Lexington Weather

Current Conditions [‒] Current Conditions [+]

66.6°F Colder than last hour.

19.2°C

Muggy

Clear

Overnight: Lo 64 °F

Wednesday: Hi 85 °F

Dew Point: 62.2°F Decreased 0.8°F since last hour.

Humidity: 86%

Air Quality Index: 41

Good

(Fine Particles)

Barometer: 29.71 in S

1006 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 -
Overnight, Wednesday, & Wednesday Night through Tuesday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Wed Aug 12, 2026 2:30am EDT

Overview:

- A generally unsettled pattern persists through Friday as a quasi-stationary front remains across the Northeast, resulting in multiple opportunities for showers and thunderstorms. While coverage should remain limited through Thursday, stronger forcing Friday may bring a better chance for showers and thunderstorms before drier weather arrives for the weekend.

- Temperatures trend toward seasonable levels through the end of the week, with lower humidity and more comfortable conditions expected this weekend.

Overnight:

Partly Cloudy

Lo 64 °F

Partly cloudy, with a low around 64. Northwest wind around 3 mph.

Wednesday:

Sunny

Hi 85 °F

Sunny, with a high near 85. Northwest wind around 6 mph.

Wednesday Night:

Partly Cloudy

Lo 64 °F

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

Thursday:

Mostly Sunny then Chance Showers And T-Storms

Hi 84 °F

Thursday: Mostly Sunny then Chance Showers And Thunderstorms

A chance of showers and thunderstorms between 2pm and 3pm, then a slight chance of showers and thunderstorms between 3pm and 5pm. Mostly sunny, with a high near 84. West wind 3 to 7 mph. Chance of precipitation is 30%.

Thursday Night:

Partly Cloudy

Lo 63 °F

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

Friday:

Mostly Sunny then Chance Rain Showers

Hi 83 °F

A chance of rain showers after 3pm. Mostly sunny, with a high near 83. Northwest wind 5 to 8 mph. Chance of precipitation is 30%.

Friday Night:

Slight Chance Rain Showers then Mostly Clear

Lo 59 °F

A slight chance of rain showers before 8pm. Mostly clear, with a low around 59. Northwest wind around 7 mph.

Saturday:

Sunny

Hi 82 °F

Sunny, with a high near 82. Northwest wind around 6 mph.

Saturday Night:

Mostly Clear

Lo 59 °F

Mostly clear, with a low around 59. Northwest wind around 5 mph.

Sunday:

Mostly Sunny then Chance Rain Showers

Hi 83 °F

A chance of rain showers after 3pm. Mostly sunny, with a high near 83. West wind 2 to 7 mph. Chance of precipitation is 30%.

Sunday Night:

Rain Showers Likely

Lo 63 °F

Rain showers likely before 2am, then showers and thunderstorms likely. Mostly cloudy, with a low around 63. South wind around 7 mph. Chance of precipitation is 60%.

Monday:

Chance Showers And T-Storms

Hi 79 °F

Monday: Chance Showers And Thunderstorms

A chance of showers and thunderstorms. Partly sunny, with a high near 79. West wind around 8 mph. Chance of precipitation is 50%.

Monday Night:

Chance Showers And T-Storms then Partly Cloudy

Lo 61 °F

Monday Night: Chance Showers And Thunderstorms then Partly Cloudy

A chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 61. Northwest wind around 6 mph. Chance of precipitation is 30%.

Tuesday:

Sunny

Hi 82 °F

Sunny, with a high near 82. Northwest wind around 6 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 5am through Thu 4pm

Issued by:
National Weather Service Boston / Norton, MA
Updated Wed Aug 12, 2026 2:30am EDT

