Lexington Weather

Current Conditions [‒] Current Conditions [+]

64.9°F Colder than last hour.

18.3°C

Comfortable

Overcast

Tonight: Lo 63 °F

Thursday: Hi 82 °F

Dew Point: 60.6°F Decreased 0.2°F since last hour.

Humidity: 86%

Air Quality Index: 19

Good

(Ozone)

Barometer: 30.03 in S

1017 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: 1 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Tonight, Thursday, & Thursday Night through Wednesday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Wed Sep 2, 2026 8:20pm EDT

Overview:

- Widespread showers and thunderstorms early Thursday morning and possibly Thursday afternoon

- Mainly dry & very pleasant Fri into early next week except for some diurnally scattered showers mainly on Sat. Pleasant temps too with highs in the 70s...but lower-middle 80s Fri.

- Elevated risk for dangerous rip currents for the Holiday Weekend especially by Sun into Mon.

Tonight:

Cloudy then Showers And T-Storms

Lo 63 °F

Tonight: Cloudy then Showers And Thunderstorms

Rain showers likely between 1am and 3am, then showers and thunderstorms between 3am and 4am, then patchy fog and showers and thunderstorms. Cloudy, with a low around 63. Southeast wind 5 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.

Thursday:

Patchy Fog

Hi 82 °F

Patchy fog and showers and thunderstorms before 10am, then patchy fog and a chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Southwest wind 6 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night:

Slight Chance Showers And T-Storms then Partly Cloudy

Lo 62 °F

Thursday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy

A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 62. West wind around 5 mph. Chance of precipitation is 20%.

Friday:

Mostly Sunny then Slight Chance Rain Showers

Hi 83 °F

A slight chance of rain showers after 2pm. Mostly sunny, with a high near 83. Northwest wind 2 to 7 mph. Chance of precipitation is 20%.

Friday Night:

Partly Cloudy

Lo 59 °F

Partly cloudy, with a low around 59. Northwest wind around 7 mph.

Saturday:

Mostly Sunny then Chance Rain Showers

Hi 72 °F

A chance of rain showers after 1pm. Mostly sunny, with a high near 72. North wind around 8 mph. Chance of precipitation is 40%.

Saturday Night:

Chance Rain Showers then Partly Cloudy

Lo 53 °F

A chance of rain showers before 10pm. Partly cloudy, with a low around 53. North wind around 6 mph. Chance of precipitation is 40%.

Sunday:

Sunny

Hi 73 °F

Sunny, with a high near 73. North wind 5 to 8 mph.

Sunday Night:

Mostly Clear

Lo 51 °F

Mostly clear, with a low around 51. Southwest wind around 5 mph.

Labor Day:

Sunny

Hi 77 °F

Sunny, with a high near 77. Northwest wind around 5 mph.

Monday Night:

Partly Cloudy

Lo 56 °F

Partly cloudy, with a low around 56. Southwest wind around 5 mph.

Tuesday:

Mostly Sunny

Hi 80 °F

Mostly sunny, with a high near 80. West wind 5 to 8 mph.

Tuesday Night:

Partly Cloudy

Lo 56 °F

Partly cloudy, with a low around 56. West wind around 6 mph.

Wednesday:

Mostly Sunny

Hi 77 °F

Mostly sunny, with a high near 77. West wind around 8 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 12am through Fri 11am

Issued by:
National Weather Service Boston / Norton, MA
Updated Wed Sep 2, 2026 8:20pm EDT

