Lemont, Pennsylvania Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Lemont weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Foggy40%—85°68°—
- MondayJul 6Showers90%—83°69°-2°
- TuesdayJul 7Drizzle83%0.02″72°66°-11°
- WednesdayJul 8Light Drizzle38%0.02″71°63°-1°
- ThursdayJul 9Overcast42%—87°65°+16°
- FridayJul 10Light Drizzle49%0.01″72°61°-15°
- SaturdayJul 11Overcast26%—79°54°+7°
AQI 40 (Good), driven by PM2.5. AQI down 22 over the last 6 hours — air quality is improving sharply. PM2.5 at 8.5 µg/m³ (AQI 47) with a 0.99 fine-to-coarse ratio and 2 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.
What's driving it
PM × Wind × Precip
PM2.5 at 8.5 µg/m³ (AQI 47) with a 0.99 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.99
- Wind
- calm
- 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
- 11:29 PM
- Moonset
- 11:20 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Lemont at a glance
- Today vs. normal: 71°F — typical for the season
- Last frost: April 21 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 16851
15-Day Forecast — Lemont
- Sun85°68°40%
- Mon83°69°90%
- Tue72°66°83%
- Wed71°63°38%
- Thu87°65°42%
- Fri72°61°49%
- Sat79°54°26%
- Sun66°61°14%
- Mon79°61°13%
- Tue83°58°14%
- Wed77°64°18%
- Thu86°64°32%
- Fri77°65°29%
- Sat82°63°35%
- Sun85°62°40%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 — Lemont
SPC has placed Lemont 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 Lemont
- 16851
- 16801