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New Windsor, Maryland Weather

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

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

New Windsor, MD
Saturday, July 4 at 5:55 PM
99
°
Clear
Feels like
101°
Humidity
31%
Wind
5 mph
Sunrise
1:46 AM
Sunset
4:39 PM
New Windsor, MD
Hour by hour · 24h
24-Hour ForecastNew Windsor, MD: 24-hour forecast. Temperatures range from 76 to 99 degrees Fahrenheit with a 26% chance of precipitation at 1 AM.
L 76°H 99°
New Windsor, MD
7-day forecast
  1. Today
    Jul 4
    Overcast
    25%
    —
    99°79°—
  2. Sunday
    Jul 5
    Overcast
    45%
    —
    95°76°-4°
  3. Monday
    Jul 6
    Thunderstorm
    84%
    0.18″
    80°70°-15°
  4. Tuesday
    Jul 7
    Thunderstorm
    82%
    1.7″
    83°70°+3°
  5. Wednesday
    Jul 8
    Light Drizzle
    33%
    0.05″
    76°67°-7°
  6. Thursday
    Jul 9
    Overcast
    11%
    —
    88°66°+12°
  7. Friday
    Jul 10
    Light Drizzle
    43%
    —
    86°69°-2°
New Windsor, MD
Next 24 hours · Hot now
HOT 90°70°88°105°6p12a6a12pnow 99°high 99°low 76°PRECIP %
New Windsor, MD
Anemometer · 24h winds · from true
NESW
From · True
SSW
197° · backing 23°
Direction
SSW
197°
Sustained
5
mph
Gust
13
mph
Peak 24h
26
avg 6
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 6 · pk 26 @ 8:00p
010203040MPHB1B2B3B4B5B6B7B8-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 408SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 23° from the ssw.
New Windsor, MD
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
994.4
-1.9 mb in 3h · falling · 29.36 inHg
Now
994.4
mb
3h
-1.9
mb
12h
-1.7
mb
24h
-2.1
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 994–998
9909951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW998.4995.1995.1
−24h−18h−12h−6hnow
Deep low still deepening — rough seas, strong wind, persistent rain.
New Windsor, MD
Air quality
86
AQI
Moderate
↑+35 in 6h

AQI 86 (Moderate), driven by Ozone. AQI up 35 in the last 6 hours — air quality is degrading. Ozone at AQI 80 — 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.

PM 2.5Good
7.6μg/m³
PM 10Good
9μg/m³
NO₂Good
1μg/m³
OzoneDRIVERUnhealthy SG
125μg/m³
UV IndexLow
2.0

What's driving it

Ozone × UV × Sky

Ozone at AQI 80 — peak already passed at 1 PM under clear skies. Levels should ease through evening.

Present
AQI 80
UV peak
1.7 at earlier today
Sky at peak
clear
Projected peak
AQI 80

PM × Wind × Precip

PM2.5 at 7.6 µg/m³ (AQI 42) with a 0.89 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.89
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 TREND50100SATSUNMONTUEWEDTHUFRISAT7-DAY PM2.5 TREND · μg/m³300
New Windsor, MD
Sky cover · visibility · 24h
Cloud cover
1%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
114.8mi
UNLIMITED
119 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
21:55 UTC · New Windsor, MD · 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
21:55 UTC · New Windsor, MD · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
New Windsor, MD
Satellite · infrared · animated
New Windsor, MD
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
New Windsor, MD
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:15 AM
Sunrise
1:46 AM
Daylight
14h 53m
Sunset
4:39 PM
Civil dusk
9:12 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
New Windsor, MD
The moon
Waning Gibbous
78% illuminated
Moonrise
11:01 PM
Moonset
10:12 AM
In sign
♓︎ Pisces
New Windsor, MD
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

New Windsor at a glance

  • Today vs. normal: 27°F above the seasonal normal for this latitude
  • Last frost: April 13 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 21776

