Lexington Weather

Current Conditions [‒] Current Conditions [+]

42.1°F Colder than last hour.

5.6°C

Chilly

Few Clouds

This Afternoon: Hi 41 °F

Tonight: Lo 23 °F

Dew Point: 21.7°F Decreased 0.6°F since last hour.

Humidity: 44% Increased 2.0% since last hour.

Air Quality Index: 28

Good

(Ozone)

Barometer: 29.66 in Rising 0.03 inHg/hr

1004 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.05 in

Rain Monday: 1.13 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: 1 mph

Gusts: 10 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

Expected Snow [‒] Expected Snow [+]

Tap Click image to go to NWS winter weather page

Trace of snow expected in Lexington.

Forecast [‒] Forecast [+]

Daily Forecast
Hourly Forecast

NWS Weather Forecast -
This Afternoon, Tonight, & Wednesday through Monday Night

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Tue Mar 17, 2026 1:46pm EDT

This Afternoon:

Mostly Sunny

Hi 41 °F

Mostly sunny, with a high near 41. West wind around 14 mph, with gusts as high as 28 mph.

Tonight:

Mostly Clear

Lo 23 °F

Mostly clear, with a low around 23. West wind 8 to 13 mph, with gusts as high as 23 mph.

Wednesday:

Sunny

Hi 38 °F

Sunny, with a high near 38. West wind around 7 mph.

Wednesday Night:

Partly Cloudy

Lo 26 °F

Partly cloudy, with a low around 26. South wind 2 to 6 mph.

Thursday:

Mostly Sunny

Hi 45 °F

Mostly sunny, with a high near 45. South wind 2 to 8 mph.

Thursday Night:

Mostly Cloudy then Slight Chance Light Snow

Lo 31 °F

A slight chance of snow after 5am. Mostly cloudy, with a low around 31. South wind 5 to 8 mph. Chance of precipitation is 20%.

Friday:

Slight Chance Light Snow then Slight Chance Light Rain

Hi 51 °F

A slight chance of snow before 8am, then a slight chance of rain between 8am and 1pm. Mostly sunny, with a high near 51. Southwest wind around 7 mph.

Friday Night:

Partly Cloudy then Slight Chance Light Rain

Lo 35 °F

A slight chance of rain after 4am. Partly cloudy, with a low around 35. West wind around 7 mph.

Saturday:

Chance Light Rain

Hi 50 °F

A chance of rain. Partly sunny, with a high near 50. Southwest wind 6 to 12 mph. Chance of precipitation is 40%.

Saturday Night:

Chance Light Rain

Lo 35 °F

A chance of rain. Mostly cloudy, with a low around 35. Southwest wind around 10 mph. Chance of precipitation is 40%.

Sunday:

Chance Light Rain

Hi 53 °F

A chance of rain. Mostly cloudy, with a high near 53. Southwest wind around 12 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

Sunday Night:

Chance Light Rain

Lo 35 °F

A chance of rain. Mostly cloudy, with a low around 35. West wind around 10 mph. Chance of precipitation is 40%.

Monday:

Slight Chance Light Snow then Sunny

Hi 47 °F

A slight chance of rain before 7am, then a slight chance of snow between 7am and 8am. Sunny, with a high near 47. Northwest wind around 12 mph, with gusts as high as 23 mph.

Monday Night:

Mostly Clear

Lo 25 °F

Mostly clear, with a low around 25. Northwest wind 7 to 10 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 2pm through Thu 1am

Issued by:
National Weather Service Boston / Norton, MA
Updated Tue Mar 17, 2026 1:46pm EDT

