Chapin, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Chapin weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast25%—89°72°—
- SundayJul 5Overcast13%—85°71°-4°
- MondayJul 6Light Drizzle10%—81°66°-4°
- TuesdayJul 7Partly Cloudy——83°62°+2°
- WednesdayJul 8Overcast——89°65°+6°
- ThursdayJul 9Thunderstorm39%0.08″86°70°-3°
- FridayJul 10Light Showers39%0.21″87°68°+1°
AQI 30 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±4 points). PM2.5 at 9.6 µg/m³, PM10 at 10.9 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 43. Overcast through the UV peak window (cloud cover ~63%) — afternoon ozone should stay flat.
- Present
- AQI 43
- UV peak
- 5.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 15
PM × Wind × Precip
PM2.5 at 9.6 µg/m³, PM10 at 10.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.88
- Wind
- breezy
- 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
- 10:56 PM
- Moonset
- 10:08 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Chapin at a glance
- Today vs. normal: 17°F above the seasonal normal for this latitude
- Last frost: April 15 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 62628
16-Day Forecast — Chapin
- Sat89°72°25%
- Sun85°71°13%
- Mon81°66°10%
- Tue83°62°4%
- Wed89°65°6%
- Thu86°70°39%
- Fri87°68°39%
- Sat73°62°21%
- Sun76°59°6%
- Mon76°58°5%
- Tue75°57°11%
- Wed81°59°13%
- Thu86°63°16%
- Fri87°67°26%
- Sat79°69°13%
- Sun76°63°13%
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 — Chapin
SPC has placed Chapin 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 Chapin
- 62628