Henderson, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Henderson weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle63%0.01″85°68°—
- SundayJul 5Overcast25%—84°68°-1°
- MondayJul 6Mostly Clear——81°64°-3°
- TuesdayJul 7Clear——80°60°-1°
- WednesdayJul 8Overcast10%—83°63°+3°
- ThursdayJul 9Thunderstorm39%—83°70°0°
- FridayJul 10Overcast39%—79°65°-4°
AQI 22 (Good), driven by Ozone. Ozone at AQI 40 now. With UV 4.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 15 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 40 now. With UV 4.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 15 around 1 PM.
- Present
- AQI 40
- UV peak
- 4.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 15
PM × Wind × Precip
PM2.5 at 4.7 µg/m³, PM10 at 5.5 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.85
- Wind
- light
- 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
- 10:57 PM
- Moonset
- 10:06 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Henderson at a glance
- Today vs. normal: 10°F above the seasonal normal for this latitude
- Last frost: April 22 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 61439
16-Day Forecast — Henderson
- Sat85°68°63%
- Sun84°68°25%
- Mon81°64°4%
- Tue80°60°2%
- Wed83°63°10%
- Thu83°70°39%
- Fri79°65°39%
- Sat83°65°14%
- Sun68°58°9%
- Mon74°55°6%
- Tue75°60°6%
- Wed79°64°19%
- Thu80°65°14%
- Fri82°68°19%
- Sat85°69°23%
- Sun85°71°29%
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 — Henderson
SPC has placed Henderson in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
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 Henderson
- 61439
- 61488