Lexington Weather

Current Conditions [‒] Current Conditions [+]

46.6°F Colder than last hour.

8.1°C

Chilly

Mist, Overcast

Tonight: Lo 45 °F

Sunday: Hi 55 °F

Dew Point: 43.9°F

Humidity: 90% Increased 2.0% since last hour.

Air Quality Index: 22

Good

(Fine Particles)

Barometer: 29.96 in S

1015 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Friday: 0.10 in

Visibility: 4 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 2 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Tonight, Sunday, & Sunday Night through Saturday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sat Apr 18, 2026 6:31pm EDT

Tonight:

Patchy Fog then Patchy Drizzle

Lo 45 °F

Patchy fog between 9pm and 2am, then patchy drizzle and patchy fog between 2am and 5am, then patchy drizzle and patchy fog and a slight chance of rain showers. Cloudy, with a low around 45. Southeast wind 2 to 6 mph. Chance of precipitation is 20%.

Sunday:

Patchy Fog

Hi 55 °F

Patchy fog and a slight chance of rain showers before 8am, then rain showers and patchy fog between 8am and 1pm, then patchy fog and showers and thunderstorms. Cloudy. High near 55, with temperatures falling to around 45 in the afternoon. West wind 5 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night:

Chance Rain Showers then Partly Cloudy

Lo 35 °F

A chance of rain showers before 8pm. Partly cloudy, with a low around 35. West wind 6 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

Monday:

Mostly Sunny then Slight Chance Rain Showers

Hi 51 °F

A slight chance of rain showers after 3pm. Mostly sunny, with a high near 51. West wind around 8 mph. Chance of precipitation is 20%.

Monday Night:

Slight Chance Rain Showers then Partly Cloudy

Lo 31 °F

A slight chance of rain showers before 7pm. Partly cloudy, with a low around 31. Northwest wind around 7 mph. Chance of precipitation is 20%.

Tuesday:

Sunny

Hi 51 °F

Sunny, with a high near 51. West wind around 7 mph.

Tuesday Night:

Partly Cloudy then Slight Chance Rain Showers

Lo 37 °F

A slight chance of rain showers after 2am. Partly cloudy, with a low around 37. South wind around 7 mph.

Wednesday:

Slight Chance Rain Showers

Hi 55 °F

A slight chance of rain showers before 4pm. Mostly cloudy, with a high near 55. Southwest wind around 9 mph.

Wednesday Night:

Partly Cloudy

Lo 39 °F

Partly cloudy, with a low around 39. West wind around 7 mph.

Thursday:

Mostly Sunny

Hi 62 °F

Mostly sunny, with a high near 62. Northwest wind 5 to 8 mph.

Thursday Night:

Partly Cloudy

Lo 42 °F

Partly cloudy, with a low around 42. Northwest wind around 7 mph.

Friday:

Mostly Sunny

Hi 62 °F

Mostly sunny, with a high near 62. North wind 5 to 8 mph.

Friday Night:

Slight Chance Rain Showers

Lo 42 °F

A slight chance of rain showers after 9pm. Partly cloudy, with a low around 42. Northeast wind around 7 mph.

Saturday:

Chance Rain Showers

Hi 60 °F

A chance of rain showers. Partly sunny, with a high near 60. Northeast wind 5 to 8 mph.

FULL FORECAST

NWS Hourly Forecast -
Tonight 9pm through Mon 8am

Issued by:
National Weather Service Boston / Norton, MA
Updated Sat Apr 18, 2026 6:31pm EDT

