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

Waterbury, Connecticut Weather

Night falls a minute earlier. Day 43 of summer. Read this microseason across nine climate regions →

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

Waterbury, CT
Sunday, August 2 at 11:00 AM
79
°
Overcast
Feels like
83°
Humidity
78%
Wind
11 mph
Sunrise
1:48 AM
Sunset
4:08 PM
Waterbury, CT
Hour by hour · 24h
24-Hour ForecastWaterbury, CT: 24-hour forecast. Temperatures range from 74 to 82 degrees Fahrenheit with a 51% chance of precipitation at 8 AM.
L 74°H 82°
Waterbury, CT
7-day forecast
  1. Today
    Aug 2
    Overcast
    19%
    —
    82°72°—
  2. Monday
    Aug 3
    Heavy Showers
    51%
    3.6″
    81°71°-1°
  3. Tuesday
    Aug 4
    Overcast
    11%
    —
    85°62°+4°
  4. Wednesday
    Aug 5
    Showers
    21%
    0.63″
    76°63°-9°
  5. Thursday
    Aug 6
    Light Rain
    51%
    0.05″
    86°71°+10°
  6. Friday
    Aug 7
    Light Showers
    53%
    0.20″
    94°71°+8°
  7. Saturday
    Aug 8
    Light Drizzle
    49%
    —
    91°70°-3°
Waterbury, CT
Next 24 hours · Mild now
72°78°84°12p6p12a6anow 79°high 82°low 74°PRECIP %
Waterbury, CT
Anemometer · 24h winds · from true
NESW
From · True
S
180° · backing 28°
Direction
S
180°
Sustained
11
mph
Gust
17
mph
Peak 24h
24
avg 7 mph
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 7 mph · pk 24 mph @ 12:00a
0102030MPHB1B2B3B4B5B6B7-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 317SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 28° from the s.
Waterbury, CT
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1003.4
+0.2 mb in 3h · steady · 29.63 inHg
Now
1003.4
mb
3h
+0.2
mb
12h
+1.1
mb
24h
+0.9
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1002–1003
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1003.41001.71003.4
Damp, unsettled regime — wet weather lingers nearby.
Waterbury, CT
Air quality
53
AQI
Moderate
↓-6 in 6h

AQI 53 (Moderate), driven by PM2.5. AQI down 6 over the last 6 hours (gradual decline). PM2.5 at 10.7 µg/m³, PM10 at 13.6 µg/m³ — typical background levels with no transport signature.

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

PM 2.5DRIVERGood
10.7μg/m³
PM 10Good
14μg/m³
NO₂Good
3μg/m³
OzoneModerate
98μg/m³
UV IndexModerate
4.5

What's driving it

Ozone × UV × Sky

Ozone at AQI 46. Overcast through the UV peak window (cloud cover ~85%) — afternoon ozone should stay flat.

Present
AQI 46
UV peak
5.2 at 1 PM
Sky at peak
overcast
Projected peak
AQI 16

PM × Wind × Precip

PM2.5 at 10.7 µg/m³, PM10 at 13.6 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.79
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 TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³360
Waterbury, CT
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
41.0mi
UNLIMITED
94 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
15:00 UTC · Waterbury, CT · 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
15:00 UTC · Waterbury, CT · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Waterbury, CT
Satellite · infrared · animated
Waterbury, CT
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Waterbury, CT
Almanac · Sunday, August 2
Red sky at night, sailor's delight.
Civil dawn
5:17 AM
Sunrise
1:48 AM
Daylight
14h 20m
Sunset
4:08 PM
Civil dusk
8:41 PM
Planting note
Sow fall peas. Start kale and collard seedlings for fall.
Waterbury, CT
The moon
Waning Gibbous
84% illuminated
Moonrise
9:35 PM
Moonset
9:55 AM
In sign
♓︎ Pisces
Waterbury, CT
Microseason
Aug 1–5

Night falls a minute earlier

celestial
Jan 159% of the yearDec 31

Read this microseason across nine climate regions →

Waterbury at a glance

  • Today vs. normal: 18°F above the seasonal normal for this latitude
  • Last frost: April 25 (climatological average for this latitude)
  • Microseason: Aug 1–5
  • Planting window: Sow fall peas. Start kale and collard seedlings for fall.

ZIP codes: 06702, 06704, 06705, 06706, 06708, 06710

16-Day Forecast — Waterbury

  1. Sun82°72°19%
  2. Mon81°71°51%
  3. Tue85°62°11%
  4. Wed76°63°21%
  5. Thu86°71°51%
  6. Fri94°71°53%
  7. Sat91°70°49%
  8. Sun92°71°32%
  9. Mon95°69°31%
  10. Tue81°64°13%
  11. Wed79°57°14%
  12. Thu71°63°41%
  13. Fri85°69°41%
  14. Sat76°67°39%
  15. Sun92°68°26%
  16. Mon89°64°23%

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

Live wind & temperature near Waterbury

Right now in the garden

Peak growing season

As of August 2, 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 — Waterbury

SPC has placed Waterbury in the Marginal Risk category for severe thunderstorms tomorrow.

