Lerna, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Lerna weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle46%0.01″90°71°—
- SundayJul 5Overcast39%—80°71°-10°
- MondayJul 6Overcast13%—84°67°+4°
- TuesdayJul 7Overcast——82°64°-2°
- WednesdayJul 8Clear17%—84°63°+2°
- ThursdayJul 9Drizzle32%—86°70°+2°
- FridayJul 10Drizzle35%0.02″83°67°-3°
AQI 30 (Good), driven by PM2.5. AQI down 9 over the last 6 hours (gradual decline). PM2.5 at 5.5 µg/m³, PM10 at 6.0 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 7 PM.
What's driving it
PM × Wind × Precip
PM2.5 at 5.5 µg/m³, PM10 at 6.0 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.92
- 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
- 10:47 PM
- Moonset
- 10:00 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Lerna at a glance
- Today vs. normal: 3°F above the seasonal normal for this latitude
- Last frost: April 13 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 62440
16-Day Forecast — Lerna
- Sat90°71°46%
- Sun80°71°39%
- Mon84°67°13%
- Tue82°64°7%
- Wed84°63°17%
- Thu86°70°32%
- Fri83°67°35%
- Sat86°68°29%
- Sun74°59°10%
- Mon69°57°6%
- Tue77°60°7%
- Wed80°63°13%
- Thu81°65°19%
- Fri82°69°29%
- Sat85°70°29%
- Sun80°72°26%
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 — Lerna
SPC has placed Lerna in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
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 Lerna
- 62440