9:00pm

Patchy Fog

46°F
Dew Pt 42°F
Wind Chill: 45°F
Wind from E

E 3 mph
Precip: 2%

10:00pm

Patchy Fog

46°F
Dew Pt 42°F
Wind Chill: 45°F
Wind from E

E 3 mph
Precip: 1%

11:00pm

Patchy Fog

45°F
Dew Pt 41°F
Wind from E

E 2 mph
Precip: 1%

Sun
12:00am

Patchy Fog

45°F
Dew Pt 42°F
Wind from E

E 2 mph
Precip: 1%

Sun
1:00am

Patchy Fog

45°F
Dew Pt 42°F
Wind from SE

SE 2 mph
Precip: 2%

Sun
2:00am

Patchy Drizzle

45°F
Dew Pt 42°F
Wind from SE

SE 2 mph
Precip: 3%

Sun
3:00am

Patchy Drizzle

46°F
Dew Pt 43°F
Wind from S

S 2 mph
Precip: 6%

Sun
4:00am

Patchy Drizzle

46°F
Dew Pt 43°F
Wind Chill: 45°F
Wind from S

S 3 mph
Precip: 11%

Sun
5:00am

Patchy Drizzle

47°F
Dew Pt 44°F
Wind Chill: 46°F
Wind from S

S 3 mph
Precip: 15%

Sun
6:00am

Patchy Fog

47°F
Dew Pt 44°F
Wind Chill: 45°F
Wind from S

S 5 mph
Precip: 17%

Sun
7:00am

Patchy Fog

47°F
Dew Pt 45°F
Wind Chill: 45°F
Wind from S

S 5 mph
Precip: 23%

Sun
8:00am

Chance Rain Showers

48°F
Dew Pt 47°F
Wind Chill: 46°F
Wind from S

S 5 mph
Precip: 33%
Rain: 0.02 in

Sun
9:00am

Chance Rain Showers

49°F
Dew Pt 47°F
Wind Chill: 47°F
Wind from S

S 6 mph
Precip: 48%
Rain: 0.03 in

Sun
10:00am

Rain Showers Likely

52°F
Dew Pt 48°F
Wind from S

S 6 mph
Precip: 66%
Rain: 0.04 in

Sun
11:00am

Rain Showers

53°F
Dew Pt 50°F
Wind from SW

SW 6 mph
Precip: 76%
Rain: 0.04 in

Sun
12:00pm

Rain Showers

54°F
Dew Pt 49°F
Wind from NW

NW 8 mph
Precip: 83%
Rain: 0.05 in

Sun
1:00pm

Patchy Fog

53°F
Dew Pt 49°F
Wind from NW

NW 10 mph
Precip: 97%
Rain: 0.06 in

Sun
2:00pm

Rain Showers

53°F
Dew Pt 48°F
Wind from NW

NW 12 mph
Precip: 100%
Rain: 0.03 in

Sun
3:00pm

Rain Showers

51°F
Dew Pt 45°F
Wind from NW

NW 12 mph
Precip: 100%
Rain: 0.03 in

Sun
4:00pm

Rain Showers

47°F
Dew Pt 42°F
Wind Chill: 41°F
Wind from NW

NW 13 mph
Precip: 81%
Rain: 0.03 in

Sun
5:00pm

Rain Showers Likely

45°F
Dew Pt 40°F
Wind Chill: 39°F
Wind from NW

NW 13 mph
Precip: 58%
Rain: 0.02 in

Sun
6:00pm

Chance Rain Showers

45°F
Dew Pt 38°F
Wind Chill: 39°F
Wind from NW

NW 12 mph
Precip: 41%
Rain: 0.01 in

Sun
7:00pm

Slight Chance Rain Showers

44°F
Dew Pt 37°F
Wind Chill: 38°F
Wind from NW

NW 10 mph
Precip: 24%
Rain: 0.01 in

Sun
8:00pm

Mostly Cloudy

43°F
Dew Pt 36°F
Wind Chill: 38°F
Wind from W

W 9 mph
Precip: 7%

Sun
9:00pm

Partly Cloudy

41°F
Dew Pt 34°F
Wind Chill: 36°F
Wind from W

W 8 mph
Precip: 7%

Sun
10:00pm

Partly Cloudy

40°F
Dew Pt 33°F
Wind Chill: 35°F
Wind from W

W 8 mph
Precip: 7%

Sun
11:00pm

Mostly Clear

40°F
Dew Pt 32°F
Wind Chill: 35°F
Wind from W

W 8 mph
Precip: 7%

Mon
12:00am

Mostly Clear

39°F
Dew Pt 31°F
Wind Chill: 33°F
Wind from W

W 8 mph
Precip: 7%

Mon
1:00am

Mostly Clear

39°F
Dew Pt 31°F
Wind Chill: 34°F
Wind from W

W 7 mph
Precip: 7%

Mon
2:00am

Mostly Clear

38°F
Dew Pt 30°F
Wind Chill: 33°F
Wind from W

W 7 mph
Precip: 7%

Mon
3:00am

Mostly Clear

37°F
Dew Pt 29°F
Wind Chill: 32°F
Wind from W

W 7 mph
Precip: 5%

Mon
4:00am

Mostly Clear

36°F
Dew Pt 29°F
Wind Chill: 31°F
Wind from W

W 6 mph
Precip: 3%

Mon
5:00am

Mostly Clear

36°F
Dew Pt 29°F
Wind Chill: 31°F
Wind from W

W 6 mph
Precip: 1%

Mon
6:00am

Sunny

36°F
Dew Pt 29°F
Wind Chill: 31°F
Wind from W

W 6 mph
Precip: 2%

Mon
7:00am

Mostly Sunny

37°F
Dew Pt 30°F
Wind Chill: 32°F
Wind from W

W 6 mph
Precip: 3%

Mon
8:00am

Mostly Sunny

39°F
Dew Pt 30°F
Wind Chill: 35°F
Wind from W

W 6 mph
Precip: 3%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 182329
