Lexington Weather

Current Conditions [‒] Current Conditions [+]

67.6°F Warmer than last hour.

19.8°C

Muggy

Few Clouds

Tonight: Lo 62 °F

Monday: Hi 75 °F

Dew Point: 66.4°F Increased 0.2°F since last hour .

Humidity: 96%

Air Quality Index: 23

Good

(Ozone)

Barometer: 29.78 in S

1008 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.86 in

Rain Saturday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

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

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sun Sep 13, 2026 10:10pm EDT

Overview:

- Heaviest rainfall ending, drier overnight, though low clouds and areas of fog are possible. A stray early morning shower remains possible too.

- Dry and fall-like Monday into Tuesday, with a chilly start Tuesday morning.

- High pressure in control next week brings generally quiet weather. Brief bout of summer warmth and humidity expected Wed- Fri.

Tonight:

Patchy Fog

Lo 62 °F

Patchy fog. Mostly cloudy, with a low around 62. West wind 2 to 6 mph.

Monday:

Chance Rain Showers then Mostly Sunny

Hi 75 °F

A chance of rain showers and patchy fog before 8am. Mostly sunny, with a high near 75. Northwest wind 8 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

Monday Night:

Clear

Lo 46 °F

Clear, with a low around 46. Northeast wind 3 to 12 mph, with gusts as high as 22 mph.

Tuesday:

Sunny

Hi 69 °F

Sunny, with a high near 69. Northeast wind 1 to 9 mph.

Tuesday Night:

Mostly Clear

Lo 51 °F

Mostly clear, with a low around 51. South wind 2 to 8 mph.

Wednesday:

Sunny

Hi 79 °F

Sunny, with a high near 79. South wind 5 to 8 mph.

Wednesday Night:

Partly Cloudy

Lo 60 °F

Partly cloudy, with a low around 60. Southwest wind 2 to 7 mph.

Thursday:

Mostly Sunny then Slight Chance Rain Showers

Hi 78 °F

A slight chance of rain showers after 4pm. Mostly sunny, with a high near 78. South wind 2 to 6 mph.

Thursday Night:

Chance Rain Showers

Lo 61 °F

A chance of rain showers. Mostly cloudy, with a low around 61. Southwest wind around 6 mph. Chance of precipitation is 30%.

Friday:

Chance Rain Showers then Partly Sunny

Hi 77 °F

A chance of rain showers before 10am. Partly sunny, with a high near 77. North wind around 8 mph. Chance of precipitation is 30%.

Friday Night:

Partly Cloudy

Lo 55 °F

Partly cloudy, with a low around 55. North wind around 6 mph.

Saturday:

Mostly Sunny then Slight Chance Rain Showers

Hi 71 °F

A slight chance of rain showers after 4pm. Mostly sunny, with a high near 71. East wind around 6 mph.

Saturday Night:

Chance Rain Showers

Lo 55 °F

A chance of rain showers. Mostly cloudy, with a low around 55. South wind around 6 mph. Chance of precipitation is 30%.

Sunday:

Chance Rain Showers

Hi 69 °F

A chance of rain showers. Partly sunny, with a high near 69. Southwest wind 5 to 8 mph.

FULL FORECAST

NWS Hourly Forecast -
Tonight 11pm through Tue 10am

Issued by:
National Weather Service Boston / Norton, MA
Updated Sun Sep 13, 2026 10:10pm EDT

