Chapin, Illinois Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Chapin weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast11%—87°70°—
- MondayJul 6Overcast——86°69°-1°
- TuesdayJul 7Overcast——83°65°-3°
- WednesdayJul 8Overcast——86°64°+3°
- ThursdayJul 9Showers38%0.04″88°70°+2°
- FridayJul 10Showers44%0.27″76°69°-12°
- SaturdayJul 11Heavy Drizzle30%0.07″84°68°+8°
AQI 29 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 42 now. With UV 5.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 29 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 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 42 now. With UV 5.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 29 around 1 PM.
- Present
- AQI 42
- UV peak
- 5.2 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 29
PM × Wind × Precip
PM2.5 at 6.1 µg/m³ (AQI 34) with a 0.85 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.85
- 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
- 11:19 PM
- Moonset
- 11:14 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Chapin at a glance
- Today vs. normal: 9°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
- Sun87°70°11%
- Mon86°69°4%
- Tue83°65°1%
- Wed86°64°1%
- Thu88°70°38%
- Fri76°69°44%
- Sat84°68°30%
- Sun87°69°9%
- Mon93°71°8%
- Tue94°74°5%
- Wed80°64°7%
- Thu78°57°19%
- Fri83°64°27%
- Sat88°68°27%
- Sun90°74°26%
- Mon90°73°13%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 includes Chapin in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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