Lexington Weather

Current Conditions [‒] Current Conditions [+]

64.0°F Warmer than last hour.

17.8°C

Comfortable

Few Clouds

Today: Hi 71 °F

Tonight: Lo 42 °F

Dew Point: 44.4°F Decreased 1.8°F since last hour.

Humidity: 49% Decreased 7.0% since last hour.

Air Quality Index:

Good

(Ozone)

Barometer: 29.79 in Falling 0.02 inHg/hr

1009 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Thursday: 0.08 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 2 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Today, Tonight, & Saturday through Thursday Night

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Fri May 29, 2026 6:37am EDT

Overview:

- Dry for first half of today with showers developing late afternoon to early evening. Low pressure system brings rain and gusty strong winds tonight and Saturday.

- Mainly dry Sunday. Unsettled conditions return by Monday continuing through mid week with periodic chances for showers and cooler temperatures.

Today:

Partly Sunny then Chance Rain Showers

Hi 71 °F

A chance of rain showers after 4pm. Partly sunny, with a high near 71. West wind 5 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.

Tonight:

Rain Showers Likely

Lo 42 °F

Rain showers likely. Mostly cloudy, with a low around 42. Southwest wind 6 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Saturday:

Light Rain

Hi 51 °F

Rain. Mostly cloudy, with a high near 51. North wind 10 to 20 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Saturday Night:

Slight Chance Light Rain then Partly Cloudy

Lo 43 °F

A slight chance of rain before 8pm. Partly cloudy, with a low around 43. North wind 3 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

Sunday:

Mostly Sunny

Hi 71 °F

Mostly sunny, with a high near 71. Northwest wind around 6 mph.

Sunday Night:

Slight Chance Showers And T-Storms then Chance Showers And T-Storms

Lo 52 °F

Sunday Night: Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms

A slight chance of showers and thunderstorms between 8pm and 10pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 52. West wind around 5 mph. Chance of precipitation is 30%.

Monday:

Showers And T-Storms Likely

Hi 67 °F

Monday: Showers And Thunderstorms Likely

A chance of rain showers before 8am, then showers and thunderstorms likely. Partly sunny, with a high near 67. North wind 5 to 9 mph. Chance of precipitation is 60%.

Monday Night:

Chance Showers And T-Storms

Lo 48 °F

Monday Night: Chance Showers And Thunderstorms

A chance of showers and thunderstorms. Mostly cloudy, with a low around 48. Northeast wind 2 to 7 mph. Chance of precipitation is 50%.

Tuesday:

Chance Showers And T-Storms

Hi 66 °F

Tuesday: Chance Showers And Thunderstorms

A slight chance of rain showers before 8am, then a chance of showers and thunderstorms. Partly sunny, with a high near 66. Northeast wind 3 to 8 mph. Chance of precipitation is 40%.

Tuesday Night:

Chance Rain Showers

Lo 49 °F

A chance of rain showers. Mostly cloudy, with a low around 49. Northeast wind 3 to 7 mph. Chance of precipitation is 40%.

Wednesday:

Chance Rain Showers

Hi 68 °F

A chance of rain showers. Partly sunny, with a high near 68. Northeast wind 5 to 9 mph. Chance of precipitation is 30%.

Wednesday Night:

Chance Rain Showers

Lo 52 °F

A chance of rain showers before 2am. Partly cloudy, with a low around 52. North wind around 6 mph. Chance of precipitation is 30%.

Thursday:

Mostly Sunny

Hi 77 °F

Mostly sunny, with a high near 77. Northwest wind around 7 mph.

Thursday Night:

Partly Cloudy

Lo 59 °F

Partly cloudy, with a low around 59. Southwest wind around 6 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 10am through Sat 9pm

Issued by:
National Weather Service Boston / Norton, MA
Updated Fri May 29, 2026 6:37am EDT

