Weather StoryAlmanac, microseasons, and the day's weather story.

Merion Station, Pennsylvania Weather

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

Merion Station weather forecast — hour by hour, 7-day outlook, NOAA radar

Merion Station, PA
Saturday, July 4 at 7:16 AM
78
°
Clear
Feels like
85°
Humidity
77%
Wind
3 mph
Sunrise
1:37 AM
Sunset
4:33 PM
Merion Station, PA
Hour by hour · 24h
24-Hour ForecastMerion Station, PA: 24-hour forecast. Temperatures range from 75 to 102 degrees Fahrenheit with a 41% chance of precipitation at 10 PM.
L 75°H 102°
Merion Station, PA
7-day forecast
  1. Today
    Jul 4
    Light Drizzle
    41%
    —
    102°75°—
  2. Sunday
    Jul 5
    Heavy Rain
    89%
    1.00″
    96°70°-6°
  3. Monday
    Jul 6
    T-storm w/ Hail
    89%
    0.03″
    83°71°-13°
  4. Tuesday
    Jul 7
    Light Showers
    72%
    —
    79°69°-4°
  5. Wednesday
    Jul 8
    Light Drizzle
    16%
    0.03″
    81°65°+2°
  6. Thursday
    Jul 9
    Overcast
    28%
    —
    92°69°+11°
  7. Friday
    Jul 10
    Light Drizzle
    34%
    0.01″
    87°73°-5°
Merion Station, PA
Next 24 hours · Mild now
HOT 90°65°88°110°6a12p6p12anow 77°high 102°low 75°PRECIP %
Merion Station, PA
Anemometer · 24h winds · from true
NESW
From · True
WSW
243° · backing 58°
Direction
WSW
243°
Sustained
3
mph
Gust
7
mph
Peak 24h
28
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 28 @ 8:00p
010203040MPHB1B2B3B4B5B6B7B8-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 331SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 58° from the wsw.
Merion Station, PA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1004.3
0.0 mb in 3h · steady · 29.66 inHg
Now
1004.3
mb
3h
0.0
mb
12h
+1.2
mb
24h
-2.5
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1003–1007
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR-21h-18h-15h-12h-9h-6h-3h-24hNOW1006.91003.01004.2
−24h−18h−12h−6hnow
Damp, unsettled regime — wet weather lingers nearby.
Merion Station, PA
Air quality
63
AQI
Moderate
↑+8 in 6h

AQI 63 (Moderate), driven by PM2.5. AQI up 8 over the last 6 hours (gradual rise). PM2.5 at 22.3 µg/m³ (AQI 76) with a 0.91 fine-to-coarse ratio and 3 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 2.5DRIVERModerate
22.3μg/m³
PM 10Good
25μg/m³
NO₂Good
15μg/m³
OzoneModerate
74μg/m³
UV IndexLow
0.5

What's driving it

Ozone × UV × Sky

Ozone at AQI 35 now. With UV 1.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 8 around 1 PM.

Present
AQI 35
UV peak
1.7 at 1 PM
Sky at peak
clear
Projected peak
AQI 8

PM × Wind × Precip

PM2.5 at 22.3 µg/m³ (AQI 76) with a 0.91 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.91
Wind
calm
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/m³450
Merion Station, PA
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
40.6mi
UNLIMITED
92 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
11:16 UTC · Merion Station, 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
11:16 UTC · Merion Station, PA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Merion Station, PA
Satellite · infrared · animated
Merion Station, PA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Merion Station, PA
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:05 AM
Sunrise
1:37 AM
Daylight
14h 56m
Sunset
4:33 PM
Civil dusk
9:07 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Merion Station, PA
The moon
Waning Gibbous
82% illuminated
Moonrise
10:54 PM
Moonset
10:04 AM
In sign
♓︎ Pisces
Merion Station, PA
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Merion Station at a glance

