Lexington Weather

Current Conditions [‒] Current Conditions [+]

63.0°F Colder than last hour.

17.2°C

Comfortable

Clear

This Afternoon: Hi 68 °F

Tonight: Lo 45 °F

Dew Point: 51.4°F Decreased 0.9°F since last hour.

Humidity: 66% Increased 3.0% since last hour.

Air Quality Index: 26

Good

(Fine Particles)

Barometer: 30.22 in S

1023 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Friday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
This Afternoon, Tonight, & Sunday through Friday Night

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sat Oct 3, 2026 2:29pm EDT

Overview:

- Beautiful and refreshing fall weather continues into Sunday, though clouds increase during the afternoon. Showers arrive late Sunday afternoon/evening and become widespread Sunday night, potentially lingering into the Monday morning commute.

- Sharp temperature drop expected for the start of the week, then a return to dry, fall-like conditions with seasonable temperatures.

This Afternoon:

Sunny

Hi 68 °F

Sunny, with a high near 68. Northeast wind around 7 mph.

Tonight:

Mostly Clear

Lo 45 °F

Mostly clear, with a low around 45. Northeast wind 2 to 6 mph.

Sunday:

Mostly Sunny then Slight Chance Rain Showers

Hi 62 °F

A slight chance of rain showers after 5pm. Mostly sunny, with a high near 62. Northeast wind 5 to 9 mph. Chance of precipitation is 20%.

Sunday Night:

Chance Rain Showers

Lo 51 °F

A chance of rain showers before 5am. Mostly cloudy, with a low around 51. North wind 1 to 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

Monday:

Mostly Sunny

Hi 68 °F

Mostly sunny, with a high near 68. West wind 2 to 13 mph, with gusts as high as 25 mph.

Monday Night:

Clear

Lo 42 °F

Clear, with a low around 42. West wind 8 to 12 mph, with gusts as high as 22 mph.

Tuesday:

Sunny

Hi 58 °F

Sunny, with a high near 58. West wind 7 to 10 mph, with gusts as high as 22 mph.

Tuesday Night:

Clear

Lo 39 °F

Clear, with a low around 39. West wind 2 to 6 mph.

Wednesday:

Sunny

Hi 64 °F

Sunny, with a high near 64. Southwest wind 2 to 8 mph.

Wednesday Night:

Mostly Clear

Lo 48 °F

Mostly clear, with a low around 48. Southwest wind around 8 mph.

Thursday:

Sunny

Hi 70 °F

Sunny, with a high near 70. Southwest wind around 9 mph.

Thursday Night:

Mostly Clear

Lo 48 °F

Mostly clear, with a low around 48. West wind around 6 mph.

Friday:

Sunny

Hi 68 °F

Sunny, with a high near 68. West wind 5 to 10 mph.

Friday Night:

Mostly Clear

Lo 48 °F

Mostly clear, with a low around 48. West wind around 8 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 5pm through Mon 4am

Issued by:
National Weather Service Boston / Norton, MA
Updated Sat Oct 3, 2026 2:29pm EDT

