Lexington Weather

Current Conditions [‒] Current Conditions [+]

65.7°F Warmer than last hour.

18.7°C

Muggy

Partly cloudy

Today: Hi 76 °F

Tonight: Lo 49 °F

Dew Point: 64.2°F Increased 0.3°F since last hour .

Humidity: 95%

Air Quality Index: 25

Good

(Ozone)

Barometer: 29.98 in Rising 0.02 inHg/hr

1015 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Thursday: 0.04 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Today, Tonight, & Saturday through Thursday Night

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Fri Sep 18, 2026 7:02am EDT

Overview:

- Any lingering showers exit the Cape and Islands by late morning, giving way to a dry afternoon and evening. Fall-like temperatures expected Saturday with dry conditions.

- 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.

Today:

Sunny

Hi 76 °F

Sunny, with a high near 76. Northwest wind 3 to 9 mph.

Tonight:

Mostly Clear

Lo 49 °F

Mostly clear, with a low around 49. North wind 5 to 9 mph.

Saturday:

Sunny

Hi 64 °F

Sunny, with a high near 64. Northeast wind around 6 mph.

Saturday Night:

Partly Cloudy

Lo 48 °F

Partly cloudy, with a low around 48. Southeast wind 2 to 6 mph.

Sunday:

Rain Showers Likely

Hi 65 °F

Rain showers likely after 11am. Mostly cloudy, with a high near 65. Southeast wind 2 to 6 mph. Chance of precipitation is 60%.

Sunday Night:

Rain Showers Likely

Lo 54 °F

Rain showers likely before 9pm, then rain showers likely and patchy fog. Mostly cloudy, with a low around 54. Northeast wind around 5 mph. Chance of precipitation is 70%.

Monday:

Chance Rain Showers

Hi 65 °F

A chance of rain showers. Partly sunny, with a high near 65. Northeast wind around 8 mph. Chance of precipitation is 30%.

Monday Night:

Chance Rain Showers

Lo 51 °F

A chance of rain showers. Mostly cloudy, with a low around 51. Northeast wind 3 to 8 mph. Chance of precipitation is 30%.

Tuesday:

Chance Rain Showers

Hi 60 °F

A chance of rain showers. Mostly cloudy, with a high near 60. Northeast wind 8 to 12 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

Tuesday Night:

Chance Rain Showers then Mostly Cloudy

Lo 50 °F

A chance of rain showers before 10pm. Mostly cloudy, with a low around 50. Northeast wind 7 to 10 mph. Chance of precipitation is 30%.

Wednesday:

Partly Sunny then Slight Chance Rain Showers

Hi 61 °F

A slight chance of rain showers after 5pm. Partly sunny, with a high near 61. Northeast wind 10 to 14 mph, with gusts as high as 29 mph.

Wednesday Night:

Slight Chance Rain Showers

Lo 49 °F

A slight chance of rain showers. Mostly cloudy, with a low around 49. Northeast wind 7 to 12 mph, with gusts as high as 22 mph.

Thursday:

Chance Rain Showers

Hi 62 °F

A chance of rain showers. Partly sunny, with a high near 62. Northeast wind around 12 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

Thursday Night:

Chance Rain Showers

Lo 50 °F

A chance of rain showers. Mostly cloudy, with a low around 50. Northeast wind around 9 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 8am through Sat 7pm

Issued by:
National Weather Service Boston / Norton, MA
Updated Fri Sep 18, 2026 7:02am EDT