12:00am

Cloudy

65°F
Dew Pt 58°F
Wind from SE

SE 6 mph
Precip: 9%

1:00am

Chance Rain Showers

65°F
Dew Pt 58°F
Wind from SE

SE 6 mph
Precip: 27%
Rain: 0.01 in

2:00am

Rain Showers Likely

65°F
Dew Pt 58°F
Wind from SE

SE 7 mph
Precip: 62%
Rain: 0.04 in

3:00am

Showers And Thunderstorms

65°F
Dew Pt 59°F
Wind from SE

SE 8 mph
Precip: 80%
Rain: 0.05 in

4:00am

Patchy Fog

65°F
Dew Pt 61°F
Wind from S

S 8 mph
Precip: 80%
Rain: 0.05 in

5:00am

Patchy Fog

65°F
Dew Pt 62°F
Wind from S

S 9 mph
Precip: 89%
Rain: 0.05 in

6:00am

Patchy Fog

66°F
Dew Pt 63°F
Wind from S

S 9 mph
Precip: 89%
Rain: 0.05 in

7:00am

Patchy Fog

67°F
Dew Pt 63°F
Wind from S

S 9 mph
Precip: 65%
Rain: 0.04 in

8:00am

Patchy Fog

68°F
Dew Pt 66°F
Wind from S

S 9 mph
Precip: 41%
Rain: 0.04 in

9:00am

Chance Rain Showers

70°F
Dew Pt 67°F
Wind from S

S 9 mph
Precip: 28%
Rain: 0.03 in

10:00am

Patchy Fog

72°F
Dew Pt 69°F
Wind from SW

SW 9 mph
Precip: 16%
Rain: 0.02 in

11:00am

Patchy Fog

74°F
Dew Pt 70°F
Wind from SW

SW 9 mph
Precip: 16%
Rain: 0.02 in

12:00pm

Patchy Fog

76°F
Dew Pt 70°F
Wind from SW

SW 9 mph
Precip: 16%
Rain: 0.02 in

1:00pm

Slight Chance Showers And Thunderstorms

78°F
Dew Pt 69°F
Wind from W

W 9 mph
Precip: 23%
Rain: 0.02 in

2:00pm

Chance Showers And Thunderstorms

80°F
Dew Pt 69°F
Heat Index: 83°F
Wind from W

W 9 mph
Precip: 31%
Rain: 0.01 in

3:00pm

Chance Showers And Thunderstorms

81°F
Dew Pt 69°F
Heat Index: 84°F
Wind from W

W 8 mph
Precip: 31%
Rain: 0.01 in

4:00pm

Chance Showers And Thunderstorms

81°F
Dew Pt 69°F
Heat Index: 84°F
Wind from W

W 7 mph
Precip: 26%
Rain: 0.01 in

5:00pm

Slight Chance Showers And Thunderstorms

80°F
Dew Pt 69°F
Heat Index: 83°F
Wind from W

W 6 mph
Precip: 22%

6:00pm

Slight Chance Showers And Thunderstorms

79°F
Dew Pt 68°F
Wind from W

W 5 mph
Precip: 17%

7:00pm

Partly Cloudy

77°F
Dew Pt 68°F
Wind from S

S 3 mph
Precip: 13%

8:00pm

Partly Cloudy

74°F
Dew Pt 67°F
Wind from S

S 2 mph
Precip: 8%

9:00pm

Partly Cloudy

72°F
Dew Pt 67°F
Wind from S

S 2 mph
Precip: 6%

10:00pm

Partly Cloudy

71°F
Dew Pt 66°F
Wind from W

W 2 mph
Precip: 4%

11:00pm

Partly Cloudy

69°F
Dew Pt 66°F
Wind from W

W 2 mph
Precip: 2%

Fri
12:00am

Mostly Cloudy

68°F
Dew Pt 65°F
Wind from W

W 2 mph
Precip: 1%

Fri
1:00am

Mostly Cloudy

67°F
Dew Pt 65°F
Wind from W

W 2 mph
Precip: 1%

Fri
2:00am

Mostly Cloudy

66°F
Dew Pt 64°F
Wind from W

W 2 mph
Precip: 0%

Fri
3:00am

Mostly Cloudy

65°F
Dew Pt 63°F
Wind from W

W 2 mph
Precip: 0%

Fri
4:00am

Partly Cloudy

64°F
Dew Pt 63°F
Wind from W

W 2 mph
Precip: 0%

Fri
5:00am

Partly Cloudy

63°F
Dew Pt 63°F
Wind from NW

NW 2 mph
Precip: 0%

Fri
6:00am

Mostly Sunny

63°F
Dew Pt 63°F
Wind from NW

NW 2 mph
Precip: 0%

Fri
7:00am

Mostly Sunny

63°F
Dew Pt 62°F
Wind from W

W 3 mph
Precip: 0%

Fri
8:00am

Mostly Sunny

65°F
Dew Pt 63°F
Wind from W

W 3 mph
Precip: 0%

Fri
9:00am

Mostly Sunny

71°F
Dew Pt 67°F
Wind from W

W 5 mph
Precip: 0%

Fri
10:00am

Mostly Sunny

75°F
Dew Pt 68°F
Wind from NW

NW 5 mph
Precip: 0%

Fri
11:00am

Mostly Sunny

79°F
Dew Pt 67°F
Wind from NW

NW 6 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 022343
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
743 PM EDT Wed Sep 2 2026

.WHAT HAS CHANGED...

Increasing concern for dangerous rip currents for the Holiday 
