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Hartford, Vermont 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Hartford VT
National Weather Service Forecast for: Hartford VT
Issued by: National Weather Service Burlington, VT
Updated: 7:42 pm EDT Jul 24, 2025
 
Overnight

Overnight: Mostly clear, with a low around 69. South wind 3 to 6 mph.
Mostly Clear

Friday

Friday: Showers and thunderstorms likely, mainly before 3pm, then showers likely and possibly a thunderstorm after 4pm.  Partly sunny, with a high near 87. Calm wind becoming west around 6 mph in the morning.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Showers
Likely
Friday
Night
Friday Night: A 30 percent chance of showers, mainly before 7pm.  Partly cloudy, with a low around 60. North wind around 5 mph becoming calm  in the evening.  New precipitation amounts of less than a tenth of an inch possible.
Chance
Showers then
Partly Cloudy
Saturday

Saturday: Mostly sunny, with a high near 87. Calm wind.
Mostly Sunny

Saturday
Night
Saturday Night: Mostly cloudy, with a low around 63. Calm wind.
Mostly Cloudy

Sunday

Sunday: A 50 percent chance of showers and thunderstorms after 2pm.  Mostly cloudy, with a high near 82. Calm wind becoming south around 6 mph in the afternoon.  New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Mostly Cloudy
then Chance
T-storms
Sunday
Night
Sunday Night: A 30 percent chance of showers and thunderstorms before 8pm.  Mostly cloudy, with a low around 65. Light and variable wind.
Chance
T-storms then
Mostly Cloudy
Monday

Monday: Mostly sunny and hot, with a high near 91. Light northwest wind.
Hot

Monday
Night
Monday Night: Partly cloudy, with a low around 67. Calm wind.
Partly Cloudy

Lo 69 °F Hi 87 °F Lo 60 °F Hi 87 °F Lo 63 °F Hi 82 °F Lo 65 °F Hi 91 °F Lo 67 °F

Hazardous Weather Outlook
 

Overnight
 
Mostly clear, with a low around 69. South wind 3 to 6 mph.
Friday
 
Showers and thunderstorms likely, mainly before 3pm, then showers likely and possibly a thunderstorm after 4pm. Partly sunny, with a high near 87. Calm wind becoming west around 6 mph in the morning. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
 
A 30 percent chance of showers, mainly before 7pm. Partly cloudy, with a low around 60. North wind around 5 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Saturday
 
Mostly sunny, with a high near 87. Calm wind.
Saturday Night
 
Mostly cloudy, with a low around 63. Calm wind.
Sunday
 
A 50 percent chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 82. Calm wind becoming south around 6 mph in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
 
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 65. Light and variable wind.
Monday
 
Mostly sunny and hot, with a high near 91. Light northwest wind.
Monday Night
 
Partly cloudy, with a low around 67. Calm wind.
Tuesday
 
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 91. Calm wind becoming west around 6 mph in the afternoon.
Tuesday Night
 
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65. Light northwest wind.
Wednesday
 
Partly sunny, with a high near 82. Northwest wind 3 to 6 mph.
Wednesday Night
 
Partly cloudy, with a low around 57. Light northwest wind.
Thursday
 
Mostly sunny, with a high near 78. Calm wind becoming northwest around 6 mph in the afternoon.

 

Forecast from NOAA-NWS for Hartford VT.

Weather Forecast Discussion
548
FXUS61 KBOX 242313
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
713 PM EDT Thu Jul 24 2025

.SYNOPSIS...
Peak of heat expected Friday with elevated humidity resulting in
impactful heat, potentially dangerous if precautions not taken.
Highs expected in low-mid 90s, but will feel more like upper 90s to
low 100s. Showers and thunderstorms possible later Friday with a
cold front. Cooler and mainly dry Saturday with showers and
thunderstorms returning for Sunday. Outlook for early next week
shows summerlike warmth and humidity, with generally dry weather for
the majority of the time.

