Lexington Weather

Current Conditions [‒] Current Conditions [+]

79.9°F Warmer than last hour.

26.6°C

Warm

Clear

Today: Hi 83 °F

Tonight: Lo 63 °F

Dew Point: 59.5°F Increased 0.7°F since last hour .

Humidity: 50% Decreased 1.0% since last hour.

Air Quality Index: 31

Good

(Ozone)

Barometer: 29.96 in Falling 0.03 inHg/hr

1015 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Monday: 0.23 in

Visibility: 10 miles

Wind:

Now: 1 mph

Avg: Calm

Gusts: 4 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Today, Tonight, & Wednesday through Monday Night

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Tue May 26, 2026 6:47am EDT

Overview:

- Warm and pleasant conditions today.

- Hotter on Wednesday before a bit of a cool down Thursday into Friday. Slight risk of isolated afternoon showers/t-storms Wednesday afternoon and showers Thursday afternoon.

- Temperatures trend near or below normal heading into the weekend as rain chances return.

Today:

Sunny

Hi 83 °F

Sunny, with a high near 83. West wind 2 to 9 mph.

Tonight:

Partly Cloudy

Lo 63 °F

Partly cloudy, with a low around 63. Southwest wind around 8 mph.

Wednesday:

Mostly Sunny then Chance Showers And T-Storms

Hi 85 °F

Wednesday: Mostly Sunny then Chance Showers And Thunderstorms

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. West wind 6 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

Wednesday Night:

Slight Chance Showers And T-Storms then Mostly Cloudy

Lo 60 °F

Wednesday Night: Slight Chance Showers And Thunderstorms then Mostly Cloudy

A slight chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 60. Northwest wind 5 to 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

Thursday:

Chance Rain Showers

Hi 72 °F

A chance of rain showers after 8am. Mostly sunny, with a high near 72. North wind 6 to 9 mph. Chance of precipitation is 40%.

Thursday Night:

Chance Rain Showers then Partly Cloudy

Lo 52 °F

A chance of rain showers before 8pm. Partly cloudy, with a low around 52. Northwest wind 3 to 8 mph. Chance of precipitation is 40%.

Friday:

Partly Sunny then Chance Rain Showers

Hi 68 °F

A chance of rain showers after 1pm. Partly sunny, with a high near 68. North wind 3 to 8 mph. Chance of precipitation is 40%.

Friday Night:

Rain Showers Likely

Lo 49 °F

Rain showers likely. Mostly cloudy, with a low around 49. Southwest wind 5 to 8 mph. Chance of precipitation is 60%.

Saturday:

Chance Rain Showers

Hi 63 °F

A chance of rain showers. Partly sunny, with a high near 63. North wind 6 to 10 mph. Chance of precipitation is 50%.

Saturday Night:

Chance Rain Showers

Lo 48 °F

A chance of rain showers before 3am. Partly cloudy, with a low around 48. North wind 5 to 8 mph. Chance of precipitation is 30%.

Sunday:

Mostly Sunny

Hi 70 °F

Mostly sunny, with a high near 70. Northwest wind 5 to 8 mph.

Sunday Night:

Partly Cloudy

Lo 52 °F

Partly cloudy, with a low around 52. West wind around 6 mph.

Monday:

Chance Rain Showers

Hi 70 °F

A chance of rain showers after 8am. Mostly sunny, with a high near 70. Northwest wind 6 to 9 mph. Chance of precipitation is 30%.

Monday Night:

Slight Chance Rain Showers then Partly Cloudy

Lo 51 °F

A slight chance of rain showers before 8pm. Partly cloudy, with a low around 51. Northwest wind 3 to 7 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 1pm through Thu 12am

Issued by:
National Weather Service Boston / Norton, MA
Updated Tue May 26, 2026 6:47am EDT

