Lexington Weather

Current Conditions [‒] Current Conditions [+]

74.5°F Warmer than last hour.

23.6°C

Very Muggy

Mostly cloudy

This Afternoon: Hi 85 °F

Tonight: Lo 59 °F

Dew Point: 72.3°F Increased 0.3°F since last hour .

Humidity: 93%

Air Quality Index: 34

Good

(Ozone)

Barometer: 29.72 in Rising 0.03 inHg/hr

1006 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.41 in

Rain Tuesday: 0.82 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
This Afternoon, Tonight, & Thursday through Tuesday Night

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Wed Jul 22, 2026 2:31pm EDT

Overview:

- Isolated showers and thunderstorms this afternoon. Drier conditions following today's cold front.

- Mainly dry with seasonable temperatures through the weekend.

- Rain and thunderstorm chances return for the first half of next week. Seasonable temperatures continue.

This Afternoon:

Chance Showers And T-Storms

Hi 85 °F

This Afternoon: Chance Showers And Thunderstorms

A chance of showers and thunderstorms before 5pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 85. West wind around 12 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

Tonight:

Slight Chance Showers And T-Storms then Partly Cloudy

Lo 59 °F

Tonight: Slight Chance Showers And Thunderstorms then Partly Cloudy

A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 59. West wind 5 to 9 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

Thursday:

Sunny

Hi 80 °F

Sunny, with a high near 80. Northwest wind 1 to 7 mph.

Thursday Night:

Clear

Lo 55 °F

Clear, with a low around 55. Southwest wind around 5 mph.

Friday:

Sunny

Hi 82 °F

Sunny, with a high near 82. Northeast wind 2 to 7 mph.

Friday Night:

Mostly Clear

Lo 60 °F

Mostly clear, with a low around 60. South wind 2 to 7 mph.

Saturday:

Sunny

Hi 83 °F

Sunny, with a high near 83. Northeast wind 1 to 8 mph.

Saturday Night:

Mostly Clear

Lo 60 °F

Mostly clear, with a low around 60. East wind 1 to 7 mph.

Sunday:

Mostly Sunny

Hi 81 °F

Mostly sunny, with a high near 81. Northeast wind 2 to 8 mph.

Sunday Night:

Partly Cloudy

Lo 62 °F

Partly cloudy, with a low around 62. South wind 2 to 7 mph.

Monday:

Mostly Sunny then Slight Chance Rain Showers

Hi 83 °F

A slight chance of rain showers after 3pm. Mostly sunny, with a high near 83. South wind 2 to 7 mph.

Monday Night:

Chance Rain Showers

Lo 64 °F

A chance of rain showers. Mostly cloudy, with a low around 64. South wind around 6 mph. Chance of precipitation is 30%.

Tuesday:

Chance Rain Showers

Hi 83 °F

A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. South wind 3 to 8 mph. Chance of precipitation is 50%.

Tuesday Night:

Chance Showers And T-Storms

Lo 65 °F

Tuesday Night: Chance Showers And Thunderstorms

A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. South wind around 7 mph.

FULL FORECAST

NWS Hourly Forecast -
Tonight 6pm through Fri 5am

Issued by:
National Weather Service Boston / Norton, MA
Updated Wed Jul 22, 2026 2:31pm EDT

