Lexington Weather

Current Conditions [‒] Current Conditions [+]

65.7°F Colder than last hour.

18.7°C

Comfortable

Partly cloudy

Tonight: Lo 51 °F

Labor Day: Hi 76 °F

Dew Point: 57.6°F Decreased 1.4°F since last hour.

Humidity: 75%

Air Quality Index: 20

Good

(Fine Particles)

Barometer: 29.91 in S

1013 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.34 in

Rain Saturday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

Alerts / Advisories [‒] Alerts / Advisories [+]

Southeast Middlesex County, MA - Rip Current Statement
- SEE ALL NEARBY ALERTS -

NWS Weather Forecast -
Tonight, Labor Day, & Monday Night through Sunday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sun Sep 6, 2026 2:27pm EDT

Overview:

- Mix of clouds and sun with off-and-on showers through the afternoon, with decreasing clouds and a cool evening tonight. Full sun, seasonable temperatures and low humidity for the Labor Day Monday holiday.

- Dry conditions Tuesday through much of Wednesday. Pattern becomes more unsettled later Wednesday into early Friday with periods of showers possible.

Rip Current Statement

Tonight:

Isolated Rain Showers then Mostly Clear

Lo 51 °F

Isolated rain showers before 7pm. Mostly clear, with a low around 51. Northwest wind around 5 mph. Chance of precipitation is 20%.

Labor Day:

Sunny

Hi 76 °F

Sunny, with a high near 76. Northwest wind 5 to 10 mph.

Monday Night:

Mostly Clear

Lo 57 °F

Mostly clear, with a low around 57. West wind 5 to 8 mph.

Tuesday:

Sunny

Hi 80 °F

Sunny, with a high near 80. Northwest wind around 7 mph.

Tuesday Night:

Mostly Cloudy

Lo 59 °F

Mostly cloudy, with a low around 59. North wind around 5 mph.

Wednesday:

Mostly Cloudy

Hi 77 °F

Mostly cloudy, with a high near 77. Southeast wind 2 to 8 mph.

Wednesday Night:

Chance Rain Showers

Lo 68 °F

A chance of rain showers after 9pm. Mostly cloudy, with a low around 68. Southwest wind 8 to 13 mph. Chance of precipitation is 40%.

Thursday:

Chance Rain Showers

Hi 82 °F

A chance of rain showers. Partly sunny, with a high near 82. Southwest wind around 12 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.

Thursday Night:

Slight Chance Rain Showers then Mostly Cloudy

Lo 61 °F

A slight chance of rain showers before 9pm. Mostly cloudy, with a low around 61. West wind 6 to 9 mph, with gusts as high as 22 mph.

Friday:

Mostly Sunny

Hi 75 °F

Mostly sunny, with a high near 75. Northwest wind around 8 mph.

Friday Night:

Mostly Clear

Lo 56 °F

Mostly clear, with a low around 56. Northwest wind around 6 mph.

Saturday:

Sunny

Hi 76 °F

Sunny, with a high near 76. Southwest wind 3 to 7 mph.

Saturday Night:

Partly Cloudy

Lo 59 °F

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

Sunday:

Mostly Sunny

Hi 80 °F

Mostly sunny, with a high near 80. Southwest wind 5 to 9 mph.

FULL FORECAST

NWS Hourly Forecast -
Tonight 7pm through Tue 6am

Issued by:
National Weather Service Boston / Norton, MA
Updated Sun Sep 6, 2026 2:27pm EDT