10:00am

Partly Sunny

64°F
Dew Pt 44°F
Wind from NW

NW 8 mph
Precip: 1%

11:00am

Mostly Sunny

66°F
Dew Pt 43°F
Wind from NW

NW 9 mph
Precip: 1%

12:00pm

Partly Sunny

67°F
Dew Pt 43°F
Wind from NW

NW 8 mph
Precip: 1%

1:00pm

Partly Sunny

68°F
Dew Pt 42°F
Wind from W

W 7 mph
Precip: 1%

2:00pm

Partly Sunny

68°F
Dew Pt 43°F
Wind from W

W 6 mph
Precip: 3%

3:00pm

Mostly Cloudy

68°F
Dew Pt 43°F
Wind from W

W 7 mph
Precip: 5%

4:00pm

Chance Rain Showers

68°F
Dew Pt 45°F
Wind from SW

SW 8 mph
Precip: 43%
Rain: 0.01 in

5:00pm

Chance Rain Showers

66°F
Dew Pt 47°F
Wind from SW

SW 9 mph
Precip: 49%
Rain: 0.02 in

6:00pm

Chance Rain Showers

65°F
Dew Pt 50°F
Wind from SW

SW 8 mph
Precip: 52%
Rain: 0.02 in

7:00pm

Chance Rain Showers

63°F
Dew Pt 51°F
Wind from S

S 7 mph
Precip: 48%
Rain: 0.01 in

8:00pm

Chance Rain Showers

61°F
Dew Pt 52°F
Wind from S

S 6 mph
Precip: 34%
Rain: 0.03 in

9:00pm

Chance Rain Showers

60°F
Dew Pt 52°F
Wind from S

S 7 mph
Precip: 51%
Rain: 0.04 in

10:00pm

Rain Showers Likely

59°F
Dew Pt 52°F
Wind from S

S 7 mph
Precip: 56%
Rain: 0.05 in

11:00pm

Rain Showers Likely

58°F
Dew Pt 52°F
Wind from S

S 7 mph
Precip: 68%
Rain: 0.06 in

Sat
12:00am

Rain Showers Likely

58°F
Dew Pt 51°F
Wind from SW

SW 7 mph
Precip: 58%
Rain: 0.05 in

Sat
1:00am

Chance Rain Showers

56°F
Dew Pt 49°F
Wind from W

W 8 mph
Precip: 43%
Rain: 0.04 in

Sat
2:00am

Slight Chance Rain Showers

54°F
Dew Pt 47°F
Wind from W

W 8 mph
Precip: 19%
Rain: 0.01 in

Sat
3:00am

Slight Chance Rain Showers

52°F
Dew Pt 45°F
Wind from W

W 9 mph
Precip: 22%
Rain: 0.01 in

Sat
4:00am

Slight Chance Rain Showers

49°F
Dew Pt 44°F
Wind Chill: 45°F
Wind from NW

NW 9 mph
Precip: 15%
Rain: 0.01 in

Sat
5:00am

Chance Rain Showers

47°F
Dew Pt 42°F
Wind Chill: 43°F
Wind from NW

NW 9 mph
Precip: 29%
Rain: 0.02 in

Sat
6:00am

Chance Light Rain

45°F
Dew Pt 41°F
Wind Chill: 40°F
Wind from NW

NW 10 mph
Precip: 51%
Rain: 0.03 in

Sat
7:00am

Light Rain Likely

44°F
Dew Pt 42°F
Wind Chill: 37°F
Wind from N

N 15 mph
Precip: 73%
Rain: 0.04 in

Sat
8:00am

Light Rain

43°F
Dew Pt 41°F
Wind Chill: 35°F
Wind from N

N 18 mph
Precip: 95%
Rain: 0.03 in

Sat
9:00am

Light Rain

42°F
Dew Pt 40°F
Wind Chill: 33°F
Wind from N

N 20 mph
Precip: 97%
Rain: 0.03 in

Sat
10:00am

Light Rain

41°F
Dew Pt 39°F
Wind Chill: 32°F
Wind from N

N 18 mph
Precip: 98%
Rain: 0.03 in

Sat
11:00am

Light Rain

41°F
Dew Pt 37°F
Wind Chill: 32°F
Wind from N

N 17 mph
Precip: 100%
Rain: 0.03 in

Sat
12:00pm

Light Rain

43°F
Dew Pt 38°F
Wind Chill: 35°F
Wind from N

N 17 mph
Precip: 81%
Rain: 0.03 in

Sat
1:00pm

Light Rain Likely

45°F
Dew Pt 39°F
Wind Chill: 38°F
Wind from N

N 16 mph
Precip: 62%
Rain: 0.02 in

Sat
2:00pm

Chance Light Rain

47°F
Dew Pt 39°F
Wind Chill: 41°F
Wind from N

N 15 mph
Precip: 43%
Rain: 0.01 in

Sat
3:00pm

Chance Light Rain

47°F
Dew Pt 39°F
Wind Chill: 41°F
Wind from N

N 14 mph
Precip: 37%
Rain: 0.01 in

Sat
4:00pm

Chance Light Rain

48°F
Dew Pt 39°F
Wind Chill: 43°F
Wind from N

N 13 mph
Precip: 31%

Sat
5:00pm

Chance Light Rain

50°F
Dew Pt 39°F
Wind Chill: 46°F
Wind from N

N 12 mph
Precip: 25%

Sat
6:00pm

Slight Chance Light Rain

49°F
Dew Pt 39°F
Wind Chill: 45°F
Wind from N

N 10 mph
Precip: 21%

Sat
7:00pm

Slight Chance Light Rain

49°F
Dew Pt 39°F
Wind Chill: 46°F
Wind from N

N 7 mph
Precip: 16%

Sat
8:00pm

Mostly Cloudy

49°F
Dew Pt 42°F
Wind Chill: 47°F
Wind from N

N 5 mph
Precip: 2%

Sat
9:00pm

Mostly Cloudy

47°F
Dew Pt 42°F
Wind Chill: 46°F
Wind from N

N 3 mph
Precip: 1%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 291121
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
721 AM EDT Fri May 29 2026

.WHAT HAS CHANGED...

Increasing confidence in strong gusty winds on Saturday,
especially across eastern coastal areas. Wind Advisory issued
for northeast MA, east coast and Cape and Islands. Adjacent
areas to coast still being considered for headlines. Held off
