Lexington Weather

Current Conditions [‒] Current Conditions [+]

80.1°F Colder than last hour.

26.7°C

Feels like 82.8°F

Hot

Partly cloudy

This Afternoon: Hi 85 °F

Tonight: Lo 55 °F

Dew Point: 68.5°F Decreased 0.8°F since last hour.

Humidity: 68% Increased 2.0% since last hour.

Air Quality Index: 55

Moderate

(Fine Particles)

Barometer: 29.76 in Rising 0.04 inHg/hr

1008 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Thursday: 0.06 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 1 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 Oct 2, 2026 3:36pm EDT

Overview:

- Scattered showers this afternoon and tonight. Brief gusty winds or a rumble of thunder possible. Mainly dry and cooler Saturday.

- A strong cold front brings a chance for scattered showers Sunday followed by much cooler temperatures for the first week of October.

This Afternoon:

Chance Rain Showers

Hi 85 °F

A chance of rain showers. Partly sunny. High near 85, with temperatures falling to around 77 in the afternoon. West wind around 13 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

Tonight:

Chance Rain Showers then Mostly Cloudy

Lo 55 °F

A chance of rain showers before midnight. Mostly cloudy, with a low around 55. Northwest wind 6 to 12 mph, with gusts as high as 23 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

Saturday:

Sunny

Hi 69 °F

Sunny, with a high near 69. North wind around 6 mph.

Saturday Night:

Mostly Clear then Patchy Fog

Lo 46 °F

Patchy fog after 2am. Mostly clear, with a low around 46. Northeast wind 0 to 3 mph.

Sunday:

Patchy Fog then Partly Sunny

Hi 63 °F

Patchy fog before 9am. Partly sunny, with a high near 63. Northeast wind 3 to 8 mph.

Sunday Night:

Chance Rain Showers

Lo 50 °F

A chance of rain showers after 8pm. Mostly cloudy, with a low around 50. South wind 1 to 5 mph. Chance of precipitation is 30%.

Monday:

Chance Rain Showers then Mostly Sunny

Hi 68 °F

A chance of rain showers before 8am. Mostly sunny, with a high near 68. West wind 2 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.

Monday Night:

Mostly Clear

Lo 42 °F

Mostly clear, with a low around 42. West wind around 10 mph.

Tuesday:

Sunny

Hi 59 °F

Sunny, with a high near 59. West wind around 10 mph, with gusts as high as 22 mph.

Tuesday Night:

Clear

Lo 39 °F

Clear, with a low around 39. West wind 3 to 7 mph.

Wednesday:

Sunny

Hi 62 °F

Sunny, with a high near 62. West wind around 6 mph.

Wednesday Night:

Mostly Clear

Lo 45 °F

Mostly clear, with a low around 45. Southwest wind around 6 mph.

Thursday:

Sunny

Hi 67 °F

Sunny, with a high near 67. Southwest wind 6 to 9 mph.

Thursday Night:

Mostly Clear

Lo 49 °F

Mostly clear, with a low around 49. Southwest wind around 7 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 5pm through Sun 4am

Issued by:
National Weather Service Boston / Norton, MA
Updated Fri Oct 2, 2026 3:36pm EDT