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
729 PM EDT Sat Apr 18 2026

.WHAT HAS CHANGED...
Splashover to minor coastal flooding possible around the midnight 
high tide cycle for eastern coastal Massachusetts. Also, the gusts 
associated with the cold front will bring marginal small craft 
conditions to the southern waters. Otherwise, forecast hasn't 
deviated from the previous discussion.

&&

.KEY MESSAGES...

- Nuisance coastal flooding, mainly splashover is possible 
  tonight around the midnight high tide cycle for east coast of 
  Massachusetts; including the island of Nantucket.

- Steady rain arrives Sunday with the passage of a cold front 
  and a period of breezy northwest winds. Turning much colder 
  Sunday night.

- Generally dry but cooler Monday morning. Increasing clouds
  andspotty rain showers possible Monday afternoon with a weak
  area of low pressure.

- Return to seasonable temperatures through Wednesday before 
  another cold front sweeps through.

&&

.DISCUSSION...
KEY MESSAGE 1...Nuisance coastal flooding, mainly splashover is
possible tonight around the midnight high tide cycle for east 
coast of Massachusetts; including the island of Nantucket.

Guidance this morning continues to point towards very minor coastal 
flooding for eastern Massachusetts and Nantucket during the 
overnight high tide cycle (around midnight). Combination of onshore 
flow and the astronomical tides could lend to splashover to minor 
coastal flooding for most vulnerable low-lying locations. And as a 
result, have opt'd to issue a Coastal Flood Statement. Please avoid 
any prone area and never drive through standing water. 

KEY MESSAGE 2...Steady rain arrives Sunday with the passage of 
a cold front and a period of breezy northwest winds. Turning 
much colder Sunday night. 

Rest of Saturday and tonight should remain dry, however, a bank of 
stratus off the coast will move onshore tonight. Low clouds and few 
areas of drizzle (mainly across eastern SNE) through Sunday morning, 
in addition to areas of locally dense fog across eastern MA. As for 
the rest of Sunday, expecting a raw and chilly day. In fact, high 
temperatures in the low to mid-50s occur during the late morning, as 
a strong cold front will move through and send temperatures falling 
shortly there after. This cold front brings widespread rain and a 
few rumbles of thunder with limited instability. Rainfall rates are 
moderate to heavy with PWATs 1.2" to 1.4" - rainfall amounts are in 
the neighborhood of 0.25" to 0.50" with lower totals along and east 
of I-95. Though, any convective showers have potential for heavier 
rainfall - cannot discredit the HREF which shows potential for 
localized values above an inch. And with much colder air advecting 
into SNE, snow showers remain possible for the highest terrain of 
western MA. Don't expect any impacts, but a light coating on 
elevated surfaces remains possible. Associated with the cold front 
is a brisk NW wind, gusts 20-30 MPH late morning and early afternoon 
will lead to overall raw and chilly feeling. Clearing Sunday night 
and easing winds, temperatures fall into the low to mid-30s, while 
the higher terrain of northern Worcester County and NW MA dip into 
the upper 20s. 

KEY MESSAGE 3...Generally dry but cooler Monday morning. 
Increasing clouds and spotty rain showers possible Monday 
afternoon with a weak area of low pressure.