11:00pm

Patchy Fog

67°F
Dew Pt 65°F
Wind from W

W 2 mph
Precip: 0%

Mon
12:00am

Patchy Fog

67°F
Dew Pt 64°F
Wind from W

W 3 mph
Precip: 1%

Mon
1:00am

Patchy Fog

66°F
Dew Pt 64°F
Wind from W

W 3 mph
Precip: 2%

Mon
2:00am

Patchy Fog

66°F
Dew Pt 64°F
Wind from SW

SW 5 mph
Precip: 3%

Mon
3:00am

Patchy Fog

66°F
Dew Pt 63°F
Wind from W

W 5 mph
Precip: 4%

Mon
4:00am

Patchy Fog

66°F
Dew Pt 63°F
Wind from W

W 6 mph
Precip: 5%

Mon
5:00am

Patchy Fog

66°F
Dew Pt 62°F
Wind from W

W 6 mph
Precip: 6%

Mon
6:00am

Chance Rain Showers

65°F
Dew Pt 61°F
Wind from W

W 8 mph
Precip: 26%
Rain: 0.02 in

Mon
7:00am

Chance Rain Showers

63°F
Dew Pt 59°F
Wind from W

W 9 mph
Precip: 34%
Rain: 0.03 in

Mon
8:00am

Partly Sunny

63°F
Dew Pt 58°F
Wind from W

W 10 mph
Precip: 5%

Mon
9:00am

Mostly Sunny

65°F
Dew Pt 56°F
Wind from NW

NW 13 mph
Precip: 5%

Mon
10:00am

Mostly Sunny

68°F
Dew Pt 54°F
Wind from NW

NW 14 mph
Precip: 3%

Mon
11:00am

Sunny

71°F
Dew Pt 51°F
Wind from NW

NW 16 mph
Precip: 0%

Mon
12:00pm

Sunny

72°F
Dew Pt 50°F
Wind from NW

NW 16 mph
Precip: 0%

Mon
1:00pm

Sunny

73°F
Dew Pt 49°F
Wind from NW

NW 16 mph
Precip: 0%

Mon
2:00pm

Sunny

74°F
Dew Pt 48°F
Wind from NW

NW 16 mph
Precip: 0%

Mon
3:00pm

Sunny

74°F
Dew Pt 46°F
Wind from NW

NW 15 mph
Precip: 0%

Mon
4:00pm

Sunny

74°F
Dew Pt 45°F
Wind from NW

NW 15 mph
Precip: 0%

Mon
5:00pm

Sunny

73°F
Dew Pt 46°F
Wind from N

N 14 mph
Precip: 0%

Mon
6:00pm

Clear

70°F
Dew Pt 46°F
Wind from N

N 12 mph
Precip: 0%

Mon
7:00pm

Clear

66°F
Dew Pt 46°F
Wind from N

N 9 mph
Precip: 0%

Mon
8:00pm

Clear

62°F
Dew Pt 45°F
Wind from N

N 7 mph
Precip: 0%

Mon
9:00pm

Clear

59°F
Dew Pt 45°F
Wind from N

N 8 mph
Precip: 0%

Mon
10:00pm

Clear

56°F
Dew Pt 44°F
Wind from N

N 7 mph
Precip: 0%

Mon
11:00pm

Clear

54°F
Dew Pt 44°F
Wind from N

N 7 mph
Precip: 0%

Tue
12:00am

Clear

53°F
Dew Pt 44°F
Wind from N

N 7 mph
Precip: 0%

Tue
1:00am

Clear

52°F
Dew Pt 44°F
Wind from NE

NE 7 mph
Precip: 0%

Tue
2:00am

Clear

51°F
Dew Pt 44°F
Wind from E

E 6 mph
Precip: 0%

Tue
3:00am

Clear

49°F
Dew Pt 44°F
Wind Chill: 47°F
Wind from E

E 6 mph
Precip: 0%

Tue
4:00am

Clear

47°F
Dew Pt 44°F
Wind Chill: 45°F
Wind from NE

NE 5 mph
Precip: 0%

Tue
5:00am

Clear

46°F
Dew Pt 44°F
Wind Chill: 45°F
Wind from N

N 3 mph
Precip: 0%

Tue
6:00am

Sunny

46°F
Dew Pt 44°F
Wind from N

N 2 mph
Precip: 0%

Tue
7:00am

Sunny

47°F
Dew Pt 44°F
Wind from N

N 2 mph
Precip: 0%

Tue
8:00am

Sunny

50°F
Dew Pt 45°F
Wind from N

N 1 mph
Precip: 0%

Tue
9:00am

Sunny

55°F
Dew Pt 47°F
Wind from N

N 3 mph
Precip: 0%

Tue
10:00am

Sunny

59°F
Dew Pt 47°F
Wind from NE

NE 5 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 132259
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
659 PM EDT Sun Sep 13 2026