7:00pm

Mostly Cloudy

66°F
Dew Pt 54°F
Wind from NW

NW 2 mph
Precip: 12%

8:00pm

Partly Cloudy

60°F
Dew Pt 53°F
Wind from NW

NW 3 mph
Precip: 8%

9:00pm

Partly Cloudy

59°F
Dew Pt 52°F
Wind from NW

NW 3 mph
Precip: 1%

10:00pm

Mostly Clear

57°F
Dew Pt 51°F
Wind from NW

NW 3 mph
Precip: 0%

11:00pm

Clear

56°F
Dew Pt 51°F
Wind from NW

NW 3 mph
Precip: 0%

Mon
12:00am

Clear

55°F
Dew Pt 50°F
Wind from NW

NW 3 mph
Precip: 0%

Mon
1:00am

Mostly Clear

54°F
Dew Pt 49°F
Wind from NW

NW 5 mph
Precip: 0%

Mon
2:00am

Clear

54°F
Dew Pt 49°F
Wind from NW

NW 5 mph
Precip: 0%

Mon
3:00am

Clear

52°F
Dew Pt 49°F
Wind from W

W 5 mph
Precip: 0%

Mon
4:00am

Clear

52°F
Dew Pt 48°F
Wind from W

W 5 mph
Precip: 0%

Mon
5:00am

Clear

52°F
Dew Pt 48°F
Wind from W

W 3 mph
Precip: 0%

Mon
6:00am

Sunny

52°F
Dew Pt 48°F
Wind from W

W 5 mph
Precip: 0%

Mon
7:00am

Sunny

53°F
Dew Pt 49°F
Wind from W

W 5 mph
Precip: 0%

Mon
8:00am

Sunny

56°F
Dew Pt 51°F
Wind from NW

NW 6 mph
Precip: 0%

Mon
9:00am

Sunny

60°F
Dew Pt 51°F
Wind from NW

NW 8 mph
Precip: 1%

Mon
10:00am

Sunny

64°F
Dew Pt 50°F
Wind from NW

NW 8 mph
Precip: 1%

Mon
11:00am

Sunny

68°F
Dew Pt 50°F
Wind from N

N 9 mph
Precip: 0%

Mon
12:00pm

Sunny

71°F
Dew Pt 48°F
Wind from NW

NW 10 mph
Precip: 0%

Mon
1:00pm

Sunny

73°F
Dew Pt 48°F
Wind from NW

NW 10 mph
Precip: 1%

Mon
2:00pm

Sunny

74°F
Dew Pt 47°F
Wind from NW

NW 9 mph
Precip: 0%

Mon
3:00pm

Sunny

75°F
Dew Pt 48°F
Wind from NW

NW 9 mph
Precip: 0%

Mon
4:00pm

Sunny

76°F
Dew Pt 48°F
Wind from NW

NW 9 mph
Precip: 0%

Mon
5:00pm

Sunny

75°F
Dew Pt 49°F
Wind from NW

NW 9 mph
Precip: 0%

Mon
6:00pm

Mostly Clear

73°F
Dew Pt 51°F
Wind from NW

NW 8 mph
Precip: 0%

Mon
7:00pm

Mostly Clear

70°F
Dew Pt 51°F
Wind from NW

NW 7 mph
Precip: 0%

Mon
8:00pm

Mostly Clear

65°F
Dew Pt 51°F
Wind from NW

NW 6 mph
Precip: 0%

Mon
9:00pm

Mostly Clear

64°F
Dew Pt 51°F
Wind from NW

NW 6 mph
Precip: 0%

Mon
10:00pm

Mostly Clear

62°F
Dew Pt 51°F
Wind from NW

NW 6 mph
Precip: 0%

Mon
11:00pm

Clear

61°F
Dew Pt 50°F
Wind from NW

NW 5 mph
Precip: 0%

Tue
12:00am

Mostly Clear

59°F
Dew Pt 51°F
Wind from NW

NW 5 mph
Precip: 0%

Tue
1:00am

Mostly Clear

58°F
Dew Pt 51°F
Wind from W

W 5 mph
Precip: 0%

Tue
2:00am

Mostly Clear

58°F
Dew Pt 51°F
Wind from W

W 5 mph
Precip: 0%

Tue
3:00am

Mostly Clear

57°F
Dew Pt 51°F
Wind from W

W 5 mph
Precip: 0%

Tue
4:00am

Mostly Clear

57°F
Dew Pt 50°F
Wind from W

W 6 mph
Precip: 0%

Tue
5:00am

Mostly Clear

56°F
Dew Pt 50°F
Wind from W

W 6 mph
Precip: 0%

Tue
6:00am

Sunny

56°F
Dew Pt 51°F
Wind from W

W 6 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 061938
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
338 PM EDT Sun Sep 6 2026

.WHAT HAS CHANGED...
No significant changes.

