Lexington Weather

Current Conditions [‒] Current Conditions [+]

38.1°F

3.4°C

Chilly

Overcast

This Afternoon: Hi 42 °F

Tonight: Lo 32 °F

Dew Point: 22.1°F

Humidity: 52%

Air Quality Index: 35

Good

(Ozone)

Barometer: 30.20 in S

1023 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Wednesday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 2 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

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

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Thu Mar 19, 2026 1:11pm EDT

This Afternoon:

Partly Sunny

Hi 42 °F

Partly sunny, with a high near 42. South wind around 7 mph.

Tonight:

Partly Cloudy

Lo 32 °F

Partly cloudy, with a low around 32. Southwest wind around 6 mph.

Friday:

Mostly Sunny

Hi 54 °F

Mostly sunny, with a high near 54. Southwest wind 3 to 12 mph, with gusts as high as 22 mph. New rainfall amounts less than a tenth of an inch possible.

Friday Night:

Light Rain

Lo 41 °F

Rain. Mostly cloudy, with a low around 41. Southwest wind 7 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Saturday:

Chance Light Rain then Mostly Sunny

Hi 54 °F

A chance of rain before 8am. Mostly sunny, with a high near 54. Northwest wind 6 to 9 mph. Chance of precipitation is 30%.

Saturday Night:

Mostly Cloudy

Lo 36 °F

Mostly cloudy, with a low around 36. West wind around 8 mph.

Sunday:

Chance Light Rain

Hi 52 °F

A chance of rain after 8am. Mostly cloudy, with a high near 52. South wind around 8 mph. Chance of precipitation is 40%.

Sunday Night:

Light Rain Likely

Lo 38 °F

Rain likely. Mostly cloudy, with a low around 38. East wind around 8 mph. Chance of precipitation is 70%.

Monday:

Light Rain Likely

Hi 46 °F

Rain likely before 4pm. Mostly cloudy, with a high near 46. North wind around 10 mph. Chance of precipitation is 60%.

Monday Night:

Partly Cloudy

Lo 27 °F

Partly cloudy, with a low around 27. Northwest wind around 9 mph.

Tuesday:

Mostly Sunny

Hi 42 °F

Mostly sunny, with a high near 42. Northwest wind around 8 mph.

Tuesday Night:

Partly Cloudy then Slight Chance Light Snow

Lo 29 °F

A slight chance of snow after 4am. Partly cloudy, with a low around 29. Southwest wind around 7 mph.

Wednesday:

Slight Chance Light Snow then Chance Light Rain

Hi 46 °F

A slight chance of snow before 10am, then a chance of rain. Mostly sunny, with a high near 46. Southwest wind 7 to 10 mph. Chance of precipitation is 30%.

Wednesday Night:

Slight Chance Light Rain then Mostly Cloudy

Lo 27 °F

A slight chance of rain before 8pm. Mostly cloudy, with a low around 27. Northwest wind around 9 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 2pm through Sat 1am

Issued by:
National Weather Service Boston / Norton, MA
Updated Thu Mar 19, 2026 1:11pm EDT