16-Day Forecast — New Windsor

  1. Sat99°79°25%
  2. Sun95°76°45%
  3. Mon80°70°84%
  4. Tue83°70°82%
  5. Wed76°67°33%
  6. Thu88°66°11%
  7. Fri86°69°43%
  8. Sat87°68°31%
  9. Sun78°64°27%
  10. Mon81°64°17%
  11. Tue85°62°16%
  12. Wed86°62°35%
  13. Thu90°68°46%
  14. Fri88°70°46%
  15. Sat91°69°40%
  16. Sun86°70°52%

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 — New Windsor

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

  • TODAYSLGTSlight Risk
  • TOMORROWSLGTSlight 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

New Windsor's warmest month is July (~75°F mean) and its coldest is January (~31°F). Rainfall peaks in September (5.2 inches) and bottoms out in February (2.5 inches).

MonthMean tempPrecipRainy days
January31°3.5″7
February33°2.5″6
March41°4.2″8
April52°3.9″7
May61°4.3″9
June70°4.3″7
July75°4.3″7
August73°3.5″6
September66°5.2″7
October55°3.8″6
November44°3.4″6
December36°3.8″7

Regional context

New Windsor swings from 31°F in January to 75°F in July (44°F) per NOAA NCEI 1991-2020 normals; precipitation in New Windsor runs about 46.6 inches on roughly 85 measurable days.

No season owns New Windsor's rain: September reaches 5.2 inches across 6.8 days and February keeps 2.5 inches on 6.2, an even spread through New Windsor's year. That lines New Windsor up with places like Union Bridge, MD, Westminster, MD and Taneytown, MD, fed by overlapping storm tracks.

Around mid-April, New Windsor sheds its freezing nights — peas, lettuce, spinach, and radishes go into New Windsor's beds. Tomatoes and peppers do best set out two weeks later in New Windsor, once nights clear the mid-40s°F. The season ends by mid-November in New Windsor, once hard frosts set back in. New Windsor's low ground holds frost later into spring than New Windsor's benches, which run 3-5 days ahead.

Similar climates: Union Bridge, MD, Westminster, MD, Taneytown, MD, Libertytown, MD, Woodsboro, MD.

Frequently asked

When does it freeze in New Windsor?
Frost typically leaves New Windsor by mid-April and returns to New Windsor near mid-November.
What is the rainy season in New Windsor?
New Windsor sees its heaviest rain in September (around 5.2 inches), part of roughly 47 inches a year.
What is the warmest month in New Windsor?
On average July tops the year in New Windsor at about 75°F.
What is the coldest month in New Windsor?
The coldest stretch in New Windsor falls in January, around 31°F on average.
When can I start a vegetable garden in New Windsor?
Hardy spring crops go in near mid-April in New Windsor; tender peppers and squash wait 10–14 days.
How many rainy days does New Windsor get?
New Windsor averages about 85 days with measurable rain or snow each year.
What hardiness zone is New Windsor?
With January around 31°F, New Windsor's zone reflects that minimum — the USDA ZIP map confirms New Windsor's band.
What is the 10-day forecast for New Windsor?
New Windsor'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 New Windsor?
See this week's day-by-day rain chances for New Windsor in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in New Windsor?
Current conditions for New Windsor and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the New Windsor forecast updated?
The New Windsor forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in New Windsor?
Today's sunrise and sunset times for New Windsor 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 New Windsor?
The next few days in New Windsor'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 New Windsor, Maryland carries typical Januarys near 31°F and Julys around 75°F — 44°F of seasonal travel.

Yearly precipitation in New Windsor totals around 47 inches, spread over about 85 days of rain or snow.

From 39.5°N, New Windsor sees a 44°F seasonal swing that governs New Windsor's planting and frost windows.

All cities in Maryland →

Frederick, MD weather →

ZIP codes in New Windsor

  • 21776

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.