Lexington Weather

Current Conditions [‒] Current Conditions [+]

66.6°F Colder than last hour.

19.2°C

Comfortable

Clear

Tonight: Lo 60 °F

Wednesday: Hi 80 °F

Dew Point: 60.3°F

Humidity: 80% Increased 3.0% since last hour.

Barometer: 29.92 in S

1013 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Tuesday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

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

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Tue Aug 25, 2026 6:34pm EDT

Overview:

- Mostly quiet through Wednesday night.

- A round or two of scattered showers & thunderstorms possible Thu afternoon into Fri along with summerlike humidity as well.

- Mainly dry and seasonable weather follows for the weekend. Temps may trend above normal early next week.

Tonight:

Mostly Clear

Lo 60 °F

Mostly clear, with a low around 60. West wind around 5 mph.

Wednesday:

Mostly Sunny

Hi 80 °F

Mostly sunny, with a high near 80. West wind 3 to 7 mph.

Wednesday Night:

Partly Cloudy then Patchy Fog

Lo 61 °F

Patchy fog after 1am. Partly cloudy, with a low around 61. South wind 2 to 7 mph.

Thursday:

Patchy Fog then Chance Rain Showers

Hi 83 °F

Patchy fog before 8am, then a chance of rain showers. Mostly sunny, with a high near 83. Southwest wind 3 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

Thursday Night:

Chance Rain Showers

Lo 70 °F

A chance of rain showers before 2am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 70. South wind 5 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

Friday:

Showers And T-Storms Likely

Hi 83 °F

Friday: Showers And Thunderstorms Likely

A chance of rain showers before 11am, then showers and thunderstorms likely. Mostly cloudy, with a high near 83. Southwest wind around 6 mph. Chance of precipitation is 70%.

Friday Night:

Showers And T-Storms Likely then Mostly Cloudy

Lo 60 °F

Friday Night: Showers And Thunderstorms Likely then Mostly Cloudy

Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms between 7pm and 10pm. Mostly cloudy, with a low around 60. West wind around 5 mph. Chance of precipitation is 60%.

Saturday:

Mostly Sunny

Hi 80 °F

Mostly sunny, with a high near 80. Northwest wind around 5 mph.

Saturday Night:

Partly Cloudy

Lo 56 °F

Partly cloudy, with a low around 56. Southwest wind around 5 mph.

Sunday:

Sunny

Hi 83 °F

Sunny, with a high near 83. West wind 2 to 6 mph.

Sunday Night:

Partly Cloudy

Lo 63 °F

Partly cloudy, with a low around 63. Southwest wind around 6 mph.

Monday:

Mostly Sunny

Hi 83 °F

Mostly sunny, with a high near 83. West wind 5 to 8 mph.

Monday Night:

Slight Chance Rain Showers

Lo 65 °F

A slight chance of rain showers between 8pm and 4am. Partly cloudy, with a low around 65. Southwest wind around 7 mph.

Tuesday:

Partly Sunny then Chance Rain Showers

Hi 82 °F

A chance of rain showers after 1pm. Partly sunny, with a high near 82. West wind 5 to 8 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 12am through Thu 11am

Issued by:
National Weather Service Boston / Norton, MA
Updated Tue Aug 25, 2026 6:34pm EDT

