Lexington Weather

Current Conditions [‒] Current Conditions [+]

60.1°F Colder than last hour.

15.6°C

Cool

Clear

Tonight: Lo 50 °F

Saturday: Hi 75 °F

Dew Point: 49.5°F Decreased 0.1°F since last hour.

Humidity: 68% Increased 5.0% since last hour.

Air Quality Index: 24

Good

(Ozone)

Barometer: 29.99 in Rising 0.02 inHg/hr

1016 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Thursday: 0.03 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

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

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Fri Sep 11, 2026 10:01pm EDT

Overview:

- Pleasant conditions through tomorrow as the region sits under high pressure. Lows tonight dip into the 40s and 50s.

- Showers, and possibly a few thunderstorms, with brief torrential rainfall possible late Sat night into the first half of Sun. Low probability for localized flash flooding.

- Dry and seasonable Mon-Tue but a brief bout of summer warmth and humidity possible Wed and/or Thu ahead of a cold front.

Tonight:

Clear

Lo 50 °F

Clear, with a low around 50. North wind around 3 mph.

Saturday:

Sunny

Hi 75 °F

Sunny, with a high near 75. Southeast wind 0 to 9 mph.

Saturday Night:

Mostly Cloudy then Slight Chance Rain Showers

Lo 61 °F

A slight chance of rain showers after 4am. Mostly cloudy, with a low around 61. South wind 3 to 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

Sunday:

Patchy Fog

Hi 75 °F

A chance of rain showers before 7am, then rain showers and patchy fog between 7am and 9am, then patchy fog and showers and thunderstorms between 9am and 5pm. Some of the storms could produce heavy rain. Cloudy, with a high near 75. Southeast wind 2 to 7 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Sunday Night:

Patchy Fog

Lo 60 °F

Patchy fog between 7pm and 2am, then patchy fog and a slight chance of rain showers. Mostly cloudy, with a low around 60. West wind 2 to 10 mph. Chance of precipitation is 20%.

Monday:

Slight Chance Rain Showers then Mostly Sunny

Hi 74 °F

A slight chance of rain showers before 10am. Mostly sunny, with a high near 74. Northwest wind around 13 mph. Chance of precipitation is 20%.

Monday Night:

Mostly Clear

Lo 52 °F

Mostly clear, with a low around 52. North wind 5 to 12 mph.

Tuesday:

Sunny

Hi 71 °F

Sunny, with a high near 71. East wind around 6 mph.

Tuesday Night:

Partly Cloudy

Lo 54 °F

Partly cloudy, with a low around 54. South wind around 6 mph.

Wednesday:

Mostly Sunny

Hi 79 °F

Mostly sunny, with a high near 79. Southwest wind around 7 mph.

Wednesday Night:

Partly Cloudy

Lo 61 °F

Partly cloudy, with a low around 61. Southwest wind around 6 mph.

Thursday:

Mostly Sunny then Slight Chance Rain Showers

Hi 80 °F

A slight chance of rain showers after 2pm. Mostly sunny, with a high near 80. Southwest wind 5 to 8 mph.

Thursday Night:

Chance Rain Showers

Lo 59 °F

A chance of rain showers. Mostly cloudy, with a low around 59. West wind around 7 mph. Chance of precipitation is 40%.

Friday:

Chance Rain Showers

Hi 74 °F

A chance of rain showers. Mostly sunny, with a high near 74. Northeast wind around 8 mph.

FULL FORECAST

NWS Hourly Forecast -
Tonight 11pm through Sun 10am

Issued by:
National Weather Service Boston / Norton, MA
Updated Fri Sep 11, 2026 10:01pm EDT