&&

.KEY MESSAGES...

- Mix of clouds and sun with off-and-on showers through the
  afternoon, with decreasing clouds and a cool evening tonight.
  Full sun, seasonable temperatures and low humidity for the
  Labor Day Monday holiday.

- Dry conditions Tuesday through much of Wednesday. Pattern
  becomes more unsettled later Wednesday into early Friday with
  periods of showers possible. 

&&

.DISCUSSION...
KEY MESSAGE 1...Mix of clouds and sun with off-and-on showers 
through the afternoon, with decreasing clouds and a cool evening 
tonight. Full sun, seasonable temperatures and low humidity for 
the Labor Day Monday holiday.

We're still governed by broad cyclonic flow aloft around a closed 
mid/upper low over Nova Scotia, a feature which has moved very 
little over the last 24 hours. This has led to a mix of clouds and 
sun, and some heating where clouds have scattered has led to 
"destructive sunshine" which has blossomed additional cloudiness 
with scattered pop-up showers moving southward. These clouds and 
scattered showers will continue through sundown. An additional 
shortwave and mid-level moisture move southward from coastal ME 
could sustain cloud cover across eastern New England for a few hours 
after sundown, but we should trend mostly clear with falling 
dewpoints overnight supporting good radiational cooling. There could 
be some patchy mist or fog developing around sunrise, especially in 
those areas which received rain. We also have one final evening with 
nuisance splashover around the early-evening high tide at Nantucket 
and the Cape and Islands with coastal flood advisories still in
effect. We fell just short of Advisory criterion last night at 
Nantucket at 4.91 ft, and tonight should end up being similar 
with a higher high-tide but weaker northerly winds. Lows tonight
should dip into the mid to upper 40s in the favored radiational
cooling locations, and in the low to mid 50s elsewhere, warmest
lows Cape and Islands. 

Rising 500 mb heights on Labor Day Monday support full sun and 
temperatures warming back into the mid to upper 70s, with low 
humidity levels (dewpoints in the 40s to low 50s!) with some 
northwesterly winds around 10 mph. Overall about as ideal weather 
conditions for outdoor activities as one could ask for. By Monday 
evening, clear skies early favoring strong radiational cooling then 
give way to increasing midlevel cloud cover from the northwest by 
the pre-dawn hours as a strong shortwave disturbance aloft passes to 
our northeast. Lows end up slightly warmer, in the to mid 50s for 
most, with mid/upper 50s for the eastern and southern coastlines. 

KEY MESSAGE 2...Dry conditions Tuesday through much of 
Wednesday. Pattern becomes more unsettled later Wednesday into 
early Friday with periods of showers possible. 

On Tuesday, the deeper mid-level trough continues to shift further 
eastward as a mid-level ridge continues to build in from the west. 
925mb temperatures warm to +17-18C yielding high temperatures in the 
upper 70s with locations potentially hitting the 80 degree mark in 
the valleys. High pressure in place will support mainly dry 
conditions.  

Ensemble guidance shows a signal for a transition to a more 
unsettled pattern mid to late week. The mid-level ridge begins to 
break down Wednesday, becoming more zonal by Thursday. Ensemble 
guidance shows a consensus with a series of shortwave troughs moving 
through the flow later Wednesday through Friday. This should be 
accompanied by a plume of above normal moisture, rising to 160-190% 
of normal by early Thursday yielding PWATS of 1.5" approaching 2.0". 
The positioning of an upper jet should supply ascent for periods of 
showers. There is spread across guidance in the finer details of the 
timing of the waves which will influence timing of the showers. A 
shortwave pushes through sometime Wednesday evening/night triggering 
the first round of showers which should taper off through the 
morning Thursday (at latest). The next wave moves through late 
Thursday/Thursday Night bringing another round of showers. With the 
timing of the waves still variable across guidance this leaves some 
uncertainty in thunderstorm/downpour potential. There will be plenty 
of moisture to support downpours; however, the timing of the wave 
would need be early enough to tap into the marginal instability 
build through the day for convection. Something to keep monitoring. 
For now, we are not seeing a strong signal for severe or flash 
flooding, just periods of showers with generally light accumulations 
(< 0.60"). 

