Lexington Weather

Current Conditions [‒] Current Conditions [+]

27.9°F Colder than last hour.

-2.3°C

Cold

Partly cloudy

Tonight: Lo 18 °F

Tuesday: Hi 37 °F

Dew Point: 19.9°F Decreased 0.6°F since last hour.

Humidity: 72% Increased 1.0% since last hour.

Barometer: 30.08 in S

1019 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Sunday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

Tap Click image to go to NWS winter weather page

For Lexington, range of possible snowfall from 0.0 to 1.4". 0.6" expected.

Forecast [‒] Forecast [+]

Daily Forecast
Hourly Forecast

NWS Weather Forecast -
Tonight, Tuesday, & Tuesday Night through Monday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Mon Dec 2, 2024 6:16pm EST

Overview:

Mainly sunny and dry weather is expected through Tuesday, although a cold airmass will continue to yield below normal temperatures and periods of ocean effect cloudiness for the Cape and Islands. Next chance for precipitation comes Wednesday night into Thursday, as a clipper system brings rain near the coast and accumulating snowfall in the interior. An colder airmass moves in Friday and into the weekend, likely with the coldest air of the season thus far.

Tonight:

Clear

Lo 18 °F

Clear, with a low around 18. Northwest wind around 3 mph.

Tuesday:

Sunny

Hi 37 °F

Sunny. High near 37, with temperatures falling to around 31 in the afternoon. West wind 3 to 8 mph.

Tuesday Night:

Mostly Clear

Lo 20 °F

Mostly clear, with a low around 20. West wind around 6 mph.

Wednesday:

Mostly Sunny

Hi 38 °F

Mostly sunny, with a high near 38. Southwest wind around 7 mph.

Wednesday Night:

Light Snow

Lo 33 °F

Snow before 11pm, then rain between 11pm and 3am, then snow. Cloudy, with a low around 33. South wind around 7 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

Thursday:

Light Snow Likely then Slight Chance Snow Showers

Hi 42 °F

Snow likely before 7am, then rain showers likely between 7am and 4pm, then a slight chance of snow showers. Mostly cloudy, with a high near 42. Southwest wind 8 to 17 mph, with gusts as high as 33 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

Thursday Night:

Mostly Clear

Lo 25 °F

Mostly clear, with a low around 25. West wind around 16 mph, with gusts as high as 30 mph.

Friday:

Sunny

Hi 31 °F

Sunny, with a high near 31. Northwest wind around 14 mph, with gusts as high as 30 mph.

Friday Night:

Mostly Clear

Lo 18 °F

Mostly clear, with a low around 18. West wind 7 to 12 mph.

Saturday:

Mostly Sunny then Slight Chance Snow Showers

Hi 35 °F

A slight chance of snow showers after 5pm. Mostly sunny, with a high near 35. West wind around 8 mph.

Saturday Night:

Chance Snow Showers

Lo 21 °F

A chance of snow showers. Mostly cloudy, with a low around 21. West wind around 6 mph. Chance of precipitation is 30%.

Sunday:

Mostly Sunny

Hi 37 °F

Mostly sunny, with a high near 37. Northwest wind around 7 mph.

Sunday Night:

Mostly Cloudy

Lo 25 °F

Mostly cloudy, with a low around 25. West wind around 6 mph.

Monday:

Slight Chance Snow Showers then Chance Light Rain

Hi 42 °F

A slight chance of snow showers before 7am, then a slight chance of snow between 7am and 9am, then a chance of rain. Partly sunny, with a high near 42. Southwest wind around 7 mph. Chance of precipitation is 30%.