due to larger uncertainty.

&&

.KEY MESSAGES...

- Dry for first half of today with showers developing late afternoon 
  to early evening. Low pressure system brings rain and gusty strong 
  winds tonight and Saturday. 

- Mainly dry Sunday. Unsettled conditions return by Monday continuing
  through mid week with periodic chances for showers and cooler
  temperatures.

&&

.DISCUSSION...

KEY MESSAGE 1...Dry for first half of today with showers developing 
late afternoon to early evening. Low pressure system brings rain and 
gusty strong winds tonight and Saturday. 

There is a good consensus among ensemble guidance for a blocky upper 
level pattern to set up over the northeast today through early next 
week. Several shortwaves move through the broad cyclonic flow aloft 
bringing periodic chances for showers/rain.

The first wave features an anomalous closed upper low that drops 
south across southern New England tonight into Saturday. The first 
half of today should remain dry with scattered warm frontal showers 
developing later in the afternoon and evening. High temperatures 
will likely be similar to Thursday in the upper 60s to low 70s, with 
some locations in the mid 70s in the CT Valley. Showers become more 
widespread this evening and tonight with a few waves of rain. There 
is very marginal instability present, which may support a few 
embedded weak storms or downpours. There may be a lull sometime 
overnight in between waves of showers. As the low pressure rotates 
through it will shift another round of showers Saturday morning. 
Showers slowly diminish as the low exits further offshore mid to 
late afternoon. It's possible for showers to linger as late as the 
evening for the outer Cape/Islands. 

For rain totals, ensembles range rain totals 0.20" to 1.1" across 
the 25th to 75th percentile range with the higher amounts favored in 
northeast MA. While we are already in cool troughy flow, the passage 
of this deep upper low will shift a core of anomalously cold air 
aloft across the region Saturday. This will bring us a fairly cool 
day for late-May with highs in the upper 40s and low 50s. With the 
timing of the colder air and the showers, some model guidance hints 
at potential for a few snowflakes mixing in at the higher 
elevations. If the cold air arrives in a similar period of better 
precip rates some spots may cool enough to mix in some wet flakes. 
The NAM has shown the strongest signal for this, but also shows a 
colder airmass in place with a wider footprint compared to other 
guidance (Temps - upper 30s). So overall, can't rule out a wintry 
mix in the highest elevations of the interior although little impact 
expected. 

The bigger concern with this system is the strong winds. As the 
surface low pressure tracks offshore, it deepens with a tightened 
pressure gradient and 45-60 kt 925mb LLJ. If winds mix efficiently, 
strong gusty N to NE winds will blanket the region. Ensemble 
guidance ranges gusts 35-45 mph with potential for isolated higher 
gusts (45-55 mph) along the east coast and Cape and Islands. This 
seems reasonable given that the LLJ jet more likely shifts across 
east southern New England through the day. The degree of mixing is 
still uncertain which has led to spread across guidance in gust 
magnitude and the extent inland the higher magnitude gusts may 
extend. Across ensemble guidance, the ECMWF has been consistently 
strong with gusts compared to the GEFS. HREF mean gusts show some 
areas across the east above 45 mph, mainly confined to the coastal 
areas and Cape/Islands. Right now the risk for Advisory criteria is 
greater across northeast MA, extending down the east coastal region 
and into the south coast/block island, southeast MA and 
Cape/Islands. Cape and Islands and the near-coastal areas have the 
greater confidence at the moment based on guidance, so went with 
Advisory to start. Remaining areas just outside those zones will 
need to be considered today. 


