Lexington Weather

Current Conditions [‒] Current Conditions [+]

57.0°F Colder than last hour.

13.9°C

Cool

Clear

Overnight: Lo 46 °F

Saturday: Hi 66 °F

Dew Point: 46.2°F Decreased 1.3°F since last hour.

Humidity: 67% Decreased 1.0% since last hour.

Air Quality Index: 26

Good

(Ozone)

Barometer: 30.10 in S

1019 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Friday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Overnight, Saturday, & Saturday Night through Friday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sat Sep 19, 2026 2:36am EDT

Overview:

- Dry with fall-like weather tonight through Sat night. Lows both nights mainly in the 40s-lower 50s. Highs Sat mainly in the 60s perhaps flirting with 70 in the lower CT River Valley.

- Next chance for rain Sunday into Monday. There remains uncertainty in the details such as coverage, timing, and amounts. Showers may linger through early next week. A coastal low pressure is possible late next week.

Overnight:

Partly Cloudy

Lo 46 °F

Partly cloudy, with a low around 46. North wind around 5 mph.

Saturday:

Mostly Sunny

Hi 66 °F

Mostly sunny, with a high near 66. Northeast wind around 5 mph.

Saturday Night:

Partly Cloudy

Lo 47 °F

Partly cloudy, with a low around 47. South wind 1 to 5 mph.

Sunday:

Mostly Cloudy then Rain Showers

Hi 63 °F

Rain showers between 1pm and 4pm, then rain showers and patchy fog. Mostly cloudy, with a high near 63. Southeast wind 2 to 6 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.

Sunday Night:

Rain Showers

Lo 51 °F

Rain showers before 7pm, then rain showers and patchy fog. Cloudy, with a low around 51. Northeast wind 5 to 8 mph. Chance of precipitation is 80%.

Monday:

Partly Sunny

Hi 65 °F

Partly sunny, with a high near 65. Northeast wind 6 to 9 mph.

Monday Night:

Mostly Cloudy

Lo 48 °F

Mostly cloudy, with a low around 48. Northeast wind 2 to 7 mph.

Tuesday:

Partly Sunny

Hi 61 °F

Partly sunny, with a high near 61. Northeast wind around 9 mph.

Tuesday Night:

Mostly Cloudy

Lo 47 °F

Mostly cloudy, with a low around 47. Northeast wind 5 to 8 mph.

Wednesday:

Partly Sunny

Hi 62 °F

Partly sunny, with a high near 62. Northeast wind 8 to 14 mph, with gusts as high as 29 mph.

Wednesday Night:

Mostly Cloudy then Slight Chance Rain Showers

Lo 47 °F

A slight chance of rain showers after 4am. Mostly cloudy, with a low around 47. Northeast wind 6 to 10 mph.

Thursday:

Chance Rain Showers

Hi 61 °F

A chance of rain showers. Mostly cloudy, with a high near 61. Northeast wind 9 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.

Thursday Night:

Chance Rain Showers

Lo 48 °F

A chance of rain showers. Mostly cloudy, with a low around 48. Northeast wind 10 to 14 mph. Chance of precipitation is 40%.

Friday:

Chance Rain Showers

Hi 62 °F

A chance of rain showers. Partly sunny, with a high near 62. North wind around 14 mph, with gusts as high as 30 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 3am through Sun 2pm

Issued by:
National Weather Service Boston / Norton, MA
Updated Sat Sep 19, 2026 2:36am EDT

