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Clarks Summit, Pennsylvania Weather

Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →

Clarks Summit weather forecast — hour by hour, 7-day outlook, NOAA radar

Clarks Summit, PA
Saturday, July 4 at 8:04 AM
76
°
Clear
Feels like
81°
Humidity
78%
Wind
6 mph
Sunrise
1:34 AM
Sunset
4:39 PM
Clarks Summit, PA
Hour by hour · 24h
24-Hour ForecastClarks Summit, PA: 24-hour forecast. Temperatures range from 67 to 92 degrees Fahrenheit with a 38% chance of precipitation at 9 PM.
L 67°H 92°
Clarks Summit, PA
7-day forecast
  1. Today
    Jul 4
    Light Rain
    38%
    0.07″
    92°70°—
  2. Sunday
    Jul 5
    Light Rain
    88%
    0.10″
    88°67°-4°
  3. Monday
    Jul 6
    Heavy Drizzle
    88%
    0.15″
    69°60°-19°
  4. Tuesday
    Jul 7
    Foggy
    53%
    —
    77°58°+8°
  5. Wednesday
    Jul 8
    Overcast
    16%
    —
    84°54°+7°
  6. Thursday
    Jul 9
    Light Drizzle
    40%
    —
    84°59°0°
  7. Friday
    Jul 10
    Light Drizzle
    44%
    —
    80°64°-4°
Clarks Summit, PA
Next 24 hours · Mild now
HOT 90°60°80°100°6a12p6p12anow 76°high 92°low 67°PRECIP %
Clarks Summit, PA
Anemometer · 24h winds · from true
NESW
From · True
WSW
248° · backing 18°
Direction
WSW
248°
Sustained
6
mph
Gust
15
mph
Peak 24h
32
avg 7
Beaufort · 2 · LIGHT BRZ
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 7 · pk 32 @ 6:00p
0102030MPHB1B2B3B4B5B6-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 266SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 18° from the wsw.
Clarks Summit, PA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
970.3
+1.5 mb in 3h · rising · 28.65 inHg
Now
970.3
mb
3h
+1.5
mb
12h
+0.1
mb
24h
-2.6
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 969–973
960965970975980-21h-18h-15h-12h-9h-6h-3h-24hNOW973.3968.8970.3
−24h−18h−12h−6hnow
The low is filling — pressure climbing out of storm territory.
Clarks Summit, PA
Air quality
37
AQI
Good
→-2 in 6h▲Peak ~48 @ 6 PM

AQI 37 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 43 now. With UV 4.7 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 19 around 1 PM.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 6 PM.

PM 2.5Good
4.8μg/m³
PM 10Good
5μg/m³
NO₂Good
2μg/m³
OzoneDRIVERModerate
92μg/m³
UV IndexLow
1.4

What's driving it

Ozone × UV × Sky

Ozone at AQI 43 now. With UV 4.7 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 19 around 1 PM.

Present
AQI 43
UV peak
4.7 at 1 PM
Sky at peak
partly cloudy
Projected peak
AQI 19

PM × Wind × Precip

PM2.5 at 4.8 µg/m³ (AQI 27) with a 0.94 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.94
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).

7-DAY AQI TREND50100SATSUNMONTUEWEDTHUFRISAT7-DAY PM2.5 TREND · μg/m³300
Clarks Summit, PA
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
38.3mi
UNLIMITED
111 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
12:04 UTC · Clarks Summit, 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
12:04 UTC · Clarks Summit, PA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Clarks Summit, PA
Satellite · infrared · animated
Clarks Summit, PA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Clarks Summit, PA
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:01 AM
Sunrise
1:34 AM
Daylight
15h 05m
Sunset
4:39 PM
Civil dusk
9:14 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Clarks Summit, PA
The moon
Waning Gibbous
82% illuminated
Moonrise
10:58 PM
Moonset
10:04 AM
In sign
♓︎ Pisces
Clarks Summit, PA
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Clarks Summit at a glance

