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Rensselaer, New York Weather

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

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

Rensselaer, NY
Saturday, July 4 at 4:06 PM
87
°
Overcast
Feels like
90°
Humidity
47%
Wind
10 mph
Sunrise
1:22 AM
Sunset
4:35 PM
Rensselaer, NY
Hour by hour · 24h
24-Hour ForecastRensselaer, NY: 24-hour forecast. Temperatures range from 68 to 87 degrees Fahrenheit with a 28% chance of precipitation at 7 PM.
L 68°H 87°
Rensselaer, NY
7-day forecast
  1. Today
    Jul 4
    Light Drizzle
    28%
    —
    87°72°—
  2. Sunday
    Jul 5
    Overcast
    11%
    —
    86°68°-1°
  3. Monday
    Jul 6
    Rain
    62%
    1.6″
    75°63°-11°
  4. Tuesday
    Jul 7
    Showers
    65%
    0.83″
    65°61°-10°
  5. Wednesday
    Jul 8
    Light Drizzle
    20%
    —
    78°61°+13°
  6. Thursday
    Jul 9
    Light Drizzle
    26%
    0.01″
    83°64°+5°
  7. Friday
    Jul 10
    Light Drizzle
    58%
    —
    80°66°-3°
Rensselaer, NY
Next 24 hours · Warm now
HOT 90°62°77°92°12p6p12a6anow 87°high 87°low 68°PRECIP %
Rensselaer, NY
Anemometer · 24h winds · from true
NESW
From · True
WNW
293° · veering 15°
Direction
WNW
293°
Sustained
10
mph
Gust
16
mph
Peak 24h
21
avg 5
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 5 · pk 21 @ 5:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 216SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 15° from the wnw.
Rensselaer, NY
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1010.1
-1.2 mb in 3h · falling · 29.83 inHg
Now
1010.1
mb
3h
-1.2
mb
12h
-0.6
mb
24h
-0.3
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1010–1011
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1011.31009.71010.1
−24h−18h−12h−6hnow
Pressure slipping through the change line — wetter air on the way.
Rensselaer, NY
Air quality
54
AQI
Moderate
↑+9 in 6h

AQI 54 (Moderate), driven by Ozone. AQI up 9 over the last 6 hours (gradual rise). Ozone at AQI 48 — peak already passed at 1 PM under overcast 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
5.8μg/m³
PM 10Good
7μg/m³
NO₂Good
1μg/m³
OzoneDRIVERUnhealthy SG
101μg/m³
UV IndexModerate
2.5

What's driving it

Ozone × UV × Sky

Ozone at AQI 48 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.

Present
AQI 48
UV peak
2.3 at earlier today
Sky at peak
overcast
Projected peak
AQI 48

PM × Wind × Precip

PM2.5 at 5.8 µg/m³, PM10 at 6.6 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/m³300
Rensselaer, NY
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
68.3mi
UNLIMITED
87 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
20:06 UTC · Rensselaer, 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
20:06 UTC · Rensselaer, NY · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Rensselaer, NY
Satellite · infrared · animated
Rensselaer, NY
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Rensselaer, NY
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
4:48 AM
Sunrise
1:22 AM
Daylight
15h 13m
Sunset
4:35 PM
Civil dusk
9:11 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Rensselaer, NY
The moon
Waning Gibbous
79% illuminated
Moonrise
10:52 PM
Moonset
9:55 AM
In sign
♓︎ Pisces
Rensselaer, NY
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Rensselaer at a glance

  • Today vs. normal: 18°F above the seasonal normal for this latitude
  • Last frost: May 2 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 12144

16-Day Forecast — Rensselaer

  1. Sat88°72°28%
  2. Sun86°70°11%
  3. Mon75°63°62%
  4. Tue65°61°65%
  5. Wed78°61°20%
  6. Thu83°64°26%
  7. Fri80°66°58%
  8. Sat75°68°34%
  9. Sun73°61°26%
  10. Mon78°59°28%
  11. Tue77°62°32%
  12. Wed84°57°35%
  13. Thu83°63°69%
  14. Fri93°64°45%
  15. Sat93°67°48%
  16. Sun79°69°47%