  • TODAYTSTMGeneral Thunderstorms
  • TOMORROWMRGLMarginal Risk
  • DAY 3TSTMGeneral Thunderstorms

Isolated severe storms possible. Limited threat for hail or damaging wind.

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.

Sun & seasons in Waterbury

Waterbury sits in Naugatuck Valley County, where the year’s longest day runs 15h 11m of daylight and its shortest just 9h 10m — a swing of +6h 2m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.

Hartford, the state’s largest city, lies about 23 miles to the NE. The nearest town Waterbury tracks is New Haven, roughly 18 miles to the SSE.

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 · August 1–5

Night falls a minute earlier

Sunset retreats perceptibly — daylight shortening speeds up.

Day 214 of 365 · Wedge 43 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

Waterbury's warmest month is July (~73°F mean) and its coldest is January (~28°F). Rainfall peaks in October (4.5 inches) and bottoms out in February (2.9 inches).

MonthMean tempPrecipRainy days
January28°3.0″5
February30°2.9″5
March38°4.0″6
April49°4.1″7
May59°3.5″7
June68°4.0″7
July73°3.4″6
August72°3.5″6
September65°4.3″5
October53°4.5″6
November42°3.4″6
December33°4.1″7

Regional context

Waterbury's climate, from NOAA NCEI 1991-2020 station normals, pairs 28°F Januarys with 73°F Julys — a 45°F swing. About 44.9 inches of precipitation falls over roughly 74 days a year.

No season owns Waterbury's rain: October reaches 4.5 inches across 6.3 days and February keeps 2.9 inches on 5.4, an even spread through Waterbury's year. It is a balanced pattern Waterbury shares with places like Oakville, CT, Naugatuck, CT and Plantsville, CT.

The cool-season window in Waterbury starts at mid-April, when nights stop freezing — think kale, peas, spinach, and parsnips. Hold Waterbury's tender crops — tomatoes, peppers, basil — until 10-14 days past Waterbury's last frost. Around mid-November, freezing nights resume in Waterbury and tender crops must come in. In Waterbury, low spots run 4-7°F colder than nearby slopes, nudging Waterbury's frost dates a week.

Similar climates: Oakville, CT, Naugatuck, CT, Plantsville, CT, Cheshire Village, CT, Terryville, CT.

Naturalist notes

Red maple flowers emerge in late April, their crimson clusters appearing before the leaves unfurl.

American robins begin their dawn chorus in early May, marking the peak of spring migration.

Frequently asked

When does it freeze in Waterbury?
Waterbury's last spring frost lands near mid-April, and in Waterbury the first fall frost follows around mid-November.
What is the rainy season in Waterbury?
October is the wettest month in Waterbury, about 4.5 inches on average; the year totals roughly 45 inches.
What is the warmest month in Waterbury?
July is Waterbury's warmest month, averaging about 73°F.
What is the coldest month in Waterbury?
Waterbury bottoms out in January, with a mean near 28°F.
When can I start a vegetable garden in Waterbury?
Waterbury's last frost (mid-April) cues hardy greens; in Waterbury, hold heat-lovers two weeks past.
How many rainy days does Waterbury get?
Waterbury records around 74 days of measurable precipitation annually.
What hardiness zone is Waterbury?
Waterbury's USDA zone comes from its January mean (28°F); enter the ZIP on the USDA lookup for the number.
What is the 10-day forecast for Waterbury?
Waterbury'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 Waterbury?
See this week's day-by-day rain chances for Waterbury in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Waterbury?
Current conditions for Waterbury and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Waterbury forecast updated?
The Waterbury forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Waterbury?
Today's sunrise and sunset times for Waterbury 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 Waterbury?
The next few days in Waterbury's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Waterbury, Connecticut has a warm-summer humid continental climate: January averages roughly 28°F, July about 73°F, 45°F between them.

Across the year, Waterbury collects about 45 inches of precipitation over roughly 74 days with measurable rain or snow.

Latitude 41.6°N gives Waterbury its 45°F swing, and with it the rhythm of Waterbury's growing season.

All cities in Connecticut →

Bronx, NY weather →

ZIP codes in Waterbury

  • 06708
  • 06702
  • 06704
  • 06705
  • 06706
  • 06710
  • 06701
  • 06703
  • 06720
  • 06721
  • 06722
  • 06723
  • 06724
  • 06725
  • 06726

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.