Lexington Weather

Current Conditions [‒] Current Conditions [+]

63.1°F Warmer than last hour.

17.3°C

Muggy

Overcast

This Afternoon: Hi 68 °F

Tonight: Lo 55 °F

Dew Point: 62.1°F Increased 0.2°F since last hour .

Humidity: 96% Decreased 1.0% since last hour.

Air Quality Index: 17

Good

(Fine Particles)

Barometer: 29.90 in S

1013 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.28 in

Rain Monday: 0.44 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
This Afternoon, Tonight, & Wednesday through Monday Night

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Tue Sep 29, 2026 1:51pm EDT

Overview:

- Drier and warmer weather through Friday.

- Passing frontal boundary brings light rain showers Friday night into early Saturday, then drying out Saturday with onshore breezes for the Cape and Islands. Cloud cover and possible showers return Sunday, but it is uncertain how far north rain would extend.

- Dry weather, but blustery and a much cooler, Fall-like airmass returns for early to mid next week.

This Afternoon:

Mostly Cloudy

Hi 68 °F

Mostly cloudy, with a high near 68. Northwest wind 2 to 6 mph.

Tonight:

Mostly Cloudy

Lo 55 °F

Mostly cloudy, with a low around 55. North wind around 2 mph.

Wednesday:

Partly Sunny

Hi 72 °F

Partly sunny, with a high near 72. Southwest wind around 3 mph.

Wednesday Night:

Patchy Fog

Lo 57 °F

Patchy fog after 9pm. Mostly cloudy, with a low around 57. South wind around 5 mph.

Thursday:

Patchy Fog then Partly Sunny

Hi 79 °F

Patchy fog before 9am. Partly sunny, with a high near 79. Southwest wind 3 to 8 mph.

Thursday Night:

Partly Cloudy

Lo 65 °F

Partly cloudy, with a low around 65. Southwest wind around 8 mph.

Friday:

Mostly Sunny

Hi 81 °F

Mostly sunny, with a high near 81. Southwest wind 6 to 9 mph.

Friday Night:

Chance Rain Showers

Lo 59 °F

A chance of rain showers after 7pm. Mostly cloudy, with a low around 59. West wind around 8 mph. Chance of precipitation is 40%.

Saturday:

Slight Chance Rain Showers then Sunny

Hi 69 °F

A slight chance of rain showers before 7am. Sunny, with a high near 69. North wind around 7 mph.

Saturday Night:

Partly Cloudy

Lo 49 °F

Partly cloudy, with a low around 49. Northeast wind around 5 mph.

Sunday:

Chance Rain Showers

Hi 64 °F

A chance of rain showers after 8am. Partly sunny, with a high near 64. East wind around 6 mph. Chance of precipitation is 30%.

Sunday Night:

Chance Rain Showers

Lo 49 °F

A chance of rain showers. Mostly cloudy, with a low around 49. South wind around 5 mph. Chance of precipitation is 40%.

Monday:

Slight Chance Rain Showers then Sunny

Hi 64 °F

A slight chance of rain showers before 8am. Sunny, with a high near 64. West wind 3 to 9 mph.

Monday Night:

Mostly Clear

Lo 42 °F

Mostly clear, with a low around 42. Northwest wind around 8 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 5pm through Thu 4am

Issued by:
National Weather Service Boston / Norton, MA
Updated Tue Sep 29, 2026 1:51pm EDT

