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

Perth Amboy, New Jersey Weather

Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →

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

Perth Amboy, NJ
Sunday, July 5 at 7:29 AM
75
°
Partly Cloudy
Feels like
82°
Humidity
89%
Wind
5 mph
Sunrise
1:32 AM
Sunset
4:30 PM
Perth Amboy, NJ
Hour by hour · 24h
24-Hour ForecastPerth Amboy, NJ: 24-hour forecast. Temperatures range from 71 to 87 degrees Fahrenheit with a 74% chance of precipitation at 12 AM.
L 71°H 87°
Perth Amboy, NJ
7-day forecast
  1. Today
    Jul 5
    Rain
    73%
    0.29″
    87°73°—
  2. Monday
    Jul 6
    Rain
    94%
    0.70″
    74°71°-13°
  3. Tuesday
    Jul 7
    Drizzle
    88%
    0.05″
    71°65°-3°
  4. Wednesday
    Jul 8
    Overcast
    21%
    —
    74°65°+3°
  5. Thursday
    Jul 9
    Overcast
    16%
    —
    80°65°+6°
  6. Friday
    Jul 10
    Light Drizzle
    34%
    —
    87°69°+7°
  7. Saturday
    Jul 11
    Overcast
    24%
    —
    79°66°-8°
Perth Amboy, NJ
Next 24 hours · Mild now
HOT 90°68°80°92°6a12p6p12anow 75°high 87°low 71°PRECIP %
Perth Amboy, NJ
Anemometer · 24h winds · from true
NESW
From · True
SSW
209° · backing 30°
Direction
SSW
209°
Sustained
5
mph
Gust
7
mph
Peak 24h
26
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 26 @ 12:00a
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 1710SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Perth Amboy, NJ
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1011.5
+2.2 mb in 3h · rising rapidly · 29.87 inHg
Now
1011.5
mb
3h
+2.2
mb
12h
+4.2
mb
24h
+1.2
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1007–1012
1000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1012.31007.11011.3
−24h−18h−12h−6hnow
Pressure climbing through the change line — drier air pushing in.
Perth Amboy, NJ
Air quality
43
AQI
Good
↓-22 in 6h▲Peak ~49 @ 5 PM

AQI 43 (Good), driven by PM2.5. AQI down 22 over the last 6 hours — air quality is improving sharply. PM2.5 at 18.5 µg/m³ (AQI 69) with a 0.97 fine-to-coarse ratio and 5 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 during the projected peak around 5 PM.

PM 2.5DRIVERModerate
18.5μg/m³
PM 10Good
19μg/m³
NO₂Moderate
25μg/m³
OzoneGood
43μg/m³
UV IndexLow
0.1

What's driving it

PM × Wind × Precip

PM2.5 at 18.5 µg/m³ (AQI 69) with a 0.97 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.97
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 TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³770
Perth Amboy, NJ
Sky cover · visibility · 24h
Cloud cover
72%
MOSTLY CLOUDY
100%0%−24h−18h−12h−6hnow
Visibility
30.4mi
UNLIMITED
114 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
11:29 UTC · Perth Amboy, NJ · 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
11:29 UTC · Perth Amboy, NJ · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Perth Amboy, NJ
Satellite · infrared · animated
Perth Amboy, NJ
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Perth Amboy, NJ
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:00 AM
Sunrise
1:32 AM
Daylight
14h 58m
Sunset
4:30 PM
Civil dusk
9:04 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Perth Amboy, NJ
The moon
Waning Gibbous
73% illuminated
Moonrise
11:14 PM
Moonset
11:06 AM
In sign
♓︎ Pisces
Perth Amboy, NJ
Microseason
Jul 1–5

Cicadas claim the afternoon

fish
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Perth Amboy at a glance

  • Today vs. normal: 4°F above the seasonal normal for this latitude
  • Last frost: April 19 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 08861

15-Day Forecast — Perth Amboy

  1. Sun87°73°73%
  2. Mon74°71°94%
  3. Tue71°65°88%
  4. Wed74°65°21%
  5. Thu80°65°16%
  6. Fri87°69°34%
  7. Sat79°66°24%
  8. Sun79°65°22%
  9. Mon73°63°19%
  10. Tue80°63°13%
  11. Wed83°67°15%
  12. Thu91°68°33%
  13. Fri84°71°27%
  14. Sat82°69°33%
  15. Sun86°69°32%

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

Live wind & temperature near Perth Amboy

Right now in the garden

Peak growing season

As of July 5, 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 — Perth Amboy

SPC has placed Perth Amboy in the Slight Risk category for severe thunderstorms today.