  • Today vs. normal: 6°F above the seasonal normal for this latitude
  • Last frost: April 16 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 19066

15-Day Forecast — Merion Station

  1. Sat102°75°41%
  2. Sun96°70°89%
  3. Mon83°71°89%
  4. Tue79°69°72%
  5. Wed81°65°16%
  6. Thu92°69°28%
  7. Fri87°73°34%
  8. Sat89°73°34%
  9. Sun79°71°32%
  10. Mon84°69°17%
  11. Tue89°73°16%
  12. Wed80°69°24%
  13. Thu86°65°23%
  14. Fri90°69°34%
  15. Sat75°70°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 — Merion Station

SPC has placed Merion Station 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

July is Merion Station's warmest stretch (~77°F) and January its coldest (~31°F); precipitation crests in December at 4.2 inches and ebbs in February to 2.9 inches.

MonthMean tempPrecipRainy days
January31°3.4″13
February33°2.9″12
March42°3.7″15
April53°3.9″17
May61°3.7″17
June71°3.7″17
July77°3.3″16
August75°4.0″17
September69°3.7″13
October58°3.0″11
November45°3.6″13
December36°4.2″13

Regional context

Merion Station swings from 31°F in January to 77°F in July (46°F) per NOAA NCEI 1991-2020 normals; precipitation in Merion Station runs about 43.1 inches on roughly 173 measurable days.

Merion Station's precipitation spreads evenly: December peaks at 4.2 inches on 13.0 wet days, while February holds 2.9 inches over 12.4 — no month dominates Merion Station's rain calendar. It is a balanced pattern Merion Station shares with places like Narberth, PA, Wynnewood, PA and Bala Cynwyd, PA.

Merion Station reaches its last hard frost near mid-April; that is the cue for peas, lettuce, spinach, and radishes. Heat-demanding starts go out a fortnight on in Merion Station, after the soil warms and cold snaps clear. By mid-November, frost is back in Merion Station — protect or harvest anything tender. Merion Station's low ground holds frost later into spring than Merion Station's benches, which run 3-5 days ahead.

Similar climates: Narberth, PA, Wynnewood, PA, Bala Cynwyd, PA, Penn Wynne, PA, Ardmore, PA.

Frequently asked

When does it freeze in Merion Station?
Frost typically leaves Merion Station by mid-April and returns to Merion Station near mid-November.
What is the rainy season in Merion Station?
December is the wettest month in Merion Station, about 4.2 inches on average; the year totals roughly 43 inches.
What is the warmest month in Merion Station?
Merion Station peaks in July, when the mean runs near 77°F.
What is the coldest month in Merion Station?
January is Merion Station's coldest month, averaging about 31°F.
When can I start a vegetable garden in Merion Station?
In Merion Station, sow peas and hardy greens around mid-April; Merion Station's tomatoes and peppers wait two weeks more.
How many rainy days does Merion Station get?
Expect roughly 173 wet days a year in Merion Station.
What hardiness zone is Merion Station?
Since January in Merion Station averages 31°F, Merion Station's USDA zone follows that floor — confirm it by ZIP.
What is the 10-day forecast for Merion Station?
Merion Station'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 Merion Station?
See this week's day-by-day rain chances for Merion Station in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Merion Station?
Current conditions for Merion Station and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Merion Station forecast updated?
The Merion Station forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Merion Station?
Today's sunrise and sunset times for Merion Station 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 Merion Station?
The next few days in Merion Station's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

In Merion Station, Pennsylvania, the warm-summer humid continental climate runs from about 31°F in January to 77°F in July, a 46°F seasonal range.

Across the year, Merion Station collects about 43 inches of precipitation over roughly 173 days with measurable rain or snow.

From 40.0°N, Merion Station sees a 46°F seasonal swing that governs Merion Station's planting and frost windows.

All cities in Pennsylvania →

Philadelphia, PA weather →

ZIP codes in Merion Station

  • 19066

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.