5:00pm

Mostly Cloudy

67°F
Dew Pt 60°F
Wind from NW

NW 2 mph
Precip: 3%

6:00pm

Mostly Cloudy

66°F
Dew Pt 60°F
Wind from N

N 2 mph
Precip: 3%

7:00pm

Mostly Cloudy

64°F
Dew Pt 60°F
Wind from NE

NE 1 mph
Precip: 3%

8:00pm

Mostly Cloudy

63°F
Dew Pt 59°F
Wind from NE

NE 1 mph
Precip: 2%

9:00pm

Mostly Cloudy

60°F
Dew Pt 59°F
Wind from NE

NE 2 mph
Precip: 2%

10:00pm

Mostly Cloudy

59°F
Dew Pt 58°F
Wind from NW

NW 2 mph
Precip: 2%

11:00pm

Mostly Cloudy

59°F
Dew Pt 58°F
Wind from NW

NW 2 mph
Precip: 2%

Wed
12:00am

Mostly Cloudy

59°F
Dew Pt 57°F
Wind from W

W 2 mph
Precip: 2%

Wed
1:00am

Mostly Cloudy

58°F
Dew Pt 57°F
Wind from W

W 2 mph
Precip: 2%

Wed
2:00am

Mostly Cloudy

58°F
Dew Pt 56°F
Wind from NW

NW 2 mph
Precip: 1%

Wed
3:00am

Mostly Cloudy

57°F
Dew Pt 56°F
Wind from NW

NW 2 mph
Precip: 1%

Wed
4:00am

Mostly Cloudy

56°F
Dew Pt 55°F
Wind from NW

NW 2 mph
Precip: 1%

Wed
5:00am

Mostly Cloudy

56°F
Dew Pt 55°F
Wind from NW

NW 2 mph
Precip: 1%

Wed
6:00am

Partly Sunny

55°F
Dew Pt 55°F
Wind from NW

NW 2 mph
Precip: 1%

Wed
7:00am

Mostly Sunny

55°F
Dew Pt 55°F
Wind from NW

NW 2 mph
Precip: 1%

Wed
8:00am

Mostly Sunny

56°F
Dew Pt 56°F
Wind from NW

NW 2 mph
Precip: 0%

Wed
9:00am

Mostly Sunny

59°F
Dew Pt 58°F
Wind from NW

NW 2 mph
Precip: 0%

Wed
10:00am

Mostly Sunny

63°F
Dew Pt 59°F
Wind from NW

NW 2 mph
Precip: 0%

Wed
11:00am

Mostly Sunny

66°F
Dew Pt 60°F
Wind from SW

SW 2 mph
Precip: 0%

Wed
12:00pm

Mostly Sunny

68°F
Dew Pt 60°F
Wind from SW

SW 2 mph
Precip: 0%

Wed
1:00pm

Mostly Sunny

69°F
Dew Pt 60°F
Wind from W

W 3 mph
Precip: 0%

Wed
2:00pm

Partly Sunny

70°F
Dew Pt 60°F
Wind from SW

SW 3 mph
Precip: 0%

Wed
3:00pm

Partly Sunny

71°F
Dew Pt 60°F
Wind from SW

SW 3 mph
Precip: 0%

Wed
4:00pm

Partly Sunny

70°F
Dew Pt 60°F
Wind from S

S 3 mph
Precip: 0%

Wed
5:00pm

Mostly Sunny

71°F
Dew Pt 60°F
Wind from SE

SE 3 mph
Precip: 0%

Wed
6:00pm

Mostly Cloudy

69°F
Dew Pt 60°F
Wind from SE

SE 3 mph
Precip: 0%

Wed
7:00pm

Mostly Cloudy

66°F
Dew Pt 60°F
Wind from SE

SE 3 mph
Precip: 0%

Wed
8:00pm

Mostly Cloudy

65°F
Dew Pt 60°F
Wind from SE

SE 3 mph
Precip: 0%

Wed
9:00pm

Patchy Fog

62°F
Dew Pt 60°F
Wind from S

S 3 mph
Precip: 0%

Wed
10:00pm

Patchy Fog

60°F
Dew Pt 59°F
Wind from S

S 3 mph
Precip: 0%

Wed
11:00pm

Patchy Fog

60°F
Dew Pt 59°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
12:00am

Patchy Fog

59°F
Dew Pt 58°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
1:00am

Patchy Fog

58°F
Dew Pt 58°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
2:00am

Patchy Fog

58°F
Dew Pt 57°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
3:00am

Patchy Fog

57°F
Dew Pt 57°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
4:00am

Patchy Fog

58°F
Dew Pt 57°F
Wind from SW

SW 3 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 291756
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
156 PM EDT Tue Sep 29 2026

.WHAT HAS CHANGED...
The River Flood Warning for the Taunton River at Bridgewater was
extended into Wednesday based on latest NERFC river forecasts. 
Otherwise no significant changes.

&&

.KEY MESSAGES...

- Drier and warmer weather through Friday.

- Passing frontal boundary brings light rain showers Friday 
  night into early Saturday, then drying out Saturday with 
  onshore breezes for the Cape and Islands. Cloud cover and 
  possible showers return Sunday, but it is uncertain how far 
  north rain would extend.

- Dry weather, but blustery and a much cooler, Fall-like airmass
  returns for early to mid next week.

&&

.DISCUSSION...
KEY MESSAGE 1...Drier and warmer weather through Friday.

No big changes to model guidance for the next few days. The overall 
synoptic scenario that will play out is that a rather weak surface 
high pressure will move across the region on Wednesday and then 
strengthen and establish itself off the East Coast for Thursday and 
Friday.  As this happens, the northwest winds we currently have on 
the backside of the nor'easter will transition to light westerly 
Wednesday and then to southwesterly Thursday and Friday. This will 
all help to transport warmer temperatures at low and mid levels. 
Aloft, ridging will also develop along the east coast. The net 
result will be dry weather through Friday. However we won't be 
seeing fully sunny days to go along with the high pressure. There 
will still be some residual low level moisture on Wednesday thanks 
to that nor'easter that will result in areas of strato-cu. That will 
especially be the case across eastern areas. Still there will be 
more sunshine than we got today. On Thursday, it looks like mid and 
high level clouds will flow across the region from the storminess 
across the central part of the country.  Friday will probably end up 
as the sunniest of the days.  As mentioned, temperatures will be 
warming. 925mb temperatures today are in the 11-13C range and will 
increase to 12-15C Wednesday, 16-18C Thursday and then 20-22C on 
Friday. If we had full sunshine and excellent boundary layer mixing, 
adding about 10C to those values would give a good estimate for 
daytime highs. That won't quite be the case, but still enough to 
push temperatures into the low 70s Wednesday, mid-upper 70s Thursday 
and low 80s Friday. Stuck with the NBM blend for those temperatures 
as they seemed reasonable enough. Overnight lows will also remain 
above normal, and Thursday night most of the area will stay in the 
60s. Lows around 50F are normal for the end of September/start of 
October. 