  • TODAYSLGTSlight Risk
  • TOMORROWTSTMGeneral Thunderstorms
  • 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 · July 1–5

Cicadas claim the afternoon

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

Day 186 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

Perth Amboy's warmest month is July (~77°F mean) and its coldest is January (~30°F). Rainfall peaks in December (4.2 inches) and bottoms out in February (3.0 inches).

MonthMean tempPrecipRainy days
January30°3.4″14
February32°3.0″13
March41°3.7″15
April52°3.9″17
May61°3.7″18
June70°3.8″17
July77°3.5″16
August75°4.0″17
September69°3.6″13
October58°3.1″11
November44°3.7″13
December35°4.2″13

Regional context

By the nearest station's NOAA NCEI 1991-2020 normals, Perth Amboy sees 30°F Januarys and 77°F Julys, a 46°F range, plus around 43.6 inches of precipitation across 175 days.

Perth Amboy's precipitation spreads evenly: December peaks at 4.2 inches on 13.3 wet days, while February holds 3.0 inches over 12.5 — no month dominates Perth Amboy's rain calendar. That even rhythm groups Perth Amboy with places like Hopelawn, NJ, Keasbey, NJ and Sewaren, NJ.

Perth Amboy's growing window opens around mid-April, once Perth Amboy's overnight lows stop freezing — sow peas, lettuce, spinach, and radishes. Hold Perth Amboy's tender crops — tomatoes, peppers, basil — until 10-14 days past Perth Amboy's last frost. It shuts near mid-November, when freezes return to Perth Amboy and tender plants need cover. Within Perth Amboy, cold-air pooling chills low spots by 5-10°F, shifting Perth Amboy's local frost dates.

Similar climates: Hopelawn, NJ, Keasbey, NJ, Sewaren, NJ, Fords, NJ, South Amboy, NJ.

Frequently asked

When does it freeze in Perth Amboy?
Frost typically leaves Perth Amboy by mid-April and returns to Perth Amboy near mid-November.
What is the rainy season in Perth Amboy?
Perth Amboy sees its heaviest rain in December (around 4.2 inches), part of roughly 44 inches a year.
What is the warmest month in Perth Amboy?
Perth Amboy peaks in July, when the mean runs near 77°F.
What is the coldest month in Perth Amboy?
January is Perth Amboy's coldest month, averaging about 30°F.
When can I start a vegetable garden in Perth Amboy?
Around mid-April, start frost-hardy crops in Perth Amboy; tomatoes and basil belong a fortnight later.
How many rainy days does Perth Amboy get?
Perth Amboy records around 175 days of measurable precipitation annually.
What hardiness zone is Perth Amboy?
With January around 30°F, Perth Amboy's zone reflects that minimum — the USDA ZIP map confirms Perth Amboy's band.
What is the 10-day forecast for Perth Amboy?
Perth Amboy'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 Perth Amboy?
See this week's day-by-day rain chances for Perth Amboy in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Perth Amboy?
Current conditions for Perth Amboy and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Perth Amboy forecast updated?
The Perth Amboy forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Perth Amboy?
Today's sunrise and sunset times for Perth Amboy 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 Perth Amboy?
The next few days in Perth Amboy's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

The warm-summer humid continental climate of Perth Amboy, New Jersey carries typical Januarys near 30°F and Julys around 77°F — 47°F of seasonal travel.

Yearly precipitation in Perth Amboy totals around 44 inches, spread over about 175 days of rain or snow.

Perth Amboy sits at 40.5°N; that 47°F seasonal swing frames planting windows and frost dates across Perth Amboy.

Beaches near Perth Amboy

Each linked page shows live water temperature, wave height, swim and surf verdicts, tides, and rip-current risk from NDBC + NOAA + NWS data.

All cities in New Jersey →

Staten Island, NY weather →

ZIP codes in Perth Amboy

  • 08861
  • 08862

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.