Lexington Weather

Current Conditions [‒] Current Conditions [+]

81.0°F Colder than last hour.

27.2°C

Feels like 84°F

Hot

Clear

Tonight: Lo 69 °F

Tuesday: Hi 88 °F

Dew Point: 68.9°F Increased 1.6°F since last hour .

Humidity: 67% Increased 5.0% since last hour.

Air Quality Index: 40

Good

(Fine Particles)

Barometer: 29.81 in S

1009 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Sunday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 1 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

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

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Mon Aug 10, 2026 5:25pm EDT

Overview:

- Above normal temperatures and humidity continues through Tuesday. Relief from the heat & humidity comes late week and especially this weekend.

- Unsettled weather continues this week with shower and thunderstorms chances returning this evening as well as Wednesday night/Thursday morning.

Tonight:

Partly Cloudy

Lo 69 °F

Partly cloudy, with a low around 69. Southwest wind around 6 mph.

Tuesday:

Sunny

Hi 88 °F

Sunny, with a high near 88. West wind 6 to 10 mph.

Tuesday Night:

Partly Cloudy

Lo 64 °F

Partly cloudy, with a low around 64. West wind 3 to 8 mph.

Wednesday:

Sunny

Hi 86 °F

Sunny, with a high near 86. Northwest wind around 5 mph.

Wednesday Night:

Partly Cloudy

Lo 64 °F

Partly cloudy, with a low around 64. West wind around 5 mph.

Thursday:

Chance Rain Showers

Hi 85 °F

A chance of rain showers after 8am. Partly sunny, with a high near 85. West wind 3 to 9 mph. Chance of precipitation is 50%.

Thursday Night:

Chance Rain Showers

Lo 63 °F

A chance of rain showers. Mostly cloudy, with a low around 63. West wind 5 to 8 mph. Chance of precipitation is 40%.

Friday:

Slight Chance Rain Showers then Mostly Sunny

Hi 81 °F

A slight chance of rain showers before 9am. Mostly sunny, with a high near 81. Northwest wind 6 to 10 mph, with gusts as high as 21 mph.

Friday Night:

Mostly Clear

Lo 58 °F

Mostly clear, with a low around 58. Northwest wind around 9 mph.

Saturday:

Sunny

Hi 81 °F

Sunny, with a high near 81. Northwest wind around 8 mph.

Saturday Night:

Mostly Clear

Lo 57 °F

Mostly clear, with a low around 57. Northwest wind around 6 mph.

Sunday:

Mostly Sunny then Slight Chance Rain Showers

Hi 81 °F

A slight chance of rain showers after 5pm. Mostly sunny, with a high near 81. Southwest wind 2 to 6 mph.

Sunday Night:

Chance Rain Showers

Lo 61 °F

A chance of rain showers. Mostly cloudy, with a low around 61. South wind around 6 mph. Chance of precipitation is 40%.

Monday:

Chance Rain Showers

Hi 80 °F

A chance of rain showers. Partly sunny, with a high near 80. West wind 5 to 8 mph.

FULL FORECAST

NWS Hourly Forecast -
Tonight 6pm through Wed 5am

Issued by:
National Weather Service Boston / Norton, MA
Updated Mon Aug 10, 2026 5:25pm EDT