5:00am

Partly Cloudy

65°F
Dew Pt 58°F
Wind from NW

NW 3 mph
Precip: 2%

6:00am

Sunny

64°F
Dew Pt 58°F
Wind from NW

NW 3 mph
Precip: 3%

7:00am

Sunny

66°F
Dew Pt 59°F
Wind from NW

NW 3 mph
Precip: 3%

8:00am

Sunny

70°F
Dew Pt 60°F
Wind from NW

NW 3 mph
Precip: 4%

9:00am

Sunny

73°F
Dew Pt 60°F
Wind from N

N 3 mph
Precip: 3%

10:00am

Sunny

78°F
Dew Pt 60°F
Wind from NW

NW 5 mph
Precip: 3%

11:00am

Sunny

80°F
Dew Pt 59°F
Heat Index: 81°F
Wind from NW

NW 5 mph
Precip: 2%

12:00pm

Sunny

81°F
Dew Pt 59°F
Wind from NW

NW 5 mph
Precip: 2%

1:00pm

Sunny

83°F
Dew Pt 58°F
Wind from NW

NW 5 mph
Precip: 2%

2:00pm

Sunny

84°F
Dew Pt 58°F
Wind from NW

NW 5 mph
Precip: 3%

3:00pm

Mostly Sunny

84°F
Dew Pt 58°F
Wind from NW

NW 6 mph
Precip: 2%

4:00pm

Mostly Sunny

84°F
Dew Pt 58°F
Wind from NW

NW 6 mph
Precip: 2%

5:00pm

Mostly Sunny

85°F
Dew Pt 59°F
Wind from W

W 5 mph
Precip: 2%

6:00pm

Partly Cloudy

83°F
Dew Pt 59°F
Wind from W

W 5 mph
Precip: 3%

7:00pm

Partly Cloudy

80°F
Dew Pt 59°F
Heat Index: 81°F
Wind from SW

SW 3 mph
Precip: 4%

8:00pm

Partly Cloudy

79°F
Dew Pt 59°F
Wind from SW

SW 3 mph
Precip: 4%

9:00pm

Mostly Clear

74°F
Dew Pt 60°F
Wind from S

S 3 mph
Precip: 4%

10:00pm

Mostly Clear

73°F
Dew Pt 60°F
Wind from S

S 3 mph
Precip: 3%

11:00pm

Partly Cloudy

71°F
Dew Pt 60°F
Wind from SW

SW 3 mph
Precip: 6%

Thu
12:00am

Partly Cloudy

70°F
Dew Pt 61°F
Wind from SW

SW 3 mph
Precip: 8%

Thu
1:00am

Partly Cloudy

69°F
Dew Pt 61°F
Wind from SW

SW 3 mph
Precip: 10%

Thu
2:00am

Partly Cloudy

68°F
Dew Pt 61°F
Wind from W

W 3 mph
Precip: 12%

Thu
3:00am

Partly Cloudy

66°F
Dew Pt 61°F
Wind from W

W 3 mph
Precip: 12%

Thu
4:00am

Partly Cloudy

66°F
Dew Pt 61°F
Wind from W

W 3 mph
Precip: 14%

Thu
5:00am

Partly Cloudy

66°F
Dew Pt 61°F
Wind from W

W 3 mph
Precip: 13%

Thu
6:00am

Mostly Sunny

64°F
Dew Pt 61°F
Wind from W

W 3 mph
Precip: 10%

Thu
7:00am

Mostly Sunny

66°F
Dew Pt 62°F
Wind from W

W 3 mph
Precip: 10%

Thu
8:00am

Partly Sunny

68°F
Dew Pt 64°F
Wind from W

W 3 mph
Precip: 10%

Thu
9:00am

Mostly Sunny

71°F
Dew Pt 65°F
Wind from W

W 3 mph
Precip: 6%

Thu
10:00am

Mostly Sunny

75°F
Dew Pt 65°F
Wind from W

W 5 mph
Precip: 6%

Thu
11:00am

Sunny

77°F
Dew Pt 65°F
Wind from W

W 5 mph
Precip: 10%

Thu
12:00pm

Mostly Sunny

79°F
Dew Pt 66°F
Wind from W

W 5 mph
Precip: 9%

Thu
1:00pm

Sunny

80°F
Dew Pt 65°F
Heat Index: 82°F
Wind from W

W 6 mph
Precip: 12%

Thu
2:00pm

Chance Showers And Thunderstorms

82°F
Dew Pt 66°F
Heat Index: 84°F
Wind from W

W 6 mph
Precip: 28%

Thu
3:00pm

Slight Chance Showers And Thunderstorms

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

W 7 mph
Precip: 18%

Thu
4:00pm

Slight Chance Showers And Thunderstorms

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

W 7 mph
Precip: 15%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 120610
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
210 AM EDT Wed Aug 12 2026

.WHAT HAS CHANGED...
Later frontal passage Friday brings increased shower and 
thunderstorm potential.

&&

.KEY MESSAGES...

- A generally unsettled pattern persists through Friday as a
  quasi-stationary front remains across the Northeast, 
  resulting in multiple opportunities for showers and 
  thunderstorms. While coverage should remain limited through 
  Thursday, stronger forcing Friday may bring a better chance 
  for showers and thunderstorms before drier weather arrives for
  the weekend.