8:00am

Sunny

67°F
Dew Pt 65°F
Wind from NW

NW 6 mph
Precip: 2%

9:00am

Sunny

69°F
Dew Pt 65°F
Wind from NW

NW 7 mph
Precip: 1%

10:00am

Sunny

71°F
Dew Pt 63°F
Wind from NW

NW 8 mph
Precip: 1%

11:00am

Sunny

72°F
Dew Pt 61°F
Wind from N

N 8 mph
Precip: 0%

12:00pm

Sunny

74°F
Dew Pt 60°F
Wind from NW

NW 8 mph
Precip: 0%

1:00pm

Sunny

75°F
Dew Pt 59°F
Wind from NW

NW 8 mph
Precip: 0%

2:00pm

Sunny

76°F
Dew Pt 58°F
Wind from NW

NW 8 mph
Precip: 0%

3:00pm

Sunny

76°F
Dew Pt 57°F
Wind from NW

NW 9 mph
Precip: 0%

4:00pm

Sunny

76°F
Dew Pt 57°F
Wind from NW

NW 9 mph
Precip: 0%

5:00pm

Sunny

74°F
Dew Pt 55°F
Wind from NW

NW 9 mph
Precip: 0%

6:00pm

Mostly Clear

72°F
Dew Pt 53°F
Wind from NW

NW 9 mph
Precip: 0%

7:00pm

Mostly Clear

69°F
Dew Pt 51°F
Wind from N

N 8 mph
Precip: 0%

8:00pm

Mostly Clear

67°F
Dew Pt 48°F
Wind from N

N 8 mph
Precip: 0%

9:00pm

Mostly Clear

64°F
Dew Pt 47°F
Wind from N

N 8 mph
Precip: 0%

10:00pm

Mostly Clear

62°F
Dew Pt 46°F
Wind from N

N 7 mph
Precip: 0%

11:00pm

Partly Cloudy

60°F
Dew Pt 44°F
Wind from N

N 7 mph
Precip: 0%

Sat
12:00am

Partly Cloudy

58°F
Dew Pt 44°F
Wind from N

N 6 mph
Precip: 0%

Sat
1:00am

Partly Cloudy

56°F
Dew Pt 43°F
Wind from N

N 6 mph
Precip: 0%

Sat
2:00am

Partly Cloudy

54°F
Dew Pt 43°F
Wind from N

N 5 mph
Precip: 0%

Sat
3:00am

Partly Cloudy

53°F
Dew Pt 43°F
Wind from N

N 5 mph
Precip: 0%

Sat
4:00am

Partly Cloudy

51°F
Dew Pt 42°F
Wind from N

N 5 mph
Precip: 0%

Sat
5:00am

Partly Cloudy

50°F
Dew Pt 42°F
Wind Chill: 48°F
Wind from N

N 5 mph
Precip: 0%

Sat
6:00am

Mostly Sunny

49°F
Dew Pt 41°F
Wind Chill: 47°F
Wind from N

N 5 mph
Precip: 0%

Sat
7:00am

Sunny

49°F
Dew Pt 41°F
Wind Chill: 47°F
Wind from N

N 6 mph
Precip: 0%

Sat
8:00am

Sunny

51°F
Dew Pt 42°F
Wind from N

N 6 mph
Precip: 0%

Sat
9:00am

Sunny

55°F
Dew Pt 42°F
Wind from N

N 6 mph
Precip: 0%

Sat
10:00am

Sunny

57°F
Dew Pt 41°F
Wind from NE

NE 6 mph
Precip: 0%

Sat
11:00am

Sunny

60°F
Dew Pt 40°F
Wind from NE

NE 6 mph
Precip: 0%

Sat
12:00pm

Sunny

61°F
Dew Pt 40°F
Wind from NE

NE 5 mph
Precip: 0%

Sat
1:00pm

Sunny

63°F
Dew Pt 41°F
Wind from E

E 5 mph
Precip: 0%

Sat
2:00pm

Sunny

64°F
Dew Pt 41°F
Wind from E

E 3 mph
Precip: 0%

Sat
3:00pm

Sunny

64°F
Dew Pt 42°F
Wind from E

E 5 mph
Precip: 0%

Sat
4:00pm

Sunny

63°F
Dew Pt 43°F
Wind from E

E 5 mph
Precip: 0%

Sat
5:00pm

Sunny

62°F
Dew Pt 44°F
Wind from E

E 6 mph
Precip: 0%

Sat
6:00pm

Mostly Clear

60°F
Dew Pt 44°F
Wind from SE

SE 6 mph
Precip: 0%

Sat
7:00pm

Mostly Clear

58°F
Dew Pt 44°F
Wind from SE

SE 6 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 181122
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
722 AM EDT Fri Sep 18 2026

.WHAT HAS CHANGED...
Rip Statement issued for east facing beaches of MA for Saturday
due to increased risk for rip currents.

&&

.KEY MESSAGES...

- Any lingering showers exit the Cape and Islands by late
  morning, giving way to a dry afternoon and evening. Fall-like
  temperatures expected Saturday with dry conditions. 

- 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.

&&

.DISCUSSION...
KEY MESSAGE 1...Any lingering showers exit the Cape and Islands by late
morning, giving way to a dry afternoon and evening. Fall-like 
temperatures expected Saturday with dry conditions. 

The remaining batch of showers continues to push east early this 
morning. Any remaining showers will likely exit the Cape and Islands 
by late morning. Behind the showers, a cold front moves across the 
region early this morning shifting winds to the NW. High pressure 
will settle across the region for today with subsident flow 
supporting dry conditions and clearing skies. NW winds with some 
gusts to 20 and up to 25 mph for the Cape/Islands. Cooler air begins 
to advect in from the north in the mid-levels later today, but 
likely won't have much impact on the high temperatures. Temperatures 
are likely to be in seasonable ranges in the 70s for most areas. 
Only exceptions may be upper 60s for the outer Cape and Nantucket 
where there is northerly onshore flow.

A cooler airmass pushes into the region later Friday into Saturday. 
Clear skies will optimize radiational cooling as well to make for a 
cool night. Temperatures likely fall into the upper 40s to low 50s 
for much of the region. Higher elevations, especially the northern 
Worcester Hills will lean cooler in the low 40s. Cooler airmass 
stays in place for Saturday with 850mb temperatures 6-9C. This will 
support Fall-like temperatures in the mid 60s for most. 
East/northeast flow along the eastern coastline may keep those 
immediate coastal areas cooler in the low 60s. Surface high pressure 
continues to dominate bringing dry conditions. 