3:00am

Partly Cloudy

51°F
Dew Pt 43°F
Wind from N

N 5 mph
Precip: 0%

4:00am

Partly Cloudy

50°F
Dew Pt 43°F
Wind Chill: 48°F
Wind from N

N 5 mph
Precip: 0%

5:00am

Partly Cloudy

48°F
Dew Pt 42°F
Wind Chill: 46°F
Wind from N

N 5 mph
Precip: 0%

6:00am

Sunny

46°F
Dew Pt 42°F
Wind Chill: 44°F
Wind from N

N 5 mph
Precip: 0%

7:00am

Sunny

46°F
Dew Pt 41°F
Wind Chill: 44°F
Wind from N

N 5 mph
Precip: 0%

8:00am

Sunny

49°F
Dew Pt 42°F
Wind Chill: 47°F
Wind from N

N 5 mph
Precip: 0%

9:00am

Sunny

52°F
Dew Pt 42°F
Wind from N

N 5 mph
Precip: 0%

10:00am

Sunny

56°F
Dew Pt 42°F
Wind from NE

NE 5 mph
Precip: 0%

11:00am

Sunny

60°F
Dew Pt 41°F
Wind from NE

NE 5 mph
Precip: 0%

12:00pm

Mostly Sunny

61°F
Dew Pt 41°F
Wind from NE

NE 5 mph
Precip: 0%

1:00pm

Mostly Sunny

64°F
Dew Pt 41°F
Wind from NE

NE 3 mph
Precip: 0%

2:00pm

Mostly Sunny

65°F
Dew Pt 41°F
Wind from E

E 3 mph
Precip: 0%

3:00pm

Mostly Sunny

65°F
Dew Pt 42°F
Wind from E

E 3 mph
Precip: 0%

4:00pm

Mostly Sunny

64°F
Dew Pt 43°F
Wind from SE

SE 5 mph
Precip: 0%

5:00pm

Sunny

63°F
Dew Pt 43°F
Wind from SE

SE 5 mph
Precip: 0%

6:00pm

Mostly Clear

61°F
Dew Pt 44°F
Wind from SE

SE 5 mph
Precip: 0%

7:00pm

Mostly Clear

58°F
Dew Pt 44°F
Wind from SE

SE 5 mph
Precip: 0%

8:00pm

Mostly Clear

55°F
Dew Pt 44°F
Wind from SE

SE 5 mph
Precip: 0%

9:00pm

Partly Cloudy

53°F
Dew Pt 44°F
Wind from SE

SE 3 mph
Precip: 0%

10:00pm

Partly Cloudy

52°F
Dew Pt 44°F
Wind from S

S 3 mph
Precip: 0%

11:00pm

Partly Cloudy

51°F
Dew Pt 44°F
Wind from S

S 3 mph
Precip: 0%

Sun
12:00am

Partly Cloudy

50°F
Dew Pt 44°F
Wind from S

S 2 mph
Precip: 0%

Sun
1:00am

Partly Cloudy

49°F
Dew Pt 44°F
Wind from S

S 2 mph
Precip: 0%

Sun
2:00am

Mostly Cloudy

49°F
Dew Pt 44°F
Wind from S

S 2 mph
Precip: 0%

Sun
3:00am

Partly Cloudy

49°F
Dew Pt 44°F
Wind from SW

SW 2 mph
Precip: 0%

Sun
4:00am

Mostly Cloudy

49°F
Dew Pt 44°F
Wind from S

S 1 mph
Precip: 0%

Sun
5:00am

Partly Cloudy

49°F
Dew Pt 44°F
Wind from S

S 1 mph
Precip: 0%

Sun
6:00am

Partly Sunny

49°F
Dew Pt 45°F
Wind from SE

SE 2 mph
Precip: 0%

Sun
7:00am

Mostly Cloudy

50°F
Dew Pt 46°F
Wind from SE

SE 2 mph
Precip: 0%

Sun
8:00am

Mostly Cloudy

51°F
Dew Pt 47°F
Wind from SE

SE 3 mph
Precip: 5%

Sun
9:00am

Mostly Cloudy

54°F
Dew Pt 48°F
Wind from SE

SE 3 mph
Precip: 6%

Sun
10:00am

Mostly Cloudy

57°F
Dew Pt 49°F
Wind from SE

SE 5 mph
Precip: 6%

Sun
11:00am

Mostly Cloudy

60°F
Dew Pt 50°F
Wind from SE

SE 6 mph
Precip: 7%

Sun
12:00pm

Mostly Cloudy

61°F
Dew Pt 51°F
Wind from SE

SE 6 mph
Precip: 28%

Sun
1:00pm

Slight Chance Rain Showers

61°F
Dew Pt 52°F
Wind from SE

SE 6 mph
Precip: 49%

Sun
2:00pm

Rain Showers Likely

60°F
Dew Pt 53°F
Wind from SE

SE 6 mph
Precip: 70%
Rain: 0.04 in

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 190559
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
159 AM EDT Sat Sep 19 2026

.WHAT HAS CHANGED...
Small craft headlines issued for many of our waters tonight into 
Saturday morning.

&&

.KEY MESSAGES...

- Dry with fall-like weather tonight through Sat night. Lows 
  both nights mainly in the 40s-lower 50s. Highs Sat mainly in 
  the 60s perhaps flirting with 70 in the lower CT River Valley.

- Next chance for rain Sunday into Monday. There remains
  uncertainty in the details such as coverage, timing, and
  amounts. Showers may linger through early next week. A coastal
  low pressure is possible late next week.

&&

.DISCUSSION...
KEY MESSAGE 1...Dry with fall-like weather tonight through Sat 
night. Lows both nights mainly in the 40s-lower 50s. Highs Sat 
mainly in the 60s perhaps flirting with 70 in the lower CT River 
Valley.

A very pleasant fall-like airmass is on tap for the region tonight 
through Sat night. This as high pressure builds eastward across 
Quebec tonight and into northern New England/Canadian Maritimes Sat 
into Sat night.

