Lexington Weather

Current Conditions [‒] Current Conditions [+]

70.5°F Colder than last hour.

21.4°C

Muggy

Overcast

This Afternoon: Hi 75 °F

Tonight: Lo 61 °F

Dew Point: 62.2°F Decreased 0.6°F since last hour.

Humidity: 75%

Air Quality Index: 44

Good

(Fine Particles)

Barometer: 30.02 in S

1017 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.04 in

Rain Thursday: 0.10 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

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

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Fri Aug 21, 2026 2:48pm EDT

Overview:

- Below normal temperatures and overcast conditions continue through the weekend. Drizzle/misty weather through Saturday then a period of heavier rain possible overnight into Sunday.

- Drier and warmer next week.

This Afternoon:

Mostly Cloudy

Hi 75 °F

Mostly cloudy, with a high near 75. Northeast wind around 7 mph.

Tonight:

Mostly Cloudy then Slight Chance Rain Showers

Lo 61 °F

A slight chance of rain showers after 3am. Mostly cloudy, with a low around 61. Northeast wind around 6 mph. Chance of precipitation is 20%.

Saturday:

Chance Rain Showers

Hi 73 °F

A chance of rain showers. Cloudy, with a high near 73. Northeast wind around 8 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

Saturday Night:

Chance Rain Showers

Lo 61 °F

A chance of rain showers before 9pm, then patchy fog and a slight chance of rain showers between 9pm and 4am, then a chance of rain showers and patchy fog. Cloudy, with a low around 61. Northeast wind 1 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

Sunday:

Chance Rain Showers

Hi 78 °F

A chance of rain showers and patchy fog before 7am, then rain showers likely and patchy fog between 7am and 2pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 78. East wind around 5 mph. Chance of precipitation is 60%.

Sunday Night:

Chance Showers And T-Storms then Mostly Cloudy

Lo 63 °F

Sunday Night: Chance Showers And Thunderstorms then Mostly Cloudy

A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 63. South wind around 5 mph. Chance of precipitation is 40%.

Monday:

Sunny

Hi 82 °F

Sunny, with a high near 82. Southwest wind 3 to 9 mph.

Monday Night:

Clear

Lo 58 °F

Clear, with a low around 58. West wind 5 to 8 mph.

Tuesday:

Sunny

Hi 80 °F

Sunny, with a high near 80. West wind 5 to 9 mph.

Tuesday Night:

Mostly Clear

Lo 59 °F

Mostly clear, with a low around 59. West wind 5 to 8 mph.

Wednesday:

Sunny

Hi 82 °F

Sunny, with a high near 82. West wind 5 to 8 mph.

Wednesday Night:

Partly Cloudy

Lo 62 °F

Partly cloudy, with a low around 62. Southwest wind around 6 mph.

Thursday:

Partly Sunny then Chance Rain Showers

Hi 82 °F

A chance of rain showers after noon. Partly sunny, with a high near 82. South wind 3 to 8 mph. Chance of precipitation is 40%.

Thursday Night:

Chance Rain Showers

Lo 64 °F

A chance of rain showers. Mostly cloudy, with a low around 64. Southwest wind 3 to 7 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 5pm through Sun 4am

Issued by:
National Weather Service Boston / Norton, MA
Updated Fri Aug 21, 2026 2:48pm EDT

