Lanark, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Lanark weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Rain39%0.23″84°68°—
- SundayJul 5Overcast27%—84°66°0°
- MondayJul 6Mostly Clear——80°59°-4°
- TuesdayJul 7Overcast——80°58°0°
- WednesdayJul 8Overcast24%—80°60°0°
- ThursdayJul 9Showers30%0.31″79°68°-1°
- FridayJul 10Overcast26%—78°62°-1°
AQI 22 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 6.3 µg/m³, PM10 at 8.5 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 6.3 µg/m³, PM10 at 8.5 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.74
- 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
- 10:57 PM
- Moonset
- 10:03 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Lanark at a glance
- Today vs. normal: 72°F — typical for the season
- Last frost: April 29 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 61046
16-Day Forecast — Lanark
- Sat83°68°39%
- Sun84°66°27%
- Mon80°59°2%
- Tue80°58°3%
- Wed80°60°24%
- Thu79°68°30%
- Fri78°62°26%
- Sat81°63°14%
- Sun67°58°7%
- Mon74°55°9%
- Tue74°59°12%
- Wed79°63°17%
- Thu81°66°16%
- Fri82°67°23%
- Sat84°69°32%
- Sun84°71°35%
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 — Lanark
SPC includes Lanark in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- 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 Lanark
- 61046