2:00pm

Mostly Sunny

39°F
Dew Pt 17°F
Wind Chill: 31°F
Wind from W

W 14 mph
Precip: 0%

3:00pm

Mostly Sunny

38°F
Dew Pt 16°F
Wind Chill: 30°F
Wind from W

W 14 mph
Precip: 0%

4:00pm

Mostly Sunny

38°F
Dew Pt 15°F
Wind Chill: 30°F
Wind from W

W 14 mph
Precip: 0%

5:00pm

Mostly Sunny

38°F
Dew Pt 14°F
Wind Chill: 29°F
Wind from W

W 14 mph
Precip: 0%

6:00pm

Partly Cloudy

37°F
Dew Pt 13°F
Wind Chill: 28°F
Wind from W

W 13 mph
Precip: 0%

7:00pm

Partly Cloudy

34°F
Dew Pt 13°F
Wind Chill: 25°F
Wind from W

W 12 mph
Precip: 0%

8:00pm

Partly Cloudy

32°F
Dew Pt 13°F
Wind Chill: 23°F
Wind from W

W 10 mph
Precip: 0%

9:00pm

Mostly Clear

31°F
Dew Pt 12°F
Wind Chill: 22°F
Wind from W

W 12 mph
Precip: 0%

10:00pm

Mostly Clear

29°F
Dew Pt 11°F
Wind Chill: 19°F
Wind from W

W 12 mph
Precip: 0%

11:00pm

Mostly Clear

28°F
Dew Pt 10°F
Wind Chill: 18°F
Wind from W

W 12 mph
Precip: 0%

Wed
12:00am

Mostly Clear

27°F
Dew Pt 10°F
Wind Chill: 17°F
Wind from W

W 10 mph
Precip: 0%

Wed
1:00am

Mostly Clear

26°F
Dew Pt 9°F
Wind Chill: 16°F
Wind from W

W 10 mph
Precip: 0%

Wed
2:00am

Mostly Clear

25°F
Dew Pt 8°F
Wind Chill: 16°F
Wind from W

W 10 mph
Precip: 0%

Wed
3:00am

Mostly Clear

25°F
Dew Pt 8°F
Wind Chill: 15°F
Wind from W

W 9 mph
Precip: 0%

Wed
4:00am

Clear

25°F
Dew Pt 8°F
Wind Chill: 15°F
Wind from W

W 9 mph
Precip: 0%

Wed
5:00am

Clear

24°F
Dew Pt 8°F
Wind Chill: 14°F
Wind from W

W 8 mph
Precip: 0%

Wed
6:00am

Sunny

24°F
Dew Pt 8°F
Wind Chill: 15°F
Wind from W

W 7 mph
Precip: 0%

Wed
7:00am

Sunny

24°F
Dew Pt 8°F
Wind Chill: 15°F
Wind from W

W 7 mph
Precip: 0%

Wed
8:00am

Sunny

23°F
Dew Pt 7°F
Wind Chill: 16°F
Wind from W

W 6 mph
Precip: 0%

Wed
9:00am

Sunny

25°F
Dew Pt 6°F
Wind Chill: 18°F
Wind from W

W 6 mph
Precip: 0%

Wed
10:00am

Mostly Sunny

28°F
Dew Pt 5°F
Wind Chill: 21°F
Wind from W

W 6 mph
Precip: 0%

Wed
11:00am

Sunny

30°F
Dew Pt 5°F
Wind Chill: 24°F
Wind from W

W 6 mph
Precip: 0%

Wed
12:00pm

Mostly Sunny

32°F
Dew Pt 5°F
Wind Chill: 27°F
Wind from W

W 6 mph
Precip: 0%

Wed
1:00pm

Mostly Sunny

34°F
Dew Pt 5°F
Wind Chill: 30°F
Wind from W

W 5 mph
Precip: 0%

Wed
2:00pm

Mostly Sunny

35°F
Dew Pt 4°F
Wind Chill: 31°F
Wind from NW

NW 5 mph
Precip: 0%

Wed
3:00pm

Mostly Sunny

36°F
Dew Pt 5°F
Wind Chill: 33°F
Wind from W

W 5 mph
Precip: 0%

Wed
4:00pm

Sunny

37°F
Dew Pt 5°F
Wind Chill: 34°F
Wind from SW

SW 5 mph
Precip: 0%

Wed
5:00pm

Sunny

37°F
Dew Pt 6°F
Wind Chill: 34°F
Wind from S

S 5 mph
Precip: 0%

Wed
6:00pm

Partly Cloudy

37°F
Dew Pt 9°F
Wind Chill: 34°F
Wind from S

S 5 mph
Precip: 0%

Wed
7:00pm

Partly Cloudy

36°F
Dew Pt 12°F
Wind Chill: 31°F
Wind from SE

SE 6 mph
Precip: 0%

Wed
8:00pm

Partly Cloudy

34°F
Dew Pt 14°F
Wind Chill: 29°F
Wind from S

S 6 mph
Precip: 0%

Wed
9:00pm

Partly Cloudy

30°F
Dew Pt 16°F
Wind Chill: 25°F
Wind from S

S 6 mph
Precip: 0%

Wed
10:00pm

Partly Cloudy

29°F
Dew Pt 16°F
Wind Chill: 24°F
Wind from S

S 5 mph
Precip: 0%

Wed
11:00pm

Partly Cloudy

29°F
Dew Pt 16°F
Wind Chill: 24°F
Wind from S

S 5 mph
Precip: 0%

Thu
12:00am

Partly Cloudy

29°F
Dew Pt 16°F
Wind Chill: 24°F
Wind from S

S 5 mph
Precip: 0%

Thu
1:00am

Partly Cloudy

28°F
Dew Pt 16°F
Wind Chill: 24°F
Wind from S

S 3 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 171747
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
147 PM EDT Tue Mar 17 2026

.WHAT HAS CHANGED...
Wind headlines have expired. River Flood Warnings for Sudbury River 
at Saxonville and Wood River at Hope Valley have been cancelled. 
River Flood Warnings for Pawtuxet River at Cranston and Taunton 
River at Bridgewater remain in effect.

&&

.KEY MESSAGES...