2:00pm

Mostly Sunny

41°F
Dew Pt 18°F
Wind Chill: 36°F
Wind from S

S 7 mph
Precip: 0%

3:00pm

Partly Sunny

42°F
Dew Pt 20°F
Wind Chill: 38°F
Wind from S

S 7 mph
Precip: 1%

4:00pm

Partly Sunny

42°F
Dew Pt 21°F
Wind Chill: 38°F
Wind from S

S 7 mph
Precip: 1%

5:00pm

Mostly Cloudy

41°F
Dew Pt 22°F
Wind Chill: 36°F
Wind from S

S 7 mph
Precip: 0%

6:00pm

Mostly Cloudy

40°F
Dew Pt 24°F
Wind Chill: 37°F
Wind from S

S 6 mph
Precip: 0%

7:00pm

Partly Cloudy

40°F
Dew Pt 24°F
Wind Chill: 36°F
Wind from S

S 6 mph
Precip: 0%

8:00pm

Partly Cloudy

38°F
Dew Pt 25°F
Wind Chill: 34°F
Wind from S

S 6 mph
Precip: 0%

9:00pm

Partly Cloudy

36°F
Dew Pt 26°F
Wind Chill: 31°F
Wind from S

S 6 mph
Precip: 0%

10:00pm

Partly Cloudy

35°F
Dew Pt 26°F
Wind Chill: 30°F
Wind from S

S 6 mph
Precip: 0%

11:00pm

Partly Cloudy

35°F
Dew Pt 26°F
Wind Chill: 29°F
Wind from SW

SW 6 mph
Precip: 1%

Fri
12:00am

Partly Cloudy

35°F
Dew Pt 26°F
Wind Chill: 29°F
Wind from SW

SW 6 mph
Precip: 0%

Fri
1:00am

Partly Cloudy

35°F
Dew Pt 26°F
Wind Chill: 29°F
Wind from SW

SW 6 mph
Precip: 0%

Fri
2:00am

Partly Cloudy

35°F
Dew Pt 26°F
Wind Chill: 29°F
Wind from SW

SW 6 mph
Precip: 0%

Fri
3:00am

Partly Cloudy

34°F
Dew Pt 27°F
Wind Chill: 28°F
Wind from SW

SW 6 mph
Precip: 0%

Fri
4:00am

Mostly Clear

33°F
Dew Pt 27°F
Wind Chill: 28°F
Wind from SW

SW 6 mph
Precip: 0%

Fri
5:00am

Mostly Clear

34°F
Dew Pt 28°F
Wind Chill: 29°F
Wind from W

W 6 mph
Precip: 0%

Fri
6:00am

Sunny

33°F
Dew Pt 27°F
Wind Chill: 29°F
Wind from W

W 5 mph
Precip: 0%

Fri
7:00am

Sunny

33°F
Dew Pt 27°F
Wind Chill: 29°F
Wind from W

W 5 mph
Precip: 0%

Fri
8:00am

Sunny

34°F
Dew Pt 28°F
Wind Chill: 31°F
Wind from W

W 3 mph
Precip: 0%

Fri
9:00am

Sunny

37°F
Dew Pt 28°F
Wind Chill: 34°F
Wind from W

W 3 mph
Precip: 0%

Fri
10:00am

Mostly Sunny

40°F
Dew Pt 28°F
Wind Chill: 37°F
Wind from W

W 5 mph
Precip: 0%

Fri
11:00am

Mostly Sunny

44°F
Dew Pt 28°F
Wind Chill: 41°F
Wind from SW

SW 5 mph
Precip: 1%

Fri
12:00pm

Mostly Sunny

47°F
Dew Pt 29°F
Wind Chill: 44°F
Wind from S

S 6 mph
Precip: 2%

Fri
1:00pm

Partly Sunny

49°F
Dew Pt 30°F
Wind Chill: 46°F
Wind from S

S 7 mph
Precip: 2%

Fri
2:00pm

Partly Sunny

52°F
Dew Pt 29°F
Wind from S

S 9 mph
Precip: 6%

Fri
3:00pm

Partly Sunny

52°F
Dew Pt 31°F
Wind from S

S 10 mph
Precip: 8%

Fri
4:00pm

Partly Sunny

52°F
Dew Pt 32°F
Wind from S

S 10 mph
Precip: 11%
Rain: 0.01 in

Fri
5:00pm

Mostly Cloudy

51°F
Dew Pt 33°F
Wind from S

S 12 mph
Precip: 13%
Rain: 0.03 in

Fri
6:00pm

Chance Light Rain

50°F
Dew Pt 35°F
Wind from S

S 10 mph
Precip: 25%
Rain: 0.04 in

Fri
7:00pm

Chance Light Rain

48°F
Dew Pt 35°F
Wind Chill: 45°F
Wind from S

S 10 mph
Precip: 38%
Rain: 0.08 in

Fri
8:00pm

Chance Light Rain

47°F
Dew Pt 36°F
Wind Chill: 43°F
Wind from S

S 10 mph
Precip: 50%
Rain: 0.02 in

Fri
9:00pm

Light Rain Likely

47°F
Dew Pt 37°F
Wind Chill: 42°F
Wind from SW

SW 10 mph
Precip: 58%
Rain: 0.02 in

Fri
10:00pm

Light Rain Likely

47°F
Dew Pt 38°F
Wind Chill: 41°F
Wind from SW

SW 10 mph
Precip: 67%