12:00am

Mostly Clear

64°F
Dew Pt 59°F
Wind from W

W 3 mph
Precip: 1%

1:00am

Clear

63°F
Dew Pt 58°F
Wind from W

W 3 mph
Precip: 0%

2:00am

Clear

63°F
Dew Pt 58°F
Wind from W

W 2 mph
Precip: 0%

3:00am

Clear

62°F
Dew Pt 58°F
Wind from W

W 2 mph
Precip: 0%

4:00am

Clear

61°F
Dew Pt 58°F
Wind from NW

NW 2 mph
Precip: 0%

5:00am

Clear

61°F
Dew Pt 57°F
Wind from NW

NW 2 mph
Precip: 0%

6:00am

Sunny

62°F
Dew Pt 57°F
Wind from NW

NW 3 mph
Precip: 0%

7:00am

Sunny

63°F
Dew Pt 58°F
Wind from NW

NW 3 mph
Precip: 0%

8:00am

Sunny

66°F
Dew Pt 59°F
Wind from NW

NW 5 mph
Precip: 0%

9:00am

Sunny

69°F
Dew Pt 60°F
Wind from NW

NW 5 mph
Precip: 0%

10:00am

Sunny

72°F
Dew Pt 60°F
Wind from NW

NW 3 mph
Precip: 0%

11:00am

Sunny

74°F
Dew Pt 59°F
Wind from NW

NW 3 mph
Precip: 0%

12:00pm

Mostly Sunny

76°F
Dew Pt 59°F
Wind from NW

NW 3 mph
Precip: 0%

1:00pm

Mostly Sunny

78°F
Dew Pt 59°F
Wind from W

W 3 mph
Precip: 0%

2:00pm

Partly Sunny

79°F
Dew Pt 59°F
Wind from W

W 3 mph
Precip: 0%

3:00pm

Partly Sunny

80°F
Dew Pt 58°F
Heat Index: 81°F
Wind from SW

SW 5 mph
Precip: 0%

4:00pm

Partly Sunny

80°F
Dew Pt 58°F
Heat Index: 81°F
Wind from S

S 6 mph
Precip: 0%

5:00pm

Partly Sunny

79°F
Dew Pt 59°F
Wind from SE

SE 7 mph
Precip: 0%

6:00pm

Mostly Cloudy

76°F
Dew Pt 59°F
Wind from SE

SE 7 mph
Precip: 0%

7:00pm

Partly Cloudy

73°F
Dew Pt 60°F
Wind from SE

SE 7 mph
Precip: 0%

8:00pm

Partly Cloudy

70°F
Dew Pt 60°F
Wind from SE

SE 6 mph
Precip: 0%

9:00pm

Partly Cloudy

68°F
Dew Pt 61°F
Wind from SE

SE 6 mph
Precip: 0%

10:00pm

Mostly Cloudy

66°F
Dew Pt 60°F
Wind from S

S 5 mph
Precip: 0%

11:00pm

Mostly Cloudy

65°F
Dew Pt 62°F
Wind from S

S 3 mph
Precip: 0%

Thu
12:00am

Mostly Cloudy

65°F
Dew Pt 61°F
Wind from S

S 3 mph
Precip: 0%

Thu
1:00am

Patchy Fog

64°F
Dew Pt 61°F
Wind from S

S 3 mph
Precip: 0%

Thu
2:00am

Patchy Fog

63°F
Dew Pt 61°F
Wind from S

S 3 mph
Precip: 0%

Thu
3:00am

Patchy Fog

62°F
Dew Pt 61°F
Wind from S

S 3 mph
Precip: 0%

Thu
4:00am

Patchy Fog

61°F
Dew Pt 61°F
Wind from S

S 2 mph
Precip: 0%

Thu
5:00am

Patchy Fog

61°F
Dew Pt 61°F
Wind from S

S 2 mph
Precip: 0%

Thu
6:00am

Patchy Fog

61°F
Dew Pt 61°F
Wind from S

S 3 mph
Precip: 0%

Thu
7:00am

Patchy Fog

63°F
Dew Pt 62°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
8:00am

Mostly Sunny

66°F
Dew Pt 64°F
Wind from SW

SW 5 mph
Precip: 1%

Thu
9:00am

Sunny

71°F
Dew Pt 65°F
Wind from SW

SW 6 mph
Precip: 1%

Thu
10:00am

Sunny

75°F
Dew Pt 66°F
Wind from S

S 7 mph
Precip: 1%

Thu
11:00am

Mostly Sunny

79°F
Dew Pt 66°F
Wind from S

S 8 mph
Precip: 1%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 252316
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
716 PM EDT Tue Aug 25 2026

.WHAT HAS CHANGED...

No significant changes to the forecast.

&&

.KEY MESSAGES...

- Mostly quiet through Wednesday night.

- A round or two of scattered showers & thunderstorms possible Thu 
  afternoon into Fri along with summerlike humidity as well.

