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Glen Lyon, Pennsylvania Weather

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

Glen Lyon weather forecast — hour by hour, 7-day outlook, NOAA radar

Glen Lyon, PA
Saturday, July 4 at 8:31 AM
78
°
Overcast
Feels like
82°
Humidity
65%
Wind
5 mph
Sunrise
1:37 AM
Sunset
4:40 PM
Glen Lyon, PA
Hour by hour · 24h
24-Hour ForecastGlen Lyon, PA: 24-hour forecast. Temperatures range from 69 to 94 degrees Fahrenheit with a 34% chance of precipitation at 8 PM.
L 69°H 94°
Glen Lyon, PA
7-day forecast
  1. Today
    Jul 4
    Overcast
    34%
    —
    94°70°—
  2. Sunday
    Jul 5
    Rain
    92%
    0.17″
    90°69°-4°
  3. Monday
    Jul 6
    Heavy Drizzle
    92%
    0.34″
    69°61°-21°
  4. Tuesday
    Jul 7
    Light Drizzle
    55%
    0.02″
    76°58°+7°
  5. Wednesday
    Jul 8
    Overcast
    15%
    —
    83°55°+7°
  6. Thursday
    Jul 9
    Light Drizzle
    39%
    0.01″
    88°59°+5°
  7. Friday
    Jul 10
    Light Drizzle
    45%
    —
    81°65°-7°
Glen Lyon, PA
Next 24 hours · Mild now
HOT 90°60°80°100°6a12p6p12anow 76°high 94°low 69°PRECIP %
Glen Lyon, PA
Anemometer · 24h winds · from true
NESW
From · True
WSW
240° · veering 9°
Direction
WSW
240°
Sustained
5
mph
Gust
11
mph
Peak 24h
22
avg 6
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 6 · pk 22 @ 6:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 206SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 9° from the wsw.
Glen Lyon, PA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
975.6
+1.4 mb in 3h · rising · 28.81 inHg
Now
975.6
mb
3h
+1.4
mb
12h
+0.3
mb
24h
-2.7
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 974–978
965970975980985-21h-18h-15h-12h-9h-6h-3h-24hNOW978.3973.9975.3
−24h−18h−12h−6hnow
The low is filling — pressure climbing out of storm territory.
Glen Lyon, PA
Air quality
50
AQI
Good
→+3 in 6h▲Peak ~60 @ 7 PM

AQI 50 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 46 now. With UV 4.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 29 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 7 PM.

PM 2.5Good
7.3μg/m³
PM 10Good
8μg/m³
NO₂Good
2μg/m³
OzoneDRIVERModerate
98μg/m³
UV IndexLow
1.4

What's driving it

Ozone × UV × Sky

Ozone at AQI 46 now. With UV 4.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 29 around 1 PM.

Present
AQI 46
UV peak
4.7 at 1 PM
Sky at peak
clear
Projected peak
AQI 29

PM × Wind × Precip

PM2.5 at 7.3 µg/m³ (AQI 41) with a 0.91 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.91
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/m³370
Glen Lyon, PA
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
49.1mi
UNLIMITED
96 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
12:31 UTC · Glen Lyon, 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
12:31 UTC · Glen Lyon, PA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Glen Lyon, PA
Satellite · infrared · animated
Glen Lyon, PA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Glen Lyon, PA
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:04 AM
Sunrise
1:37 AM
Daylight
15h 03m
Sunset
4:40 PM
Civil dusk
9:15 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Glen Lyon, PA
The moon
Waning Gibbous
82% illuminated
Moonrise
10:59 PM
Moonset
10:06 AM
In sign
♓︎ Pisces
Glen Lyon, PA
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Glen Lyon at a glance

  • Today vs. normal: 8°F above the seasonal normal for this latitude
  • Last frost: April 23 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 18617