KEY MESSAGE 2...Mainly dry Sunday. Unsettled conditions return by 
Monday continuing through mid week with periodic chances for 
showers and cooler temperatures. 

A few more waves move through the upper trough pattern aloft beyond 
Sunday into early next week. There is still spread in the details of 
the waves such as the timing, but they will support periodic chances 
for showers at least through mid-week. There is a better consensus 
on showers Sun night into Mon as a closed low tracks across the 
region. Remaining days early week could see scattered showers, 
perhaps an isolated storm. 850mb temperatures anomalies lean below 
normal early next week likely yielding temperatures in the 60s and 
low 70s through Wednesday. There are signs of the blocky pattern 
breaking down later next week which should help warm temperatures 
back up.

&&

.AVIATION /12Z FRIDAY THROUGH TUESDAY/...

Forecaster Confidence Levels...

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

12z TAF Update... 

Today...High confidence.

Mainly VFR today outside the risk for a few showers mainly
after 20z/21z. NW winds may gust to around 20 knots or so into
mid afternoon...But sea breezes should kick in by mid afternoon
along portions of the immediate coast. 

Tonight and Saturday...Moderate confidence.

VFR this evening outside scattered showers especially east of 
the CT River and particularly eastern MA. Low risk for a rumble 
or two of thunder. We should then have a lull in the activity 
after midnight before the upper level low drops south. A shield 
of rain will drop south with the focus east of the CT River 
Valley in the 9z to 15z Sat time frame. Conditions will lower to
MVFR with pockets of IFR conditions possible. too. N-NE winds 
will increase with gusts on the order 30-45 knots with the 
strongest of those along the coast. We may even briefly see some wet
snow flakes mix in across the highest terrain. Gradual
improvement expected Saturday afternoon and evening from west to
east. 

KBOS...High confidence in TAF but some uncertainty on the
specific timing of the sea breeze. Currently thinking between
16z and 18z. 

KBDL...High confidence in TAF.

Outlook /Saturday night through Tuesday/...

Saturday Night: VFR. Windy with local gusts up to 30 kt. 

Sunday: VFR. 

Sunday Night: VFR. Slight chance SHRA, slight chance TSRA.

Monday: VFR. Chance SHRA, slight chance TSRA.

Monday Night: VFR. Chance SHRA.

Tuesday: VFR. Chance SHRA, slight chance TSRA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Today and Tonight...

Generally tranquil with wave heights between 1 and 3 feet for 
most of the waters. Winds from the NW between 5 and 15 mph with
gusts up to 20 mph. Winds and seas increasing from the north
early Saturday morning. 

Saturday into Saturday Night... 

Gale Warning for all the waters on Saturday as a strong low 
pressure system tracks across the region bringing gusty N-NE 
winds. There is even a chance for areas of storm force winds 
with a stronger area of low pressure.

Outlook /Saturday through Tuesday/...

Saturday: Moderate risk for gale force winds with gusts up to
45 kt. Rough seas up to 12 ft. Chance of rain showers, patchy
fog. 

Saturday Night: Low risk for Small Craft Advisory winds with
gusts up to 30 kt. Areas of rough seas. 

Sunday: Winds less than 25 kt. Local rough seas. 

Sunday Night: Winds less than 25 kt. Seas up to 5 ft. Chance of
rain showers, slight chance of thunderstorms. 

Monday: Winds less than 25 kt. Areas of seas approaching 5 ft.
Chance of rain showers, slight chance of thunderstorms. 

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

Tuesday: Winds less than 25 kt. Chance of rain showers.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...Wind Advisory from 10 AM to 8 PM EDT Saturday for MAZ007-015-
     016.
     Wind Advisory from 10 AM Saturday to 8 PM EDT Sunday for 
     MAZ019-021>024.
RI...None.
MARINE...Gale Warning from 2 AM to 8 PM EDT Saturday for ANZ230>237-250-
     251-254>256-280>283.

&&

$$

DISCUSSION...Mensch
AVIATION...Frank
MARINE...Mensch

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