New Britain, Connecticut 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for New Britain CT
National Weather Service Forecast for:
New Britain CT
Issued by: National Weather Service Norton, MA |
Updated: 2:22 am EDT Jul 13, 2025 |
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Today
 Patchy Fog then Partly Sunny
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Tonight
 Mostly Cloudy then Patchy Fog
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Monday
 Chance Showers then Chance T-storms
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Monday Night
 Chance T-storms
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Tuesday
 Slight Chance Showers then Slight Chance T-storms
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Tuesday Night
 Slight Chance T-storms then Partly Cloudy
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Wednesday
 Hot
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Wednesday Night
 Mostly Cloudy
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Thursday
 Mostly Cloudy then Chance T-storms
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Hi 84 °F |
Lo 69 °F |
Hi 85 °F |
Lo 71 °F |
Hi 90 °F |
Lo 71 °F |
Hi 92 °F |
Lo 74 °F |
Hi 89 °F |
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Today
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Patchy fog before 7am. Otherwise, partly sunny, with a high near 84. Calm wind becoming south 5 to 8 mph in the afternoon. |
Tonight
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Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 69. South wind 5 to 7 mph becoming calm in the evening. |
Monday
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A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 85. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. |
Monday Night
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A chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, with a low around 71. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. |
Tuesday
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A slight chance of showers, with thunderstorms also possible after 2pm. Partly sunny and hot, with a high near 90. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 20%. |
Tuesday Night
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A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Partly cloudy, with a low around 71. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%. |
Wednesday
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Mostly sunny and hot, with a high near 92. Calm wind becoming south 5 to 8 mph in the afternoon. |
Wednesday Night
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Mostly cloudy, with a low around 74. South wind 5 to 7 mph. |
Thursday
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A chance of showers between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 89. Southwest wind 6 to 9 mph. Chance of precipitation is 40%. |
Thursday Night
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A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 74. Southwest wind 5 to 7 mph. Chance of precipitation is 40%. |
Friday
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A chance of showers and thunderstorms. Partly sunny and hot, with a high near 90. West wind 5 to 8 mph. Chance of precipitation is 30%. |
Friday Night
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A chance of showers and thunderstorms. Partly cloudy, with a low around 70. North wind around 6 mph. Chance of precipitation is 30%. |
Saturday
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Mostly sunny, with a high near 88. North wind 5 to 7 mph becoming west in the afternoon. |
Forecast from NOAA-NWS
for New Britain CT.
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Weather Forecast Discussion
915
FXUS61 KBOX 130633
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
233 AM EDT Sun Jul 13 2025
.SYNOPSIS...
Mainly dry with seasonably warm and humid conditions continue
Sunday and most of Monday. A frontal system could bring showers
and thunderstorms on Monday evening. Increasing heat and
humidity around the middle of next week, which then looks to
break around Friday as a cold front brings yet another risk for
showers and thunderstorms.
&&
.NEAR TERM /THROUGH TODAY/...
Key Point
* Seasonably warm and dry today
Very little change in airmass today as high pressure remains
offshore over the Gulf of Maine with a mid-level ridge over the
region. Low stratus and fog have once again spread across the
region as a result of the dewpoints in the 60s and light onshore ESE
flow. The fog should burn off between 7am-9am again today, later
across the Cape and Islands. After the low clouds and fog burn off
and lift, we should see mostly sunny skies once again for the
afternoon. High temperatures warm into the low to mid-80s, with
dewpoints still in the mid-to-upper 60s. Storm remains well west of
the SNE today as the axis of instability moves further NW with the
convergence boundary.
&&
.SHORT TERM /TONIGHT THROUGH 6 PM MONDAY/...
Key Points
* Seasonably weather again on Monday
* Frontal system may bring heavy rain and localized flash flooding
late Monday
Tonight:
Another rinse and repeat with low stratus and fog forming first
along the south coast and gradually lifting north through the night
with continued ESE onshore flow. Low temperatures remain bound by
the dewpoints again in the mid to upper 60s.
Monday:
A shortwave trough and weak frontal system exit the Great
Lakes and reach SNE late in the day. Before the frontal system gets
here, a rather similar day to Sunday with low clouds and fog burning
off by mid-morning, giving way to partly to mostly sunny skies and
highs in the low to mid-80s. MLCAPE values should climb into the
500-1000 J/kg range across the interior in the afternoon. Shear and
mid-level lapse rate are still lacking on Monday despite the weak
shortwave moving through. With the frontal system likely arriving
in the evening, possibly even after sunset, this should limit the
severe wind threat. The primary risk associated with thunderstorms
will be heavy rain and localized flash flooding. Weak shear means
storms will be slow-moving with little upscale growth. PWATS will
increase to around 1.8 inches on Monday, with warm cloud depths
reaching as high as 14,000 feet. Don`t think a flood watch will be
needed at this time due to uncertainty on the frontal timing and
convective placement, but future shifts may consider if confidence
begins to increase.