&&

.NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
Wonderful summer afternoon across southern New England under a bit
of fair weather clouds. Temperatures are seasonable in the mid to
upper 80s and increasing dew points in the mid 60s. Over all there
are no weather concerns this afternoon or tonight. Overnight surface
high will shift further off shore. Clear skies tonight with a steady
southwest wind keep the boundary layer well-mixed and should limit
the development of coastal fog/stratus, despite increasing low-level
moisture. Temperatures dip into the low 70s and upper 60s overnight
with dew points in the upper 60s.

&&

.SHORT TERM /6 AM FRIDAY MORNING THROUGH FRIDAY NIGHT/...
Key Messages:

* Dangerous heat and humidity for communities away from coastal RI
  and southern coast of MA.

* Isolated to scattered thunderstorms Friday afternoon which could
  be strong to severe - with damaging wind gusts as the primary
  threat. A secondary threat, locally heavy rainfall may lead to
  isolated flash flooding.

Friday will be the warmest and most humid day of the stretch. 925mb
temperatures reach the mid 20s Celsius and with a well-mixed BL will
have maximum temperatures in the lower to middle 90s. It is less hot
near the south coast (due to SW flow off the water) with a maximum
temperature in the middle to upper 80s. Heat Advisory remains in
effect for southern New England, excluding Cape Cod, islands, south
coast of MA & RI, and the Berkshires. Dews increase to the low 70s
but not out of the question we near 75F, this is tropical-like feel
and leads to heat incites in the upper 90s to lower 100s.

Storms are possible during the afternoon ahead of a 500mb trough and
surface cold front. Timing has come into better agreement for storm
development between 2pm and 8pm, the NSSL would be the only
outlier with an earlier initialization around noon in far
northwest MA. And storms clear the Cape and Islands by
10pm/midnight. There are good ingredients for a few strong to
severe thunderstorms, HREF mean CAPE are ~1,800J/kg, steep low-
level lapse rates of ~9C/km, and modest effective shear of 30 to
35 knots. We are lacking mid-level lapse rates, as we move past
sunset and lose that daytime heating, storms will begin to
fade. A few of these storms may pack a punch, SPC has upgraded
parts of southern New England to a slight risk, so a level 2 out
of 5. Thinking the main concerns are damaging straight line
winds and locally heavy rainfall within any convective storm. A
friendly reminder if you can hear thunder, move indoors, because
you are close enough to be struck by lightning!

As mentioned above, heavy rainfall rates may pose a risk for
isolated flash flooding. PWATs are near the daily climatological
records with forecast values near 2.3", couple this with deep
warm cloud layer of 12,000 ft and potential for slow moving
storms. HREF probability of the 6-hour precipitation exceeding
the 10 year ARI across eastern CT and western RI at 15% to 25% -
will need to be mindful of those areas prone to flash flooding,
but do not feel this is a widespread flash flooding event. But
would not be surprised if someone were to pick up a quick 1-3
inches under one of these heavier downpours. Did collaborate
those concerns with WPC and have expanded the marginal risk into
southern New England for Friday.

Friday night the cold front moves off shore and high pressure moves
down from Canada. Will lead to clearing skies and lowering humidity.
Wind shifts from the SSW to WSW during the evening, but will become
more NNW after midnight. Temperatures settle into the low and middle
60s across the Berkshires and northern Worcester Hills, elsewhere
will have lows in the upper 60s to low 70s.

&&

.LONG TERM /SATURDAY THROUGH THURSDAY/...
Key Messages:

* Dry and cooler on Saturday.

* Showers and thunderstorms around Sunday.

* High temps mainly in the 80s next week with a few shower/storm
  chances but mostly dry.

Saturday and Sunday...

A drier post frontal airmass works its way into southern New England
on NW flow as surface high pressure drifts overhead beneath mid
level ridging. This will make for a nice, dry day for the first half
of the weekend featuring plenty of sun, light winds, and seasonable
temperatures. Inland locations will reach into the 80s while an
easterly onshore flow keeps the immediate east coast closer to the
upper 70s.

Sunday is more active as a subtle shortwave slides overhead through
the quasi-zonal flow and dewpoints increase with backing surface
winds. Thus, can expect increasing clouds and rain/thunderstorm
chances through the day on Sunday, though timing is uncertain; some
locations (especially east) may see more rain late Sunday into the
overnight hours.