FULL FORECAST

NWS Hourly Forecast -
Tonight 11pm through Tue 10pm

Issued by:
National Weather Service Boston / Norton, MA
Updated Mon Dec 2, 2024 6:16pm EST

11:00pm

Clear

24°F
Dew Pt 18°F
Wind Chill: 20°F
Wind from NW

NW 3 mph
Precip: 1%

Tue
12:00am

Clear

24°F
Dew Pt 18°F
Wind Chill: 20°F
Wind from NW

NW 3 mph
Precip: 1%

Tue
1:00am

Clear

23°F
Dew Pt 17°F
Wind Chill: 18°F
Wind from NW

NW 3 mph
Precip: 1%

Tue
2:00am

Clear

23°F
Dew Pt 17°F
Wind Chill: 18°F
Wind from W

W 3 mph
Precip: 1%

Tue
3:00am

Clear

22°F
Dew Pt 16°F
Wind Chill: 17°F
Wind from W

W 3 mph
Precip: 1%

Tue
4:00am

Clear

21°F
Dew Pt 17°F
Wind Chill: 16°F
Wind from W

W 3 mph
Precip: 0%

Tue
5:00am

Clear

19°F
Dew Pt 16°F
Wind Chill: 14°F
Wind from W

W 3 mph
Precip: 0%

Tue
6:00am

Sunny

19°F
Dew Pt 17°F
Wind Chill: 14°F
Wind from W

W 3 mph
Precip: 0%

Tue
7:00am

Sunny

19°F
Dew Pt 18°F
Wind Chill: 14°F
Wind from W

W 3 mph
Precip: 0%

Tue
8:00am

Sunny

21°F
Dew Pt 17°F
Wind Chill: 15°F
Wind from W

W 5 mph
Precip: 0%

Tue
9:00am

Sunny

25°F
Dew Pt 17°F
Wind Chill: 18°F
Wind from W

W 6 mph
Precip: 0%

Tue
10:00am

Sunny

30°F
Dew Pt 18°F
Wind Chill: 23°F
Wind from W

W 7 mph
Precip: 0%

Tue
11:00am

Sunny

32°F
Dew Pt 18°F
Wind Chill: 26°F
Wind from W

W 7 mph
Precip: 0%

Tue
12:00pm

Sunny

33°F
Dew Pt 18°F
Wind Chill: 27°F
Wind from W

W 7 mph
Precip: 0%

Tue
1:00pm

Sunny

36°F
Dew Pt 17°F
Wind Chill: 30°F
Wind from W

W 8 mph
Precip: 0%

Tue
2:00pm

Sunny

36°F
Dew Pt 18°F
Wind Chill: 30°F
Wind from W

W 7 mph
Precip: 0%

Tue
3:00pm

Mostly Sunny

36°F
Dew Pt 18°F
Wind Chill: 30°F
Wind from W

W 7 mph
Precip: 0%

Tue
4:00pm

Mostly Sunny

33°F
Dew Pt 18°F
Wind Chill: 28°F
Wind from W

W 6 mph
Precip: 0%

Tue
5:00pm

Mostly Sunny

31°F
Dew Pt 18°F
Wind Chill: 25°F
Wind from W

W 6 mph
Precip: 0%

Tue
6:00pm

Mostly Clear

30°F
Dew Pt 18°F
Wind Chill: 24°F
Wind from W

W 6 mph
Precip: 0%

Tue
7:00pm

Mostly Clear

29°F
Dew Pt 19°F
Wind Chill: 23°F
Wind from W

W 6 mph
Precip: 0%

Tue
8:00pm

Mostly Clear

27°F
Dew Pt 19°F
Wind Chill: 22°F
Wind from W

W 5 mph
Precip: 0%

Tue
9:00pm

Mostly Clear

26°F
Dew Pt 20°F
Wind Chill: 20°F
Wind from W

W 5 mph
Precip: 0%

Tue
10:00pm

Mostly Clear

26°F
Dew Pt 20°F
Wind Chill: 20°F
Wind from W

W 5 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 022315
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
615 PM EST Mon Dec 2 2024

.SYNOPSIS...
Mainly sunny and dry weather is expected through Tuesday, 
although a cold airmass will continue to yield below normal 
temperatures and periods of ocean effect cloudiness for the 
Cape and Islands. Next chance for precipitation comes Wednesday
night into Thursday, as a clipper system brings rain near the 
coast and accumulating snowfall in the interior. An colder 
airmass moves in Friday and into the weekend, likely with the 
coldest air of the season thus far.