Rain: 0.02 in

Fri
11:00pm

Light Rain

46°F
Dew Pt 39°F
Wind Chill: 41°F
Wind from SW

SW 10 mph
Precip: 75%
Rain: 0.02 in

Sat
12:00am

Light Rain Likely

46°F
Dew Pt 39°F
Wind Chill: 41°F
Wind from SW

SW 9 mph
Precip: 69%
Rain: 0.01 in

Sat
1:00am

Light Rain Likely

45°F
Dew Pt 40°F
Wind Chill: 40°F
Wind from SW

SW 9 mph
Precip: 63%
Rain: 0.01 in

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 191704
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
104 PM EDT Thu Mar 19 2026

.WHAT HAS CHANGED...

No significant changes were made to the forecast during this
update.

&&

.KEY MESSAGES...

- Mild and breezy conditions Friday ahead of an approaching
  frontal system. Periods of rain develop Friday night as the
  front pushes through but we're not expecting a washout at this
  time. 

- Breezy and unsettled through early next week. Another round 
  of showers Sunday night into Monday. Cooler, but still near 
  normal, temperatures expected Monday through mid-week.


&&

.DISCUSSION...
KEY MESSAGE 1...Mild and breezy conditions Friday ahead of an 
approaching frontal system. Periods of rain develop Friday night as 
the front pushes through but we're not expecting a washout at this 
time. 

Fairly strong frontal wave dives SE from Ontario later Friday 
bringing a period of breezy and rainy conditions. Breezy weather 
will be driven by a robust south westerly low level jet that 
will strengthen to 45-55 knots by the evening. Otherwise, mostly
sunny conditions should prevail at least during the morning 
hours Friday. Expect thickening mid and high level clouds Friday
afternoon as well as an increasing southwest breeze. Wind 
speeds increase around 10-15 mph and gusts in the 25 to 35 mph 
range, with the higher end of that range more confined to Cape 
Cod and the Islands which typically gusts pretty well with SW 
flow (tempered by the cooler water temps). Should be a fairly 
mild day with highs in the lower 50s in most areas and perhaps 
as high as the upper 50s in the CT and Merrimack river valleys. 
Cooler with max temps in the upper 40s over the south coast, 
Cape and Islands due to persistent SW flow over the waters. 

Increasing chance for POPs Friday evening and overnight as a broken 
band of rain and showers moves from NW to SE. This will also lead to 
decreasing SW wind gusts as the column stabilizes. As it does so, it 
will act on a modest PWAT plume increasing to around 0.75-0.8 
inches, which is really not that impressive. Kept PoPs at high 
Likely to lower Categorical, although this doesn't look to be a 
significant precip-maker, with ensemble QPF probs still indicating 
low (< 30%) probs of rainfall totals greater than 0.50". The NBM has 
about a 50-50 chance of seeing greater than 0.20 inches of rain. 
Given stable thermodynamics and only modest PWATs to work with, the 
rainfall probs seem reasonable. May have to watch for a slowing 
frontal zone though, as the orientation of the front becomes nearly 
parallel to the 500 mb height contours, which could result in 
lingering showers into early Saturday morning. 