Next week...

Beyond Sunday`s disturbance the region remains under generally NW
steering flow with a series of weak shortwaves moving through and
bringing periodic chances for unsettled weather. No strong signals
at this point for a large/organized system, and majority of the week
should be dry. As we get toward the latter half of the week guidance
suggests a building surface high which would keep things quiet into
the weekend.

&&

.AVIATION /23Z THURSDAY THROUGH TUESDAY/...
Forecaster Confidence Levels...

Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.

00Z update...

Tonight: High Confidence.

VFR. SSW to SW winds will ease overnight, with speeds 8 to 12
knots. There is a low chance of patchy fog/low stratus to
develop across the southern waters, impacting terminals across
southern Rhode Island and the southern coast of Massachusetts.
With lower confidence in this, opt`d to exclude from TAF
issuance.

Friday: Moderate in timing of storms, but high confidence in trends.

VFR. SSW to SW wind ahead of an approaching cold front, occasional
gusts up to 20 knots are possible. Isolated to scattered TSRA is
possible, hence the moderate confidence, across southern New England
after 18z and should be wrapping up by 02z. Opt`d to include a
PROB30 for TSRA at most terminals between 19z and 23z per
latest CAMS. Within t`storms can expect brief MVFR conditions,
gusty winds, torrential rain, and frequent lightning.

Friday Night: High Confidence.

Any lingering storms exit the coastal waters/islands by 06z and wind
shifts from the SSW/SW to the W/WNW with speeds 8 to 12 knots.
Ceilings are generally VFR with lingering MVFR possible for the
outer Cape and Islands.

KBOS terminal...High confidence trends, moderate confidence in
timing for KBOS TAF. Exact timing of line of storms and
subsequent wind shift to NW is only moderate.

KBDL terminal...High confidence trends, moderate confidence in
timing for KBDL TAF.

Outlook /Saturday through Tuesday/...

Saturday through Saturday Night: VFR.

Sunday: Mainly VFR, with local MVFR possible. Breezy. Chance
SHRA, chance TSRA.

Sunday Night: VFR. Breezy. Chance SHRA, slight chance TSRA.

Monday through Monday Night: VFR.

Tuesday: Breezy. Slight chance SHRA, slight chance TSRA.

&&

.MARINE...
Forecaster Confidence Levels...

Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.

Tonight...High Confidence.

Winds S to SW 10-20 kts. Gusts to 25 kts. Up to 30 kts possible over
the northern outer waters with sustained winds around 25 kts. Seas 3
to 5 ft possible in the northern waters, only to 3 ft everywhere
else. A Small Craft Advisory is in effect over the outer northern
waters from 20z Thursday through 12z Friday.

Friday and Friday Night...High Confidence.

SW winds 10-15 kts, closer to 20 kts for the southern waters.
Gusts 20-25 kts. Borderline criteria for SCAs for southern waters,
Cape Cod Bay, Nantucket Sound and Buzzards Bay. Storms develop late
afternoon into early evening as a cold front slides from the
northwest to southeast, then pushing south of the waters by early
Saturday morning. This does shift the wind to the NNW.

Outlook /Saturday through Tuesday/...

Saturday through Saturday Night: Winds less than 25 kt.

Sunday: Winds less than 25 kt. Slight chance of rain showers,
slight chance of thunderstorms.

Sunday Night: Winds less than 25 kt. Seas locally approaching
5 ft. Chance of rain showers, slight chance of thunderstorms.

Monday through Tuesday: Winds less than 25 kt.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Air Quality Alert until 11 PM EDT this evening for CTZ002.
     Heat Advisory until 8 PM EDT Friday for CTZ002>004.
MA...Heat Advisory until 8 PM EDT Friday for MAZ003>007-010>019-026.
RI...Heat Advisory until 8 PM EDT Friday for RIZ001>004.
MARINE...Small Craft Advisory until 8 AM EDT Friday for ANZ250.

&&

$$

SYNOPSIS...BW/Dooley
NEAR TERM...Dooley
SHORT TERM...Dooley
LONG TERM...BW
AVIATION...BW/Dooley
MARINE...BW/Dooley
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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