KEY MESSAGE 2...Passing frontal boundary brings light rain 
showers Friday night into early Saturday, then drying out 
Saturday with onshore breezes for the Cape and Islands. Cloud 
cover and possible showers return Sunday, but it is uncertain 
how far north rain would extend.

A progressive cold frontal boundary moves in from the Gt 
Lakes/northern Appalachians Fri night into early on Sat AM, which 
will bring an end to the spell of late-week warmer temperatures. 
Although the front looks to have some moisture with it (PWATs around 
1.4" per 15z SREF mean), the better forcing passes to the north and 
weakens/becomes sheared out with time. Expect there to be clouds and 
light showers but total rains look to be around a quarter inch or 
less with this frontal boundary. 

We get into strong surface ridging building in from the northwest in 
the wake of the frontal boundary on Saturday; with the frontal 
boundary stalling south of the Long Island waters. Expect mostly 
sunny conditions, with a mix of sun and clouds and northeast breezes 
toward southeast MA/eastern RI, Cape Cod and the Islands which will 
keep those areas cooler than further inland. Highs mainly in the mid 
60s to near 70 for most, but cooler low 60s for highs for the Cape. 
Lows in the mid 40s for interior Southern New England with good 
radiational cooling, but in the low to mid 50s near the coast where 
NE winds still hang on helping to keep the PBL more mixed and less 
prone to decouple. 

Sunday into Sunday night is the more uncertain element of the 
weekend forecast. The stalled frontal boundary begins to draw 
northward an influx of rich moisture from the southeast US states 
with weak/nebulous 500 mb vort energy riding along it. This shield 
of rain will be moving into the drier antecedent airmass in place 
over the Northeast states; 12z guidance conveys uncertainty how far 
north this moisture/rain makes it, which is seemingly tied to the 
extent to which the existing sfc ridge weakens, if it does so at 
all. The best chance for rain showers on Sunday looks to be for the 
southern third of Southern New England with less of a chance the 
further north one goes with ridging still holding on, but will 
maintain NBM-based slight to chance PoP CWA-wide for now until there 
is more congruence in the models. 

KEY MESSAGE 3...Dry weather, but blustery and a much cooler, 
Fall-like airmass returns for early to mid next week. 

The frontal boundary to our south moves offshore early on Monday, 
and behind it comes a seasonably strong mid/upper level trough and 
associated 1030 mb Canadian anticyclone into New England. This 
feature brings dry weather but increasingly breezy conditions and 
also brings with it the coldest low-level airmass seen to this point 
in early-autumn. By 12z Tuesday, our 925 mb temperatures drop to a 
chilly -2C! Climatological high temperature normals for this time of 
year are in the mid 60s, and we could run some 5-10 degrees cooler 
than those normals into early next week, with cooler breezes
too. 

&&

.AVIATION /18Z TUESDAY THROUGH SUNDAY/...
Forecaster Confidence Levels...

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

18z TAF Update...

Today and Tonight...High confidence in trends. 

MVFR, low level moisture will remain in place, resulting in 
widespread ceilings of 2k-2.5kft for most areas much of the day,
although there may be patchy 3k CIGS at times. WNW to NW winds 5
to 10 kt, becoming light to calm overnight. Wednesday...High 
confidence. 

VFR. Light WNW winds, though ESE winds for eastern coastal MA
and SW wind for southern RI and the Islands. 

KBOS Terminal...High confidence in TAF.

KBDL Terminal...High confidence in TAF.

Outlook /Wednesday Night through Sunday/...

Thursday through Thursday Night: VFR. Breezy. 

Friday through Friday Night: VFR. Breezy. Chance SHRA.

Saturday: VFR. Breezy. 

Saturday Night: VFR. 

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

&&

.MARINE...
Forecaster Confidence Levels...

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

Overall high confidence.

As the nor'easter continues to pull away, winds and seas continue to 
subside. The remaining rougher sea conditions across our eastern 
marine zones have finally fallen below SCA thresholds. High pressure 
will become established off the east coast, setting up southwest 
flow across the region beginning later tomorrow and continuing into 
Friday.  We may start to see seas building toward 5 feet by late 
Thursday/early Friday across the southern waters due to the 
sustained southwest winds.

Outlook /Wednesday Night through Sunday/...

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

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

Friday Night: Winds less than 25 kt. Seas up to 5 ft. Chance of
rain showers. 

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

Saturday Night: Winds less than 25 kt. Areas of seas
approaching 5 ft. Slight chance of rain showers. 

Sunday: Winds less than 25 kt. Seas up to 5 ft. Chance of rain
showers. 

&&

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

&&

$$

DISCUSSION...Loconto/Nash
AVIATION...Loconto/Dooley/Nash
MARINE...Loconto/Nash

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