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Hamilton Square, New Jersey Weather

Solstice approaches — longest light. Day 88 of spring. Read this microseason across nine climate regions →

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

Hamilton Square, NJ
Monday, June 15 at 12:08 PM
72
°
Clear
Feels like
72°
Humidity
48%
Wind
11 mph
Sunrise
1:28 AM
Sunset
4:29 PM
Hamilton Square, NJ
Hour by hour · 24h
24-Hour ForecastHamilton Square, NJ: 24-hour forecast. Temperatures range from 56 to 76 degrees Fahrenheit.
L 56°H 76°
Hamilton Square, NJ
7-day forecast
  1. Today
    Jun 15
    Heavy Rain
    96%
    1.0″
    76°63°—
  2. Tuesday
    Jun 16
    Overcast
    —
    —
    78°56°+2°
  3. Wednesday
    Jun 17
    Light Drizzle
    33%
    0.02″
    84°59°+6°
  4. Thursday
    Jun 18
    Light Drizzle
    45%
    —
    92°66°+8°
  5. Friday
    Jun 19
    Drizzle
    30%
    0.04″
    84°67°-8°
  6. Saturday
    Jun 20
    Mostly Clear
    —
    —
    79°59°-5°
  7. Sunday
    Jun 21
    Overcast
    —
    —
    81°58°+2°
Hamilton Square, NJ
Next 24 hours · Mild now
50°65°80°12p6p12a6anow 72°high 76°low 56°
Hamilton Square, NJ
Anemometer · 24h winds · from true
NESW
From · True
NW
310° · veering 103°
Direction
NW
310°
Sustained
11
mph
Gust
16
mph
Peak 24h
35
avg 12
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 12 · pk 35 @ 11:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 184SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 103° from the nw.
Hamilton Square, NJ
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1002.2
-0.1 mb in 3h · steady · 29.59 inHg
Now
1002.2
mb
3h
-0.1
mb
12h
+1.5
mb
24h
-3.7
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 998–1006
9909951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1005.9997.91002.2
−24h−18h−12h−6hnow
Damp, unsettled regime — wet weather lingers nearby.
Hamilton Square, NJ
Air quality
31
AQI
Good
↓-10 in 6h▲Peak ~37 @ 10 PM

AQI 31 (Good), driven by Ozone. AQI down 10 over the last 6 hours (gradual decline). Ozone at AQI 37 now. With UV 8.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 42 around 1 PM.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.

PM 2.5Good
3.3μg/m³
PM 10Good
3μg/m³
NO₂Good
1μg/m³
OzoneDRIVERModerate
78μg/m³
UV IndexVery high
8.3

What's driving it

Ozone × UV × Sky

Ozone at AQI 37 now. With UV 8.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 42 around 1 PM.

Present
AQI 37
UV peak
8.6 at 1 PM
Sky at peak
clear
Projected peak
AQI 42

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 TREND50100MONTUEWEDTHUFRISATSUNMON7-DAY PM2.5 TREND · μg/m³300
Hamilton Square, NJ
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
85.6mi
UNLIMITED
101 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
16:08 UTC · Hamilton Square, 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
16:08 UTC · Hamilton Square, NJ · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Hamilton Square, NJ
Satellite · infrared · animated
Hamilton Square, NJ
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Hamilton Square, NJ
Almanac · Monday, June 15
A summer fog for fair, a winter fog for rain.
Civil dawn
4:56 AM
Sunrise
1:28 AM
Daylight
15h 01m
Sunset
4:29 PM
Civil dusk
9:04 PM
Planting note
Stake and prune tomato suckers. Watch for squash vine borers.
Hamilton Square, NJ
The moon
New Moon
1% illuminated
Moonrise
5:28 AM
Moonset
8:43 PM
In sign
♋︎ Cancer
Hamilton Square, NJ
Microseason
Jun 11–15

Solstice approaches — longest light

cultural
Jan 145% of the yearDec 31

Read this microseason across nine climate regions →

Hamilton Square at a glance

  • Today vs. normal: 3°F below the seasonal normal for this latitude
  • Last frost: April 17 (climatological average for this latitude)
  • Microseason: Jun 11–15
  • Planting window: Stake and prune tomato suckers. Watch for squash vine borers.