11:00pm

Clear

59°F
Dew Pt 47°F
Wind from N

N 2 mph
Precip: 0%

Sat
12:00am

Clear

57°F
Dew Pt 46°F
Wind from N

N 2 mph
Precip: 0%

Sat
1:00am

Clear

55°F
Dew Pt 46°F
Wind from N

N 2 mph
Precip: 0%

Sat
2:00am

Clear

54°F
Dew Pt 46°F
Wind from N

N 1 mph
Precip: 0%

Sat
3:00am

Clear

52°F
Dew Pt 46°F
Wind from NE

NE 1 mph
Precip: 0%

Sat
4:00am

Clear

51°F
Dew Pt 46°F
Wind from NE

NE 1 mph
Precip: 0%

Sat
5:00am

Clear

51°F
Dew Pt 45°F
Wind from NE

NE 1 mph
Precip: 0%

Sat
6:00am

Sunny

51°F
Dew Pt 46°F
Wind from E

E 1 mph
Precip: 0%

Sat
7:00am

Sunny

52°F
Dew Pt 46°F
Wind from

0 mph
Precip: 0%

Sat
8:00am

Sunny

55°F
Dew Pt 48°F
Wind from

0 mph
Precip: 0%

Sat
9:00am

Sunny

59°F
Dew Pt 50°F
Wind from S

S 1 mph
Precip: 0%

Sat
10:00am

Sunny

63°F
Dew Pt 50°F
Wind from SE

SE 3 mph
Precip: 0%

Sat
11:00am

Sunny

68°F
Dew Pt 49°F
Wind from SE

SE 5 mph
Precip: 0%

Sat
12:00pm

Sunny

71°F
Dew Pt 48°F
Wind from SE

SE 6 mph
Precip: 0%

Sat
1:00pm

Sunny

73°F
Dew Pt 48°F
Wind from SE

SE 7 mph
Precip: 0%

Sat
2:00pm

Sunny

74°F
Dew Pt 49°F
Wind from S

S 8 mph
Precip: 0%

Sat
3:00pm

Mostly Sunny

74°F
Dew Pt 50°F
Wind from S

S 8 mph
Precip: 0%

Sat
4:00pm

Mostly Sunny

74°F
Dew Pt 52°F
Wind from SE

SE 9 mph
Precip: 0%

Sat
5:00pm

Mostly Sunny

73°F
Dew Pt 53°F
Wind from SE

SE 9 mph
Precip: 0%

Sat
6:00pm

Partly Cloudy

71°F
Dew Pt 54°F
Wind from SE

SE 8 mph
Precip: 0%

Sat
7:00pm

Partly Cloudy

69°F
Dew Pt 54°F
Wind from S

S 8 mph
Precip: 0%

Sat
8:00pm

Partly Cloudy

67°F
Dew Pt 55°F
Wind from S

S 7 mph
Precip: 0%

Sat
9:00pm

Partly Cloudy

65°F
Dew Pt 57°F
Wind from S

S 7 mph
Precip: 0%

Sat
10:00pm

Partly Cloudy

64°F
Dew Pt 58°F
Wind from S

S 6 mph
Precip: 0%

Sat
11:00pm

Mostly Cloudy

63°F
Dew Pt 59°F
Wind from S

S 6 mph
Precip: 0%

Sun
12:00am

Mostly Cloudy

62°F
Dew Pt 59°F
Wind from S

S 5 mph
Precip: 0%

Sun
1:00am

Mostly Cloudy

61°F
Dew Pt 59°F
Wind from S

S 5 mph
Precip: 1%

Sun
2:00am

Mostly Cloudy

61°F
Dew Pt 60°F
Wind from S

S 3 mph
Precip: 1%

Sun
3:00am

Mostly Cloudy

61°F
Dew Pt 60°F
Wind from S

S 5 mph
Precip: 8%

Sun
4:00am

Slight Chance Rain Showers

62°F
Dew Pt 60°F
Wind from S

S 5 mph
Precip: 15%

Sun
5:00am

Slight Chance Rain Showers

62°F
Dew Pt 60°F
Wind from S

S 6 mph
Precip: 22%
Rain: 0.01 in

Sun
6:00am

Chance Rain Showers

62°F
Dew Pt 61°F
Wind from S

S 6 mph
Precip: 28%
Rain: 0.01 in

Sun
7:00am

Rain Showers Likely

63°F
Dew Pt 61°F
Wind from S

S 6 mph
Precip: 58%
Rain: 0.02 in

Sun
8:00am

Rain Showers

63°F
Dew Pt 62°F
Wind from S

S 6 mph
Precip: 87%
Rain: 0.11 in

Sun
9:00am

Patchy Fog

65°F
Dew Pt 63°F
Wind from S

S 7 mph
Precip: 100%
Rain: 0.13 in

Sun
10:00am

Patchy Fog

66°F
Dew Pt 64°F
Wind from S

S 7 mph
Precip: 100%
Rain: 0.13 in

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 112359
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
759 PM EDT Fri Sep 11 2026

.WHAT HAS CHANGED...
No significant changes to the forecast.

&&

.KEY MESSAGES...

- Pleasant conditions through tomorrow as the region sits under
  high pressure. Lows tonight dip into the 40s and 50s.

- Showers, and possibly a few thunderstorms, with brief  
  torrential rainfall possible late Sat night into the first 
  half of Sun. Low probability for localized flash flooding.

- Dry and seasonable Mon-Tue but a brief bout of summer warmth
  and humidity possible Wed and/or Thu ahead of a cold front.