A colder airmass moves over southern New England Monday in the 
wake of the cold front from Sunday. 925mb temperatures drop to 
below 0C and 850mb temperatures drop to near -10C, leading to 
cooler surface temperatures across the region... coastal regions
might reach into the low 50s, but most areas will likely remain
in the upper 40s for highs. Breezy westerly winds veering 
northwesterly early to mid morning with some gusts possible in 
the higher elevations. Winds will start to diminish as high 
pressure approaches from the west, and lows Monday night likely 
fall into the 20s for southern New England, with the exception 
being the Cape/Islands and immediate coastal regions. 

As we get into range for high-resolution guidance, confidence 
is slowly ticking up in a weak area of low pressure spinning up 
ahead of an approaching high pressure system that leads to 
increasing cloudiness and spotty rain showers across southern 
New England Monday afternoon. Exactly where these showers might 
develop remains uncertain due to the wide range in both ensemble
and deterministic model guidance. Otherwise, incoming high 
pressure should keep the region dry for much of the start of the
week before it exits heading into Wednesday. 

KEY MESSAGE 4... Return to seasonable temperatures through 
Wednesday before another cold front sweeps through.

High temperatures climb Tuesday and Wednesday before another 
cold front moves through New England later Wednesday, bringing 
chances for more rain showers. Winds return to southwesterlies, 
supporting more seasonable highs in the upper 50s/low 60s. 
Ensembles indicate a ridge building in towards the end of the 
week then a large low pressure system moving through the Great 
Lakes over the weekend. This would bring dry conditions through 
late week then a return for rain chances through the weekend.

&&

.AVIATION /00Z SUNDAY THROUGH THURSDAY/...
Forecaster Confidence Levels...

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

00z TAF Update:

Tonight: Moderate Confidence. 

IFR/LIFR CIGS with visibility rapidly deteriorating to IFR/LIFR
as fog moves in, especially across the Cape and Islands. NE 
winds veer around to SE/S 5-10 knots.

Sunday: Moderate Confidence.

IFR/LIFR through the early morning hours with areas of mist or 
drizzle. Locally dense fog possible across Cape Cod and Islands 
through mid-morning. Cold front brings widespread RA from west 
to east, 12z-15z, SW winds around 10 knots, becoming W/NW and 
increasing to 10-15 knots with gusts 20-25 knots post-frontal 
passage.

Sunday Night: High Confidence.

VFR. Diminishing wind gusts. W wind 5-10 knots. 

KBOS Terminal... Moderate Confidence in TAF. 

IFR visby quickly deteriorates to LIFR this evening. Pockets of
DZ overnight into early Sunday morning. RA arrives 14z-16z, 
LLWS ahead of the cold front too. Wind shifts to the W/NW by 
18z-20z with gusts 20-25 knots. Becoming VFR late in the day 
Sunday. 

KBDL Terminal... Moderate Confidence in TAF.

Outlook /Monday through Thursday/...

Monday: VFR. Breezy. Slight chance SHRA.

Monday Night through Tuesday: VFR. 

Tuesday Night through Wednesday: VFR. Breezy. Slight chance
SHRA.

Wednesday Night through Thursday: VFR. 

&&

.MARINE...
Forecaster Confidence Levels...

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

Tonight through Sunday Night: High Confidence.

Overnight there are areas of low clouds and fog, SE to S wind less 
than 25 knots and seas 2-4 feet. Strong cold front Sunday brings SCA 
conditions, seas 3-5 feet, and W-NW gust up to 25 knots for southern 
and eastern outer and waters south of mainland RI Sunday into early 
Monday morning. Winds shift NW and ease following this frontal 
passage late Sunday night.

Outlook /Monday through Thursday/...

Monday through Monday Night: Winds less than 25 kt. Slight
chance of rain showers. 

Tuesday: Winds less than 25 kt. 

Tuesday Night: Winds less than 25 kt. Slight chance of rain
showers. 

Wednesday: Winds less than 25 kt. Seas locally approaching
5 ft. Slight chance of rain showers. 

Wednesday Night through Thursday: Winds less than 25 kt. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 11 AM to 6 PM EDT Sunday for ANZ235-
     237.
     Small Craft Advisory from 11 AM to 11 PM EDT Sunday for 
     ANZ254>256.

&&

$$

DISCUSSION...Dooley/McMinn
AVIATION...Dooley/McMinn
MARINE...Dooley/McMinn

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