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State Line, Pennsylvania Weather

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

State Line weather forecast — hour by hour, 7-day outlook, NOAA radar

State Line, PA
Saturday, July 4 at 4:41 PM
97
°
Clear
Feels like
102°
Humidity
35%
Wind
5 mph
Sunrise
1:48 AM
Sunset
4:42 PM
State Line, PA
Hour by hour · 24h
24-Hour ForecastState Line, PA: 24-hour forecast. Temperatures range from 72 to 98 degrees Fahrenheit with a 34% chance of precipitation at 10 PM.
L 72°H 98°
State Line, PA
7-day forecast
  1. Today
    Jul 4
    Drizzle
    34%
    0.03″
    98°73°—
  2. Sunday
    Jul 5
    Light Drizzle
    43%
    0.01″
    92°72°-6°
  3. Monday
    Jul 6
    Thunderstorm
    82%
    0.01″
    82°69°-10°
  4. Tuesday
    Jul 7
    Heavy Showers
    80%
    1.7″
    86°64°+4°
  5. Wednesday
    Jul 8
    Light Drizzle
    17%
    0.01″
    77°63°-9°
  6. Thursday
    Jul 9
    Overcast
    19%
    —
    91°64°+14°
  7. Friday
    Jul 10
    Light Drizzle
    51%
    —
    83°66°-8°
State Line, PA
Next 24 hours · Hot now
HOT 90°65°85°105°12p6p12a6anow 97°high 98°low 72°PRECIP %
State Line, PA
Anemometer · 24h winds · from true
NESW
From · True
WSW
248° · veering 8°
Direction
WSW
248°
Sustained
5
mph
Gust
16
mph
Peak 24h
23
avg 5
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 5 · pk 23 @ 2:00a
010203040MPHB1B2B3B4B5B6B7B8-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 358SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 8° from the wsw.
State Line, PA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
989.2
-2.3 mb in 3h · falling rapidly · 29.21 inHg
Now
989.2
mb
3h
-2.3
mb
12h
-1.9
mb
24h
-2.6
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 989–993
9859909951000STORM|RAIN-21h-18h-15h-12h-9h-6h-3h-24hNOW992.7989.5989.5
−24h−18h−12h−6hnow
Deep low still deepening — rough seas, strong wind, persistent rain.
State Line, PA
Air quality
79
AQI
Moderate
↑+27 in 6h▲Peak ~88 @ 10 PM

AQI 79 (Moderate), driven by Ozone. AQI up 27 in the last 6 hours — air quality is degrading. Ozone at AQI 86 — peak already passed at 1 PM under clear skies. Levels should ease through evening.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.

PM 2.5Good
8.3μg/m³
PM 10Good
9μg/m³
NO₂Good
1μg/m³
OzoneDRIVERUnhealthy SG
129μg/m³
UV IndexModerate
4.5

What's driving it

Ozone × UV × Sky

Ozone at AQI 86 — peak already passed at 1 PM under clear skies. Levels should ease through evening.

Present
AQI 86
UV peak
4.0 at earlier today
Sky at peak
clear
Projected peak
AQI 86

PM × Wind × Precip

PM2.5 at 8.3 µg/m³ (AQI 46) with a 0.90 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.90
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/m³310
State Line, PA
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
114.2mi
UNLIMITED
110 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
20:41 UTC · State Line, 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
20:41 UTC · State Line, PA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
State Line, PA
Satellite · infrared · animated
State Line, PA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
State Line, PA
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:16 AM
Sunrise
1:48 AM
Daylight
14h 54m
Sunset
4:42 PM
Civil dusk
9:15 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
State Line, PA
The moon
Waning Gibbous
79% illuminated
Moonrise
11:04 PM
Moonset
10:14 AM
In sign
♓︎ Pisces
State Line, PA
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

State Line at a glance

  • Today vs. normal: 25°F above the seasonal normal for this latitude
  • Last frost: April 14 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 17263

16-Day Forecast — State Line

  1. Sat98°73°34%
  2. Sun92°72°43%
  3. Mon82°69°82%
  4. Tue86°64°80%
  5. Wed77°63°17%
  6. Thu91°64°19%
  7. Fri83°66°51%
  8. Sat87°66°27%
  9. Sun79°63°23%
  10. Mon81°62°19%
  11. Tue83°58°21%
  12. Wed88°60°40%
  13. Thu90°61°42%
  14. Fri86°66°38%
  15. Sat89°67°34%
  16. Sun83°69°44%

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 — State Line

SPC has placed State Line in the Slight Risk category for severe thunderstorms today.

  • TODAYSLGTSlight Risk
  • TOMORROWSLGTSlight 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.

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

In State Line, July runs warmest near 78°F and January coldest around 33°F, while September is the wettest month (3.8 inches) and February the driest (2.0 inches).

MonthMean tempPrecipRainy days
January33°2.5″5
February36°2.0″5
March43°3.0″6
April55°3.3″7
May64°3.5″8
June73°3.4″7
July78°2.9″6
August75°2.9″6
September68°3.8″6
October57°2.8″5
November46°2.6″5
December37°2.8″5

Regional context

By the nearest station's NOAA NCEI 1991-2020 normals, State Line sees 33°F Januarys and 78°F Julys, a 45°F range, plus around 35.6 inches of precipitation across 71 days.

State Line's precipitation spreads evenly: September peaks at 3.8 inches on 6.2 wet days, while February holds 2.0 inches over 4.9 — no month dominates State Line's rain calendar. That even rhythm groups State Line with places like Greencastle, PA, Waynesboro, PA and Marion, PA.

By mid-April the frosts ease in State Line, opening the season for peas, lettuce, spinach, and radishes. In State Line, warm-season transplants — tomatoes, peppers, basil — wait two weeks past State Line's frost date. It shuts near mid-November, when freezes return to State Line and tender plants need cover. In State Line, low spots run 4-7°F colder than nearby slopes, nudging State Line's frost dates a week.

Similar climates: Greencastle, PA, Waynesboro, PA, Marion, PA, Wayne Heights, PA, Rouzerville, PA.

Frequently asked

When does it freeze in State Line?
Frost typically leaves State Line by mid-April and returns to State Line near mid-November.
What is the rainy season in State Line?
Rainfall in State Line peaks in September near 3.8 inches, out of about 36 inches annually.
What is the warmest month in State Line?
July is State Line's warmest month, averaging about 78°F.
What is the coldest month in State Line?
State Line bottoms out in January, with a mean near 33°F.
When can I start a vegetable garden in State Line?
Time tomatoes in State Line for two weeks after mid-April; peas and greens start at State Line's frost line.
How many rainy days does State Line get?
Expect roughly 71 wet days a year in State Line.
What hardiness zone is State Line?
State Line's hardiness zone tracks its winter low; with January near 33°F, check the USDA ZIP map for the exact zone.
What is the 10-day forecast for State Line?
State Line'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 State Line?
See this week's day-by-day rain chances for State Line in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in State Line?
Current conditions for State Line and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the State Line forecast updated?
The State Line forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in State Line?
Today's sunrise and sunset times for State Line 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 State Line?
The next few days in State Line's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

State Line, Pennsylvania has a warm-summer humid continental climate: January averages roughly 33°F, July about 78°F, 45°F between them.

Across the year, State Line collects about 36 inches of precipitation over roughly 71 days with measurable rain or snow.

Latitude 39.7°N gives State Line its 45°F swing, and with it the rhythm of State Line's growing season.

All cities in Pennsylvania →

Hagerstown, MD weather →

ZIP codes in State Line

  • 17263
  • 17225

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.