5:00pm

Chance Rain Showers

77°F
Dew Pt 67°F
Wind from W

W 13 mph
Precip: 35%
Rain: 0.01 in

6:00pm

Chance Rain Showers

75°F
Dew Pt 66°F
Wind from W

W 12 mph
Precip: 30%
Rain: 0.01 in

7:00pm

Chance Rain Showers

73°F
Dew Pt 64°F
Wind from NW

NW 9 mph
Precip: 25%
Rain: 0.01 in

8:00pm

Mostly Cloudy

71°F
Dew Pt 63°F
Wind from NW

NW 8 mph
Precip: 21%

9:00pm

Slight Chance Rain Showers

69°F
Dew Pt 62°F
Wind from NW

NW 8 mph
Precip: 19%

10:00pm

Slight Chance Rain Showers

67°F
Dew Pt 61°F
Wind from NW

NW 8 mph
Precip: 17%

11:00pm

Slight Chance Rain Showers

66°F
Dew Pt 60°F
Wind from NW

NW 7 mph
Precip: 16%

Sat
12:00am

Cloudy

65°F
Dew Pt 58°F
Wind from N

N 8 mph
Precip: 11%

Sat
1:00am

Mostly Cloudy

64°F
Dew Pt 55°F
Wind from N

N 7 mph
Precip: 7%

Sat
2:00am

Mostly Cloudy

63°F
Dew Pt 54°F
Wind from NW

NW 6 mph
Precip: 3%

Sat
3:00am

Mostly Cloudy

61°F
Dew Pt 53°F
Wind from N

N 6 mph
Precip: 2%

Sat
4:00am

Mostly Clear

59°F
Dew Pt 51°F
Wind from N

N 6 mph
Precip: 1%

Sat
5:00am

Mostly Clear

58°F
Dew Pt 50°F
Wind from N

N 6 mph
Precip: 0%

Sat
6:00am

Sunny

57°F
Dew Pt 50°F
Wind from N

N 6 mph
Precip: 0%

Sat
7:00am

Sunny

55°F
Dew Pt 49°F
Wind from N

N 6 mph
Precip: 0%

Sat
8:00am

Sunny

56°F
Dew Pt 50°F
Wind from N

N 6 mph
Precip: 0%

Sat
9:00am

Sunny

59°F
Dew Pt 51°F
Wind from N

N 6 mph
Precip: 0%

Sat
10:00am

Sunny

62°F
Dew Pt 51°F
Wind from N

N 6 mph
Precip: 0%

Sat
11:00am

Sunny

64°F
Dew Pt 50°F
Wind from N

N 6 mph
Precip: 0%

Sat
12:00pm

Sunny

66°F
Dew Pt 49°F
Wind from N

N 6 mph
Precip: 0%

Sat
1:00pm

Sunny

67°F
Dew Pt 48°F
Wind from N

N 5 mph
Precip: 0%

Sat
2:00pm

Sunny

67°F
Dew Pt 48°F
Wind from N

N 5 mph
Precip: 0%

Sat
3:00pm

Sunny

67°F
Dew Pt 47°F
Wind from N

N 5 mph
Precip: 0%

Sat
4:00pm

Sunny

66°F
Dew Pt 48°F
Wind from NE

NE 5 mph
Precip: 0%

Sat
5:00pm

Sunny

65°F
Dew Pt 48°F
Wind from NE

NE 5 mph
Precip: 0%

Sat
6:00pm

Mostly Clear

62°F
Dew Pt 48°F
Wind from E

E 3 mph
Precip: 0%

Sat
7:00pm

Clear

59°F
Dew Pt 48°F
Wind from E

E 3 mph
Precip: 0%

Sat
8:00pm

Clear

56°F
Dew Pt 48°F
Wind from E

E 2 mph
Precip: 0%

Sat
9:00pm

Clear

55°F
Dew Pt 48°F
Wind from E

E 2 mph
Precip: 0%

Sat
10:00pm

Clear

53°F
Dew Pt 48°F
Wind from E

E 1 mph
Precip: 0%

Sat
11:00pm

Mostly Clear

52°F
Dew Pt 48°F
Wind from

0 mph
Precip: 0%

Sun
12:00am

Mostly Clear

50°F
Dew Pt 48°F
Wind from NE

NE 1 mph
Precip: 0%

Sun
1:00am

Mostly Clear

49°F
Dew Pt 47°F
Wind from NE

NE 1 mph
Precip: 0%

Sun
2:00am

Patchy Fog

48°F
Dew Pt 47°F
Wind from N

N 2 mph
Precip: 0%

Sun
3:00am

Patchy Fog

48°F
Dew Pt 46°F
Wind from N

N 2 mph
Precip: 0%

Sun
4:00am

Patchy Fog

48°F
Dew Pt 46°F
Wind from N

N 2 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 021952
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
352 PM EDT Fri Oct 2 2026

.WHAT HAS CHANGED...
A Small Craft Advisory remains in effect for the southern 
waters through this evening for gusty winds and elevated seas. 
Otherwise, the forecast remains on track.

&&

.KEY MESSAGES...

- Scattered showers this afternoon and tonight. Brief gusty
  winds or a rumble of thunder possible. Mainly dry and cooler
  Saturday. 

- A strong cold front brings a chance for scattered showers
  Sunday followed by much cooler temperatures for the first week
  of October. 

&&

.DISCUSSION...
KEY MESSAGE 1...Scattered showers this afternoon and tonight. 
Brief gusty winds or a rumble of thunder possible. Mainly dry 
and cooler Saturday. 

Day Cloud Phase satellite imagery and radar this afternoon show
shower development increasing in coverage across portions of
southern New England. This activity will continue to expand and
push eastward into the early evening along and ahead of a
gradually advancing cold front. 

Recent SPC mesoanalysis highlights an environment conducive to
convective elements with PWATs near 1.6", marginal instability,
and steep low level lapse rates. The well mixed boundary layer
has contributed to an axis of elevated DCAPE values around 1000
J/kg extending from east CT to a portion of east MA. Given this
set-up, expect scattered convective showers this evening. A few
showers may be capable of a rumble of thunder, brief downpour,
and localized gusty winds. Although not expecting severe
criteria. 

The front and associated showers will slowly push through
tonight. Showers exit most areas by midnight, with the exception
of southeast MA and the Cape/Islands where showers may linger
through around 5 AM. Skies clear behind the departing showers
Saturday morning with post-frontal winds out of the northwest.
Colder air advects in post-front for Saturday with 850 mb
temperatures +4-6C. This will yield a more fall-like day with
temperatures in the mid to upper 60s for most of the southern
New England. As surface high pressure shifts east, flow weakens
and shift to the east across the eastern coastal areas. Onshore
may keep temperatures in those areas locked in the low to mid
60s. 