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 — Rensselaer

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

  • TODAYSLGTSlight Risk
  • TOMORROWTSTMGeneral Thunderstorms
  • 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——
April——
Maylettuce, peas, spinach, radisheslettuce, peas, radishes
Junelettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
Augusttomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
October—winter squash, tomatoes (last)
November——
December——

A year in weather

In Rensselaer, July runs warmest near 72°F and January coldest around 23°F, while May is the wettest month (4.1 inches) and February the driest (2.8 inches).

MonthMean tempPrecipRainy days
January23°3.2″17
February25°2.8″16
March34°3.5″19
April47°4.0″19
May57°4.1″19
June66°4.1″18
July72°3.7″18
August71°3.9″18
September64°3.5″16
October53°3.7″16
November38°4.1″17
December28°3.8″18

Regional context

In Rensselaer, NOAA NCEI 1991-2020 normals put January near 23°F and July near 72°F — a 49°F seasonal arc — with about 44.3 inches of precipitation over 210 rainy or snowy days.

Rainfall in Rensselaer stays even across the calendar: May tops out at 4.1 inches over 18.5 rainy days, and February still logs 2.8 inches across 16.5 — a narrow range for Rensselaer. That even rhythm groups Rensselaer with places like Hampton Manor, NY, Menands, NY and Albany, NY.

Around late-May, Rensselaer sheds its freezing nights — kale, peas, spinach, and parsnips go into Rensselaer's beds. Rensselaer's heat-lovers — tomatoes, peppers, squash — hold off until Rensselaer's frost risk clears, 10-14 days on. Frost returns to Rensselaer near early-October, ending the tender-crop season. A creek-bottom lot in Rensselaer can lag Rensselaer's last frost 7-10 days behind a south slope.

Similar climates: Hampton Manor, NY, Menands, NY, Albany, NY, Loudonville, NY, Roessleville, NY.

Frequently asked

When does it freeze in Rensselaer?
In Rensselaer, expect the last spring frost near mid-May; Rensselaer's first autumn frost comes around mid-October.
What is the rainy season in Rensselaer?
Rensselaer sees its heaviest rain in May (around 4.1 inches), part of roughly 44 inches a year.
What is the warmest month in Rensselaer?
On average July tops the year in Rensselaer at about 72°F.
What is the coldest month in Rensselaer?
The coldest stretch in Rensselaer falls in January, around 23°F on average.
When can I start a vegetable garden in Rensselaer?
Around mid-May, start frost-hardy crops in Rensselaer; tomatoes and basil belong a fortnight later.
How many rainy days does Rensselaer get?
Rensselaer averages about 210 days with measurable rain or snow each year.
What hardiness zone is Rensselaer?
Since January in Rensselaer averages 23°F, Rensselaer's USDA zone follows that floor — confirm it by ZIP.
What is the 10-day forecast for Rensselaer?
Rensselaer'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 Rensselaer?
See this week's day-by-day rain chances for Rensselaer in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Rensselaer?
Current conditions for Rensselaer and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Rensselaer forecast updated?
The Rensselaer forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Rensselaer?
Today's sunrise and sunset times for Rensselaer 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 Rensselaer?
The next few days in Rensselaer'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 Rensselaer, New York carries typical Januarys near 23°F and Julys around 72°F — 49°F of seasonal travel.

Rensselaer sees close to 44 inches of precipitation annually, falling across some 210 wet days.

From 42.6°N, Rensselaer sees a 49°F seasonal swing that governs Rensselaer's planting and frost windows.

All cities in New York →

Albany, NY weather →

ZIP codes in Rensselaer

  • 12144

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.