- Gusty post-frontal westerly winds gradually diminish
  overnight. This will be followed by a period of abnormally 
  cold and dry weather.

- Temperatures gradually moderate Thursday with near-normal temperatures
  continuing through the weekend. Trending unsettled late week 
  through early next week.

&&

.DISCUSSION...
KEY MESSAGE 1...- Gusty post-frontal westerly winds gradually 
diminish overnight. This will be followed by a period of abnormally 
cold and dry weather.

Winds continue to gust between 20-30 knots this afternoon before 
gradually diminishing overnight. Post-frontal environment and 
moderate pressure gradient will continue to support gusty winds 
overnight, but we should see gusts drop below 20 mph around or 
shortly after midnight. Low-level temperatures continue to fall in 
response to cold air advection with 925 hPa temps dropping to near -
10C. This will result in widespread low temperatures in the upper 
teens/low 20s tomorrow morning.

Winds become more calm Wednesday afternoon as high pressure builds 
over southern New England. However, temperatures will remain 
much cooler than normal withs highs peaking in the low to mid 
30s. The column will be very dry, so expect plenty of sunshine. 
Cold/dry conditions carry through the end of the week.

KEY MESSAGE 2...Temperatures gradually moderate Thursday with near-
normal temperatures continuing through the weekend. Trending 
unsettled late week through early next week. 

High pressure remains in control through the end of the week with 
winds becoming southerly and beginning to advect warmer air into the 
region. 850 mb temps increase from -12C on Wednesday to -1C on 
Friday. Still have a cold pool aloft which will keep diurnal clouds 
around on Thursday mixing with the sun, and more moisture moves in 
in the low/mid levels on Friday bringing partly cloudy skies. Even 
so, highs should reach the mid 40s on Thursday and the upper 40s/low 
50s on Friday into the weekend. 

Precipitation-wise nothing high impact like we saw the next 24 hours 
is expected. That being said, the pattern does become more unsettled 
over the weekend. After a weak passing wave moves overhead Thursday 
night bringing a slight chance for some low elevation rain/high 
elevation snow showers a series of stronger waves crosses the region 
first around Saturday then again late Sunday into Monday. Moisture 
is better with the second round (PWATs near 1") but jet dynamics are 
less certain owing to significant differences amongst the global 
guidance. Regardless, flooding rains are not expected at this
time.

&&

.AVIATION /18Z TUESDAY THROUGH SUNDAY/...
Forecaster Confidence Levels...

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

Through 00Z...High Confidence

VFR. Gusty westerly winds between 20 and 30 knots.

Tonight...High Confidence

VFR. Gusty westerly winds gradually diminish with sub-20 knot gusts 
by 06Z almost everywhere. Winds become light (5-10 knots) out of the 
northwest by 12Z.

Tomorrow...High Confidence

VFR. Stead 5-10 knot northwest winds early become more 
light/variable as the day progresses.

Tomorrow Night...High Confidence.

VFR. Light winds becoming south/southeast by Thursday morning.

KBOS Terminal...High confidence. 

KBDL Terminal...High confidence. 

MVFR gradually improves to VFR this morning with SW gusts 
around 25-30 kt thru this afternoon. Occasional flurries 
possible today.

Outlook /Thursday through Sunday/...

Thursday: VFR. 

Thursday Night: Mainly VFR, with local MVFR possible. Slight
chance SN.

Friday through Friday Night: VFR. Slight chance RA.

Saturday through Sunday: VFR. Breezy. Chance RA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Rest of Today through Tomorrow Night

Gusty westerly winds offshore gradually diminish overnight. Gale 
Warning remains in effect for the coastal waters with 34+ knot wind 
gusts possible for a few more hours. Should see gale force winds 
come down after sunset. High seas, especially over the south coastal 
waters gradually subside overnight in respond to weakening winds, 
but remain elevated with 8-12 foot seas this evening becoming 4-5 
feet by early tomorrow afternoon. Should see sub-SCY criteria 
conditions across the coastal zones tomorrow afternoon and tomorrow 
night, with the exception of some of the outer south coastal zones 
where 5 foot seas may persist for an extended period of time.


Outlook /Thursday through Sunday/...

Thursday: Winds less than 25 kt. Areas of seas approaching
5 ft. 

Thursday Night through Friday: Winds less than 25 kt. Seas
locally approaching 5 ft. 

Friday Night: Winds less than 25 kt. Areas of seas approaching
5 ft. 

Saturday: Winds less than 25 kt. Seas up to 5 ft. Chance of
rain. 

Saturday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft. Chance of rain. 

Sunday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Areas of rough seas. Chance of rain. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 6 PM EDT this evening for ANZ230-
     236.
     Gale Warning until 8 PM EDT this evening for ANZ231>235-237-
     250-251-254>256.

&&

$$

DISCUSSION...BW/RM
AVIATION...BW/RM
MARINE...BW/RM

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