  • Today vs. normal: 6°F above the seasonal normal for this latitude
  • Last frost: April 25 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 18411

16-Day Forecast — Clarks Summit

  1. Sat92°70°38%
  2. Sun88°67°88%
  3. Mon69°60°88%
  4. Tue77°58°53%
  5. Wed84°54°16%
  6. Thu84°59°40%
  7. Fri80°64°44%
  8. Sat87°64°25%
  9. Sun67°61°32%
  10. Mon66°60°24%
  11. Tue78°59°27%
  12. Wed86°60°27%
  13. Thu91°65°27%
  14. Fri89°67°39%
  15. Sat82°66°40%
  16. Sun84°60°39%

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 — Clarks Summit

SPC has placed Clarks Summit in the Slight Risk category for severe thunderstorms today.

  • TODAYSLGTSlight Risk
  • TOMORROWTSTMGeneral Thunderstorms
  • 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.

January 1–5: The year turns in silence.January 6–10: Ice thickens on still water.January 11–15: Shortest shadows lengthen.January 16–20: Pheasants begin to call.January 21–25: Springs begin to thaw.January 26–31: Chickadees announce dawn.February 1–5: East wind softens the frost.February 6–10: Sap begins to rise.February 11–15: First snowdrops appear.February 16–20: Red-winged blackbirds return.February 21–25: Rain begins to replace snow.February 26–28: Skunk cabbage pushes through ice.March 1–5: Ice withdraws from the reservoir.March 6–10: Crocuses open to weak sun.March 11–15: Peepers call from the marsh.March 16–20: Woodcocks spiral at dusk.March 21–25: Equinox — light overtakes dark.March 26–31: Forsythia opens along the fences.April 1–5: Cherry blossoms drift like snow.April 6–10: Warblers appear in the understory.April 11–15: Magnolias bloom and fall in a day.April 16–20: Dogwoods float above the forest.April 21–25: Lilacs perfume the evening.April 26–30: Last frost releases the garden.May 1–5: Warblers flood the Ramble.May 6–10: Tulip poplars light their candles.May 11–15: Shad run up the rivers.May 16–20: Roses open along the stoops.May 21–25: Firefly scouts appear at dusk.May 26–31: Strawberries ripen in the sun.June 1–5: Fireflies rise from the lawn.June 6–10: Elderflowers open in hedgerows.June 11–15: Solstice approaches — longest light.June 16–20: Honeysuckle sweetens the night.June 21–25: Solstice — the sun stands still.June 26–30: Lightning bugs drift through oaks.July 1–5: Cicadas claim the afternoon.July 6–10: Queen Anne's lace lines the roads.July 11–15: Thunder builds each afternoon.July 16–20: Corn reaches for the tassels.July 21–25: Dog days settle in the haze.July 26–31: Katydids begin their chorus.August 1–5: Night falls a minute earlier.August 6–10: Sunflowers face the morning.August 11–15: Goldenrod begins to bloom.August 16–20: Crickets pulse through warm nights.August 21–25: First cool morning surprises.August 26–31: Monarchs stage for flight.September 1–5: School buses reappear.September 6–10: Asters purple the roadsides.September 11–15: Hawk migration over the Hudson.September 16–20: Equinox — dark overtakes light.September 21–25: Apples hang heavy on the branch.September 26–30: Geese begin to chevron south.October 1–5: Witch hazel blooms as others fade.October 6–10: Maples begin to blaze.October 11–15: Frost paints the garden black.October 16–20: Oaks turn bronze and russet.October 21–25: Leaves rattle down the gutters.October 26–31: Clocks fall back — dusk at five.November 1–5: Ginkgos drop overnight.November 6–10: Last leaves cling stubbornly.November 11–15: Juncos arrive from the north.November 16–20: Bare branches reveal the sky.November 21–25: First flurries dust the rooftops.November 26–30: Woodsmoke curls through the block.December 1–5: Darkness settles before dinner.December 6–10: Holly and winterberry persist.December 11–15: Shortest day approaches.December 16–20: Ice begins to form at the edges.December 21–25: Solstice — the sun begins return.December 26–31: The year turns in silence.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · July 1–5

Cicadas claim the afternoon

Annual cicada buzz begins, peaking in the heat of the day.

