%
- Thu93°71°20%
- Fri90°75°45%
- Sat87°70°31%
- Sun83°67°15%
- Mon80°59°11%
- Tue81°60°9%
- Wed85°63°9%
- Thu80°65°13%
- Fri80°68°13%
- Sat89°71°29%
- Sun91°72°19%
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 — New Grand Chain
SPC has placed New Grand Chain 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 New Grand Chain
- 62941