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

Union, New Jersey Weather

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

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

Union, NJ
Sunday, July 5 at 1:18 AM
74
°
Light Drizzle
Feels like
79°
Humidity
82%
Wind
5 mph
Sunrise
1:31 AM
Sunset
4:31 PM
Union, NJ
Hour by hour · 24h
24-Hour ForecastUnion, NJ: 24-hour forecast. Temperatures range from 72 to 86 degrees Fahrenheit with a 64% chance of precipitation at 12 AM.
L 72°H 86°
Union, NJ
7-day forecast
  1. Today
    Jul 5
    Drizzle
    59%
    0.07″
    86°73°—
  2. Monday
    Jul 6
    Heavy Rain
    94%
    1.2″
    73°67°-13°
  3. Tuesday
    Jul 7
    Drizzle
    82%
    0.03″
    69°63°-4°
  4. Wednesday
    Jul 8
    Overcast
    30%
    —
    81°63°+12°
  5. Thursday
    Jul 9
    Light Drizzle
    18%
    —
    87°65°+6°
  6. Friday
    Jul 10
    Light Drizzle
    44%
    —
    91°71°+4°
  7. Saturday
    Jul 11
    Overcast
    31%
    —
    88°67°-3°
Union, NJ
Next 24 hours · Mild now
HOT 90°68°79°90°12a6a12p6pnow 74°high 86°low 72°PRECIP %
Union, NJ
Anemometer · 24h winds · from true
NESW
From · True
SW
221° · backing 21°
Direction
SW
221°
Sustained
5
mph
Gust
17
mph
Peak 24h
29
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 29 @ 10:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 203SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 21° from the sw.
Union, NJ
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1010.1
+2.5 mb in 3h · rising rapidly · 29.83 inHg
Now
1010.1
mb
3h
+2.5
mb
12h
+2.6
mb
24h
+1.6
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1005–1010
1000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR-21h-18h-15h-12h-9h-6h-3h-24hNOW1010.31005.21010.3
−24h−18h−12h−6hnow
Pressure climbing through the change line — drier air pushing in.
Union, NJ
Air quality
45
AQI
Good
↓-52 in 6h

AQI 45 (Good), driven by PM2.5. AQI down 52 over the last 6 hours — air quality is improving sharply. PM scrubbed by 2 hours of recent rain — PM2.5 down to 6.0 µg/m³, PM10 to 6.2 µg/m³.

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

PM 2.5DRIVERGood
6.0μg/m³
PM 10Good
6μg/m³
NO₂Good
10μg/m³
OzoneModerate
70μg/m³
UV IndexLow
0.0

What's driving it

Ozone × UV × Sky

Ozone at AQI 33. Overcast through the UV peak window (cloud cover ~80%) — afternoon ozone should stay flat.

Present
AQI 33
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 6.0 µg/m³, PM10 to 6.2 µg/m³.

PM2.5/PM10
0.97
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/m³640
Union, NJ
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
35.9mi
UNLIMITED
120 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
05:18 UTC · Union, 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
05:18 UTC · Union, NJ · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Union, NJ
Satellite · infrared · animated
Union, NJ
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Union, NJ
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
4:59 AM
Sunrise
1:31 AM
Daylight
15h 00m
Sunset
4:31 PM
Civil dusk
9:05 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Union, NJ
The moon
Waning Gibbous
76% illuminated
Moonrise
11:14 PM
Moonset
11:06 AM
In sign
♓︎ Pisces
Union, NJ
Microseason
Jul 1–5

Cicadas claim the afternoon

fish
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Union at a glance

  • Today vs. normal: 3°F above the seasonal normal for this latitude
  • Last frost: April 20 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 07083

15-Day Forecast — Union

  1. Sun86°73°59%
  2. Mon73°67°94%
  3. Tue69°63°82%
  4. Wed81°63°30%
  5. Thu87°65°18%
  6. Fri91°71°44%
  7. Sat88°67°31%
  8. Sun81°64°21%
  9. Mon86°64°16%
  10. Tue90°66°19%
  11. Wed89°69°34%
  12. Thu90°70°34%
  13. Fri84°70°30%
  14. Sat87°69°26%
  15. Sun95°76°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 — Union

SPC has placed Union 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 Union tops out in July (~75°F) and dips lowest in January (~29°F), with December wettest at 4.3 inches and February driest at 3.0 inches.

MonthMean tempPrecipRainy days
January29°3.6″13
February31°3.0″13
March39°3.8″16
April51°4.1″17
May59°3.9″18
June69°3.9″17
July75°3.8″17
August74°4.2″17
September67°3.7″14
October57°3.3″12
November43°3.9″13
December34°4.3″13

Regional context

By the nearest station's NOAA NCEI 1991-2020 normals, Union sees 29°F Januarys and 75°F Julys, a 46°F range, plus around 45.4 inches of precipitation across 180 days.

Union's precipitation spreads evenly: December peaks at 4.3 inches on 13.2 wet days, while February holds 3.0 inches over 12.9 — no month dominates Union's rain calendar. That lines Union up with places like Connecticut Farms, NJ, Vauxhall, NJ and Kenilworth, NJ, fed by overlapping storm tracks.

Union's growing window opens around mid-April, once Union's overnight lows stop freezing — sow kale, peas, spinach, and parsnips. Warm-soil crops in Union wait about two weeks past Union's last frost, once the soil warms. Union's window closes around mid-November as overnight lows return below freezing. In Union, low spots run 4-7°F colder than nearby slopes, nudging Union's frost dates a week.

Similar climates: Connecticut Farms, NJ, Vauxhall, NJ, Kenilworth, NJ, Roselle Park, NJ, Kean University, NJ.

Frequently asked

When does it freeze in Union?
In Union, expect the last spring frost near mid-April; Union's first autumn frost comes around mid-November.
What is the rainy season in Union?
Rainfall in Union peaks in December near 4.3 inches, out of about 45 inches annually.
What is the warmest month in Union?
Union peaks in July, when the mean runs near 75°F.
What is the coldest month in Union?
January is Union's coldest month, averaging about 29°F.
When can I start a vegetable garden in Union?
Around mid-April, start frost-hardy crops in Union; tomatoes and basil belong a fortnight later.
How many rainy days does Union get?
Union records around 180 days of measurable precipitation annually.
What hardiness zone is Union?
Because Union bottoms near 29°F in January, that winter low sets Union's USDA zone — verify by ZIP.
What is the 10-day forecast for Union?
Union'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 Union?
See this week's day-by-day rain chances for Union in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Union?
Current conditions for Union and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Union forecast updated?
The Union forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Union?
Today's sunrise and sunset times for Union 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 Union?
The next few days in Union'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 Union, New Jersey carries typical Januarys near 29°F and Julys around 75°F — 46°F of seasonal travel.

Across the year, Union collects about 45 inches of precipitation over roughly 180 days with measurable rain or snow.

Union sits at 40.7°N; that 46°F seasonal swing frames planting windows and frost dates across Union.

Beaches near Union

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 →

Elizabeth, NJ weather →

ZIP codes in Union

  • 07083

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.