Weekend...particularly by Sunday into Monday.

&&

.KEY MESSAGES...

- Widespread showers and thunderstorms early Thursday morning 
  and possibly Thursday afternoon 

- Mainly dry & very pleasant Fri into early next week except for 
  some diurnally scattered showers mainly on Sat. Pleasant temps 
  too with highs in the 70s...but lower-middle 80s Fri. 

- Elevated risk for dangerous rip currents for the Holiday
  Weekend especially by Sun into Mon.

&&

.DISCUSSION...

KEY MESSAGE 1...Widespread showers and thunderstorms early 
Thursday morning and possibly Thursday afternoon 

A frontal wave traverses over southern New England late tonight into 
tomorrow morning. A surface warm front lifts northeast with a rich 
of plume of moisture containing PWATs between 1.5 and 2". This will 
support a period of widespread showers with embedded thunder early 
tomorrow morning across southern New England. Shower activity begins 
around 2AM across the western areas and reaches the east coast 
around 4-6AM. Heavy downpours are likely with rich moisture in 
place. There is a marginal risk for flash flooding across western 
MA/CT in the Springfield/Hartford areas, but there is no strong 
signal for anything overly impactful at this time. Elevated 
instability will support some rumbles of thunder as showers move 
across the region, but deep layer shear and low/mid-level lapse 
rates do not appear to be favorable for deep moist convection 
capable of producing strong to severe storms.

As the frontal wave moves offshore, some mid-level dry air intrudes 
from the west which should support some clearing in the late-
morning to early afternoon hours. With the clearing will come 
diurnal heating and instability which will introduce another 
potential round of isolated to scattered showers and 
thunderstorms Thursday afternoon. Hi-Res model guidance has been
inconsistent with afternoon convection Thursday, so we leaned 
on a uniform 40% PoP for southern New England after 2PM. Expect 
clearing Thursday night into Friday with warm/sunny conditions 
expected Friday afternoon.


KEY MESSAGE 2...Mainly dry & very pleasant Fri into early next week 
except for some diurnally scattered showers mainly on Sat. Pleasant 
temps too with highs in the 70s...but lower-middle 80s Fri. 

Upper level shortwave energy will close off over the Canadian 
Maritimes over the Holiday Weekend. This will carve out an upper 
trough over the northeast resulting in pleasant weather. Mainly dry 
weather expected over the majority of this time. However...some 
northern stream shortwave energy will probably result in diurnally 
driven scattered showers mainly on Sat...but can not rule out a few 
on Fri. High pressure building southward from eastern Canada Sun 
into Mon should bring an end to this risk for the latter half of the 
Holiday Weekend. Highs on Fri will mainly be in the lower to middle 
80s...but generally 70s to near 80 this weekend into early next 
week. In fact...coolest days will be Sat and Sun as the eastern MA 
coast/Cape and Islands probably only see highs in the upper 60s to 
the lower 70s with a stiff northeast afternoon breeze. Overnight 
lows mainly in the 50s to the lower 60s...but there might be some 
40s in the normally coolest outlying locations by Sun night/Mon AM 
as high pressure builds across the region. 

