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

Hartford, Connecticut Weather

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

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

Hartford, CT
Saturday, July 4 at 7:44 AM
81
°
Clear
Feels like
88°
Humidity
74%
Wind
5 mph
Sunrise
1:21 AM
Sunset
4:28 PM
Hartford, CT
Hour by hour · 24h
24-Hour ForecastHartford, CT: 24-hour forecast. Temperatures range from 69 to 96 degrees Fahrenheit with a 25% chance of precipitation at 11 PM.
L 69°H 96°
Hartford, CT
7-day forecast
  1. Today
    Jul 4
    Drizzle
    25%
    0.07″
    96°77°—
  2. Sunday
    Jul 5
    Rain
    44%
    0.15″
    87°69°-9°
  3. Monday
    Jul 6
    Showers
    72%
    3.6″
    71°62°-16°
  4. Tuesday
    Jul 7
    Heavy Rain
    68%
    3.4″
    63°59°-8°
  5. Wednesday
    Jul 8
    Overcast
    —
    —
    80°57°+17°
  6. Thursday
    Jul 9
    Partly Cloudy
    15%
    —
    92°63°+12°
  7. Friday
    Jul 10
    Light Drizzle
    38%
    —
    87°68°-5°
Hartford, CT
Next 24 hours · Mild now
HOT 90°60°83°105°6a12p6p12anow 79°high 96°low 69°PRECIP %
Hartford, CT
Anemometer · 24h winds · from true
NESW
From · True
W
280° · veering 6°
Direction
W
280°
Sustained
5
mph
Gust
14
mph
Peak 24h
22
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 22 @ 6:00p
010203040MPHB1B2B3B4B5B6B7B8-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 339SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 6° from the w.
Hartford, CT
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1009.3
-0.4 mb in 3h · steady · 29.80 inHg
Now
1009.3
mb
3h
-0.4
mb
12h
+0.3
mb
24h
-2.7
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1009–1012
1000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1012.01008.61009.3
−24h−18h−12h−6hnow
Damp, unsettled regime — wet weather lingers nearby.
Hartford, CT
Air quality
35
AQI
Good
→-2 in 6h▲Peak ~49 @ 6 PM

AQI 35 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 7.8 µg/m³ (AQI 43) with a 0.92 fine-to-coarse ratio and 5 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 during the projected peak around 6 PM.

PM 2.5DRIVERGood
7.8μg/m³
PM 10Good
9μg/m³
NO₂Good
4μg/m³
OzoneModerate
83μg/m³
UV IndexLow
0.6

What's driving it

Ozone × UV × Sky

Ozone at AQI 39 now. With UV 2.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 10 around 1 PM.

Present
AQI 39
UV peak
2.0 at 1 PM
Sky at peak
clear
Projected peak
AQI 10

PM × Wind × Precip

PM2.5 at 7.8 µg/m³ (AQI 43) with a 0.92 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.92
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/m³550
Hartford, CT
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
44.4mi
UNLIMITED
97 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
11:44 UTC · Hartford, 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
11:44 UTC · Hartford, CT · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Hartford, CT
Satellite · infrared · animated
Hartford, CT
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Hartford, 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 07m
Sunset
4:28 PM
Civil dusk
9:03 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Hartford, CT
The moon
Waning Gibbous
82% illuminated
Moonrise
10:47 PM
Moonset
9:52 AM
In sign
♓︎ Pisces
Hartford, CT
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Hartford at a glance

  • Today vs. normal: 11°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.

ZIP codes: 06103, 06105, 06106, 06112, 06114, 06120

15-Day Forecast — Hartford

  1. Sat96°77°25%
  2. Sun87°69°44%
  3. Mon71°62°72%
  4. Tue63°59°68%
  5. Wed80°57°9%
  6. Thu92°63°15%
  7. Fri87°68°38%
  8. Sat86°60°24%
  9. Sun74°63°26%
  10. Mon82°63°16%
  11. Tue92°65°21%
  12. Wed80°65°26%
  13. Thu87°60°29%
  14. Fri92°64°34%
  15. Sat81°67°45%

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

Live wind & temperature near Hartford

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 — Hartford

SPC includes Hartford 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

In Hartford, July runs warmest near 75°F and January coldest around 28°F, while December is the wettest month (4.2 inches) and February the driest (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

Regional context

Per NOAA NCEI 1991-2020 normals, Hartford runs from a 28°F January mean to 75°F in July, a 47°F seasonal spread, with near 43.6 inches of precipitation across about 185 wet days.

No season owns Hartford's rain: December reaches 4.2 inches across 13.9 days and February keeps 2.9 inches on 13.1, an even spread through Hartford's year. That even rhythm groups Hartford with places like Blue Hills, CT, Glastonbury Center, CT and New Britain, CT.

Around mid-April, Hartford sheds its freezing nights — kale, peas, spinach, and parsnips go into Hartford's beds. Tomatoes and peppers do best set out two weeks later in Hartford, once nights clear the mid-40s°F. Frost returns to Hartford near mid-November, ending the tender-crop season. A creek-bottom lot in Hartford can lag Hartford's last frost 7-10 days behind a south slope.

Similar climates: Blue Hills, CT, Glastonbury Center, CT, New Britain, CT, Weatogue, CT, Simsbury Center, CT.

Naturalist notes

Red maple buds begin swelling in late March as daylight hours lengthen past winter's grip.

American robins return to Hartford lawns in early April, their arrival coinciding with soil temperatures that awaken earthworms.

Frequently asked

When does it freeze in Hartford?
In Hartford, expect the last spring frost near mid-April; Hartford's first autumn frost comes around mid-November.
What is the rainy season in Hartford?
Hartford sees its heaviest rain in December (around 4.2 inches), part of roughly 44 inches a year.
What is the warmest month in Hartford?
On average July tops the year in Hartford at about 75°F.
What is the coldest month in Hartford?
The coldest stretch in Hartford falls in January, around 28°F on average.
When can I start a vegetable garden in Hartford?
Around mid-April, start frost-hardy crops in Hartford; tomatoes and basil belong a fortnight later.
How many rainy days does Hartford get?
Hartford records around 185 days of measurable precipitation annually.
What hardiness zone is Hartford?
Since January in Hartford averages 28°F, Hartford's USDA zone follows that floor — confirm it by ZIP.
What is the 10-day forecast for Hartford?
Hartford'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 Hartford?
See this week's day-by-day rain chances for Hartford in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Hartford?
Current conditions for Hartford and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Hartford forecast updated?
The Hartford forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Hartford?
Today's sunrise and sunset times for Hartford 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 Hartford?
The next few days in Hartford's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

In Hartford, Connecticut, the warm-summer humid continental climate runs from about 28°F in January to 75°F in July, a 47°F seasonal range.

Yearly precipitation in Hartford totals around 44 inches, spread over about 185 days of rain or snow.

Hartford's 47°F range, set by its 41.8°N position, drives frost timing and what thrives in Hartford.

All cities in Connecticut →

New York, NY weather →

ZIP codes in Hartford

  • 06106
  • 06105
  • 06103
  • 06120
  • 06112
  • 06114
  • 06101
  • 06102
  • 06104
  • 06115
  • 06123
  • 06126
  • 06127
  • 06132
  • 06133
  • 06134
  • 06140
  • 06141
  • 06142
  • 06143
  • 06144
  • 06145
  • 06146
  • 06147
  • 06150
  • 06151
  • 06152
  • 06154
  • 06160
  • 06167
  • 06176
  • 06183

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.