Radiational cooling should optimize cooling Saturday night given
the clear skies with lows dropping in the 40s for the interior
and low 50s near the coast. The typical radiator spots and
higher terrain could drop into the upper 30s. 


KEY MESSAGE 2...A strong cold front brings a chance for scattered 
showers Sunday followed by much cooler temperatures for the first 
week of October. 

Shower chances Sunday have come into better focus with the latest 
guidance showing a band of anomalously high PWATs advecting poleward 
along and ahead of a strong cold front Sunday night into Monday 
morning. While most guidance has shifted towards more widespread 
showers the fly in the ointment for this forecast is the depth and 
extent of a layer of dry air (RH <35%). More widespread dry air 
aloft may serve to help keep the showers more scattered in nature as 
instead of a broad shield of rainfall that some global guidance is 
depicting. 

Will see strong CAA behind the front later Monday into Tuesday as 
the parent low deepens over the Canadian Maritimes. Ensemble 
guidance shows a 30-50% chance of the low deepening >980mb which is 
an increase from previous runs. A deeper low would bring stronger CAA 
and thus colder 850 mb temps. At present, guidance shows the 0C 
isotherm making it as far south as coastal MA and CT by Tuesday 
morning. These cold mid-level temperatures likely translate to highs 
in the mid and lower 50s Tuesday and Wednesday. More notably, low 
temps likely fall into the 30s Monday and Tuesday night. Monday 
night should see the <40 degree readings limited to northern MA and 
the higher elevations of eastern CT as the boundary layer stays 
better mixed. More widespread 30-40 degree readings arrive Tuesday 
night as the center of continental high pressure crests over the 
region resulting in calm winds and clear skies. Thus, the best 
chance of the season's first widespread frost/freeze should arrive 
Tuesday night. 

The high then pushes east by Thursday, marking the return of 
predominantly southwest flow and seasonable temperature to southern 
New England for the end of the week.

&&

.AVIATION /19Z FRIDAY THROUGH WEDNESDAY/...
Forecaster Confidence Levels...

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

12z TAF Update: 

Today: High confidence in TAF/trends but moderate on timing. 

Mainly VFR, with SW winds around 8-12 kt with occasional gusts
to 20 kts and up to 25 kts for east coast and Cape terminals.  

- SHRA approaches TAF sites between 19-03z from west to east with
 brief period of MVFR visby/cigs within any SHRA. While not
 zero, the risk for TS is low (< 20%) and predominantly should
 be SHRA. Winds shift behind the front from SW to W/WNW this
 evening. Could see a brief gust 20 kts with the frontal
 passage.

Tonight: High confidence. 

VFR for most, with patchy MVFR possible for Cape Cod and Islands
overnight. Another "wave" of -SHRA is possible for portions of
eastern southern New England tonight. This is more likely to
impact PVD and Cape/Island terminals, but could push as north as
BOS 00 to approx 04Z. -SHRA move offshore the Cape and Islands 
by 10z Sat. NW to N winds increase to around 10 kt, especially 
around/after midnight. Ceilings gradually increase 06-12Z. 

Saturday and Saturday Night: High confidence. 

VFR. N winds around 10 kt to start Saturday, though decrease to
around 5-10 kt by afternoon, with ENE/E winds for the eastern 
MA coast. SCT mid-level decks possible. N/NNE winds continue
overnight. 

KBOS Terminal...High confidence in TAF/trends but moderate on
timing. Thinking SHRA begins around 20-22z, with embedded 
heavier SHRA and MVFR visby between 21-23z. Added in a PROB30
for -SHRA 00-04Z as some additional showers may push near BOS in
that timeframe. Winds shift to the NW 22-00Z with the frontal
passage this evening. 

KBDL Terminal...High confidence in TAF. Thinking SHRA begins 
around 19z, with embedded heavier SHRA and MVFR visby between 
20-22z.

Outlook /Sunday through Wednesday/...

Sunday: VFR. 

Sunday Night: Mainly VFR, with local MVFR possible. Chance
SHRA.

Monday through Tuesday: VFR. Breezy. 

Tuesday Night through Wednesday: VFR. 

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Sunday...High confidence.

A cold front approaches the southern New England coastal waters
this evening. Ahead of the front, southwest flow will bring 
gusts of 20-25 knots across the southern nearshore waters, 
including Cape Cod Bay, with marginal seas of 5-6 feet across 
the southern outer waters. A few showers and an isolated 
thunderstorm are possible with the frontal passage this evening.
Winds shift to the NW/N behind the front this evening into
tonight. High pressure briefly returns Saturday with tranquil 
boating conditions.

Outlook /Sunday through Wednesday/...

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

Monday: Winds less than 25 kt. Seas up to 5 ft. Slight chance
of rain showers. 

Monday Night: Moderate risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft. 

Tuesday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Local rough seas. 

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

Wednesday: Winds less than 25 kt. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 8 PM EDT this evening for 
     ANZ230>237-251.
     Small Craft Advisory until 2 AM EDT Saturday for ANZ254>256.

&&

$$

DISCUSSION...Mensch/FT
AVIATION...Mensch
MARINE...Mensch/FT

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