6:00pm

Slight Chance Showers And Thunderstorms

81°F
Dew Pt 67°F
Heat Index: 83°F
Wind from W

W 9 mph
Precip: 18%
Rain: 0.01 in

7:00pm

Mostly Clear

79°F
Dew Pt 65°F
Wind from W

W 7 mph
Precip: 14%
Rain: 0.01 in

8:00pm

Partly Cloudy

76°F
Dew Pt 63°F
Wind from W

W 7 mph
Precip: 9%

9:00pm

Partly Cloudy

73°F
Dew Pt 61°F
Wind from W

W 7 mph
Precip: 5%

10:00pm

Partly Cloudy

71°F
Dew Pt 59°F
Wind from W

W 8 mph
Precip: 4%

11:00pm

Partly Cloudy

69°F
Dew Pt 58°F
Wind from W

W 8 mph
Precip: 3%

Thu
12:00am

Mostly Cloudy

67°F
Dew Pt 57°F
Wind from NW

NW 7 mph
Precip: 2%

Thu
1:00am

Mostly Cloudy

66°F
Dew Pt 56°F
Wind from NW

NW 7 mph
Precip: 0%

Thu
2:00am

Partly Cloudy

64°F
Dew Pt 56°F
Wind from NW

NW 6 mph
Precip: 0%

Thu
3:00am

Partly Cloudy

62°F
Dew Pt 55°F
Wind from NW

NW 6 mph
Precip: 0%

Thu
4:00am

Mostly Clear

61°F
Dew Pt 54°F
Wind from NW

NW 5 mph
Precip: 0%

Thu
5:00am

Mostly Clear

60°F
Dew Pt 54°F
Wind from NW

NW 6 mph
Precip: 0%

Thu
6:00am

Sunny

59°F
Dew Pt 54°F
Wind from NW

NW 6 mph
Precip: 0%

Thu
7:00am

Sunny

61°F
Dew Pt 55°F
Wind from NW

NW 6 mph
Precip: 0%

Thu
8:00am

Sunny

64°F
Dew Pt 55°F
Wind from NW

NW 7 mph
Precip: 0%

Thu
9:00am

Sunny

66°F
Dew Pt 55°F
Wind from NW

NW 7 mph
Precip: 0%

Thu
10:00am

Sunny

70°F
Dew Pt 54°F
Wind from N

N 7 mph
Precip: 0%

Thu
11:00am

Sunny

73°F
Dew Pt 53°F
Wind from N

N 6 mph
Precip: 0%

Thu
12:00pm

Sunny

76°F
Dew Pt 52°F
Wind from NW

NW 5 mph
Precip: 0%

Thu
1:00pm

Sunny

77°F
Dew Pt 52°F
Wind from NW

NW 3 mph
Precip: 0%

Thu
2:00pm

Sunny

78°F
Dew Pt 53°F
Wind from NW

NW 2 mph
Precip: 0%

Thu
3:00pm

Sunny

79°F
Dew Pt 53°F
Wind from NW

NW 1 mph
Precip: 0%

Thu
4:00pm

Sunny

79°F
Dew Pt 53°F
Wind from SE

SE 1 mph
Precip: 0%

Thu
5:00pm

Sunny

79°F
Dew Pt 52°F
Wind from SE

SE 2 mph
Precip: 0%

Thu
6:00pm

Clear

78°F
Dew Pt 53°F
Wind from SE

SE 2 mph
Precip: 0%

Thu
7:00pm

Clear

75°F
Dew Pt 55°F
Wind from SE

SE 5 mph
Precip: 0%

Thu
8:00pm

Clear

70°F
Dew Pt 56°F
Wind from SE

SE 3 mph
Precip: 0%

Thu
9:00pm

Clear

68°F
Dew Pt 56°F
Wind from SE

SE 3 mph
Precip: 0%

Thu
10:00pm

Mostly Clear

66°F
Dew Pt 56°F
Wind from S

S 3 mph
Precip: 0%

Thu
11:00pm

Clear

64°F
Dew Pt 56°F
Wind from SW

SW 2 mph
Precip: 0%

Fri
12:00am

Clear

62°F
Dew Pt 56°F
Wind from SW

SW 2 mph
Precip: 0%

Fri
1:00am

Clear

61°F
Dew Pt 56°F
Wind from SW

SW 2 mph
Precip: 0%

Fri
2:00am

Clear

59°F
Dew Pt 56°F
Wind from SW

SW 2 mph
Precip: 0%

Fri
3:00am

Clear

58°F
Dew Pt 55°F
Wind from W

W 2 mph
Precip: 0%

Fri
4:00am

Clear

57°F
Dew Pt 55°F
Wind from W

W 2 mph
Precip: 0%

Fri
5:00am

Clear

57°F
Dew Pt 54°F
Wind from W

W 2 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 221846
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
246 PM EDT Wed Jul 22 2026

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

&&

.KEY MESSAGES...

- Isolated showers and thunderstorms this afternoon. Drier
  conditions following today's cold front. 

- Mainly dry with seasonable temperatures through the weekend. 

- Rain and thunderstorm chances return for the first half of next
  week. Seasonable temperatures continue.

&&

.DISCUSSION...
KEY MESSAGE 1...Isolated showers and thunderstorms this afternoon. 
Drier conditions following today's cold front.

Satellite shows continued clearing over southern New England today, 
which has aided in the development of scattered showers and 
thunderstorms. As of the time of writing, the cold front is passing 
through western MA and CT based on latest observations towards the 
Berkshires and in north central CT. Ahead of the front, showers and 
thunderstorms have popped up across central MA, with an earlier 
round having gone through northern MA. These will continue to push 
eastward and will likely maintain their growth given the enhanced 
SBCAPE, MLCAPE, clearer skies, and warmer surface temperatures in 
the 80s with dew points climbing into the low 70s/upper 60s. Strong 
to damaging wind gusts remain a possibility given DCAPE values 
between 1000-1100 J/kg. These showers and thunderstorms should exit 
the region early tonight, generally around 8-9 PM. Some may linger a 
bit longer near the Cape and Islands, though.