An 850mb 35-45kt LLJ shifts across southern New England into 
Thursday. There does raise a flag for potentially gustier winds; 
however, this will come down to how well we can mix down from 850mb 
or even 925mb. If things align, ensembles show potential for gusts 
in the 20-35 mph range on Thursday across the land and coastal 
waters. Still plenty of details to work out in the pattern before we 
come into better agreement about the gusts, but something to watch 
for now.  

Temperatures Wednesday/Thursday lean near to slightly above normal 
with temperatures in the mid to upper 70s. A cold front pushes 
through early Friday bringing a cooler airmass this will support 
highs in the upper 60s low 70s. 

&&

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

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

15z TAF Update: 

Today: High confidence. 

SCT-BKN VFR/MVFR ceilings (020-040 bases) continue as of mid-
morning, with widely SCT light -SHRA around pushing southward. 
While showers come to an end shortly, anticipate some lifting 
of cloud bases closer to VFR levels by afternoon. Another surge 
of moisture comes down now over central Maine could bring an 
increase in clouds toward BKN later this afternoon for eastern 
terminals. North to northeast winds around 5-10 kt.

Tonight: High confidence. 

Mostly VFR as cloud cover decreases. Some risk for patchy fog in
the river valleys prior to sunrise (08-12z) but its development
is uncertain. Winds decrease to light northerly. 

Monday and Monday Night: High confidence.

VFR. NW winds increase to around 8-12 kt during the daytime,
easing and becoming WNW with an increase in VFR clouds after
06z Tue.

KBOS Terminal...High confidence in TAF. Mix of SCT-BKN VFR/MVFR
ceilings, but should trend VFR by early afternoon. NE winds
around 5-10 kt. Seabreeze possible but could be late in the 
day.

KBDL Terminal...High confidence in TAF.

Outlook /Monday Night through Friday/...

Tuesday through Tuesday Night: VFR. 

Wednesday: VFR. Breezy. 

Wednesday Night: Mainly VFR, with local IFR possible. Windy
with local gusts up to 30 kt. Chance SHRA.

Thursday: VFR. Windy with areas of gusts up to 30 kt. Slight
chance SHRA.

Thursday Night: VFR. Breezy. Slight chance SHRA.

Friday: VFR. 

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Monday Night: High confidence.

SCAs continue through early this evening to allow for residual 5
ft seas to subside. 

Northerly winds around 15-20 kt this afternoon decrease to
around 10-15 kt overnight tonight. Essentially a repeat of those
wind conditions for Monday. Northerly winds pick back up again 
Monday to around 15-20 kt, then subside overnight. Seas will
continue to decrease to 3 ft or less all waters by tonight and
remain in that range through Monday night. 

Off-and-on light showers will continue through late this
afternoon. Otherwise dry weather with good visibility then
predominates.

Outlook /Monday Night through Friday/...

Tuesday through Wednesday: Winds less than 25 kt. 

Wednesday Night: Moderate risk for Small Craft Advisory winds
with gusts up to 30 kt. Areas of rough seas. Chance of rain
showers. 

Thursday: Moderate risk for Small Craft Advisory winds with
gusts up to 30 kt. Rough seas up to 9 ft. Slight chance of rain
showers. 

Thursday Night: Winds less than 25 kt. Areas of rough seas.
Chance of rain showers. 

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

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...High Risk for Rip Currents until 8 PM EDT this evening for MAZ007-
     014>016-019-022>024.
     Coastal Flood Advisory until 8 PM EDT this evening for 
     MAZ022>024.
RI...None.
MARINE...Small Craft Advisory until 8 PM EDT this evening for ANZ250-
     254-255.

&&

$$

DISCUSSION...Loconto/Mensch
AVIATION...Loconto/Mensch
MARINE...Loconto/Mensch

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