6:00pm

Partly Cloudy

86°F
Dew Pt 63°F
Heat Index: 87°F
Wind from SW

SW 6 mph
Precip: 1%

7:00pm

Partly Cloudy

84°F
Dew Pt 64°F
Heat Index: 85°F
Wind from SW

SW 5 mph
Precip: 1%

8:00pm

Mostly Cloudy

82°F
Dew Pt 63°F
Heat Index: 83°F
Wind from SW

SW 5 mph
Precip: 4%

9:00pm

Mostly Cloudy

78°F
Dew Pt 64°F
Wind from SW

SW 5 mph
Precip: 5%

10:00pm

Mostly Cloudy

77°F
Dew Pt 65°F
Wind from SW

SW 5 mph
Precip: 8%

11:00pm

Mostly Cloudy

76°F
Dew Pt 65°F
Wind from SW

SW 5 mph
Precip: 11%

Tue
12:00am

Mostly Cloudy

76°F
Dew Pt 65°F
Wind from SW

SW 5 mph
Precip: 11%

Tue
1:00am

Partly Cloudy

75°F
Dew Pt 66°F
Wind from SW

SW 5 mph
Precip: 11%

Tue
2:00am

Partly Cloudy

74°F
Dew Pt 66°F
Wind from SW

SW 5 mph
Precip: 9%

Tue
3:00am

Mostly Clear

72°F
Dew Pt 66°F
Wind from W

W 5 mph
Precip: 7%

Tue
4:00am

Mostly Clear

71°F
Dew Pt 66°F
Wind from W

W 5 mph
Precip: 5%

Tue
5:00am

Mostly Clear

71°F
Dew Pt 66°F
Wind from W

W 5 mph
Precip: 3%

Tue
6:00am

Sunny

70°F
Dew Pt 66°F
Wind from W

W 6 mph
Precip: 1%

Tue
7:00am

Sunny

72°F
Dew Pt 66°F
Wind from W

W 6 mph
Precip: 0%

Tue
8:00am

Sunny

74°F
Dew Pt 67°F
Wind from W

W 7 mph
Precip: 0%

Tue
9:00am

Sunny

76°F
Dew Pt 67°F
Wind from W

W 7 mph
Precip: 0%

Tue
10:00am

Sunny

81°F
Dew Pt 66°F
Heat Index: 83°F
Wind from W

W 8 mph
Precip: 0%

Tue
11:00am

Mostly Sunny

83°F
Dew Pt 65°F
Heat Index: 85°F
Wind from W

W 9 mph
Precip: 0%

Tue
12:00pm

Sunny

85°F
Dew Pt 64°F
Heat Index: 86°F
Wind from W

W 9 mph
Precip: 0%

Tue
1:00pm

Sunny

86°F
Dew Pt 63°F
Heat Index: 87°F
Wind from NW

NW 9 mph
Precip: 0%

Tue
2:00pm

Sunny

86°F
Dew Pt 62°F
Wind from W

W 9 mph
Precip: 0%

Tue
3:00pm

Mostly Sunny

87°F
Dew Pt 61°F
Wind from W

W 10 mph
Precip: 0%

Tue
4:00pm

Mostly Sunny

87°F
Dew Pt 61°F
Wind from W

W 9 mph
Precip: 0%

Tue
5:00pm

Mostly Sunny

87°F
Dew Pt 60°F
Wind from W

W 9 mph
Precip: 0%

Tue
6:00pm

Mostly Clear

86°F
Dew Pt 59°F
Wind from W

W 8 mph
Precip: 0%

Tue
7:00pm

Partly Cloudy

83°F
Dew Pt 59°F
Wind from W

W 7 mph
Precip: 0%

Tue
8:00pm

Partly Cloudy

81°F
Dew Pt 59°F
Wind from W

W 6 mph
Precip: 0%

Tue
9:00pm

Partly Cloudy

77°F
Dew Pt 59°F
Wind from W

W 5 mph
Precip: 0%

Tue
10:00pm

Mostly Clear

75°F
Dew Pt 59°F
Wind from NW

NW 5 mph
Precip: 0%

Tue
11:00pm

Mostly Clear

74°F
Dew Pt 58°F
Wind from NW

NW 3 mph
Precip: 0%

Wed
12:00am

Partly Cloudy

73°F
Dew Pt 58°F
Wind from NW

NW 3 mph
Precip: 0%

Wed
1:00am

Partly Cloudy

71°F
Dew Pt 58°F
Wind from W

W 3 mph
Precip: 0%

Wed
2:00am

Partly Cloudy

70°F
Dew Pt 58°F
Wind from NW

NW 3 mph
Precip: 0%

Wed
3:00am

Partly Cloudy

68°F
Dew Pt 58°F
Wind from NW

NW 3 mph
Precip: 0%

Wed
4:00am

Partly Cloudy

67°F
Dew Pt 57°F
Wind from NW

NW 3 mph
Precip: 0%

Wed
5:00am

Partly Cloudy

66°F
Dew Pt 57°F
Wind from NW

NW 3 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 101847
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
247 PM EDT Mon Aug 10 2026

.WHAT HAS CHANGED...
Forecast remains on track.

&&

.KEY MESSAGES...

- Above normal temperatures and humidity continues through
  Tuesday. Relief from the heat & humidity comes late week and
  especially this weekend. 

- Unsettled weather continues this week with shower and 
thunderstorms chances returning this evening as well as Wednesday 
night/Thursday morning.


