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

Hartsdale, New York Weather

Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →

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

Hartsdale, NY
Saturday, July 4 at 4:08 PM
95
°
Clear
Feels like
97°
Humidity
35%
Wind
10 mph
Sunrise
1:28 AM
Sunset
4:30 PM
Hartsdale, NY
Hour by hour · 24h
24-Hour ForecastHartsdale, NY: 24-hour forecast. Temperatures range from 74 to 96 degrees Fahrenheit with a 48% chance of precipitation at 9 PM.
L 74°H 96°
Hartsdale, NY
7-day forecast
  1. Today
    Jul 4
    Overcast
    48%
    —
    96°75°—
  2. Sunday
    Jul 5
    Heavy Rain
    57%
    1.4″
    88°71°-8°
  3. Monday
    Jul 6
    Rain
    88%
    0.19″
    71°68°-17°
  4. Tuesday
    Jul 7
    Heavy Drizzle
    80%
    0.06″
    68°61°-3°
  5. Wednesday
    Jul 8
    Overcast
    23%
    —
    81°60°+13°
  6. Thursday
    Jul 9
    Overcast
    15%
    —
    91°70°+10°
  7. Friday
    Jul 10
    Light Drizzle
    55%
    —
    87°70°-4°
Hartsdale, NY
Next 24 hours · Hot now
HOT 90°70°85°100°12p6p12a6anow 95°high 96°low 74°PRECIP %
Hartsdale, NY
Anemometer · 24h winds · from true
NESW
From · True
WNW
284° · veering 18°
Direction
WNW
284°
Sustained
10
mph
Gust
18
mph
Peak 24h
22
avg 8
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 8 · pk 22 @ 9:00p
0102030MPHB1B2B3B4B5B6B7-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 308SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 18° from the wnw.
Hartsdale, NY
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1002.1
-0.4 mb in 3h · steady · 29.59 inHg
Now
1002.1
mb
3h
-0.4
mb
12h
-0.4
mb
24h
+0.1
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1002–1004
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1003.51001.61002.1
−24h−18h−12h−6hnow
Damp, unsettled regime — wet weather lingers nearby.
Hartsdale, NY
Air quality
66
AQI
Moderate
↑+27 in 6h▲Peak ~75 @ 10 PM

AQI 66 (Moderate), driven by Ozone. AQI up 27 in the last 6 hours — air quality is degrading. Ozone at AQI 71 — peak already passed at 1 PM under clear skies. Levels should ease through evening.

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
6.8μg/m³
PM 10Good
8μg/m³
NO₂Good
1μg/m³
OzoneDRIVERUnhealthy SG
120μg/m³
UV IndexModerate
3.8

What's driving it

Ozone × UV × Sky

Ozone at AQI 71 — peak already passed at 1 PM under clear skies. Levels should ease through evening.

Present
AQI 71
UV peak
3.4 at earlier today
Sky at peak
clear
Projected peak
AQI 71

PM × Wind × Precip

PM2.5 at 6.8 µg/m³, PM10 at 7.7 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 TREND50100SATSUNMONTUEWEDTHUFRISAT7-DAY PM2.5 TREND · μg/m³510
Hartsdale, NY
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
100.5mi
UNLIMITED
113 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
20:08 UTC · Hartsdale, NY · 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
20:08 UTC · Hartsdale, NY · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Hartsdale, NY
Satellite · infrared · animated
Hartsdale, NY
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Hartsdale, NY
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
4:56 AM
Sunrise
1:28 AM
Daylight
15h 02m
Sunset
4:30 PM
Civil dusk
9:05 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Hartsdale, NY
The moon
Waning Gibbous
79% illuminated
Moonrise
10:50 PM
Moonset
9:57 AM
In sign
♓︎ Pisces
Hartsdale, NY
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Hartsdale at a glance

  • Today vs. normal: 24°F above the seasonal normal for this latitude
  • Last frost: April 22 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 10530

