Lexington Weather

Current Conditions [‒] Current Conditions [+]

66.0°F Colder than last hour.

18.9°C

Muggy

Overcast

Overnight: Lo 66 °F

Friday: Hi 78 °F

Dew Point: 64.2°F Decreased 0.6°F since last hour.

Humidity: 94%

Air Quality Index: 26

Good

(Ozone)

Barometer: 29.97 in S

1015 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Thursday: 0.04 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Overnight, Friday, & Friday Night through Thursday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Fri Sep 18, 2026 3:02am EDT

Overview:

- Shower chances into Friday morning, followed by drier conditions Friday.

- Drier conditions Friday and Saturday.

- Next chance for rain Sunday into Monday. There remains uncertainty in the details such as coverage, timing, amounts. Showers may linger through early next week.

Overnight:

Patchy Fog

Lo 66 °F

Patchy fog and a slight chance of rain showers. Mostly cloudy, with a low around 66. West wind around 5 mph. Chance of precipitation is 20%.

Friday:

Patchy Fog then Sunny

Hi 78 °F

Patchy fog before 8am. Sunny, with a high near 78. Northwest wind 5 to 8 mph.

Friday Night:

Partly Cloudy

Lo 49 °F

Partly cloudy, with a low around 49. North wind 5 to 8 mph.

Saturday:

Mostly Sunny

Hi 66 °F

Mostly sunny, with a high near 66. Northeast wind around 5 mph.

Saturday Night:

Partly Cloudy

Lo 48 °F

Partly cloudy, with a low around 48. Southeast wind around 5 mph.

Sunday:

Rain Showers Likely

Hi 65 °F

Rain showers likely after 11am. Mostly cloudy, with a high near 65. Southeast wind 2 to 6 mph. Chance of precipitation is 60%.

Sunday Night:

Rain Showers Likely

Lo 54 °F

Rain showers likely before 9pm, then rain showers likely and patchy fog. Mostly cloudy, with a low around 54. Northeast wind around 5 mph. Chance of precipitation is 70%.

Monday:

Chance Rain Showers

Hi 65 °F

A chance of rain showers. Partly sunny, with a high near 65. Northeast wind around 8 mph. Chance of precipitation is 30%.

Monday Night:

Chance Rain Showers

Lo 51 °F

A chance of rain showers. Mostly cloudy, with a low around 51. Northeast wind 3 to 8 mph. Chance of precipitation is 30%.

Tuesday:

Chance Rain Showers

Hi 60 °F

A chance of rain showers. Mostly cloudy, with a high near 60. Northeast wind 8 to 12 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

Tuesday Night:

Chance Rain Showers then Mostly Cloudy

Lo 50 °F

A chance of rain showers before 10pm. Mostly cloudy, with a low around 50. Northeast wind 7 to 10 mph. Chance of precipitation is 30%.

Wednesday:

Partly Sunny then Slight Chance Rain Showers

Hi 61 °F

A slight chance of rain showers after 5pm. Partly sunny, with a high near 61. Northeast wind 10 to 14 mph, with gusts as high as 29 mph.

Wednesday Night:

Slight Chance Rain Showers

Lo 49 °F

A slight chance of rain showers. Mostly cloudy, with a low around 49. Northeast wind 7 to 12 mph, with gusts as high as 22 mph.

Thursday:

Chance Rain Showers

Hi 62 °F

A chance of rain showers. Partly sunny, with a high near 62. Northeast wind around 12 mph, with gusts as high as 24 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 4am through Sat 3pm

Issued by:
National Weather Service Boston / Norton, MA
Updated Fri Sep 18, 2026 3:02am EDT

