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 4Drizzle59%0.05″93°68°—
- SundayJul 5Light Drizzle45%0.02″88°68°-5°
- MondayJul 6Light Showers80%0.03″78°66°-10°
- TuesdayJul 7Heavy Drizzle80%0.01″72°64°-6°
- WednesdayJul 8Light Drizzle18%0.04″67°64°-5°
- ThursdayJul 9Light Showers16%0.17″87°65°+20°
- FridayJul 10Thunderstorm60%—77°66°-10°
AQI 68 (Moderate), driven by Ozone. AQI up 19 in the last 6 hours — air quality is degrading. Ozone at AQI 43. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 43
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 5
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: 4°F above the seasonal normal for this latitude
- 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
16-Day Forecast — Lemont
- Sat93°68°59%
- Sun88°68°45%
- Mon78°66°80%
- Tue72°64°80%
- Wed67°64°18%
- Thu87°65°16%
- Fri77°66°60%
- Sat80°58°30%
- Sun78°55°18%
- Mon80°51°26%
- Tue85°58°21%
- Wed83°59°35%
- Thu79°56°39%
- Fri84°55°35%
- Sat85°64°51%
- Sun82°67°39%
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 Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWMRGLMarginal Risk
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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