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

Hartford, Connecticut Weather

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

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

Hartford, CT
Sunday, August 2 at 11:00 AM
80
°
Overcast
Feels like
86°
Humidity
81%
Wind
9 mph
Sunrise
1:46 AM
Sunset
4:07 PM
Hartford, CT
Hour by hour · 24h
24-Hour ForecastHartford, CT: 24-hour forecast. Temperatures range from 74 to 82 degrees Fahrenheit with a 52% chance of precipitation at 8 AM.
L 74°H 82°
Hartford, CT
7-day forecast
  1. Today
    Aug 2
    Overcast
    11%
    —
    82°72°—
  2. Monday
    Aug 3
    Rain
    55%
    0.63″
    81°71°-1°
  3. Tuesday
    Aug 4
    Overcast
    46%
    —
    85°62°+4°
  4. Wednesday
    Aug 5
    Light Showers
    24%
    0.71″
    78°65°-7°
  5. Thursday
    Aug 6
    Drizzle
    46%
    0.03″
    85°71°+7°
  6. Friday
    Aug 7
    Showers
    40%
    0.64″
    92°72°+7°
  7. Saturday
    Aug 8
    Light Drizzle
    28%
    —
    90°71°-2°
Hartford, CT
Next 24 hours · Mild now
71°78°85°12p6p12a6anow 79°high 82°low 74°PRECIP %
Hartford, CT
Anemometer · 24h winds · from true
NESW
From · True
S
181° · veering 24°
Direction
S
181°
Sustained
9
mph
Gust
17
mph
Peak 24h
22
avg 6 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 6 mph · pk 22 mph @ 7:00p
0102030MPHB1B2B3B4B5B6B7-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 2910SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 24° from the s.
Hartford, CT
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1013.1
+0.2 mb in 3h · steady · 29.92 inHg
Now
1013.1
mb
3h
+0.2
mb
12h
+1.0
mb
24h
+0.7
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1011–1013
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1013.41011.21013.2
Air sits at the threshold — small shifts decide the day.
Hartford, CT
Air quality
53
AQI
Moderate
→-4 in 6h

AQI 53 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±4 points). PM2.5 at 11.1 µg/m³, PM10 at 14.2 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
11.1μg/m³
PM 10Good
14μg/m³
NO₂Good
4μg/m³
OzoneModerate
94μg/m³
UV IndexModerate
3.0

What's driving it

Ozone × UV × Sky

Ozone at AQI 44. Overcast through the UV peak window (cloud cover ~72%) — afternoon ozone should stay flat.

Present
AQI 44
UV peak
4.2 at 1 PM
Sky at peak
overcast
Projected peak
AQI 12

PM × Wind × Precip

PM2.5 at 11.1 µg/m³, PM10 at 14.2 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.78
Wind
light
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/m³350
Hartford, CT
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
37.3mi
UNLIMITED
83 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 · 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
15:00 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 · Sunday, August 2
Red sky at night, sailor's delight.
Civil dawn
5:15 AM
Sunrise
1:46 AM
Daylight
14h 21m
Sunset
4:07 PM
Civil dusk
8:40 PM
Planting note
Sow fall peas. Start kale and collard seedlings for fall.
Hartford, CT
The moon
Waning Gibbous
84% illuminated
Moonrise
9:34 PM
Moonset
9:53 AM
In sign
♓︎ Pisces
Hartford, CT
Microseason
Aug 1–5

Night falls a minute earlier

celestial
Jan 159% of the yearDec 31

Read this microseason across nine climate regions →

Hartford at a glance

  • Today vs. normal: 19°F above the seasonal normal for this latitude
  • Last frost: April 27 (climatological average for this latitude)
  • Microseason: Aug 1–5
  • Planting window: Sow fall peas. Start kale and collard seedlings for fall.

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

16-Day Forecast — Hartford

  1. Sun82°72°12%
  2. Mon81°71°55%
  3. Tue85°62°15%
  4. Wed78°65°20%
  5. Thu85°71°44%
  6. Fri92°72°50%
  7. Sat90°71°44%
  8. Sun93°73°28%
  9. Mon97°72°29%
  10. Tue83°66°14%
  11. Wed81°59°15%
  12. Thu70°65°48%
  13. Fri86°69°36%
  14. Sat79°68°32%
  15. Sun93°72°21%
  16. Mon91°66°23%

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

Live wind & temperature near Hartford

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 — Hartford

SPC has placed Hartford 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 Hartford

Hartford sits in Capitol County, where the year’s longest day runs 15h 13m of daylight and its shortest just 9h 8m — a swing of +6h 5m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.

Bridgeport, the state’s largest city, lies about 48 miles to the SW. The nearest town Hartford tracks is Waterbury, roughly 23 miles to the SW.

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

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.