16-Day Forecast — Hartsdale

  1. Sat97°75°48%
  2. Sun88°71°57%
  3. Mon71°68°88%
  4. Tue68°61°80%
  5. Wed81°60°23%
  6. Thu91°70°15%
  7. Fri87°70°55%
  8. Sat86°74°38%
  9. Sun84°68°26%
  10. Mon76°65°23%
  11. Tue84°67°24%
  12. Wed88°64°28%
  13. Thu89°69°41%
  14. Fri94°71°45%
  15. Sat92°73°34%
  16. Sun92°75°39%

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

Right now in the garden

Peak growing season

As of July 4, 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 — Hartsdale

SPC has placed Hartsdale 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 185 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

July is Hartsdale's warmest stretch (~76°F) and January its coldest (~29°F); precipitation crests in December at 4.2 inches and ebbs in February to 2.9 inches.

MonthMean tempPrecipRainy days
January29°3.5″14
February31°2.9″13
March39°3.6″16
April51°4.0″17
May60°3.9″18
June69°3.8″17
July76°3.6″17
August75°3.9″17
September68°3.4″13
October57°3.3″12
November44°3.9″13
December34°4.2″13

Regional context

Per NOAA NCEI 1991-2020 normals, Hartsdale runs from a 29°F January mean to 76°F in July, a 46°F seasonal spread, with near 43.9 inches of precipitation across about 180 wet days.

Hartsdale's precipitation spreads evenly: December peaks at 4.2 inches on 13.2 wet days, while February holds 2.9 inches over 13.1 — no month dominates Hartsdale's rain calendar. It is a balanced pattern Hartsdale shares with places like Greenville, NY, Ardsley, NY and Scarsdale, NY.

Once Hartsdale passes mid-April, overnight freezes fade and kale, peas, spinach, and parsnips can be sown. Tomatoes and peppers do best set out two weeks later in Hartsdale, once nights clear the mid-40s°F. By mid-November, frost is back in Hartsdale — protect or harvest anything tender. Hartsdale's low ground holds frost later into spring than Hartsdale's benches, which run 3-5 days ahead.

Similar climates: Greenville, NY, Ardsley, NY, Scarsdale, NY, White Plains, NY, Elmsford, NY.

Frequently asked

When does it freeze in Hartsdale?
Frost typically leaves Hartsdale by mid-April and returns to Hartsdale near mid-November.
What is the rainy season in Hartsdale?
December is the wettest month in Hartsdale, about 4.2 inches on average; the year totals roughly 44 inches.
What is the warmest month in Hartsdale?
Hartsdale peaks in July, when the mean runs near 76°F.
What is the coldest month in Hartsdale?
January is Hartsdale's coldest month, averaging about 29°F.
When can I start a vegetable garden in Hartsdale?
In Hartsdale, sow peas and hardy greens around mid-April; Hartsdale's tomatoes and peppers wait two weeks more.
How many rainy days does Hartsdale get?
Expect roughly 180 wet days a year in Hartsdale.
What hardiness zone is Hartsdale?
Since January in Hartsdale averages 29°F, Hartsdale's USDA zone follows that floor — confirm it by ZIP.
What is the 10-day forecast for Hartsdale?
Hartsdale'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 Hartsdale?
See this week's day-by-day rain chances for Hartsdale in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Hartsdale?
Current conditions for Hartsdale and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Hartsdale forecast updated?
The Hartsdale forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Hartsdale?
Today's sunrise and sunset times for Hartsdale 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 Hartsdale?
The next few days in Hartsdale'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, Hartsdale, New York swings from 29°F in the heart of winter to 76°F at midsummer — a 47°F arc.

Rain and snow bring Hartsdale roughly 44 inches a year across approximately 180 measurable-precipitation days.

Hartsdale's 47°F range, set by its 41.0°N position, drives frost timing and what thrives in Hartsdale.

Beaches near Hartsdale

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 York →

White Plains, NY weather →

ZIP codes in Hartsdale

  • 10583
  • 10530

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.