5:00pm

Mostly Cloudy

73°F
Dew Pt 62°F
Wind from NE

NE 7 mph
Precip: 8%

6:00pm

Mostly Cloudy

73°F
Dew Pt 62°F
Wind from NE

NE 6 mph
Precip: 7%

7:00pm

Mostly Cloudy

71°F
Dew Pt 62°F
Wind from NE

NE 5 mph
Precip: 6%

8:00pm

Mostly Cloudy

68°F
Dew Pt 61°F
Wind from NE

NE 3 mph
Precip: 9%

9:00pm

Mostly Cloudy

67°F
Dew Pt 61°F
Wind from NE

NE 3 mph
Precip: 8%

10:00pm

Mostly Cloudy

66°F
Dew Pt 61°F
Wind from NE

NE 3 mph
Precip: 9%

11:00pm

Mostly Cloudy

66°F
Dew Pt 62°F
Wind from NE

NE 3 mph
Precip: 10%

Sat
12:00am

Mostly Cloudy

65°F
Dew Pt 62°F
Wind from N

N 3 mph
Precip: 10%

Sat
1:00am

Mostly Cloudy

65°F
Dew Pt 62°F
Wind from N

N 3 mph
Precip: 10%

Sat
2:00am

Mostly Cloudy

64°F
Dew Pt 62°F
Wind from N

N 3 mph
Precip: 13%

Sat
3:00am

Slight Chance Rain Showers

63°F
Dew Pt 61°F
Wind from N

N 5 mph
Precip: 15%

Sat
4:00am

Slight Chance Rain Showers

63°F
Dew Pt 61°F
Wind from N

N 5 mph
Precip: 16%

Sat
5:00am

Slight Chance Rain Showers

63°F
Dew Pt 61°F
Wind from N

N 6 mph
Precip: 16%

Sat
6:00am

Slight Chance Rain Showers

61°F
Dew Pt 61°F
Wind from N

N 6 mph
Precip: 18%

Sat
7:00am

Slight Chance Rain Showers

62°F
Dew Pt 61°F
Wind from N

N 6 mph
Precip: 18%

Sat
8:00am

Chance Rain Showers

64°F
Dew Pt 63°F
Wind from NE

NE 6 mph
Precip: 26%

Sat
9:00am

Chance Rain Showers

66°F
Dew Pt 64°F
Wind from NE

NE 7 mph
Precip: 26%

Sat
10:00am

Chance Rain Showers

68°F
Dew Pt 65°F
Wind from NE

NE 7 mph
Precip: 27%

Sat
11:00am

Chance Rain Showers

69°F
Dew Pt 65°F
Wind from NE

NE 8 mph
Precip: 29%

Sat
12:00pm

Chance Rain Showers

70°F
Dew Pt 66°F
Wind from NE

NE 8 mph
Precip: 32%

Sat
1:00pm

Chance Rain Showers

71°F
Dew Pt 66°F
Wind from NE

NE 7 mph
Precip: 36%
Rain: 0.01 in

Sat
2:00pm

Chance Rain Showers

71°F
Dew Pt 67°F
Wind from NE

NE 7 mph
Precip: 37%

Sat
3:00pm

Chance Rain Showers

71°F
Dew Pt 67°F
Wind from NE

NE 7 mph
Precip: 35%

Sat
4:00pm

Chance Rain Showers

72°F
Dew Pt 67°F
Wind from NE

NE 7 mph
Precip: 34%

Sat
5:00pm

Chance Rain Showers

70°F
Dew Pt 66°F
Wind from NE

NE 6 mph
Precip: 32%

Sat
6:00pm

Chance Rain Showers

70°F
Dew Pt 66°F
Wind from NE

NE 5 mph
Precip: 30%

Sat
7:00pm

Slight Chance Rain Showers

69°F
Dew Pt 66°F
Wind from NE

NE 5 mph
Precip: 24%

Sat
8:00pm

Chance Rain Showers

67°F
Dew Pt 65°F
Wind from NE

NE 3 mph
Precip: 25%

Sat
9:00pm

Patchy Fog

66°F
Dew Pt 65°F
Wind from N

N 3 mph
Precip: 22%

Sat
10:00pm

Patchy Fog

66°F
Dew Pt 65°F
Wind from N

N 2 mph
Precip: 19%

Sat
11:00pm

Patchy Fog

66°F
Dew Pt 65°F
Wind from N

N 2 mph
Precip: 17%

Sun
12:00am

Patchy Fog

65°F
Dew Pt 65°F
Wind from N

N 2 mph
Precip: 13%

Sun
1:00am

Patchy Fog

64°F
Dew Pt 64°F
Wind from N

N 1 mph
Precip: 7%

Sun
2:00am

Patchy Fog

64°F
Dew Pt 64°F
Wind from N

N 1 mph
Precip: 10%

Sun
3:00am

Patchy Fog

64°F
Dew Pt 64°F
Wind from NE

NE 1 mph
Precip: 19%

Sun
4:00am

Chance Rain Showers

62°F
Dew Pt 62°F
Wind from NE

NE 2 mph
Precip: 29%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 211859
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
259 PM EDT Fri Aug 21 2026

.WHAT HAS CHANGED...
A Rip Current Statement has been issued for Plymouth and 
Barnstable Counties for Saturday.

&&

.KEY MESSAGES...

- Below normal temperatures and overcast conditions continue 
  through the weekend. Drizzle/misty weather through Saturday 
  then a period of heavier rain possible overnight into Sunday.

- Drier and warmer next week. 

&&

.DISCUSSION...
KEY MESSAGE 1...Below normal temperatures and overcast 
conditions continue through the weekend. Drizzle/misty weather 
through Saturday then a period of heavier rain possible 
overnight into Sunday.

The low pressure system that's brought the misty and overcast 
weather today has dipped a little further south of Long Island 
than previously expected. The latest guidance suite is 
projecting the low slowly moves east through today then swings 
northeast around Nantucket tonight into Saturday. The interior 
is more likely to remain dry with a few pockets of mist through 
the rest of today, but eastern and Southeast MA and RI should 
see the mist linger with periodic light showers into Saturday. 
Most of southern New England should see a dry Saturday morning, 
except the Cape/Islands could see a few lingering showers. As 
the low weakens and wraps around the Cape Saturday, another 
round of heavier showers is expected to push into southern New 
England later Saturday evening into the overnight period. This 
round has the potential to develop a few heavier, convective 
bands of rain given the higher PWATs near 2.0" and favorable 
IVT. Guidance is split a few different ways on QPF totals: 
Global ensembles show generally a 30 to 40 percent chance of
1.0" in 24 hours over the Cape/Islands by sunrise Sunday, except
the GFS ensemble which indicates much less rainfall and also
located further offshore. CAM and higher resolution guidance has
the same bullseye on the Cape, but also identifies and secondary
precip max approaching 1.0" in 24 hours across interior CT and
western MA. Given how the guidance is struggling to resolve the
exact track of the low due to the unexpected southern drop
today, confidence is on the lower end specifically regarding
rainfall across the interior, as a little wobbling east or west
in the northeastward progression of the low will have a larger
impact on precip totals.