- Temperatures trend toward seasonable levels through the end of
  the week, with lower humidity and more comfortable conditions
  expected this weekend.

&&

.DISCUSSION...
KEY MESSAGE 1...A generally unsettled pattern persists through 
Friday as a quasi-stationary front remains across the Northeast, 
resulting in multiple opportunities for showers and thunderstorms. 
While coverage should remain limited through Thursday, stronger 
forcing Friday may bring a better chance for showers and 
thunderstorms before drier weather arrives for the weekend.

A mid-level ridge remains anchored across the south-central and 
southeastern CONUS, while a weaker ridge extends into the Canadian 
Prairies. This leaves the flow aloft relatively quasi-zonal, 
allowing shortwave energy to quickly traverse the continent into the 
northeast. Given the lack of strong synoptic-scale forcing, shower 
development and coverage will remain difficult to pin down through 
Thursday.

Today will be mainly dry, with a weak surface low passing south of 
New England. The highest PoPs, generally 10-20 percent, will be 
confined to the immediate south coast and Islands during the 
morning. Otherwise, a mix of sun and clouds is expected, although 
another surge of wildfire smoke may result in hazy or milky skies. A 
mid-level shortwave trough will move through tonight into Thursday 
morning, providing enough forcing for scattered showers and a few 
thunderstorms. Coverage should remain limited, however, with PoPs 
generally in the 20-30 percent range northwest of I-95 and I-495. 
Thursday features a weak disturbance passing through the flow, with 
similar PoPs once again across the eastern half of southern New 
England.  

A more notable change arrives Friday as the front's departure has 
trended later. A stronger 500 mb shortwave trough and increasing 
forcing will bring a better chance for showers and thunderstorms, 
particularly as the front finally pushes offshore. Behind the front, 
high pressure builds into the region for Saturday and Sunday, 
bringing a much drier airmass along with mostly sunny and 
comfortable conditions. The next opportunity for more substantial 
rainfall arrives late Sunday into Monday as low pressure approaches 
from the northern Great Lakes.

KEY MESSAGE 2...Temperatures trend toward seasonable levels through 
the end of the week, with lower humidity and more comfortable 
conditions expected this weekend.

Temperatures aloft gradually cool through the end of the week, with 
dew points following suit. The result will be a noticeably cooler 
and more refreshing airmass by late week. The weekend is shaping up 
to be the most comfortable stretch of weather in quite some time, 
with highs generally in the upper 70s across interior southern New 
England and lower 80s along the coastal plain. Dew points in the 50s 
will make for much more comfortable conditions, while overnight lows 
fall into the 50s Saturday and Sunday mornings. Temperatures early 
next week remain seasonable, though dew points may trend upward on 
Monday depending on the timing of the next frontal system.

&&

.AVIATION /06Z WEDNESDAY THROUGH SUNDAY/...
Forecaster Confidence Levels...

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

06z TAF Update:

Today...High confidence.

VFR. Light N/NW winds. Easterly sea breezes develop at east coast 
terminals between 14z and 18Z. There is a low chance (10-20%) for a 
few showers along the immediate south coast and Cape/Islands from 
08z and 12Z, with the highest chances across the Islands, 
particularly KACK. Otherwise, dry conditions are expected at other 
terminals.

Tonight...High confidence.

VFR, trending toward lower-end VFR/MVFR after 06z to 08Z, with an 
isolated shower possible. SW winds less than 5 kt to calm across the 
interior.

Thursday...Moderate confidence.

Lower-end VFR to MVFR ceilings to start, improving to VFR (CIGs 050-
080) during the afternoon. SW to WSW winds around 10 kt.

KBOS Terminal...High confidence.

Sea breeze arrives around 15-16Z. Wildfire smoke aloft possible.

KBDL Terminal...High confidence.

Wildfire smoke aloft possible.

Outlook /Thursday Night through Sunday/...

Thursday Night: VFR. Slight chance SHRA.

Friday through Friday Night: VFR. Breezy. 

Saturday through Saturday Night: VFR. 

Sunday: Mainly VFR, with local IFR possible. Breezy. Slight
chance SHRA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Thursday...High confidence.

Today, localized sea breezes may develop near shore, while offshore 
winds remain SW to SSE at less than 10 kt. Somewhat stronger SW to 
SSW winds are expected Thursday, with gusts around 20 kt. Seas will 
remain below 3 ft throughout the forecast period.

Outlook /Thursday Night through Sunday/...

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

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

Friday Night through 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.

&&

$$
Dooley

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