.WHAT HAS CHANGED...
The heaviest rainfall has come to an end, with remaining showers 
tapering off from west to east through early this evening. 
Additional significant rainfall is not expected, though localized 
nuisance flooding may linger given the 2 to 4 inches of rain that 
fell across portions of Rhode Island and southeast Massachusetts 
today. Lastly, Small Craft Advisories issued for most waters 
starting Monday afternoon through Monday night for gusty winds.

&&

.KEY MESSAGES...

- Heaviest rainfall ending, drier overnight, though low clouds
  and areas of fog are possible. A stray early morning shower
  remains possible too.

- Dry and fall-like Monday into Tuesday, with a chilly start
  Tuesday morning.

- High pressure in control next week brings generally quiet 
  weather. Brief bout of summer warmth and humidity expected 
  Wed- Fri.

&&

.DISCUSSION...
KEY MESSAGE 1...Heaviest rainfall ending, drier overnight, though 
low clouds and areas of fog are possible. A stray early morning 
shower remains possible too.

The back edge of the heaviest rain is now working from west to east 
across southern New England, with clouds thinning across eastern New 
York and approaching western Massachusetts. Rainfall totals have 
been impressive today, with many areas seeing 2 to 4 inches, mainly 
across Rhode Island and southeast Massachusetts. The Flash Flood 
Watch remains in effect through 6 PM. While the heaviest rain is 
over, light to moderate showers linger and could still lead to 
nuisance flooding. Expect these showers to continue for the next 
couple of hours before wrapping up between 4 PM and 6 PM, though a 
few may linger an additional hour or so across the outer Cape.

Drier conditions arrive overnight, though low clouds and areas of 
fog may persist into early Monday morning. A final push of showers 
is possible toward daybreak, though guidance has generally shown 
this activity weakening as it approaches southern New England, 
leaving just a spotty shower or two, mainly in the 4 AM to 8 AM time 
frame. It is worth mentioning that some of the high-resolution 
guidance indicates a bit of a resurgence in shower activity as it 
approaches the coast, possibly picking up on some instability near 
the shore. Nevertheless, this would not lead to impactful weather 
and would be nothing like what we saw today.

KEY MESSAGE 2...Dry and fall-like Monday into Tuesday, with a chilly 
start Tuesday morning.

Surface high pressure around 1020-1025 mb builds in from the Great 
Lakes region on Monday, settles overhead Monday night, and remains 
with us through Tuesday as a 1030 mb surface high. Little weather to 
talk about during this time frame. While there is lingering moisture 
early Monday morning, with some areas of fog, a much drier airmass 
arrives by noon as PWATs fall below half an inch. 

CAA during the day allows for a period of breezy northwest winds. 
Forecast soundings through BUFKIT show a well-mixed boundary layer 
upwards of 850 mb, which should allow most of the wind aloft to mix 
to the surface. Winds aloft are 25 to 30 kt, resulting in surface 
wind gusts of roughly 20 to 30 mph from the north-northwest. Highs 
Monday afternoon are largely in the lower to middle 70s.

With high pressure overhead Monday night, winds decouple, allowing 
for effective radiational cooling. Have opt'd to do a model blend to 
show the coldest of the guidance. This would mean many of us wake up 
Tuesday morning in the 40s; however, would not be shocked if towns 
in far northwestern Franklin County dip to 38 to 40 degrees. That 
being said, urban centers remain in the upper 40s to lower 50s. 
Boston may retain enough heat due to the urban heat island effect to 
maintain lows in the middle 50s. Lastly, there could be areas of 
ground fog due to the abundant recent rainfall.