&&
.LONG TERM /MONDAY NIGHT THROUGH SATURDAY/...
Key Messages:
* Very warm to hot during the middle of next week, with elevated
heat indices around 95-100F. Heat headlines possible.
* Becoming more unsettled late Thursday-Friday with increasing
chances for showers/storms, especially Friday with a cold
front.
Details:
Tuesday-Thursday:
Tuesday through Friday, a mid-level ridge builds over the regions.
Temperatures aloft increase with 850mb temperatures peaking at
around 20C in the Weds-Thurs timeframe. A good amount of moisture
gets transported over the ridge by Wednesday adding humidity to the
mix. Temperatures Tuesday through at least Thursday will range in
the upper 80s to mid 90s with the exception of the immediate coast.
With the the added element of higher humidity, it will feel more
like mid to near 100 Wednesday and Thursday.
Overall, there are no major disturbances embedded in the flow during
that timeframe which will reduce the threat for widespread
showers/thunderstorms. Ensemble members display potential for a few
showers. Members are still spread across the board with timing and
given the low coverage nature has been difficult to message in the
forecast. Until better agreement on timing, no major adjustment have
been made to the forecast. There will be a better signal for forcing
later Thursday with corresponding increased chances for showers and
thunderstorms.
Thursday - Friday:
A mid-level trough approaches the region, Thursday into Friday.
This will shift the pattern to becoming more unsettled with
increasing potential precipitation starting later Thursday.
Ensemble members are still across the board when it comes the
the precipitation chances and the timing leading to lower
confidence this far out. A front will eventually push through on
Friday with the main trough axis. This should bring the highest
chances of seeing precipitation.
&&
.AVIATION /07Z SUNDAY THROUGH THURSDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Rest of Tonight: High confidence.
IFR/LIFR stratus continues to builds north under light ESE flow
tonight. Patchy BR/FG.
Sunday: Moderate confidence.
IFR/LIFR Stratus and fog should burn off about the same time as
the last couple days, between 13-16z, then VFR conditions for
the rest of the day. South winds at 5-10 knots.
Sunday Night: High Confidence
IFR/LIFR CIGS build north again tonight with continued ESE flow.
stratus should have similar timing to last night.
Monday: Moderate Confidence
VFR after IFR CIGS burn off again. Chance for showers and
thunderstorms mainly across the interior
KBOS Terminal...Moderate confidence in TAF.
IFR CIGS about to overspread the terminal, and will likely last
until 14-15z similar to the last couple days. VFR this
afternoon. IFR stratus likely around the same time tonight
KBDL Terminal...High confidence in TAF.
IFR/LIFR CIGS about to overspread the terminal, and will likely
hang on until 12-13z before lifting. VFR this afternoon. Less
certain about low status again for tonight.
Outlook /Monday Night through Thursday/...
Monday Night: Mainly VFR, with local MVFR possible. Slight
chance SHRA, slight chance TSRA.
Tuesday: VFR. Slight chance SHRA, slight chance TSRA.
Tuesday Night: VFR.
Wednesday through Wednesday Night: VFR. Slight chance SHRA,
slight chance TSRA.
Thursday: VFR. Breezy. Chance SHRA, chance TSRA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
Today through Monday...High confidence.
Weak pressure gradient will keep winds/seas below Small Craft
Advisory thresholds through Sunday: seas 2-3 ft with E winds
over the southern waters and SE winds over the eastern waters up
to 15 kts during the afternoon hours, remaining light in the
overnight hours. Main concern for mariners will be areas of fog
tonight that may redevelop again tonight.
Outlook /Monday Night through Thursday/...
Monday Night through Wednesday: Winds less than 25 kt.
Wednesday Night: Winds less than 25 kt. Seas locally
approaching 5 ft.
Thursday: Winds less than 25 kt. Areas of seas approaching
5 ft. Slight chance of rain showers, slight chance of
thunderstorms.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.
&&
$$
SYNOPSIS...Mensch/KP
NEAR TERM...KP
SHORT TERM...KP
LONG TERM...Mensch
AVIATION...KP
MARINE...KP
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