Drier and cooler air works into the region tonight. Winds should 
decouple enough overnight for lows to drop into the 40s across many 
locations...but lower-middle 50s in some urban centers as well as 
the Cape/Islands where a stiff N breeze will keep temps from 
bottoming out. Plenty of sunshine on Sat...but cool NE flow will 
result in highs mainly in the 60s perhaps flirting with 70 in parts 
of the Lower CT River Valley. Coolest high temps Sat will be found 
along the immediate eastern MA coast, Cape and Islands where highs 
will be held in the lower to middle 60s. 

High pressure slowly shifts east of the region Sat night. 
However...think there will be enough of a window for a good night of 
radiational cooling before thicker mid-level clouds move in toward 
daybreak. Low temps should be well down into the 40s in most 
locations with lower 50s in the urban heat island of Boston. 

KEY MESSAGE 2...Next chance for rain Sunday into Monday. There
remains uncertainty in the details such as coverage, timing, and 
amounts. Showers may linger through early next week. A coastal 
low pressure is possible late next week.

The latest guidance still suggests a widespread rainfall later
Sunday into Monday morning. This is not looking like it will be
an especially dynamic system. Still a wetting rain should
overspread southern New England from west to east during the
day. The most likely period for sustained rainfall should be
Sunday night. Then the question becomes how quickly a front
pushes south of our region Monday morning.

Right now, favoring dry weather for most of Monday, continuing
through Wednesday. Some of the deterministic models suggest a
slightly farther north position of this front, keeping a small
chance for continuing precipitation towards the south coast.
Given the strength of the high pressure over eastern Canada,
have gone away from this particular solution.

Finally, the guidance suite is hinting at a possible coastal low
pressure some time Thursday into Friday. However, there are
rather large variances in track and timing. For example, the 12Z
GFS has a low pressure over the Gulf of Maine at 8 AM next
Friday. Meanwhile, the 12Z ECMWF has this same low pressure
about 300 miles east of southern MD for this same time.
Different positions also lead to different tracks due to
interactions with a mid level trough. At this time, have low
confidence in the forecast details late next week. It is a
situation that will need to be monitored.

&&

.AVIATION /06Z SATURDAY THROUGH WEDNESDAY/...
Forecaster Confidence Levels...

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

06Z TAF Update: 

Through 12Z...High confidence.

VFR. N/NNE winds 5-10 kts for the interiors. Slightly stronger
winds for coastal areas, more likely Cape/Islands with speeds
10-15 kts and an occasional gust up to 20 kts. 

Today...High confidence.

VFR. Light NE winds becoming E/ESE in the afternoon, except for
a few 20 kt gusts in the morning across the Cape and Islands.

Saturday night...High confidence. 

VFR. Winds shift to the S in the evening less than 10 kts. 

KBOS Terminal...High confidence in TAF.

KBDL Terminal...High confidence in TAF.

Outlook /Sunday through Wednesday/...

Sunday: Mainly VFR, with local IFR possible. SHRA, patchy BR.

Sunday Night: MVFR/IFR conditions possible. Breezy. SHRA.

Monday: Mainly VFR, with local MVFR possible. Breezy. Slight
chance SHRA.

Monday Night: VFR. Breezy. 

Tuesday: VFR. Windy with local gusts up to 30 kt. 

Tuesday Night: VFR. Windy with areas of gusts up to 35 kt. 

Wednesday: Mainly VFR, with local IFR possible. Windy with
gusts up to 35 kt. 

&&

.MARINE...
Forecaster Confidence Levels...

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

Tonight through Saturday night...High confidence.

As high pressure builds into Quebec tonight, expect a period of
N wind gusts near 25 knots across many of our waters given good
mixing in the cool air advection pattern over the relatively 
mild ocean. We did include Cape Cod Bay/Nantucket sound as they 
should see a period of good mixing with 925T dropping to between
+5C and +7C and SST still on the order of +21C/+22C.

Outlook /Sunday through Wednesday/...

Sunday: Winds less than 25 kt. Chance of rain showers. 

Sunday Night: Winds less than 25 kt. Rain showers. Local
visibility 1 to 3 nm.

Monday: Low risk for Small Craft Advisory winds with gusts up
to 30 kt. Seas locally approaching 5 ft. Chance of rain
showers, slight chance of thunderstorms. 

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

Tuesday: Strong winds with gusts up to 35 kt. Rough seas up to
11 ft. Slight chance of rain showers. 

Tuesday Night: Strong winds with gusts up to 40 kt. Rough seas
up to 12 ft. Slight chance of rain showers. 

Wednesday: Strong winds with gusts up to 45 kt. Rough seas up
to 13 ft. Slight chance of rain showers. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...High Risk for Rip Currents from 8 AM EDT this morning through this 
     evening for MAZ007-015-016-019-022-024.
RI...None.
MARINE...Small Craft Advisory until noon EDT today for ANZ231-232-250-
     251-254>256.

&&

$$

DISCUSSION...Belk/Frank
AVIATION...Mensch
MARINE...Belk/Frank

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