KEY MESSAGE 3...Elevated risk for dangerous rip currents for the 
Holiday Weekend especially by Sun into Mon. 

Given persistent NE low level flow and swell...we do expect an 
elevated risk for dangerous rip currents for the Holiday Weekend. 
This is especially true by Sun into Mon on east facing ocean exposed 
beaches.

&&

.AVIATION /00Z THURSDAY THROUGH MONDAY/...

Forecaster Confidence Levels...

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

00z TAF Update..

Tonight and Thursday...High confidence in trends, moderate 
confidence in timing.

VFR conditions early this evening will deteriorate to MVFR to
localized IFR conditions from west to east during the overnight
hours into early Thu morning. A cluster of showers and perhaps 
a few embedded t-storms will enter inter MA/CT after midnight 
and move across the region by mid-morning Thu. Always uncertain
where the main shield of precipitation tracks with these
convective complexes. It is possible the worst of it passes to
our southwest where the greater instability resides. 
Nonetheless...brief heavy rainfall is possible with this 
activity along with a few embedded t-storms. LLWS is also a 
concern near daybreak given a modest southwest LLJ. 

Bulk of the showers should exit the coast by mid-late Thu morning.
We may see a few widely scattered showers/t-storms re-develop 
during Thu afternoon...but areal coverage should remain 
limited. Otherwise...gradual improvement should occur in 
ceilings from west to east but timing remains uncertain. Some 
locations especially northwest of I-95 may improve to VFR by 
mid-late afternoon, but IFR conditions may persist well into the
afternoon near the Cape and Islands. 

Southeast winds tonight gradually turn westerly on
Thursday...mainly at speeds of 6-12 knots or less. 

Thursday Night...High Confidence.

Mainly VFR except low clouds may hang tough near the Cape and
Islands. In addition...we will need to watch for localized 
patchy ground fog developing late in the typically prone 
locations. 

KBOS Terminal...Moderate confidence in TAF. Main concern for
showers and perhaps an embedded t-storm in the vicinity of the
terminal will be from 08z to 14z Thu. 

KBDL Terminal...Moderate confidence in TAF. Main concern for
showers and perhaps an embedded t-storm in the vicinity of the
terminal will be from 6z to 12z Thu. 

Outlook /Friday through Monday/...

Friday: VFR. 

Friday Night: VFR. Breezy. 

Saturday: VFR. Breezy. Chance SHRA, slight chance TSRA.

Saturday Night through Sunday: VFR. Breezy. 

Sunday Night through Labor Day: VFR. 

&&

.MARINE...
Forecaster Confidence Levels...

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

Tonight through Friday morning

A frontal wave moves over the coastal waters early Thursday morning. 
This will be accompanied by heavy downpours and possibly some 
thunder/lightning. Some locally stronger wind gusts to 20 knots are 
possible, but otherwise expect modest but steady southeast flow 
around 10 knots with gusts from 15 to 20 knots possible. Seas stay 
at sub SCY levels. Winds shift to the west/northwest tomorrow 
afternoon and carry into Friday with generally tranquil conditions.

Outlook /Friday through Monday/...

Friday through Friday Night: Winds less than 25 kt. 

Saturday: Low risk for Small Craft Advisory winds with areas of
gusts up to 30 kt. Areas of seas approaching 5 ft. 

Saturday Night: Low risk for Small Craft Advisory winds with
gusts up to 30 kt. Local rough seas. 

Sunday: Moderate risk for Small Craft Advisory winds with gusts
up to 30 kt. Areas of rough seas. 

Sunday Night: Winds less than 25 kt. Areas of rough seas. 

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

&&

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

&&

$$

DISCUSSION...RM/Frank
AVIATION...Frank
MARINE...RM/Frank

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