Heading into Tuesday, a crisp and dry day with dew points in the 
50s, with some upper 40s possible in northern Massachusetts. 
Meanwhile, 925 mb temperatures settle around +9C to +12C, which 
would suggest high temperatures in the middle 60s to lower 70s. High 
pressure slowly drifts east during the day, with winds shifting to a 
north-northeasterly direction.

KEY MESSAGE 3...High pressure in control next week brings 
generally quiet weather. Brief bout of summer warmth and 
humidity expected Wed- Fri.

High pressure firmly in control by Tuesday will bring much drier 
weather with it. Under dry NW flow dewpoints will be very comfortable 
to start the week, in the 40s. This will be a comfortable taste of 
Fall Tuesday when combined with high temperatures in the upper 60s 
(coasts) to low 70s (inland). As the high shifts over the Atlantic 
Wednesday flow turns southerly bringing the return of more summer-
like temperatures and dewpoints in the upper 70s and mid 60s 
respectively. Still some uncertainty with regard to the forecast for 
late week and next weekend. Zonal mid level flow continues with 
potential for a low to cross somewhere in the vicinity of southern 
New England; whether that stays to our north or goes overhead is 
uncertain, but generally looking at a better shot of unsettled 
weather late Thursday onward.

&&

.AVIATION /00Z MONDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...

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

00z TAF Update: Widespread rain ending from west to east this 
afternoon.

Through 00z...Moderate confidence in trends and timing.

While much of the night will be dry, a decaying line of showers
pushes through southern New England from 06z-10z. Ceilings are 
generally LIFR to IFR, with some improvement overnight to high-
end IFR, if not MVFR. A drier airmass arrives predawn, which 
will erode cloud cover and allow conditions to trend VFR between
10- 14z Monday.

Monday and Monday Night...High confidence.

VFR. NW to NNW winds 8 to 12 kt with gusts 20 to 25 kt. Winds ease 
overnight, becoming light and variable under clear skies. Isolated 
areas of ground fog are possible due to abundant recent rainfall.

Tuesday...High confidence.

VFR. Light N to NNE winds, becoming E/SE by the end of the day.

KBOS Terminal...Moderate confidence in TAF.

KBDL Terminal...Moderate confidence in TAF.

Outlook /Tuesday through Friday/...

Tuesday: VFR. Breezy. 

Tuesday Night through Wednesday Night: VFR. 

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

Thursday Night: Mainly VFR, with local MVFR possible. Chance
SHRA.

Friday: VFR.

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Tuesday...High confidence.

Surface low pressure moves northeast from the southern coastal 
waters Sunday afternoon, crossing into the Gulf of Maine overnight 
before reaching Nova Scotia Monday morning. Meanwhile, high pressure 
builds in from the Great Lakes region on Monday, resulting in a 
tightening pressure gradient and gusty northerly winds Monday 
afternoon through the overnight hours. There may be a brief period 
of gusts around 25 kt, thus a marginal Small Craft Advisory has been 
issued. Seas during this time are 2 to 3 ft across the nearshore 
waters and 3 to 4 ft across the outer waters. However, the outermost 
portions of the forecast zones may approach 5 ft.

Outlook /Tuesday through Friday/...

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

Tuesday Night through Wednesday Night: Winds less than 25 kt.
Seas locally approaching 5 ft. 

Thursday: Winds less than 25 kt. 

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

Friday: Winds less than 25 kt. Slight chance of rain showers.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 11 AM Monday to 2 AM EDT Tuesday for 
     ANZ231>235-237-250-254>256.

&&

$$

DISCUSSION...BW/Dooley
AVIATION...BW/Dooley
MARINE...BW/Dooley

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