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Sayreville, New Jersey Weather

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

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

Sayreville, NJ
Sunday, July 5 at 1:41 AM
76
°
Overcast
Feels like
81°
Humidity
84%
Wind
7 mph
Sunrise
1:33 AM
Sunset
4:30 PM
Sayreville, NJ
Hour by hour · 24h
24-Hour ForecastSayreville, NJ: 24-hour forecast. Temperatures range from 73 to 85 degrees Fahrenheit with a 63% chance of precipitation at 10 PM.
L 73°H 85°
Sayreville, NJ
7-day forecast
  1. Today
    Jul 5
    Heavy Rain
    73%
    0.54″
    85°73°—
  2. Monday
    Jul 6
    Heavy Rain
    94%
    1.4″
    77°70°-8°
  3. Tuesday
    Jul 7
    Drizzle
    86%
    0.02″
    71°65°-6°
  4. Wednesday
    Jul 8
    Overcast
    35%
    —
    77°63°+6°
  5. Thursday
    Jul 9
    Light Drizzle
    14%
    —
    84°66°+7°
  6. Friday
    Jul 10
    Drizzle
    42%
    0.09″
    89°72°+5°
  7. Saturday
    Jul 11
    Overcast
    32%
    —
    85°68°-4°
Sayreville, NJ
Next 24 hours · Mild now
70°79°88°12a6a12p6pnow 76°high 85°low 73°PRECIP %
Sayreville, NJ
Anemometer · 24h winds · from true
NESW
From · True
W
277° · veering 31°
Direction
W
277°
Sustained
7
mph
Gust
19
mph
Peak 24h
24
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 24 @ 1:00a
0102030MPHB1B2B3B4B5B6-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 247SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 31° from the w.
Sayreville, NJ
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1011.8
+0.5 mb in 3h · steady · 29.88 inHg
Now
1011.8
mb
3h
+0.5
mb
12h
+0.6
mb
24h
-0.3
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1009–1014
1000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1013.91008.71012.0
−24h−18h−12h−6hnow
Air sits at the threshold — small shifts decide the day.
Sayreville, NJ
Air quality
52
AQI
Moderate
↓-54 in 6h

AQI 52 (Moderate), driven by PM2.5. AQI down 54 over the last 6 hours — air quality is improving sharply. PM scrubbed by 2 hours of recent rain — PM2.5 down to 9.6 µg/m³, PM10 to 9.7 µg/m³.

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

PM 2.5DRIVERGood
9.6μg/m³
PM 10Good
10μg/m³
NO₂Good
16μg/m³
OzoneModerate
65μg/m³
UV IndexLow
0.0

What's driving it

Ozone × UV × Sky

Ozone at AQI 31. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.

Present
AQI 31
UV peak
3.3 at 1 PM
Sky at peak
overcast
Projected peak
AQI 7

PM × Wind × Precip

PM scrubbed by 2 hours of recent rain — PM2.5 down to 9.6 µg/m³, PM10 to 9.7 µg/m³.

PM2.5/PM10
0.99
Wind
light
Recent rain
2h in last 6h
Pattern
washed out

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
Sayreville, NJ
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
33.6mi
UNLIMITED
140 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
05:41 UTC · Sayreville, 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
05:41 UTC · Sayreville, NJ · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Sayreville, NJ
Satellite · infrared · animated
Sayreville, NJ
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Sayreville, NJ
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:01 AM
Sunrise
1:33 AM
Daylight
14h 57m
Sunset
4:30 PM
Civil dusk
9:04 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Sayreville, NJ
The moon
Waning Gibbous
75% illuminated
Moonrise
11:14 PM
Moonset
11:06 AM
In sign
♓︎ Pisces
Sayreville, NJ
Microseason
Jul 1–5

Cicadas claim the afternoon

fish
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Sayreville at a glance

  • Today vs. normal: 5°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: 08872

15-Day Forecast — Sayreville

  1. Sun85°73°73%
  2. Mon77°70°94%
  3. Tue71°65°86%
  4. Wed77°63°35%
  5. Thu84°66°14%
  6. Fri89°72°42%
  7. Sat85°68°32%
  8. Sun76°65°23%
  9. Mon83°65°14%
  10. Tue89°66°18%
  11. Wed91°69°34%
  12. Thu89°69°34%
  13. Fri82°72°30%
  14. Sat86°69°26%
  15. Sun95°75°36%

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

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 — Sayreville

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

  • TODAYSLGTSlight Risk
  • TOMORROWMRGLMarginal 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 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

The year in Sayreville tops out in July (~77°F) and dips lowest in January (~30°F), with December wettest at 4.2 inches and February driest at 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

Sayreville swings from 30°F in January to 77°F in July (46°F) per NOAA NCEI 1991-2020 normals; precipitation in Sayreville runs about 43.6 inches on roughly 175 measurable days.

No season owns Sayreville's rain: December reaches 4.2 inches across 13.3 days and February keeps 3.0 inches on 12.5, an even spread through Sayreville's year. It is a balanced pattern Sayreville shares with places like Madison Park, NJ, South Amboy, NJ and South River, NJ.

Sayreville reaches its last hard frost near mid-April; that is the cue for peas, lettuce, spinach, and radishes. Tomatoes and peppers do best set out two weeks later in Sayreville, once nights clear the mid-40s°F. By mid-November, frost is back in Sayreville — protect or harvest anything tender. Sayreville's low ground holds frost later into spring than Sayreville's benches, which run 3-5 days ahead.

Similar climates: Madison Park, NJ, South Amboy, NJ, South River, NJ, Keasbey, NJ, Laurence Harbor, NJ.

Frequently asked

When does it freeze in Sayreville?
Frost typically leaves Sayreville by mid-April and returns to Sayreville near mid-November.
What is the rainy season in Sayreville?
Sayreville sees its heaviest rain in December (around 4.2 inches), part of roughly 44 inches a year.
What is the warmest month in Sayreville?
The warmest stretch in Sayreville comes in July, around 77°F on average.
What is the coldest month in Sayreville?
On average January is the chilliest month in Sayreville, about 30°F.
When can I start a vegetable garden in Sayreville?
Sayreville's last frost (mid-April) cues hardy greens; in Sayreville, hold heat-lovers two weeks past.
How many rainy days does Sayreville get?
Sayreville averages about 175 days with measurable rain or snow each year.
What hardiness zone is Sayreville?
Sayreville's hardiness zone tracks its winter low; with January near 30°F, check the USDA ZIP map for the exact zone.
What is the 10-day forecast for Sayreville?
Sayreville'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 Sayreville?
See this week's day-by-day rain chances for Sayreville in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Sayreville?
Current conditions for Sayreville and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Sayreville forecast updated?
The Sayreville forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Sayreville?
Today's sunrise and sunset times for Sayreville 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 Sayreville?
The next few days in Sayreville's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Sayreville's warm-summer humid continental climate in New Jersey pairs 30°F Januarys with 77°F Julys, 47°F apart across the seasons.

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

The 47°F gap between Sayreville's summer and winter, at 40.5°N, shapes Sayreville's frost calendar.

Beaches near Sayreville

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 Sayreville

  • 08872
  • 08879
  • 08859
  • 08871

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.