Not exactly ideal beach weather with the cooler temperatures; 
however, there is an increased risk for rip currents for the east-
facing beaches. There will be an extended period of enhanced NNE 
winds tonight into Saturday which will help establish a swell with 
slightly longer wave periods. 


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. 

The main surface high exits offshore Saturday night into early 
Sunday as the next system approaches from the west with our next 
chance of precipitation Sunday into Monday. The ingredients are 
generally in place for at at least a soaking rainfall across 
southern New England. A shortwave approaches from the northwest 
coupled with an 850mb jet positioning over southern New England. 
This provide ample moisture advecting and synoptic scale lift for 
precipitation. PWATS increase to 1.0-1.8" (150-180 percent of 
normal), which is anomalous compared to climo. A low pressure system 
tracks east from the Great Lakes region Sunday putting southern New 
England in the warm sector as its warm front shifts northward. With 
the ample moisture and additional forcing this raises some flags for 
heavy rain potential or at least embedded heavy showers.

There is still variance across guidance in the exact track of 
the system/low pressure which has resulted in lower confidence 
in the details such as timing, amounts, and the potential for 
heavy rain. There has also been lacking consistency run to run 
within individual guidance as well. There is at least a general 
consensus across guidance that the higher moisture and better 
forcing(warm front) will more likely be south. This would favor 
our more south, southwest areas for higher rain totals. GFS and 
Canadian solutions (deterministic & ensemble) seem to reflect 
that pattern with higher amounts south while the ECMWF has a 
wider footprint with generally higher totals. When it comes to 
amounts solutions vary from 0.30" to 1.0" across ensembles based
on the 25-50th percentiles. Deterministic guidance had 
displayed more "aggressive" solutions with swaths of higher 
amounts >1.0". However, these solutions have had the most 
variance from run to run which further adds to the uncertainty. 
The most likely case at this point will be anywhere from a few 
tenths to an inch. This seems reasonable given the mean track. 
There isn't much indication of instability which should limit 
the heavier rain rates. If the warm frontal forcing shifts north
enough, we could get embedded heavy rain supporting by the 
added lift and efficient rain processes. So overall, there is 
confidence that we will get at least a soaking rain with rain 
arriving through the day Sunday continuing into Monday. We'll 
need to continue monitoring for the isolated heavy rain 
potential as models come into better agreement with the track 
over the next day or so. 

It is also possible showers may linger across the south coast and 
Cape and Islands Monday into Tuesday. This will depend on if the low 
or a boundary stalls across the waters. Wednesday leans mainly dry 
with potential for another system to arrive late-week with rain 
possible.

&&

.AVIATION /12Z FRIDAY THROUGH TUESDAY/...
Forecaster Confidence Levels...

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

12Z TAF Update: 

Today and Tonight...High confidence.

Areas of MVFR linger across Cape Cod and the Islands through
14-15z, otherwise VFR. NNW winds 8-12 kt with an occasional 
gust up to 20 kts. There may be an additional period of gusts 
around 20 kts in the evening (after 00Z).

KBOS Terminal...Moderate confidence in TAF.

VFR. Winds increase after 15Z to 8-12 kts with a few gusts 
around 18 kts today. Very low probability for a sea breeze to 
sneak in before 15Z before the winds increase. The current 
pattern should make this unlikely. 

KBDL Terminal...High confidence in TAF.

Outlook /Saturday through Tuesday/...

Saturday through Saturday Night: VFR. 

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

Sunday Night: MVFR/IFR conditions possible. Breezy. SHRA
likely, isolated TSRA, patchy BR.

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

Monday Night: VFR. Windy with local gusts up to 30 kt. Chance
SHRA.

Tuesday: VFR. Windy with areas of gusts up to 30 kt. Chance
SHRA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Saturday...High confidence.

Showers exit the coastal waters by the afternoon. Seas remain 
2-3 ft increasing to 3-4 ft early Saturday morning up to 5 ft 
across the outermost waters. Winds shift to the NW this morning
with speeds 8-15 kts and gusts to 20 kts this afternoon. 
Briefly Friday night into early Saturday, gusts may approach 
Small Craft Advisory criteria briefly. Gusts 20-25 kts are
possible generally between 03Z and 09Z. Due to it being very 
borderline and in brief duration, no SCA has been issued. 


Outlook /Saturday through Tuesday/...

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

Saturday Night: Winds less than 25 kt. Seas locally approaching
5 ft. 

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

Sunday Night: Winds less than 25 kt. Seas locally approaching
5 ft. Rain showers likely, isolated thunderstorms, patchy fog. 

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

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

Tuesday: Strong winds with gusts up to 40 kt. Seas up to 5 ft.
Chance of rain showers.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...High Risk for Rip Currents from Saturday morning through Saturday 
     evening for MAZ007-015-016-019-022.
RI...None.
MARINE...None.

&&

$$

DISCUSSION...Mensch
AVIATION...Dooley/Mensch
MARINE...Mensch

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