LaSalle, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
LaSalle weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Showers78%1.1″84°70°—
- SundayJul 5Overcast18%—83°68°-1°
- MondayJul 6Overcast——81°64°-2°
- TuesdayJul 7Overcast——80°58°-1°
- WednesdayJul 8Overcast22%—81°63°+1°
- ThursdayJul 9Thunderstorm34%0.02″79°65°-2°
- FridayJul 10Overcast31%—79°63°0°
AQI 26 (Good), driven by PM2.5. AQI down 8 over the last 6 hours (gradual decline). PM2.5 at 6.1 µg/m³ (AQI 34) with a 0.90 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
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 6.1 µg/m³ (AQI 34) with a 0.90 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.90
- 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
- 10:53 PM
- Moonset
- 10:01 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
LaSalle at a glance
- Today vs. normal: 6°F above the seasonal normal for this latitude
- Last frost: April 24 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — LaSalle
- Sat84°70°78%
- Sun83°68°18%
- Mon81°64°4%
- Tue80°58°4%
- Wed81°63°22%
- Thu79°65°34%
- Fri79°63°31%
- Sat82°63°15%
- Sun69°58°8%
- Mon73°57°10%
- Tue77°59°13%
- Wed78°62°32%
- Thu82°65°25%
- Fri80°69°32%
- Sat85°70°24%
- Sun83°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 — LaSalle
SPC has placed LaSalle 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 LaSalle
- 61301