16-Day Forecast — Hamilton Square

  1. Mon76°63°96%
  2. Tue78°56°0%
  3. Wed84°59°33%
  4. Thu92°66°45%
  5. Fri84°67°30%
  6. Sat79°59°9%
  7. Sun81°58°4%
  8. Mon65°59°31%
  9. Tue80°54°31%
  10. Wed81°54°17%
  11. Thu82°56°12%
  12. Fri83°55°19%
  13. Sat90°59°17%
  14. Sun92°67°18%
  15. Mon101°70°26%
  16. Tue93°72°30%

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

Right now in the garden

Peak growing season

As of June 15, 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.

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 11–15

Solstice approaches — longest light

Sunrise before 5:30 AM; sunset nearly 8:30 PM.

Day 166 of 365 · Wedge 33 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 Hamilton Square tops out in July (~77°F) and dips lowest in January (~31°F), with August wettest at 4.2 inches and October driest at 3.0 inches.

MonthMean tempPrecipRainy days
January31°3.5″13
February33°3.1″12
March42°3.8″15
April53°4.0″16
May61°3.7″17
June71°3.8″17
July77°3.8″16
August76°4.2″17
September69°3.7″13
October58°3.0″11
November45°3.7″12
December36°4.2″13

Regional context

Hamilton Square's climate, from NOAA NCEI 1991-2020 station normals, pairs 31°F Januarys with 77°F Julys — a 46°F swing. About 44.4 inches of precipitation falls over roughly 173 days a year.

No season owns Hamilton Square's rain: August reaches 4.2 inches across 17.2 days and October keeps 3.0 inches on 10.6, an even spread through Hamilton Square's year. That even rhythm groups Hamilton Square with places like Mercerville, NJ, Yardville, NJ and White Horse, NJ.

The cool-season window in Hamilton Square starts at mid-April, when nights stop freezing — think peas, lettuce, spinach, and radishes. Warm-soil crops in Hamilton Square wait about two weeks past Hamilton Square's last frost, once the soil warms. It shuts near mid-November, when freezes return to Hamilton Square and tender plants need cover. In Hamilton Square, low spots run 4-7°F colder than nearby slopes, nudging Hamilton Square's frost dates a week.

Similar climates: Mercerville, NJ, Yardville, NJ, White Horse, NJ, Groveville, NJ, Windsor, NJ.

Frequently asked

When does it freeze in Hamilton Square?
Frost typically leaves Hamilton Square by mid-April and returns to Hamilton Square near mid-November.
What is the rainy season in Hamilton Square?
August is the wettest month in Hamilton Square, about 4.2 inches on average; the year totals roughly 44 inches.
What is the warmest month in Hamilton Square?
Hamilton Square peaks in July, when the mean runs near 77°F.
What is the coldest month in Hamilton Square?
January is Hamilton Square's coldest month, averaging about 31°F.
When can I start a vegetable garden in Hamilton Square?
Around mid-April, start frost-hardy crops in Hamilton Square; tomatoes and basil belong a fortnight later.
How many rainy days does Hamilton Square get?
Hamilton Square records around 173 days of measurable precipitation annually.
What hardiness zone is Hamilton Square?
Since January in Hamilton Square averages 31°F, Hamilton Square's USDA zone follows that floor — confirm it by ZIP.
What is the 10-day forecast for Hamilton Square?
Hamilton Square'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 Hamilton Square?
See this week's day-by-day rain chances for Hamilton Square in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Hamilton Square?
Current conditions for Hamilton Square and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Hamilton Square forecast updated?
The Hamilton Square forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Hamilton Square?
Day length in Hamilton Square peaks around the June solstice — earliest sunrise and latest sunset — and is shortest near the December solstice.
How accurate is the weather forecast for Hamilton Square?
The next few days in Hamilton Square's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Set in a warm-summer humid continental zone, Hamilton Square, New Jersey swings from 31°F in the heart of winter to 77°F at midsummer — a 46°F arc.

Hamilton Square sees close to 44 inches of precipitation annually, falling across some 173 wet days.

Hamilton Square's 46°F range, set by its 40.2°N position, drives frost timing and what thrives in Hamilton Square.

All cities in New Jersey →

Trenton, NJ weather →

ZIP codes in Hamilton Square

  • 08690
  • 08691

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.