KEY MESSAGE 2...Breezy and unsettled through early next week. 
Another round of showers Sunday night into Monday. Cooler, but still 
near normal, temperatures expected Monday through mid-week. 

We will still be dealing with a pesky front late Sunday into Monday 
as it gets hung up by a low pressure moving over the Great Lakes. 
This low pressure is anticipated to move just south of New England 
late Sunday night into Monday, finally dragging this front away from 
our region.

While there is a chance for some rainfall Sunday afternoon, we're 
thinking the majority of precipitation will be Sunday night. It's 
then a race between the precipitation leaving and colder air trying 
to overspread southern New England. At this time, there does appear 
to be a brief window where light snow is possible late Sunday night 
into Monday morning. That said, this would be mainly for areas along 
and north of Route 2 in MA, but could also impact the east slopes of 
the Berkshires and Worcester Hills. Given the brief duration of any 
snow, little to no snow accumulation is expected.

High pressure over the central Appalachians Tuesday then takes over 
our weather for a brief time, before moving offshore from the Mid 
Atlantic coast Wednesday.

Still not certain about the impacts from another cold front some 
time late Wednesday into Wednesday night. This front looks to be 
moisture-starved, so thinking mainly clouds. The next chance for 
rainfall could be Thursday as a warm front tries to pass us by. 

Above normal temperatures Sunday trend to below normal Monday and 
Tuesday. Looking like near normal temperatures should return for 
Wednesday and Thursday.

&&

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

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

18z TAF Update: 

Tonight: High confidence. 

VFR, though with lower-end VFR/borderline MVFR at BDL. S to SW
winds 5-10 kt.

Friday: High confidence. 

VFR. SW winds increase to around 10-15 kt with gusts to around
25-30 kt. Potential for low level wind shear as well. Possible
areas of MVFR after 21z with -SHRA arriving around 00z. 

KBOS Terminal...High confidence in TAF overnight through Friday
afternoon. Moderate confidence in the timing VCSH Friday
afternoon and evening. 


KBDL Terminal...High confidence in TAF.

Outlook /Friday through Tuesday/...

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

Friday Night: MVFR/IFR conditions possible. Windy with gusts up
to 30 kt. Chance RA.

Saturday through Saturday Night: VFR. 

Sunday: Mainly VFR, with local MVFR possible. Chance RA.

Sunday Night: Mainly MVFR, with local IFR possible. Breezy. RA
likely.

Monday: Mainly VFR, with local IFR possible. Breezy. Chance RA.

Monday Night: VFR. Breezy. 

Tuesday: VFR. 

&&

.MARINE...
Forecaster Confidence Levels...

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

Winds and seas will remain below marine headline thresholds 
through tonight. SE winds today around 10-15 kt to shift to S 
and then SW tonight into early Friday. Seas 4 ft or less on all 
waters. 

SCA issued for the outer waters from 00z Sat thru 00z Sun. SCA
in effect from 00z-09z Sat for Buzzards, Nantucket, and Cape Cod
Bays. While a few gale-force gusts are possible, shallow mixing
depth over the cooler marine boundary layer likely results in 
gusts in the 25-30 kt range. Areas of rain and showers likely
result in areas of reduced visibility.

Outlook /Friday through Tuesday/...

Friday: Low risk for Small Craft Advisory winds with local
gusts up to 30 kt. Seas locally approaching 5 ft. 

Friday Night: Moderate risk for Small Craft Advisory winds with
local gusts up to 30 kt. Seas up to 5 ft. Chance of rain. 

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

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

Sunday: Winds less than 25 kt. Areas of seas approaching 5 ft.
Slight chance of rain. 

Sunday Night: Winds less than 25 kt. Areas of seas approaching
5 ft. Rain likely. 

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

Monday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of rough seas. 

Tuesday: Winds less than 25 kt. Local rough seas. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.

&&

$$

DISCUSSION...Belk/FT
AVIATION...Mensch/FT
MARINE...Mensch/FT

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