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

Blue Hills, Connecticut Weather

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

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

Blue Hills, CT
Saturday, July 4 at 5:15 AM
76
°
Clear
Feels like
82°
Humidity
81%
Wind
3 mph
Sunrise
1:21 AM
Sunset
4:29 PM
Blue Hills, CT
Hour by hour · 24h
24-Hour ForecastBlue Hills, CT: 24-hour forecast. Temperatures range from 73 to 91 degrees Fahrenheit with a 25% chance of precipitation at 11 PM.
L 73°H 91°
Blue Hills, CT
7-day forecast
  1. Today
    Jul 4
    Heavy Showers
    25%
    0.64″
    91°76°—
  2. Sunday
    Jul 5
    Light Drizzle
    44%
    0.02″
    87°69°-4°
  3. Monday
    Jul 6
    Showers
    71%
    1.5″
    71°62°-16°
  4. Tuesday
    Jul 7
    Rain
    66%
    0.30″
    62°59°-9°
  5. Wednesday
    Jul 8
    Overcast
    —
    —
    80°57°+18°
  6. Thursday
    Jul 9
    Light Drizzle
    15%
    —
    91°63°+11°
  7. Friday
    Jul 10
    Overcast
    37%
    —
    87°67°-4°
Blue Hills, CT
Next 24 hours · Mild now
HOT 90°68°82°96°6a12p6p12anow 76°high 91°low 73°PRECIP %
Blue Hills, CT
Anemometer · 24h winds · from true
NESW
From · True
SW
235° · backing 42°
Direction
SW
235°
Sustained
3
mph
Gust
8
mph
Peak 24h
23
avg 7
Beaufort · 1 · LIGHT AIR
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 · pk 23 @ 6:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 212SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 42° from the sw.
Blue Hills, CT
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1005.7
+0.4 mb in 3h · steady · 29.70 inHg
Now
1005.7
mb
3h
+0.4
mb
12h
+0.3
mb
24h
-1.6
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1005–1008
1000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR-21h-18h-15h-12h-9h-6h-3h-24hNOW1007.91004.61005.8
−24h−18h−12h−6hnow
Damp, unsettled regime — wet weather lingers nearby.
Blue Hills, CT
Air quality
42
AQI
Good
↓-5 in 6h

AQI 42 (Good), driven by PM2.5. AQI down 5 over the last 6 hours (gradual decline). PM2.5 at 8.5 µg/m³ (AQI 47) with a 0.92 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.

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

PM 2.5DRIVERGood
8.5μg/m³
PM 10Good
9μg/m³
NO₂Good
3μg/m³
OzoneModerate
88μg/m³
UV IndexLow
0.0

What's driving it

Ozone × UV × Sky

Ozone at AQI 42. Overcast through the UV peak window (cloud cover ~70%) — afternoon ozone should stay flat.

Present
AQI 42
UV peak
3.3 at 1 PM
Sky at peak
overcast
Projected peak
AQI 9

PM × Wind × Precip

PM2.5 at 8.5 µg/m³ (AQI 47) with a 0.92 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.92
Wind
calm
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/m³330
Blue Hills, CT
Sky cover · visibility · 24h
Cloud cover
1%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
39.3mi
UNLIMITED
100 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
09:15 UTC · Blue Hills, 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
09:15 UTC · Blue Hills, CT · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Blue Hills, CT
Satellite · infrared · animated
Blue Hills, CT
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Blue Hills, CT
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
1:21 AM
Daylight
15h 08m
Sunset
4:29 PM
Civil dusk
9:04 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Blue Hills, CT
The moon
Waning Gibbous
83% illuminated
Moonrise
10:47 PM
Moonset
9:52 AM
In sign
♓︎ Pisces
Blue Hills, CT
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Blue Hills at a glance

  • Today vs. normal: 6°F above the seasonal normal for this latitude
  • Last frost: April 27 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

15-Day Forecast — Blue Hills

  1. Sat93°76°25%
  2. Sun87°69°44%
  3. Mon71°62°71%
  4. Tue62°59°66%
  5. Wed80°57°8%
  6. Thu91°63°15%
  7. Fri87°67°37%
  8. Sat85°59°24%
  9. Sun74°62°25%
  10. Mon81°63°16%
  11. Tue92°65°21%
  12. Wed80°65°26%
  13. Thu87°60°29%
  14. Fri92°64°34%
  15. Sat80°66°45%

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 — Blue Hills

SPC includes Blue Hills in the general thunderstorm area today — no severe risk, but storms are possible.

  • TODAYTSTMGeneral Thunderstorms
  • TOMORROWTSTMGeneral Thunderstorms
  • DAY 3TSTMGeneral Thunderstorms

Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.

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

Blue Hills's warmest month is July (~75°F mean) and its coldest is January (~28°F). Rainfall peaks in December (4.2 inches) and bottoms out in February (2.9 inches).

MonthMean tempPrecipRainy days
January28°3.5″14
February30°2.9″13
March38°3.5″16
April50°3.9″18
May58°3.6″19
June68°3.7″18
July75°3.5″18
August74°3.8″17
September67°3.4″14
October56°3.4″13
November43°4.1″13
December33°4.2″14

Frequently asked

When does it freeze in Blue Hills?
Blue Hills's last spring frost lands near mid-April, and in Blue Hills the first fall frost follows around mid-November.
What is the rainy season in Blue Hills?
Blue Hills sees its heaviest rain in December (around 4.2 inches), part of roughly 44 inches a year.
What is the warmest month in Blue Hills?
On average July tops the year in Blue Hills at about 75°F.
What is the coldest month in Blue Hills?
The coldest stretch in Blue Hills falls in January, around 28°F on average.
When can I start a vegetable garden in Blue Hills?
In Blue Hills, sow peas and hardy greens around mid-April; Blue Hills's tomatoes and peppers wait two weeks more.
How many rainy days does Blue Hills get?
Expect roughly 185 wet days a year in Blue Hills.
What hardiness zone is Blue Hills?
Because Blue Hills bottoms near 28°F in January, that winter low sets Blue Hills's USDA zone — verify by ZIP.
What is the 10-day forecast for Blue Hills?
Blue Hills'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 Blue Hills?
See this week's day-by-day rain chances for Blue Hills in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Blue Hills?
Current conditions for Blue Hills and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Blue Hills forecast updated?
The Blue Hills forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Blue Hills?
Today's sunrise and sunset times for Blue Hills 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 Blue Hills?
The next few days in Blue Hills'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, Blue Hills, Connecticut swings from 28°F in the heart of winter to 75°F at midsummer — a 47°F arc.

Rain and snow bring Blue Hills roughly 44 inches a year across approximately 185 measurable-precipitation days.

Blue Hills sits at 41.8°N; that 47°F seasonal swing frames planting windows and frost dates across Blue Hills.

All cities in Connecticut →

Hartford, CT weather →

ZIP codes in Blue Hills

  • 06002

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.