5:00pm

Sunny

64°F
Dew Pt 48°F
Wind from E

E 7 mph
Precip: 0%

6:00pm

Clear

61°F
Dew Pt 48°F
Wind from E

E 6 mph
Precip: 0%

7:00pm

Clear

58°F
Dew Pt 48°F
Wind from E

E 6 mph
Precip: 0%

8:00pm

Clear

55°F
Dew Pt 48°F
Wind from E

E 5 mph
Precip: 0%

9:00pm

Clear

54°F
Dew Pt 49°F
Wind from E

E 3 mph
Precip: 0%

10:00pm

Mostly Clear

52°F
Dew Pt 49°F
Wind from E

E 3 mph
Precip: 0%

11:00pm

Mostly Clear

51°F
Dew Pt 48°F
Wind from NE

NE 3 mph
Precip: 0%

Sun
12:00am

Mostly Clear

50°F
Dew Pt 48°F
Wind from NE

NE 2 mph
Precip: 0%

Sun
1:00am

Mostly Clear

49°F
Dew Pt 48°F
Wind Chill: 48°F
Wind from NE

NE 3 mph
Precip: 0%

Sun
2:00am

Mostly Clear

48°F
Dew Pt 47°F
Wind Chill: 47°F
Wind from NE

NE 3 mph
Precip: 0%

Sun
3:00am

Mostly Clear

48°F
Dew Pt 47°F
Wind Chill: 46°F
Wind from N

N 5 mph
Precip: 0%

Sun
4:00am

Partly Cloudy

47°F
Dew Pt 46°F
Wind Chill: 45°F
Wind from N

N 5 mph
Precip: 0%

Sun
5:00am

Partly Cloudy

47°F
Dew Pt 45°F
Wind Chill: 45°F
Wind from N

N 5 mph
Precip: 0%

Sun
6:00am

Mostly Sunny

46°F
Dew Pt 45°F
Wind Chill: 44°F
Wind from N

N 5 mph
Precip: 0%

Sun
7:00am

Mostly Sunny

46°F
Dew Pt 46°F
Wind Chill: 44°F
Wind from N

N 5 mph
Precip: 0%

Sun
8:00am

Sunny

48°F
Dew Pt 48°F
Wind Chill: 46°F
Wind from NE

NE 5 mph
Precip: 0%

Sun
9:00am

Sunny

52°F
Dew Pt 50°F
Wind from E

E 6 mph
Precip: 0%

Sun
10:00am

Mostly Sunny

56°F
Dew Pt 51°F
Wind from E

E 7 mph
Precip: 0%

Sun
11:00am

Sunny

60°F
Dew Pt 50°F
Wind from E

E 9 mph
Precip: 0%

Sun
12:00pm

Sunny

62°F
Dew Pt 50°F
Wind from E

E 8 mph
Precip: 2%

Sun
1:00pm

Mostly Sunny

62°F
Dew Pt 50°F
Wind from E

E 8 mph
Precip: 3%

Sun
2:00pm

Partly Sunny

62°F
Dew Pt 50°F
Wind from E

E 9 mph
Precip: 4%

Sun
3:00pm

Partly Sunny

62°F
Dew Pt 50°F
Wind from E

E 8 mph
Precip: 9%

Sun
4:00pm

Mostly Cloudy

61°F
Dew Pt 50°F
Wind from E

E 8 mph
Precip: 13%

Sun
5:00pm

Slight Chance Rain Showers

62°F
Dew Pt 51°F
Wind from E

E 7 mph
Precip: 17%

Sun
6:00pm

Slight Chance Rain Showers

60°F
Dew Pt 51°F
Wind from E

E 7 mph
Precip: 22%

Sun
7:00pm

Chance Rain Showers

59°F
Dew Pt 52°F
Wind from E

E 6 mph
Precip: 28%

Sun
8:00pm

Chance Rain Showers

57°F
Dew Pt 53°F
Wind from E

E 3 mph
Precip: 33%
Rain: 0.01 in

Sun
9:00pm

Chance Rain Showers

55°F
Dew Pt 53°F
Wind from E

E 2 mph
Precip: 32%
Rain: 0.01 in

Sun
10:00pm

Chance Rain Showers

54°F
Dew Pt 53°F
Wind from NE

NE 2 mph
Precip: 32%
Rain: 0.01 in

Sun
11:00pm

Chance Rain Showers

53°F
Dew Pt 53°F
Wind from NE

NE 1 mph
Precip: 31%
Rain: 0.01 in

Mon
12:00am

Chance Rain Showers

53°F
Dew Pt 53°F
Wind from N

N 1 mph
Precip: 27%

Mon
1:00am

Slight Chance Rain Showers

52°F
Dew Pt 52°F
Wind from N

N 1 mph
Precip: 22%

Mon
2:00am

Slight Chance Rain Showers

52°F
Dew Pt 52°F
Wind from NW

NW 1 mph
Precip: 18%

Mon
3:00am

Slight Chance Rain Showers

52°F
Dew Pt 52°F
Wind from NW

NW 1 mph
Precip: 16%

Mon
4:00am

Slight Chance Rain Showers

52°F
Dew Pt 52°F
Wind from NW

NW 2 mph
Precip: 15%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 031919
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
319 PM EDT Sat Oct 3 2026

.WHAT HAS CHANGED...
No significant changes to the forecast.

&&

.KEY MESSAGES...

- Beautiful and refreshing fall weather continues into Sunday, 
  though clouds increase during the afternoon. Showers arrive 
  late Sunday afternoon/evening and become widespread Sunday 
  night, potentially lingering into the Monday morning commute.

- Sharp temperature drop expected for the start of the week,
  then a return to dry, fall-like conditions with seasonable
  temperatures.

&&

.DISCUSSION...
KEY MESSAGE 1...Beautiful and refreshing fall weather continues into 
Sunday, though clouds increase during the afternoon. Showers arrive 
late Sunday afternoon/evening and become widespread Sunday night, 
potentially lingering into the Monday morning commute.

WOW. B-E-A-U-tiful conditions this afternoon! A true fall airmass 
has settled over southern New England, and what a notable difference 
from the lower 80s and dewpoints in the 60s yesterday afternoon. 
Refreshing! 925mb temperatures have settled around +10C, resulting 
in highs in the 60s this afternoon along with dewpoints in the 40s. 
For tonight, high pressure remains in control with mainly clear 
skies. Winds do not fully decouple, though still expect some 
radiational cooling with lows dipping well into the 40s. Not out of 
the question for a few upper 30s across the Berkshires.