More of the same on Sunday as a cold front slowly approaches, 
sending moisture from the south out ahead of it. NE/E flow 
early becomes southerly advecting 70+ dewpoints into the region 
with PWATs 2+ inches. This while the surface low lifts north and
east with the best convergence/forcing in the early morning 
with a lull possible in the late morning/afternoon then 
potential for some showers and thunderstorms in the afternoon. 
Given those dewpoints, CAPE values jump to 500-1000 J/kg and 
depending on how quickly the cold front arrives it could 
overcome marginal lapse rates to produce a strong to severe 
storm, especially in western SNE, given 0-6 km bulk shear values
of 50+ kts.

Otherwise, temperatures through the first half of the weekend 
will remain below seasonable under prolonged 
onshore/northeasterly flow... highs likely remain in the upper 
60s to low 70s through Saturday.

KEY MESSAGE 2...Drier and warmer next week. 

By Monday the cold front has pushed through and ushers in a 
much drier and warmer start to the week. Dewpoints fall from 
near 65-70F Sun to 45-50F Mon. Rising heights and building 
surface high pressure will help to keep the forecast drier with 
perhaps some diurnal showers Tue under a weak shortwave. 
Otherwise, generally zonal flow takes hold through at least 
Thursday with no significant disturbances on the horizon, and no
intrusions of anomalous heat or cold. Temperatures remain 
comfortable ranging from the mid 70s to low 80s.

&&

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

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

18z TAF Update: 

Through 00z Saturday: Moderate confidence. 

BKN/OVC VFR ceilings (bases 035-045) generally govern, though 
MVFR/IFR ceilings more common for southeast MA and RI airports. 
Intervals of mist/drizzle possible at BOS to PVD, but with off- 
and-on light showers for the Cape and Islands. NE winds around 
5-10 kt, around 10-15 kt for the eastern airports. 

Tonight into Saturday: Moderate confidence. 

IFR for southeast MA but ceilings should deteriorate down to 
MVFR-IFR levels tonight and overnight northward to BOS, BED and 
ORH. Intervals of mist and drizzle at 4-6 SM. BDL should stay 
BKN VFR most of the night. Conditions should then generally hold
steady into Sat daytime hrs. N to NE winds 5-10 kt.

Saturday Night: Moderate confidence. 

Conditions to turn to widespread MVFR-IFR with a round of 
steadier light to moderate rain after approximately 06z Sunday; 
timing is uncertain and subject to further adjustment. NE to N 
winds 5-10 kt. 

KBOS Terminal...Moderate confidence in TAF. Mainly OVC VFR 
ceilings today with NE winds around 10 kt, with off-and-on mist 
and drizzle. Categories more likely to deteriorate to sub-VFR 
ceilings with 4-6 SM BR/DZ tonight.

KBDL Terminal...High confidence in TAF. Stronger confidence in 
prevailing VFR and relatively drier weather.

Outlook /Sunday through Wednesday/...

Sunday: Mainly VFR, with local IFR possible. Chance SHRA,
slight chance TSRA.

Sunday Night: VFR. 

Monday: VFR. Breezy. 

Monday Night: VFR. 

Tuesday through Wednesday: VFR. Breezy. 

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Saturday Night...High confidence.

Gusty NE winds near 25kts and waves near 5 ft across the 
southern waters gradually diminish through this evening and into
tonight as the low weakens and moves further offshore. 
Otherwise, winds generally 18-20 kts and seas 3-4 ft through 
most of Saturday become more variable as the low breaks down 
Saturday night into Sunday morning.

Despite the lower wave heights, the prolonged northeasterly 
flow will cause higher swells and longer swell periods Saturday
which has prompted a Rip Current Statement for Plymouth and 
Barnstable Counties. Eastern, ocean-facing beaches will be 
primarily affected, especially across the northern portion of 
Cape Cod; however, bay- facing beaches may also experience rip 
currents.

Outlook /Sunday through Wednesday/...

Sunday: Winds less than 25 kt. Seas locally approaching 5 ft.
Chance of rain showers, slight chance of thunderstorms. 

Sunday Night: Winds less than 25 kt. Local rough seas. Chance
of rain showers, slight chance of thunderstorms. 

Monday through Monday Night: Winds less than 25 kt. Seas up to
5 ft. 

Tuesday through Wednesday: Winds less than 25 kt. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...High Risk for Rip Currents from Saturday morning through Saturday 
     afternoon for MAZ019-022.
RI...None.
MARINE...Small Craft Advisory until 6 PM EDT this evening for ANZ235-
     237-256.

&&

$$

DISCUSSION...BW/McMinn
AVIATION...Loconto
MARINE...McMinn

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