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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

Lemont, PA
Sunday, July 5 at 3:43 AM
71
°
Mostly Clear
Feels like
77°
Humidity
92%
Wind
2 mph
Sunrise
1:45 AM
Sunset
4:45 PM
Lemont, PA
Hour by hour · 24h
24-Hour ForecastLemont, PA: 24-hour forecast. Temperatures range from 68 to 85 degrees Fahrenheit with a 40% chance of precipitation at 5 PM.
L 68°H 85°
Lemont, PA
7-day forecast
  1. Today
    Jul 5
    Foggy
    40%
    85°68°
  2. Monday
    Jul 6
    Showers
    90%
    83°69°-2°
  3. Tuesday
    Jul 7
    Drizzle
    83%
    0.02″
    72°66°-11°
  4. Wednesday
    Jul 8
    Light Drizzle
    38%
    0.02″
    71°63°-1°
  5. Thursday
    Jul 9
    Overcast
    42%
    87°65°+16°
  6. Friday
    Jul 10
    Light Drizzle
    49%
    0.01″
    72°61°-15°
  7. Saturday
    Jul 11
    Overcast
    26%
    79°54°+7°
Lemont, PA
Anemometer · 24h winds · from true
NESW
From · True
NNE
027° · backing 146°
Direction
NNE
027°
Sustained
2
mph
Gust
2
mph
Peak 24h
35
avg 6
Beaufort · 1 · LIGHT AIR
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 6 · pk 35 @ 7:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 192SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Lemont, PA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
975.4
-0.8 mb in 3h · falling · 28.80 inHg
Now
975.4
mb
3h
-0.8
mb
12h
-1.8
mb
24h
-1.2
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 975979
970975980985-21h-18h-15h-12h-9h-6h-3h-24hNOW978.7975.3975.6
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Lemont, PA
Air quality
40
AQI
Good
-22 in 6h

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.

PM 2.5DRIVERGood
8.5μg/m³
PM 10Good
9μg/m³
NO₂Good
7μg/m³
OzoneGood
59μg/m³
UV IndexLow
0.0

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
Lemont, PA
Sky cover · visibility · 24h
Cloud cover
29%
MOSTLY CLEAR
100%0%−24h−18h−12h−6hnow

Visibility
29.2mi
UNLIMITED
97 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
07:43 UTC · Lemont, PA · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
07:43 UTC · Lemont, PA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Lemont, PA
Satellite · infrared · animated
Lemont, PA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Lemont, PA
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:13 AM
Sunrise
1:45 AM
Daylight
15h 00m
Sunset
4:45 PM
Civil dusk
9:20 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Lemont, PA
The moon
Waning Gibbous
75% illuminated
Moonrise
11:29 PM
Moonset
11:20 AM
In sign
♓︎ Pisces
Lemont, PA
Microseason
Jul 1–5

Cicadas claim the afternoon

fish
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

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

  1. Sun85°68°40%
  2. Mon83°69°90%
  3. Tue72°66°83%
  4. Wed71°63°38%
  5. Thu87°65°42%
  6. Fri72°61°49%
  7. Sat79°54°26%
  8. Sun66°61°14%
  9. Mon79°61°13%
  10. Tue83°58°14%
  11. Wed77°64°18%
  12. Thu86°64°32%
  13. Fri77°65°29%
  14. Sat82°63°35%
  15. 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

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.