&&

.NEAR TERM /UNTIL 6 AM TUESDAY MORNING/...
615 PM Update:

Sct-bkn strato-cu lingering across portions of SNE but these
clouds are expected to clear tonight. Otherwise, ocean effect
strato-cu developing over the ocean north of Cape Cod and these
clouds expected to fill in across the outer Cape and Nantucket 
through the night. Otherwise, a mainly clear night with light
WNW winds becoming near calm overnight. This means another very
chilly night is in store with strong radiational cooling 
expected. With little change in thermal airmass, largely used 
persistence as a basis for tonight's lows. The lone exception is
across the Mid-Cape and Outer Cape where an increasing coverage
of ocean effect stratocumulus and modest NW breeze should limit
radiational cooling and bring lows closer to the mid/upper 20s.
The larger metro cities should stay in the lower 20s but most 
areas elsewhere should dip into the teens.

&&

.SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/...
120 PM Update:

Little change in the governing synoptic regime for Tues, with 
high pressure to our south supplying continued dry weather and a
light westerly wind. The shift in the winds to more of a 
westerly flow, a less favorable direction for ocean effect over 
land, should in turn shut off ocean effect cloudiness over the 
Outer Cape early in the day. Thus mostly clear skies but still a
rather chilly and dry day with highs in the 30s, but may 
struggle to reach the freezing mark over the higher terrain of 
the Berkshires and hills in Worcester and Tolland Counties. 

For Tues night, modest change takes place with 500 mb longwave 
trough axis and associated 925-850 mb thermal trough moving
eastward and offshore. Although we still expect clear skies and 
light winds favoring efficient radiational cooling, we will see 
more in the way of lower- tropospheric warm advection. Still 
ends up being another rather cold night, and though it may not 
necessarily feel much different, lows should be a couple degrees
warmer in the upper teens to the mid 20s.

&&

.LONG TERM /WEDNESDAY THROUGH MONDAY/...
Key Messages...

* Accumulating snowfall likely Wed night into early Thu,
  especially west of I-495 with mainly rain in the coastal 
  plain.

* Turning colder Thu night into the weekend with temps well below 
  normal

* Strong wind gusts developing Wed night Cape/Islands and late Thu 
  into Fri rest of SNE


Wednesday...

Surface ridging moves across SNE then to the east by days end ahead 
of next approaching system from the Gt Lakes. Plenty of sunshine to 
start the day, then developing warm advection pattern within SW flow 
will bring increasing clouds in the afternoon. However, it should 
remain dry through the day with precip holding off until evening. 
Highs will range from the mid 30s to lower 40s with increasing SW 
winds 10-20 mph in the afternoon. 

Wednesday night into Thursday...

Deep upper level low dives into the Gt Lakes Wed night before moving 
across New Eng on Thu. Diffluent flow aloft Wed night ahead of the 
trough with favorable left exit region of the upper jet will provide 
strong large scale forcing for ascent. Decent SW low level jet will 
bring increasing moisture with saturated column developing through a 
deep layer. This will bring a period of widespread precip Wed night 
into early Thu with expected QPF amounts of 0.25 to 0.50". The 
column is cold enough for snow in the interior west of I-95 with 
mostly rain along and SE of I-95, although a rain-snow mix is 
possible along the I-95 corridor. Highest snow amounts will be over 
higher elevations where temps will be coldest. Preliminary forecast 
accums of 3-6 inches is possible over the Berkshires and Worcester 
Hills, with 1-3 inches across the rest of the interior. This is line 
with ECWMF and GEFS ensembles showing high probs (60-90%) of 3+ 
inches over the elevated terrain, with high probs (90%+) of 1 inch 
across the interior. No snow accums are expected near the coast. 
Fortunately, the bulk of the snow will begin after the Wed evening 
commute although the morning commute will be impacted. 