&&

.DISCUSSION...
KEY MESSAGE 1...Pleasant conditions through tomorrow as the
region sits under high pressure. Lows tonight dip into the 40s
and 50s.

Large high pressure continues to make its way over southern New 
England through the rest of today, ending up directly overhead 
tonight. With clear skies and light to calm winds overnight, 
radiational cooling is expected to take control, allowing low 
temperatures to fall into the 40s and 50s tonight. Areas that 
radiate well should drop into the mid 40s while areas closer to 
the coasts and don't radiate as well will fall into the mid to 
low 50s overnight.

High pressure remains affixed over the region into tomorrow,
then shifts off the east coast heading into the evening hours.
850 mb temperatures remain around 10-14C in the afternoon hours, 
and highs top out in the upper 70s, with areas closer to the 
coasts in the low 70s with local seabreezes.


KEY MESSAGE 2...Showers, and possibly a few thunderstorms, with 
brief torrential rainfall possible late Sat night into the first 
half of Sun. Low probability for localized flash flooding. 

High pressure moves off the coast Saturday night, clearing the
path for a low pressure to pass through Sunday. A larger high 
pressure over central Canada and the Northern Plains should 
drive a cold front well offshore by Monday morning. This will 
result in a rather brief period of rainfall across southern New 
England. The timing for the most likely period of rainfall has 
slowed slightly. It no appears to be some time from late 
Saturday night into Sunday morning. Rainfall should end from 
west to east Sunday afternoon. Low risk for thunderstorms as 
well, but not expecting severe weather.

The most likely outcome is one half to one inch of rainfall for 
most. However, there is a 35-50% chance for more than one inch 
of rainfall, especially across portions of eastern CT into RI. 
Regardless, it will be quite humid. Thus, localized downpours 
are possible. Will need to continue to monitor the flooding risk
this weekend.


KEY MESSAGE 3...Dry and seasonable Mon-Tue. A brief bout of
summer warmth and humidity possible Wed into Thu ahead of a 
cold front.

High pressure builds back into the region Mon and Tue,returning
dry and seasonable weather. This high pressure system moves east 
of the region by the middle of next week. This may allow for a 
brief return of summerlike warmth/humidity some time Wed into 
Thu. There is a fair amount of uncertainty on the timing of
another cold front Wed night into Thu. With a high pressure over 
the North Atlantic, would not be overly surprised if this timing
winds up being slower with later forecasts. Until this front 
passes us by, expecting above normal temperatures for Wed into 
Thu.

&&

.AVIATION /00Z SATURDAY THROUGH WEDNESDAY/...
Forecaster Confidence Levels...

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

Tonight...High confidence.

VFR. Calm/light NNW winds, with light onshore winds starting to
come in during the early morning hours Saturday as high pressure 
moves in directly overhead.

Saturday...High confidence.

VFR. S winds 5-10 knots, except for sea breezes along much of
the coast. 

Saturday Night...Moderate confidence.

Generally VFR with MVFR/IFR moving in from W to E starting
around 08z Sun. Chances for SHRA increase from W to E with these
lower ceilings, especially through Sunday morning. 

KBOS Terminal...High confidence in TAF.

KBDL Terminal...High confidence in TAF.

Outlook /Sunday through Wednesday/...

Sunday: MVFR/IFR conditions possible. SHRA, slight chance TSRA.

Sunday Night: VFR. Breezy. 

Monday: VFR. 

Monday Night: VFR. Breezy. 

Tuesday through Wednesday: VFR.

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Saturday...High confidence.

Large high pressure continues building over the waters through
Saturday, keeping winds and seas below Small Craft Advisory
criteria. Visibilities should also remain high through this
period. Seas 2-3 ft; winds shifting more NE tonight remaining
generally at or below 10 kt, then shifting more SE Saturday.

Saturday Night...High confidence.

High pressure shifts further E out to sea Saturday night. Higher
confidence that winds and seas remain below Small Craft Advisory 
criteria, though chances for showers and some embedded
thunderstorms increase greatly heading into Sunday morning from 
W to E. Visibilities may diminish, especially in heavier
rainfall. 

Outlook /Sunday through Wednesday/...

Sunday: Winds less than 25 kt. Areas of seas approaching 5 ft.
Rain showers, slight chance of thunderstorms. 

Sunday Night through Monday Night: Winds less than 25 kt. Seas
locally approaching 5 ft. 

Tuesday through Wednesday: Winds less than 25 kt.

&&

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

&&

$$

DISCUSSION...Belk/Hrencecin
AVIATION...Belk/Hrencecin
MARINE...Belk/Hrencecin

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