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Ansonia, Connecticut Weather

Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →

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

Ansonia, CT
Sunday, July 5 at 1:00 AM
73
°
Overcast
Feels like
79°
Humidity
92%
Wind
5 mph
Sunrise
1:25 AM
Sunset
4:28 PM
Ansonia, CT
Hour by hour · 24h
24-Hour ForecastAnsonia, CT: 24-hour forecast. Temperatures range from 71 to 83 degrees Fahrenheit with a 46% chance of precipitation at 2 AM.
L 71°H 83°
Ansonia, CT
7-day forecast
  1. Today
    Jul 5
    Light Drizzle
    46%
    0.02″
    83°72°—
  2. Monday
    Jul 6
    Heavy Rain
    88%
    1.7″
    71°62°-12°
  3. Tuesday
    Jul 7
    Light Rain
    83%
    0.13″
    65°61°-6°
  4. Wednesday
    Jul 8
    Overcast
    23%
    —
    75°55°+10°
  5. Thursday
    Jul 9
    Drizzle
    25%
    0.06″
    82°62°+7°
  6. Friday
    Jul 10
    Drizzle
    49%
    0.02″
    88°68°+6°
  7. Saturday
    Jul 11
    Overcast
    27%
    —
    84°65°-4°
Ansonia, CT
Next 24 hours · Mild now
68°77°86°12a6a12p6pnow 73°high 83°low 71°PRECIP %
Ansonia, CT
Anemometer · 24h winds · from true
NESW
From · True
SW
235° · backing 56°
Direction
SW
235°
Sustained
5
mph
Gust
13
mph
Peak 24h
25
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 25 @ 9:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 177SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 56° from the sw.
Ansonia, CT
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1010.3
+1.3 mb in 3h · rising · 29.83 inHg
Now
1010.3
mb
3h
+1.3
mb
12h
+2.4
mb
24h
+2.5
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1005–1010
1000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR-21h-18h-15h-12h-9h-6h-3h-24hNOW1010.31005.11010.3
−24h−18h−12h−6hnow
Pressure climbing through the change line — drier air pushing in.
Ansonia, CT
Air quality
41
AQI
Good
↓-32 in 6h

AQI 41 (Good), driven by Ozone. AQI down 32 over the last 6 hours — air quality is improving sharply. Ozone at AQI 30. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.

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

PM 2.5Good
4.6μg/m³
PM 10Good
5μg/m³
NO₂Good
8μg/m³
OzoneDRIVERModerate
63μg/m³
UV IndexLow
0.0

What's driving it

Ozone × UV × Sky

Ozone at AQI 30. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.

Present
AQI 30
UV peak
3.3 at 1 PM
Sky at peak
overcast
Projected peak
AQI 7

PM × Wind × Precip

PM2.5 at 4.6 µg/m³ (AQI 26) with a 0.98 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.98
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 TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³500
Ansonia, CT
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
27.3mi
UNLIMITED
88 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
05:00 UTC · Ansonia, 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
05:00 UTC · Ansonia, CT · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Ansonia, CT
Satellite · infrared · animated
Ansonia, CT
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Ansonia, CT
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
4:52 AM
Sunrise
1:25 AM
Daylight
15h 03m
Sunset
4:28 PM
Civil dusk
9:03 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Ansonia, CT
The moon
Waning Gibbous
76% illuminated
Moonrise
11:10 PM
Moonset
11:01 AM
In sign
♓︎ Pisces
Ansonia, CT
Microseason
Jul 1–5

Cicadas claim the afternoon

fish
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Ansonia at a glance

  • Today vs. normal: 3°F above the seasonal normal for this latitude
  • Last frost: April 24 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 06401

15-Day Forecast — Ansonia

  1. Sun83°72°46%
  2. Mon71°62°88%
  3. Tue65°61°83%
  4. Wed75°55°23%
  5. Thu82°62°25%
  6. Fri88°68°49%
  7. Sat84°65°27%
  8. Sun78°62°27%
  9. Mon81°59°16%
  10. Tue84°63°22%
  11. Wed88°68°39%
  12. Thu85°62°35%
  13. Fri83°62°30%
  14. Sat87°63°30%
  15. Sun96°72°35%

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

Right now in the garden

Peak growing season

As of July 5, 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 — Ansonia

SPC has placed Ansonia 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 186 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

In Ansonia, July runs warmest near 75°F and January coldest around 30°F, while December is the wettest month (4.7 inches) and February the driest (3.3 inches).

MonthMean tempPrecipRainy days
January30°4.0″14
February32°3.3″14
March39°3.9″16
April50°4.3″18
May58°4.0″19
June68°3.9″18
July75°3.6″18
August74°4.0″17
September68°3.7″14
October58°3.7″13
November45°4.6″14
December35°4.7″14

Regional context

By the nearest station's NOAA NCEI 1991-2020 normals, Ansonia sees 30°F Januarys and 75°F Julys, a 45°F range, plus around 47.7 inches of precipitation across 188 days.

No season owns Ansonia's rain: December reaches 4.7 inches across 13.9 days and February keeps 3.3 inches on 13.5, an even spread through Ansonia's year. That even rhythm groups Ansonia with places like Derby, CT, Shelton, CT and East Village, CT.

Ansonia's growing window opens around mid-April, once Ansonia's overnight lows stop freezing — sow peas, lettuce, spinach, and radishes. Warm-soil crops in Ansonia wait about two weeks past Ansonia's last frost, once the soil warms. It shuts near mid-November, when freezes return to Ansonia and tender plants need cover. In Ansonia, low spots run 4-7°F colder than nearby slopes, nudging Ansonia's frost dates a week.

Similar climates: Derby, CT, Shelton, CT, East Village, CT, Oronoque, CT, West Haven, CT.

Frequently asked

When does it freeze in Ansonia?
Frost typically leaves Ansonia by mid-April and returns to Ansonia near mid-November.
What is the rainy season in Ansonia?
Rainfall in Ansonia peaks in December near 4.7 inches, out of about 48 inches annually.
What is the warmest month in Ansonia?
July is Ansonia's warmest month, averaging about 75°F.
What is the coldest month in Ansonia?
Ansonia bottoms out in January, with a mean near 30°F.
When can I start a vegetable garden in Ansonia?
Ansonia's last frost (mid-April) cues hardy greens; in Ansonia, hold heat-lovers two weeks past.
How many rainy days does Ansonia get?
Ansonia averages about 188 days with measurable rain or snow each year.
What hardiness zone is Ansonia?
Ansonia's USDA zone comes from its January mean (30°F); enter the ZIP on the USDA lookup for the number.
What is the 10-day forecast for Ansonia?
Ansonia'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 Ansonia?
See this week's day-by-day rain chances for Ansonia in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Ansonia?
Current conditions for Ansonia and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Ansonia forecast updated?
The Ansonia forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Ansonia?
Today's sunrise and sunset times for Ansonia 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 Ansonia?
The next few days in Ansonia's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Ansonia, Connecticut has a warm-summer humid continental climate: January averages roughly 30°F, July about 75°F, 45°F between them.

Rain and snow bring Ansonia roughly 48 inches a year across approximately 188 measurable-precipitation days.

Latitude 41.3°N gives Ansonia its 45°F swing, and with it the rhythm of Ansonia's growing season.

All cities in Connecticut →

New Haven, CT weather →

ZIP codes in Ansonia

  • 06401

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.