Day 185 of 365 · Wedge 37 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
February——
March——
Aprillettuce, peas, spinach, radishes—
Maylettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Junetomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
August—tomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
November——
December——

A year in weather

Clarks Summit's warmest month is July (~74°F mean) and its coldest is January (~28°F). Rainfall peaks in September (4.2 inches) and bottoms out in February (2.1 inches).

MonthMean tempPrecipRainy days
January28°2.6″6
February30°2.1″6
March38°2.8″7
April50°3.3″7
May61°3.3″8
June69°3.8″8
July74°3.6″7
August72°3.9″7
September65°4.2″6
October53°3.7″6
November43°2.9″6
December33°2.8″6

Regional context

Drawing on NOAA NCEI 1991-2020 normals, Clarks Summit's January averages 28°F and July 74°F — 46°F apart — while precipitation totals roughly 38.7 inches over some 80 days.

Precipitation in Clarks Summit runs summer-dominant: September averages 4.2 inches across 6.4 days of warm-season storms, while February drops to 2.1 inches over 5.5 rainy days of drier cool air. That summer-storm rhythm groups Clarks Summit with places like Clarks Green, PA, Chinchilla, PA and Dalton, PA.

The cool-season window in Clarks Summit starts at mid-April, when nights stop freezing — think kale, peas, spinach, and parsnips. Warm-soil crops in Clarks Summit wait about two weeks past Clarks Summit's last frost, once the soil warms. It shuts near mid-November, when freezes return to Clarks Summit and tender plants need cover. Within Clarks Summit, cold-air pooling chills low spots by 5-10°F, shifting Clarks Summit's local frost dates.

Similar climates: Clarks Green, PA, Chinchilla, PA, Dalton, PA, Dickson City, PA, Blakely, PA.

Frequently asked

When does it freeze in Clarks Summit?
Clarks Summit's last spring frost lands near mid-April, and in Clarks Summit the first fall frost follows around mid-November.
What is the rainy season in Clarks Summit?
Rainfall in Clarks Summit peaks in September near 4.2 inches, out of about 39 inches annually.
What is the warmest month in Clarks Summit?
The warmest stretch in Clarks Summit comes in July, around 74°F on average.
What is the coldest month in Clarks Summit?
On average January is the chilliest month in Clarks Summit, about 28°F.
When can I start a vegetable garden in Clarks Summit?
Frost-hardy sowings begin at mid-April in Clarks Summit; warm-season starts follow two weeks on.
How many rainy days does Clarks Summit get?
Clarks Summit averages about 80 days with measurable rain or snow each year.
What hardiness zone is Clarks Summit?
Clarks Summit's hardiness zone tracks its winter low; with January near 28°F, check the USDA ZIP map for the exact zone.
What is the 10-day forecast for Clarks Summit?
Clarks Summit's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
Will it rain this week in Clarks Summit?
See this week's day-by-day rain chances for Clarks Summit in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Clarks Summit?
Current conditions for Clarks Summit and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Clarks Summit forecast updated?
The Clarks Summit forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Clarks Summit?
Today's sunrise and sunset times for Clarks Summit are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
How accurate is the weather forecast for Clarks Summit?
The next few days in Clarks Summit's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Clarks Summit, Pennsylvania occupies a warm-summer humid continental zone, with January means near 28°F and July around 74°F — a 46°F swing.

Yearly precipitation in Clarks Summit totals around 39 inches, spread over about 80 days of rain or snow.

Latitude 41.5°N gives Clarks Summit its 46°F swing, and with it the rhythm of Clarks Summit's growing season.

All cities in Pennsylvania →

Scranton, PA weather →

ZIP codes in Clarks Summit

  • 18411

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.