&&

.DISCUSSION...

KEY MESSAGE 1...Above normal temperatures and humidity 
continues through Tuesday. Relief from the heat & humidity comes
late week and especially this weekend. 

A bit of a persistence temperature forecast to start the week as the 
pattern is overall pretty zonal. Model soundings indicate mixing up 
to near 850 mb where temperatures are/will be hovering around 16C 
resulting in highs in the upper 80s, perhaps touching 90s in the 
warmest spots today and Tuesday. We'll then see a gradual cooling 
down through the work week and especially by the weekend. 850 mb 
temps drop to near 13C by mid week leading to highs in the upper 70s 
(high elevations) to mid 80s. The weekend, though, looks quite 
comfortable as dewpoints which will be elevated at times through the 
week but never oppressive, really drop by the weekend into the upper 
40s to low 50s! This leads to the chance for some cooler nights in 
the 50s while afternoon temps may not make it out of the 70s for 
many locations. 

KEY MESSAGE 2...Unsettled weather continues this week with shower 
and thunderstorms chances returning this evening, as well as 
some time from late Wednesday night into Thursday night.

Looking at a rather narrow time window for thunderstorms this 
afternoon, pretty much from 5-9 PM. Most-unstable CAPE values peak 
about 750-1,100 J/kg during this time, then quickly diminish after 
sunset. There is just not enough synoptic forcing to maintain it 
much longer. While a few thunderstorms are possible after sunset, 
they should be weakening as they move across southern New England, 
especially by the time they reach eastern MA. Anticipating the 
majority of the stronger convection over PA and NY state to remain 
mainly to our south and west. Will continue to monitor this though 
as it could remain somewhat as potent moving into the CT River 
valley.

Tuesday and Wednesday should remain dry and mostly sunny with more 
comfortable humidity.

Complicated forecast from late Wednesday night into Thursday night. 
Expecting a frontal boundary to meander across southern New England. 
Thus, the timing is not well known. This front should provide a 
trigger for some showers at times, but it should not be a washout. A 
high pressure should finally get close enough on Friday to push this 
front offshore, and return drier and cooler weather into early next 
week.

&&

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

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

18z TAF Update: 

This afternoon: Generally high confidence, but moderate 
confidence on timing/probability of TSRA. 

VFR with hazy skies from high level smoke possible. Winds SW 
5-10 kts. SHRA/TSRA look to develop late in the day, starting as
soon as 21z at BDL with the higher risk after 23Z. Confidence 
decreases in TSRA as the activity moves E/ESE toward ORH and 
further east terminals (00-05Z). 

Tonight: High confidence. 

VFR. Sea breeze at BOS kicks out 23-01Z with winds shifting to
SW. SW winds 5-10 kts shift to WSW/W overnight. 

Tuesday: High confidence. 

VFR. NW winds 10-15 kts. 

Tuesday night:High confidence. 

VFR. Winds light and variable. 

KBOS Terminal...Moderate confidence in TAF. 
Low probability for a SHRA/TSRA after 01-06Z. Too low to 
include in TAF at this time. 

KBDL Terminal...Moderate confidence in TAF. Wildfire smoke aloft possible.
Potential for scattered SHRA or a TSRA after 21z, but moreso
after 23Z. If any storms develop, a stronger storm is possible 
with gusty winds, frequent lighting, and brief IFR visbys.

Outlook /Tuesday Night through Saturday/...

Wednesday through Wednesday Night: VFR. 

Thursday: VFR. Breezy. Chance SHRA.

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

Friday through Friday Night: VFR. Breezy. 

Saturday: VFR. 

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Tuesday night... High Confidence.

Winds becoming SW 10-15 kts. Becoming W after 06z. Local sea 
breezes along the east coast of MA Monday. Seas 1 to 3 feet. 

Outlook /Wednesday through Saturday/...

Wednesday through Wednesday Night: Winds less than 25 kt. 

Thursday: Winds less than 25 kt. Seas locally approaching 5 ft.
Slight chance of rain showers. 

Thursday Night: Winds less than 25 kt. Areas of seas
approaching 5 ft. Chance of rain showers. 

Friday: Winds less than 25 kt. Areas of seas approaching 5 ft.
Slight chance of rain showers. 

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

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

&&

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

&&

$$

DISCUSSION...Belk/BW
AVIATION...Belk/BW
MARINE...Belk/BW

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