Lyndon, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Lyndon weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain44%0.60″85°69°—
- SundayJul 5Overcast24%—84°67°-1°
- MondayJul 6Light Drizzle——81°61°-3°
- TuesdayJul 7Overcast——80°58°-1°
- WednesdayJul 8Overcast23%—82°62°+2°
- ThursdayJul 9Drizzle31%—77°67°-5°
- FridayJul 10Overcast29%—80°64°+3°
AQI 23 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 4.9 µg/m³, PM10 at 5.6 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 during the projected peak around 8 PM.
What's driving it
PM × Wind × Precip
PM2.5 at 4.9 µg/m³, PM10 at 5.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.88
- Wind
- light
- Recent rain
- 1h 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
- 10:04 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Lyndon at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: April 26 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 61261
16-Day Forecast — Lyndon
- Sat85°69°44%
- Sun84°67°24%
- Mon81°61°3%
- Tue80°58°3%
- Wed82°62°23%
- Thu77°67°31%
- Fri80°64°29%
- Sat83°65°16%
- Sun69°58°9%
- Mon74°56°8%
- Tue75°60°12%
- Wed79°63°16%
- Thu82°66°16%
- Fri82°68°29%
- Sat85°70°19%
- Sun86°71°32%
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 — Lyndon
SPC has placed Lyndon 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 Lyndon
- 61261