16-Day Forecast — Glen Lyon

  1. Sat94°70°34%
  2. Sun90°69°92%
  3. Mon69°61°92%
  4. Tue76°58°55%
  5. Wed83°55°15%
  6. Thu88°59°39%
  7. Fri81°65°45%
  8. Sat85°66°28%
  9. Sun67°63°27%
  10. Mon71°62°21%
  11. Tue83°61°22%
  12. Wed85°61°26%
  13. Thu92°66°32%
  14. Fri89°69°35%
  15. Sat82°68°43%
  16. Sun87°62°36%

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 — Glen Lyon

SPC has placed Glen Lyon 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

In Glen Lyon, July runs warmest near 69°F and January coldest around 25°F, while September is the wettest month (4.9 inches) and February the driest (2.5 inches).

MonthMean tempPrecipRainy days
January25°3.2″6
February27°2.5″5
March35°3.4″7
April46°4.4″7
May57°4.7″9
June65°4.5″9
July69°4.5″9
August68°4.5″7
September61°4.9″7
October50°4.8″8
November40°3.4″5
December30°3.6″7

Regional context

Glen Lyon swings from 25°F in January to 69°F in July (45°F) per NOAA NCEI 1991-2020 normals; precipitation in Glen Lyon runs about 48.4 inches on roughly 85 measurable days.

Precipitation in Glen Lyon runs summer-dominant: September averages 4.9 inches across 6.6 days of warm-season storms, while February drops to 2.5 inches over 4.6 rainy days of drier cool air. It is a warm-season-wet pattern Glen Lyon shares with places like Wanamie, PA, Sheatown, PA and Mocanaqua, PA.

Around mid-April, Glen Lyon sheds its freezing nights — kale, peas, spinach, and parsnips go into Glen Lyon's beds. Heat-demanding starts go out a fortnight on in Glen Lyon, after the soil warms and cold snaps clear. By mid-November, frost is back in Glen Lyon — protect or harvest anything tender. Glen Lyon's low ground holds frost later into spring than Glen Lyon's benches, which run 3-5 days ahead.

Similar climates: Wanamie, PA, Sheatown, PA, Mocanaqua, PA, Shickshinny, PA, Nanticoke, PA.

Frequently asked

When does it freeze in Glen Lyon?
In Glen Lyon, expect the last spring frost near mid-April; Glen Lyon's first autumn frost comes around mid-November.
What is the rainy season in Glen Lyon?
Rainfall in Glen Lyon peaks in September near 4.9 inches, out of about 48 inches annually.
What is the warmest month in Glen Lyon?
On average July tops the year in Glen Lyon at about 69°F.
What is the coldest month in Glen Lyon?
The coldest stretch in Glen Lyon falls in January, around 25°F on average.
When can I start a vegetable garden in Glen Lyon?
Hardy spring crops go in near mid-April in Glen Lyon; tender peppers and squash wait 10–14 days.
How many rainy days does Glen Lyon get?
Expect roughly 85 wet days a year in Glen Lyon.
What hardiness zone is Glen Lyon?
With January around 25°F, Glen Lyon's zone reflects that minimum — the USDA ZIP map confirms Glen Lyon's band.
What is the 10-day forecast for Glen Lyon?
Glen Lyon'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 Glen Lyon?
See this week's day-by-day rain chances for Glen Lyon in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Glen Lyon?
Current conditions for Glen Lyon and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Glen Lyon forecast updated?
The Glen Lyon forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Glen Lyon?
Today's sunrise and sunset times for Glen Lyon 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 Glen Lyon?
The next few days in Glen Lyon's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Set in a warm-summer humid continental zone, Glen Lyon, Pennsylvania swings from 25°F in the heart of winter to 69°F at midsummer — a 44°F arc.

In a typical year Glen Lyon records about 48 inches of precipitation on around 85 days.

Glen Lyon sits at 41.2°N; that 44°F seasonal swing frames planting windows and frost dates across Glen Lyon.

All cities in Pennsylvania →

Scranton, PA weather →

ZIP codes in Glen Lyon

  • 18617

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.