As the cold front moves through the region today and tonight, winds 
will shift more NW, and drier air will move in with cooler 
temperatures. High pressure starts to build in from the west 
Thursday while an upper level trough moves over the northeast. Highs 
Thursday will reach the low to mid 80s given 925 mb temperatures 
around 16-18z. With high pressure building in, winds will slacken 
and seabreezes will likely develop tomorrow. Mostly clear skies and 
light to calm winds Thursday night will lend to radiational cooling 
as well, leading to lows dropping into the 50s.

KEY MESSAGE 2...Mainly dry with seasonable temperatures through the 
weekend. 

While the synoptic pattern will feature broad, weak troughing in the 
mid levels over the northeast, subsidence associated with a building 
surface high pressure center will keep things dry from Friday 
through at least Sunday. This, while said troughing pattern keeps 
seasonable temperatures around; 850 mb temps remain in the 11-13C 
range clear through early next week, which will lead to high 
temperatures in the upper 70s to low 80s each day. Behind today's 
cold front, dewpoints will drop into the 40s and low 50s through 
Sunday as well, making it feel less humid and more comfortable. 
Altogether this should be a fantastic stretch of weather for outdoor 
plans. 

KEY MESSAGE 3...Rain and thunderstorm chances return for the first 
half of next week. Seasonable temperatures continue. 

The pattern begins to break down around Monday with the mid level 
trough digging into the northeast with several disturbances rotating 
around the base of the trough inducing areas of surface low pressure 
which will stand the chance to bring us rain and thunderstorms as 
soon as Monday with the threat continuing much of next week. As 
mentioned previously, there is no big warm-up on the horizon.

&&

.AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
Forecaster Confidence Levels...

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

18Z Update... 

Rest of Today...Moderate confidence. 

Improvement to VFR continues this afternoon across much of the
region. IFR/MVFR may linger over the Cape and Islands a bit
longer than in other areas but should clear heading into
tonight. Isolated showers and thunderstorms remain a possibility
through this afternoon, and some are presently moving through
western MA eastward. These should remain isolated and scattered
in terms of coverage. Due to lower confidence on where exactly
these showers and storms will impact, mentions are mostly as 
PROB30s, with the exception of BDL where confidence is higher as
showers/storms were developing near the terminal at the time of
TAF issuance. SW winds 10-15 knots with gusts 20-25 kts. 

Tonight...High Confidence. 

Any afternoon SHRA/TSRA wanes after 00Z. Some SHRA may reach the
Cape and ACK later tonight after 00z, but are not expected to be
widespread. VFR. Winds shift to WNW/NW at 5-10 knots behind a 
passing cold front between 22-03Z.

Thursday...High confidence.

VFR. Winds light, mostly NNW/N. Winds may become more variable
later in the afternoon/evening inland. Seabreezes likely by 
15z-16z.

Thursday Night...High confidence.

VFR. Clearer with light to calm winds overnight, giving way to
possible radiational cooling.

KBOS Terminal...Moderate confidence in TAF. 

Lower confidence with the potential for showers/thunderstorms, 
mainly due to the isolated nature of showers/storms. Included a 
PROB30 for now to TSRA with the most likely timeframe being 
between 20-01Z.

KBDL Terminal...High confidence in TAF.

Outlook /Friday through Monday/...

Friday through Sunday Night: VFR. 

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

&&

.MARINE...
Forecaster Confidence Levels...

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

Tonight through Thursday Night

Small Craft Advisories remain in effect for SW winds 10-20 kts
with gusts 25-30 kts and 6-10 foot seas for the outer coastal 
waters and southern waters. Highest waves are expected over the 
south coastal waters. Isolated showers and thunderstorms 
possible early tonight. 

A cold front crosses the waters tonight resulting in a wind 
shift to the NW. Winds and seas will slowly decrease overnight
across the northern waters. Seas will be the slower to decrease,
especially across the southern waters. High Surf Advisory
remains in effect for exposed southern coastlines through
Thursday given the elevated seas and the higher risk for rip
currents on Thursday given receding seas and residual swell.

Seas recede to 4 ft Thursday night with light winds over the
waters.

Outlook /Friday through Monday/...

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

Saturday through Saturday Night: Winds less than 25 kt. Areas
of seas approaching 5 ft. 

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

Sunday Night through Monday: Winds less than 25 kt. Slight
chance of rain showers. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...High Surf Advisory until 8 PM EDT Thursday for MAZ020>024.
RI...High Surf Advisory until 8 PM EDT Thursday for RIZ006>008.
MARINE...Small Craft Advisory until 8 PM EDT this evening for ANZ231.
     Small Craft Advisory until 2 AM EDT Thursday for ANZ232>234-
     250.
     Small Craft Advisory until 2 PM EDT Thursday for ANZ235-237.
     Small Craft Advisory until 8 PM EDT Thursday for ANZ254>256.

&&

$$

DISCUSSION...BW/Hrencecin
AVIATION...BW/Hrencecin
MARINE...BW/Hrencecin

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