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Coopersburg, Pennsylvania Weather

Honeysuckle sweetens the night. Day 90 of spring. Read this microseason across nine climate regions →

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

Coopersburg, PA
Wednesday, June 17 at 12:38 PM
77
°
Overcast
Feels like
78°
Humidity
55%
Wind
11 mph
Sunrise
1:30 AM
Sunset
4:34 PM
Coopersburg, PA
Hour by hour · 24h
24-Hour ForecastCoopersburg, PA: 24-hour forecast. Temperatures range from 67 to 80 degrees Fahrenheit with a 38% chance of precipitation at 10 AM.
L 67°H 80°
Coopersburg, PA
7-day forecast
  1. Today
    Jun 17
    Overcast
    12%
    —
    80°54°—
  2. Thursday
    Jun 18
    Light Drizzle
    38%
    0.01″
    89°67°+9°
  3. Friday
    Jun 19
    Heavy Drizzle
    —
    0.04″
    80°63°-9°
  4. Saturday
    Jun 20
    Overcast
    —
    —
    77°53°-3°
  5. Sunday
    Jun 21
    Rain
    23%
    0.86″
    69°54°-8°
  6. Monday
    Jun 22
    Heavy Rain
    64%
    0.86″
    75°58°+6°
  7. Tuesday
    Jun 23
    Partly Cloudy
    32%
    —
    80°54°+5°
Coopersburg, PA
Next 24 hours · Mild now
64°74°84°12p6p12a6anow 75°high 80°low 67°PRECIP %
Coopersburg, PA
Anemometer · 24h winds · from true
NESW
From · True
S
171° · backing 29°
Direction
S
171°
Sustained
11
mph
Gust
16
mph
Peak 24h
16
avg 4
Beaufort · 3 · GENTLE 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 4 · pk 16
010203040MPHB1B2B3B4B5B6B7B8-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 3515SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 29° from the s.
Coopersburg, PA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
991.3
-0.6 mb in 3h · falling · 29.27 inHg
Now
991.3
mb
3h
-0.6
mb
12h
-0.2
mb
24h
-2.2
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 991–995
9859909951000STORM|RAIN-21h-18h-15h-12h-9h-6h-3h-24hNOW994.5991.6992.3
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Coopersburg, PA
Air quality
40
AQI
Good
↑+13 in 6h▲Peak ~80 @ 11 PM

AQI 40 (Good), driven by Ozone. AQI up 13 over the last 6 hours (gradual rise). Ozone at AQI 85. Overcast through the UV peak window (cloud cover ~98%) — afternoon ozone should stay flat.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5Moderate
15.8μg/m³
PM 10Good
18μg/m³
NO₂Good
2μg/m³
OzoneDRIVERUnhealthy SG
128μg/m³
UV IndexHigh
6.5

What's driving it

Ozone × UV × Sky

Ozone at AQI 85. Overcast through the UV peak window (cloud cover ~98%) — afternoon ozone should stay flat.

Present
AQI 85
UV peak
6.7 at 1 PM
Sky at peak
overcast
Projected peak
AQI 38

PM × Wind × Precip

PM2.5 at 15.8 µg/m³, PM10 at 17.9 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.88
Wind
breezy
Recent rain
0h in last 6h
Pattern
background

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 TREND50100WEDTHUFRISATSUNMONTUEWED7-DAY PM2.5 TREND · μg/m³300
Coopersburg, PA
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
63.6mi
UNLIMITED
115 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
16:38 UTC · Coopersburg, 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
16:38 UTC · Coopersburg, PA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Coopersburg, PA
Satellite · infrared · animated
Coopersburg, PA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Coopersburg, PA
Almanac · Wednesday, June 17
A summer fog for fair, a winter fog for rain.
Civil dawn
4:58 AM
Sunrise
1:30 AM
Daylight
15h 04m
Sunset
4:34 PM
Civil dusk
9:08 PM
Planting note
Stake and prune tomato suckers. Watch for squash vine borers.
Coopersburg, PA
The moon
Waxing Crescent
9% illuminated
Moonrise
7:56 AM
Moonset
10:39 PM
In sign
♌︎ Leo
Coopersburg, PA
Microseason
Jun 16–20

Honeysuckle sweetens the night

plant
Jan 146% of the yearDec 31

Read this microseason across nine climate regions →

Coopersburg at a glance

  • Today vs. normal: 3°F above the seasonal normal for this latitude
  • Last frost: April 19 (climatological average for this latitude)
  • Microseason: Jun 16–20
  • Planting window: Stake and prune tomato suckers. Watch for squash vine borers.