Best moisture will be lifting out Thu morning so interior snow will 
begin to taper off, although scattered rain and higher elevation 
snow showers likely to continue as the upper low and arctic front 
moves into the region. Clearing Thu night and windy and colder with 
lows dropping into the upper teens to mid 20s. 

Decent SW low level jet developing Wed night will likely bring a 
period of strong wind gusts across the Cape/Islands. Model soundings 
suggest potential for a period of 40-50 mph gusts here and wind 
advisories may eventually be needed. Then strong W wind gusts will 
develop across rest of SNE late Thu and especially Thu night in the 
cold advection with marginal wind advisory criteria possible. 

Friday through Monday...

Blustery and cold Fri as 850 mb temps bottoming out near -14C. Highs 
will range from the upper 20s to mid 30s and the cold conditions 
will continue into Sat but with less wind. Another fast moving 
northern stream shortwave and clipper may bring some light snow 
sometime Sat or Sat night but low confidence on timing. Drying out 
Sunday, then next system approaches next Monday with rain or a mix 
as milder air will be moving in as southerly flow develops.

&&

.AVIATION /23Z MONDAY THROUGH SATURDAY/...
Forecast Confidence Levels:

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

00z TAF Update: 

Through Tuesday Night: High confidence. 

VFR through the period. WNW winds will trend light/calm 
overnight for most areas except 5-8 kt for BOS and the Cape 
airports. For Tuesday, winds become more WNW to W, then become 
light W to WSW for Tuesday night. 

KBOS Terminal...High confidence in TAF. WNW winds under 10 kt
becoming around 5-8 kt tonight. W winds for Tue around 5-8 kt
before becoming light W/WSW Tue night.

KBDL Terminal...High confidence in TAF. WNW winds around 5-8 kt
through the afternoon, trending light/variable overnight. Light
W winds for Tue then becoming WSW Tue night.

Outlook /Wednesday through Saturday/...

Wednesday: VFR. Breezy. 

Wednesday Night: MVFR/IFR conditions possible. Windy with gusts
up to 35 kt. SN, RA.

Thursday: Mainly MVFR, with local IFR possible. Windy with
gusts up to 35 kt. Chance SHRA, chance SHSN.

Thursday Night: VFR. Windy with gusts up to 35 kt. 

Friday: VFR. Windy with gusts up to 30 kt. 

Friday Night: VFR. Breezy. 

Saturday: VFR. Breezy. Slight chance SHSN.

&&

.MARINE...
Forecaster Confidence Levels:

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

Generally tranquil winds and sea conditions for boaters through
Tuesday night. WNW to W winds around 10-15 kt thru Tue, then
becoming W/WSW around 15 kt for Tue night. Seas thru Tue night 3
ft or less all waters. Dry weather is expected, although ocean 
effect cloudiness over the eastern waters could produce a 
sprinkle or flurry over the outer waters.

Outlook /Wednesday through Saturday/...

Wednesday: Winds less than 25 kt. Slight chance of rain. 

Wednesday Night: Low risk for gale force winds with gusts up to
35 kt. Areas of rough seas. Rain. 

Thursday: Moderate risk for gale force winds with gusts up to
40 kt. Rough seas up to 14 ft. Rain showers. 

Thursday Night: gale force winds with gusts up to 40 kt. Rough
seas up to 14 ft. Slight chance of rain showers. 

Friday: Strong winds with gusts up to 35 kt. Rough seas up to
11 ft. 

Friday Night: Moderate risk for Small Craft Advisory winds with
gusts up to 30 kt. Areas of rough seas. 

Saturday: Winds less than 25 kt. Areas of seas approaching
5 ft. Slight chance of rain showers, slight chance of snow
showers.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Gale Watch from Wednesday evening through Thursday evening for 
     ANZ232>235-237-255-256.

&&

$$

SYNOPSIS...KJC/Loconto
NEAR TERM...KJC/Loconto
SHORT TERM...Loconto
LONG TERM...KJC
AVIATION...KJC/Loconto
MARINE...KJC/Loconto

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