High pressure transits northern New England on Sunday, leading to 
another quiet start to the day. Clouds will thicken from southwest 
to northeast by early afternoon ahead of a weak surface low 
developing off the Mid-Atlantic coast. Temperatures aloft are a 
touch cooler, with 925mb temperatures around +8C. Thus, expect highs 
a few degrees cooler than this afternoon, generally in the lower 
60s, with more clouds than sun during the afternoon. Sunday is not a 
washout. Based on the 12z suite of CAMs, showers could arrive as 
early as 3-5 PM, especially across western and southern portions of 
the region. However, the better chance for more widespread rainfall 
comes after 7 PM and continues through the overnight into early 
Monday morning.

Highest confidence in appreciable rainfall is across areas closest 
to the south coast, Cape Cod and Islands. Heavy rainfall is 
unlikely, as most convective elements should remain well south of 
Nantucket overnight Sunday into Monday morning. That being said, 
cannot rule out embedded thunder with showers south of Nantucket. 
The HREF does pick up on this potential, though probabilities remain 
low at less than 20 percent. How much rainfall? Generally a few 
hundredths to around a tenth of an inch for many, with totals of one 
to two tenths favored south of Route 44. Amounts could approach a 
quarter of an inch across Nantucket.

Rain should begin wrapping up during the Monday morning hours, 
though timing could result in a wet ride to school and work for at 
least portions of southern New England. Otherwise, no significant 
wind concerns with this system as easterly winds develop while the 
weak low passes nearby Sunday night.

KEY MESSAGE 2...Sharp temperature drop expected for the start of the 
week, then a return to dry, fall-like conditions with seasonable 
temperatures.

A deep Canadian low to our north tracks eastward heading into 
the start of next week with strong high pressure tracking just 
behind it, building in over the start of the week. Associated 
with this deep low, much cooler air is injected in across New 
England. 12z guidance continued to flirt with the possibility of
bringing the 540dam line closer to southern New England, but at
this time, it generally remains across Maine and New Hampshire 
with the latest run. 925 mb temperatures early Tuesday 
morning/late Monday night may sink to around 0C, then only climb
to around 5C in the afternoon hours Tuesday into Tuesday night.
This profile will be more supportive of highs barely making it 
to 60F and lows dipping into the 30s, especially Tuesday night 
with this cold air and diminishing winds.

The low continues eastward and the flow aloft then shifts more SW 
behind it, extending through the lower levels as well. High pressure 
at the surface exits towards Thursday with another high just behind 
it building in towards the Great Lakes. With the return of SW flow 
and drier conditions, more seasonable temperatures take hold for the 
back half of the week; 925 mb temperatures climb back to around 10C, 
supporting highs generally in the 60s, approaching 70F towards 
Thursday and Friday.

&&

.AVIATION /19Z SATURDAY THROUGH THURSDAY/...
Forecaster Confidence Levels...

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

18z TAF Update...

This Afternoon and Tonight...High confidence.

VFR. E winds this afternoon 8-12 kt, becoming ENE at less than 6 kt 
overnight.

Sunday and Sunday Night...High confidence in trends, moderate 
confidence in timing of showers.

VFR through much of Sunday with increasing mid-level clouds. 
Ceilings lower to MVFR from southwest to northeast between 22z-02z. 
Showers become more widespread Sunday evening and overnight, 
reducing visibilities to 3-5SM at times. Ceilings lower to MVFR/IFR 
overnight into early Monday morning.

KBOS Terminal...High confidence in TAF. 

KBDL Terminal...High confidence in TAF.

Outlook /Monday through Thursday/...

Monday through Tuesday: VFR. Breezy. 

Tuesday Night: VFR. 

Wednesday: VFR. Breezy. 

Wednesday Night through Thursday: VFR. 

&&

.MARINE...
Forecaster Confidence Levels...

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

This Afternoon through Sunday Night...High confidence.

Quiet conditions for the rest of Saturday and the first half of 
Sunday. High pressure located near the Great Lakes tracks east-
northeast across northern New England Sunday as weak low pressure 
develops near the Mid-Atlantic coast Sunday afternoon, then tracks 
northeast toward southern New England Sunday night.

Seas are generally 2-4 feet through much of Sunday, though build to 
5+ feet across the outer waters Sunday night. East to northeast 
winds are generally 10-15 knots, with gusts increasing to 20-25 
knots Sunday night. There is the potential need for a Small Craft 
Advisory Sunday night into early Monday morning. As conditions 
remain marginal, held off on issuance for now, though an advisory 
will be considered in upcoming forecasts.

Outlook /Monday through Thursday/...

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

Monday Night: Moderate risk for Small Craft Advisory winds with
gusts up to 30 kt. Seas up to 5 ft. 

Tuesday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Seas up to 5 ft. 

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

Wednesday through Thursday: Winds less than 25 kt. 

&&

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

&&

$$

DISCUSSION...Dooley/Hrencecin
AVIATION...Dooley/Hrencecin
MARINE...Dooley/Hrencecin

CLOSE