- Mainly dry and seasonable weather follows for the weekend.
  Temps may trend above normal early next week.

&&


.DISCUSSION...

KEY MESSAGE 1...Mostly quiet through Wednesday night. 

Surface high pressure continues to influence southern New England's 
weather as it builds in from the Ohio valley this afternoon. Even 
so, a lingering mid level trough/cold pool aloft is leading to a 
smattering of diurnal cumulus and hit-and-miss showers over 
western/central areas. With sunset these showers will 
dissipate and cloudcover quickly recede. Tonight expect clear skies 
with light winds and patchy fog in the interior where dewpoint 
depressions may be near 0. Wednesday is dry and sunny with mid level 
ridging building in. As this happens, the low/mid level flow backs 
to the SW 850mb temps bump up from ~11C to 12-13C pushing high 
temperatures a few degrees warmer on Wednesday, into the upper 
70s/low 80s with cooler temps along the coast. 

KEY MESSAGE 2...A round or two of scattered showers & thunderstorms 
possible Thu afternoon into Fri along with summerlike humidity as well.

The model guidance is in fairly good agreement in an approaching 
shortwave trough/cold front late in the work week. Out ahead of this 
disturbance...S-SW flow will result in the return of low level 
moisture and summerlike humidity. While specific timing remains 
uncertain...the potential exists for a round or two of scattered 
showers and thunderstorms sometime Thu afternoon/night into Fri. The 
CSU machine learning probabilities also indicate a low risk for 
severe weather/heavy rainfall. That is basically climatology for an 
approaching shortwave this time of year. But the question remains 
does the forcing/instability lineup favorably for that potential to 
be realized along with various mesoscale processes. It is just too 
early to determine that at this time. Nonetheless...certainly 
something to watch over the next day or two.

KEY MESSAGE 3...Mainly dry and seasonable weather follows for the 
weekend. Temps may trend above normal early next week. 

High pressure builds in behind the departing shortwave/cold front 
for the upcoming weekend. The result will be mainly dry and 
seasonable weather Sat into Sun. Ensembles indicating upper level 
flow may become more westerly early next week allowing for temps to 
trend above normal.

&&

.AVIATION /00Z WEDNESDAY THROUGH SUNDAY/...

Forecaster Confidence Levels...

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

00z TAF Update...

Tonight...High confidence. 

VFR. Calm/Light WNW winds. Brief localized patchy ground fog 
possible late in the typically prone locations. 

Wednesday...High confidence.

VFR. Light W-SW winds with local seabreezes developing along
portions of the very immediate coast.

Wednesday night...High confidence. 

VFR. Calm/light SW winds. Patchy ground fog possible late in
the typically prone locations. 

KBOS Terminal...High confidence in TAF. Sea breeze will develop
in the 14z/15z time frame on Wednesday. 

KBDL Terminal...High confidence in TAF.

Outlook /Thursday through Sunday/...

Thursday: Mainly VFR, with local MVFR possible. Breezy. Chance
SHRA, slight chance TSRA.

Thursday Night: Mainly VFR, with local IFR possible. Breezy.
Chance SHRA, slight chance TSRA.

Friday: VFR. Chance SHRA, chance TSRA.

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

Saturday through Sunday: VFR.

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Wednesday night...High confidence.

Fairly quiet boating conditions through the first half of this 
week as high pressure develops across the Midwest before 
expanding toward the waters off the coast of southern New 
England. Gusty southwest flow develops today, with gusts around
20 kt. Conditions improve overnight into early Wednesday 
morning as winds shift to the northwest.

Outlook /Thursday through Sunday/...

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

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

Friday: Winds less than 25 kt. Seas up to 5 ft. Chance of rain
showers, slight chance of thunderstorms. 

Friday Night: Winds less than 25 kt. Seas up to 5 ft. Slight
chance of rain showers, slight chance of thunderstorms. 

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

Saturday Night through Sunday: Winds less than 25 kt.

&&

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

&&

$$

DISCUSSION...BW/Frank
AVIATION...Frank
MARINE...BW/Frank

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