16-Day Forecast — Coopersburg

  1. Wed81°54°12%
  2. Thu89°67°38%
  3. Fri80°63°4%
  4. Sat77°53°0%
  5. Sun69°54°23%
  6. Mon75°58°64%
  7. Tue80°54°32%
  8. Wed81°59°7%
  9. Thu73°64°22%
  10. Fri81°64°29%
  11. Sat87°65°28%
  12. Sun88°65°24%
  13. Mon89°68°32%
  14. Tue84°69°43%
  15. Wed74°71°43%
  16. Thu86°68°52%

Forecast data from Open-Meteo (CC BY 4.0).

Right now in the garden

Peak growing season

As of June 17, 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 — Coopersburg

SPC has placed Coopersburg in the Slight Risk category for severe thunderstorms tomorrow.

  • TODAYTSTMGeneral Thunderstorms
  • TOMORROWSLGTSlight Risk
  • DAY 3NONENo severe risk

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 · June 16–20

Honeysuckle sweetens the night

Japanese honeysuckle perfumes parks after dark.

Day 168 of 365 · Wedge 34 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

The year in Coopersburg tops out in July (~75°F) and dips lowest in January (~29°F), with December wettest at 4.3 inches and February driest at 2.9 inches.

MonthMean tempPrecipRainy days
January29°3.4″14
February31°2.9″13
March40°3.7″16
April51°4.0″17
May60°4.1″17
June69°4.1″17
July75°3.4″15
August74°4.1″18
September67°3.9″15
October56°3.2″12
November43°3.8″13
December33°4.3″14

Regional context

Coopersburg's climate, from NOAA NCEI 1991-2020 station normals, pairs 29°F Januarys with 75°F Julys — a 47°F swing. About 44.9 inches of precipitation falls over roughly 180 days a year.

Rainfall in Coopersburg stays even across the calendar: December tops out at 4.3 inches over 13.8 rainy days, and February still logs 2.9 inches across 12.8 — a narrow range for Coopersburg. That lines Coopersburg up with places like DeSales University, PA, Richlandtown, PA and Milford Square, PA, fed by overlapping storm tracks.

By mid-April the frosts ease in Coopersburg, opening the season for kale, peas, spinach, and parsnips. In Coopersburg, warm-season transplants — tomatoes, peppers, basil — wait two weeks past Coopersburg's frost date. Coopersburg's window closes around mid-November as overnight lows return below freezing. Within Coopersburg, cold-air pooling chills low spots by 5-10°F, shifting Coopersburg's local frost dates.

Similar climates: DeSales University, PA, Richlandtown, PA, Milford Square, PA, Quakertown, PA, Spinnerstown, PA.

Frequently asked

When does it freeze in Coopersburg?
Frost typically leaves Coopersburg by mid-April and returns to Coopersburg near mid-November.
What is the rainy season in Coopersburg?
December is the wettest month in Coopersburg, about 4.3 inches on average; the year totals roughly 45 inches.
What is the warmest month in Coopersburg?
The warmest stretch in Coopersburg comes in July, around 75°F on average.
What is the coldest month in Coopersburg?
On average January is the chilliest month in Coopersburg, about 29°F.
When can I start a vegetable garden in Coopersburg?
Coopersburg's last frost (mid-April) cues hardy greens; in Coopersburg, hold heat-lovers two weeks past.
How many rainy days does Coopersburg get?
Coopersburg records around 180 days of measurable precipitation annually.
What hardiness zone is Coopersburg?
Coopersburg's USDA zone comes from its January mean (29°F); enter the ZIP on the USDA lookup for the number.
What is the 10-day forecast for Coopersburg?
Coopersburg'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 Coopersburg?
See this week's day-by-day rain chances for Coopersburg in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Coopersburg?
Current conditions for Coopersburg and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Coopersburg forecast updated?
The Coopersburg forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Coopersburg?
Day length in Coopersburg peaks around the June solstice — earliest sunrise and latest sunset — and is shortest near the December solstice.
How accurate is the weather forecast for Coopersburg?
The next few days in Coopersburg's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Coopersburg, Pennsylvania occupies a warm-summer humid continental zone, with January means near 29°F and July around 75°F — a 46°F swing.

Yearly precipitation in Coopersburg totals around 45 inches, spread over about 180 days of rain or snow.

Latitude 40.5°N gives Coopersburg its 46°F swing, and with it the rhythm of Coopersburg's growing season.

All cities in Pennsylvania →

Allentown, PA weather →

ZIP codes in Coopersburg

  • 18036

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.