4:00am

Patchy Fog

68°F
Dew Pt 66°F
Wind from NW

NW 5 mph
Precip: 10%

5:00am

Patchy Fog

67°F
Dew Pt 66°F
Wind from NW

NW 5 mph
Precip: 2%

6:00am

Patchy Fog

67°F
Dew Pt 65°F
Wind from NW

NW 5 mph
Precip: 2%

7:00am

Patchy Fog

66°F
Dew Pt 65°F
Wind from NW

NW 5 mph
Precip: 2%

8:00am

Sunny

67°F
Dew Pt 65°F
Wind from NW

NW 6 mph
Precip: 2%

9:00am

Sunny

69°F
Dew Pt 65°F
Wind from NW

NW 7 mph
Precip: 0%

10:00am

Sunny

71°F
Dew Pt 63°F
Wind from NW

NW 8 mph
Precip: 0%

11:00am

Sunny

72°F
Dew Pt 61°F
Wind from N

N 8 mph
Precip: 0%

12:00pm

Sunny

74°F
Dew Pt 60°F
Wind from N

N 8 mph
Precip: 0%

1:00pm

Sunny

75°F
Dew Pt 59°F
Wind from N

N 8 mph
Precip: 0%

2:00pm

Sunny

76°F
Dew Pt 58°F
Wind from NW

NW 8 mph
Precip: 0%

3:00pm

Sunny

76°F
Dew Pt 57°F
Wind from NW

NW 8 mph
Precip: 0%

4:00pm

Sunny

76°F
Dew Pt 57°F
Wind from NW

NW 8 mph
Precip: 0%

5:00pm

Sunny

74°F
Dew Pt 55°F
Wind from NW

NW 8 mph
Precip: 0%

6:00pm

Mostly Clear

72°F
Dew Pt 53°F
Wind from NW

NW 8 mph
Precip: 0%

7:00pm

Mostly Clear

69°F
Dew Pt 51°F
Wind from N

N 8 mph
Precip: 0%

8:00pm

Mostly Clear

67°F
Dew Pt 48°F
Wind from N

N 8 mph
Precip: 0%

9:00pm

Mostly Clear

64°F
Dew Pt 47°F
Wind from N

N 8 mph
Precip: 0%

10:00pm

Partly Cloudy

62°F
Dew Pt 46°F
Wind from N

N 8 mph
Precip: 0%

11:00pm

Partly Cloudy

60°F
Dew Pt 44°F
Wind from N

N 7 mph
Precip: 0%

Sat
12:00am

Partly Cloudy

58°F
Dew Pt 44°F
Wind from N

N 7 mph
Precip: 0%

Sat
1:00am

Partly Cloudy

56°F
Dew Pt 43°F
Wind from N

N 6 mph
Precip: 0%

Sat
2:00am

Mostly Cloudy

54°F
Dew Pt 43°F
Wind from N

N 5 mph
Precip: 0%

Sat
3:00am

Mostly Cloudy

53°F
Dew Pt 43°F
Wind from N

N 5 mph
Precip: 0%

Sat
4:00am

Mostly Cloudy

51°F
Dew Pt 42°F
Wind from N

N 5 mph
Precip: 0%

Sat
5:00am

Mostly Cloudy

50°F
Dew Pt 42°F
Wind Chill: 48°F
Wind from N

N 5 mph
Precip: 0%

Sat
6:00am

Partly Sunny

49°F
Dew Pt 41°F
Wind Chill: 47°F
Wind from N

N 5 mph
Precip: 0%

Sat
7:00am

Partly Sunny

49°F
Dew Pt 41°F
Wind Chill: 47°F
Wind from N

N 5 mph
Precip: 0%

Sat
8:00am

Mostly Sunny

51°F
Dew Pt 42°F
Wind from N

N 5 mph
Precip: 0%

Sat
9:00am

Mostly Sunny

55°F
Dew Pt 42°F
Wind from N

N 5 mph
Precip: 0%

Sat
10:00am

Sunny

57°F
Dew Pt 41°F
Wind from NE

NE 5 mph
Precip: 0%

Sat
11:00am

Sunny

60°F
Dew Pt 40°F
Wind from NE

NE 5 mph
Precip: 0%

Sat
12:00pm

Sunny

61°F
Dew Pt 40°F
Wind from NE

NE 5 mph
Precip: 0%

Sat
1:00pm

Mostly Sunny

63°F
Dew Pt 41°F
Wind from E

E 3 mph
Precip: 0%

Sat
2:00pm

Sunny

64°F
Dew Pt 41°F
Wind from E

E 3 mph
Precip: 0%

Sat
3:00pm

Mostly Sunny

64°F
Dew Pt 42°F
Wind from E

E 3 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 180615
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
215 AM EDT Fri Sep 18 2026

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

&&

.KEY MESSAGES...

- Shower chances into Friday morning, followed by drier 
  conditions Friday. 

- Drier conditions Friday and Saturday.

- Next chance for rain Sunday into Monday. There remains
  uncertainty in the details such as coverage, timing, amounts. 
  Showers may linger through early next week.

&&

.DISCUSSION...
KEY MESSAGE 1...Shower chances into Friday morning, followed by
drier conditions Friday.

Majority of the showers were moving across northern New England
this evening. These showers were ahead of a cold front just
about to enter southern New England as of this writing. It will
take just about all night to move this front past our region.
Currently thinking it should be over SE MA and perhaps southern
RI toward daybreak Friday. It could as late as late morning for
it to completely move past the coastal waters as well.

PWATs are quite anomalous for mid-September, nearing 2+ inches,
which is near the maximum of climatology based on sounding 
climatology at Chatham. The threat of thunderstorms is low, 
though not zero. There is also a low threat of localized heavy 
downpours due to the anomalous moisture in the atmosphere, but 
these showers are moving at a good pace. Nevertheless, rainfall 
amounts will be highly variable given the showery nature. There 
is potential for as much as a half inch of rain in the vicinity 
of Rt. 2 in northern Massachusetts and into southern Vermont and
southern New Hampshire, with much less the farther south you 
go.

KEY MESSAGE 2...Drier conditions Friday and Saturday.

A few early morning showers are possible across Cape Cod and the 
Islands; otherwise, a transient high pressure system moving out 
of the southern Canadian Prairies brings a dry stretch of 
weather Friday and Saturday. Seasonably mild temperatures are 
expected Friday, with highs in the middle 70s and elevated dew 
points initially in the lower 60s, though those fall into the 
upper 40s by Friday afternoon. Breezy NW winds in the afternoon 
with gusts 20-25 mph, mainly across the interior. Then a shift 
to more fall-like conditions on Saturday. A chilly start for 
most, with lows in the lower to middle 40s, while urban areas 
remain in the lower 50s. Not out of the question that upper 30s 
occur along the east slopes of the Berkshires and across 
northern Worcester County. Otherwise, a crisp afternoon with 
sunshine and highs in the middle to upper 60s. Light east winds 
will lead to slightly lower temperatures for eastern coastal 
communities, with locations like Boston perhaps not climbing out
of the lower 60s. Dew points in the 40s will add to the crisp 
feel.

KEY MESSAGE 3...Next chance for rain Sunday into Monday. There 
remains uncertainty in the details such as coverage, timing, 
amounts. Showers may linger through early next week.

Still have timing concerns for rainfall Sunday into Monday.
While a high pressure should be moving off the coast Saturday 
night, it may still have too much influence to prevent rainfall
from overspreading our region during the morning. Still favoring
rainfall arriving from west to east Sunday afternoon into Sunday
night. Another high pressure over eastern Canada should become
more of an influence over the course of Monday. Thus, not
certain how many showers will remain Monday morning. Thinking
the greatest risk for lingering showers will be towards the
south coast. 

The potential rain amounts will depend on the exact track of 
this low pressure, which is still variable across guidance this
far out in time. This variance translates quite clearly to the 
rain totals across both deterministic and ensemble guidance.
Moisture should not be that much of a limitation. Overall, 
still looking like another soaking rainfall for most. Favoring 
the highest rainfall totals towards the south coast of New 
England at this time.

The forecast trend is for drier weather Tuesday and Wednesday.
It appears that another low pressure could approach from the
Mid Atlantic states sometime towards Thursday.

&&

.AVIATION /06Z FRIDAY THROUGH TUESDAY/...
Forecaster Confidence Levels...

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

06Z TAF Update: 

Through 12Z...Moderate confidence.

MVFR with patchy areas of IFR and spotty VFR ceilings. Showers
push across Cape and Islands, exiting by 13Z. SW winds 6-12 kts
with a few occasional gusts to 18 kts in spots. Winds shift to 
NW 06-12z with gradually improving ceilings. Moderate confidence
is with respect to the ceilings. It is possible ceilings scatter
more quickly behind the frontal passage. Current TAF keeps
lingering MVFR through 13-14Z before scattering out. 

Friday and Friday Night...High confidence.

Areas of MVFR linger across Cape Cod and the Islands through
15z, otherwise VFR. NNW winds 8-12 kt with an occasional gust 
up to 20 kts. There may be an additional period of gusts around
20 kts in the evening (after 00Z).

KBOS Terminal...Moderate confidence in TAF.

Cold front moves through between 07-10Z shifting winds to the
NW. Ceilings this morning bounce between low end VFR and MVFR
with improvements to solid VFR once the front pushes through.
Lower confidence on exact timing, but should be likely be VFR by
13Z. Winds increase after 15Z to 8-12 kts with a few gusts
around 18 kts today. Very low probability for a sea breeze to
sneak in before 15Z before the winds increase. The current pattern
should make this unlikely. 

KBDL Terminal...Moderate confidence in TAF.

Outlook /Saturday through Tuesday/...

Saturday through Saturday Night: VFR. 

Sunday: MVFR/IFR conditions possible. SHRA likely.

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

Monday through Monday Night: VFR. Breezy. Slight chance SHRA.

Tuesday: VFR. Windy with local gusts up to 30 kt. Slight chance
SHRA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Saturday...High confidence.

A round of showers pushes across the waters tonight into early 
tomorrow morning. Seas remain 2-3 ft, though portions of the 
southern waters may approach 4 ft heading into tomorrow morning. 
Winds shift to the NW tomorrow morning, with some gusts up to 20 kt 
possible. High pressure builds in from the WNW Friday afternoon and 
remains with us through Saturday. Briefly Friday night into early 
Saturday, gusts may approach Small Craft Advisory criteria. 
Confidence in gusts exceeding 25 kt is low; however, gusts of 20 to 
25 kt seem likely. Future forecast updates may include an advisory 
if confidence in higher gusts increases. Otherwise, nice conditions 
on Saturday with seas 2-3 ft and ENE winds less than 15 kt.

Outlook /Saturday through Tuesday/...

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

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

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

Sunday Night: Winds less than 25 kt. Areas of rough seas. Rain
showers likely. 

Monday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Seas up to 5 ft. Chance of rain showers. 

Monday Night: Low risk for Small Craft Advisory winds with
local gusts up to 30 kt. Seas up to 5 ft. Chance of rain
showers. 

Tuesday: Moderate risk for Small Craft Advisory winds with
gusts up to 30 kt. Seas up to 5 ft. Chance of rain showers. 

&&

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

&&

$$

DISCUSSION...Belk/Dooley
AVIATION...Mensch
MARINE...Belk/Dooley

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