1:00pm

Sunny

79°F
Dew Pt 55°F
Wind from W

W 6 mph
Precip: 0%

2:00pm

Sunny

80°F
Dew Pt 55°F
Wind from W

W 7 mph
Precip: 0%

3:00pm

Sunny

81°F
Dew Pt 55°F
Wind from W

W 8 mph
Precip: 0%

4:00pm

Sunny

82°F
Dew Pt 55°F
Wind from W

W 8 mph
Precip: 0%

5:00pm

Sunny

82°F
Dew Pt 55°F
Wind from W

W 9 mph
Precip: 0%

6:00pm

Mostly Clear

79°F
Dew Pt 56°F
Wind from SW

SW 8 mph
Precip: 0%

7:00pm

Mostly Clear

77°F
Dew Pt 57°F
Wind from SW

SW 8 mph
Precip: 0%

8:00pm

Partly Cloudy

73°F
Dew Pt 56°F
Wind from SW

SW 7 mph
Precip: 0%

9:00pm

Mostly Cloudy

71°F
Dew Pt 56°F
Wind from SW

SW 7 mph
Precip: 0%

10:00pm

Partly Cloudy

69°F
Dew Pt 56°F
Wind from SW

SW 7 mph
Precip: 0%

11:00pm

Mostly Cloudy

67°F
Dew Pt 55°F
Wind from SW

SW 7 mph
Precip: 0%

Wed
12:00am

Mostly Cloudy

66°F
Dew Pt 55°F
Wind from SW

SW 7 mph
Precip: 0%

Wed
1:00am

Mostly Cloudy

66°F
Dew Pt 54°F
Wind from SW

SW 7 mph
Precip: 0%

Wed
2:00am

Partly Cloudy

65°F
Dew Pt 53°F
Wind from SW

SW 7 mph
Precip: 0%

Wed
3:00am

Mostly Cloudy

64°F
Dew Pt 53°F
Wind from SW

SW 7 mph
Precip: 0%

Wed
4:00am

Mostly Cloudy

63°F
Dew Pt 53°F
Wind from SW

SW 7 mph
Precip: 0%

Wed
5:00am

Mostly Cloudy

63°F
Dew Pt 52°F
Wind from SW

SW 6 mph
Precip: 0%

Wed
6:00am

Mostly Sunny

63°F
Dew Pt 53°F
Wind from SW

SW 6 mph
Precip: 0%

Wed
7:00am

Partly Sunny

65°F
Dew Pt 54°F
Wind from SW

SW 6 mph
Precip: 0%

Wed
8:00am

Partly Sunny

68°F
Dew Pt 56°F
Wind from W

W 6 mph
Precip: 0%

Wed
9:00am

Mostly Sunny

72°F
Dew Pt 57°F
Wind from W

W 6 mph
Precip: 0%

Wed
10:00am

Mostly Sunny

75°F
Dew Pt 58°F
Wind from W

W 7 mph
Precip: 1%

Wed
11:00am

Mostly Sunny

78°F
Dew Pt 60°F
Wind from W

W 7 mph
Precip: 1%

Wed
12:00pm

Mostly Sunny

81°F
Dew Pt 59°F
Wind from W

W 8 mph
Precip: 7%

Wed
1:00pm

Mostly Sunny

82°F
Dew Pt 59°F
Wind from W

W 9 mph
Precip: 13%

Wed
2:00pm

Slight Chance Showers And Thunderstorms

83°F
Dew Pt 59°F
Wind from W

W 10 mph
Precip: 19%
Rain: 0.01 in

Wed
3:00pm

Slight Chance Showers And Thunderstorms

83°F
Dew Pt 57°F
Wind from W

W 10 mph
Precip: 22%
Rain: 0.01 in

Wed
4:00pm

Slight Chance Showers And Thunderstorms

83°F
Dew Pt 56°F
Wind from W

W 10 mph
Precip: 24%
Rain: 0.01 in

Wed
5:00pm

Chance Showers And Thunderstorms

83°F
Dew Pt 56°F
Wind from W

W 9 mph
Precip: 27%
Rain: 0.01 in

Wed
6:00pm

Slight Chance Showers And Thunderstorms

80°F
Dew Pt 57°F
Wind from NW

NW 8 mph
Precip: 20%
Rain: 0.01 in

Wed
7:00pm

Mostly Cloudy

78°F
Dew Pt 57°F
Wind from NW

NW 7 mph
Precip: 13%
Rain: 0.01 in

Wed
8:00pm

Mostly Cloudy

74°F
Dew Pt 56°F
Wind from NW

NW 6 mph
Precip: 6%

Wed
9:00pm

Mostly Cloudy

72°F
Dew Pt 56°F
Wind from NW

NW 5 mph
Precip: 5%

Wed
10:00pm

Mostly Cloudy

70°F
Dew Pt 56°F
Wind from NW

NW 5 mph
Precip: 8%

Wed
11:00pm

Mostly Cloudy

69°F
Dew Pt 55°F
Wind from NW

NW 6 mph
Precip: 8%

Thu
12:00am

Mostly Cloudy

68°F
Dew Pt 54°F
Wind from NW

NW 6 mph
Precip: 8%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 260559
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
159 AM EDT Tue May 26 2026

.WHAT HAS CHANGED...

No significant changes to the forecast.

&&

.KEY MESSAGES...

- Warm and pleasant conditions today.

- Hotter on Wednesday before a bit of a cool down Thursday into 
Friday. Slight risk of isolated afternoon showers/t-storms Wednesday 
afternoon and showers Thursday afternoon. 

- Temperatures trend near or below normal heading into the weekend 
 as rain chances return.

&&

.DISCUSSION...

KEY MESSAGE 1...Warm and pleasant conditions today.

Big improvement in the near term forecast compared to the dreary 
holiday weekend we just left behind. This, as southern New England 
is placed beneath largely zonal mid-level flow with surface high 
pressure to start on Tuesday. Subsidence and a much drier airmass 
(PWATs down near 0.5" briefly) will give us a dry Tuesday with 
plenty of sun filtered through high cirrus. Warm advection in the 
low/mid layers coincident with good mixing to near 850 mb will push 
high temperatures back into the 80s. For reference, normal highs 
this time of year are in the upper 60s to mid 70s. 

KEY MESSAGE 2...Hotter on Wednesday before a bit of a cool down 
Thursday into Friday. Slight risk of isolated afternoon showers/t-
storms Wednesday afternoon and showers Thursday afternoon. 

Further low level warm advection Wednesday pushes temps into the mid 
to upper 80s while moisture advection kicks in with dewpoints rising 
well into the 60s, especially along the south coast. This 
contributes to a decent amount of instability (focused again over 
the south coast) with 1000+ J/kg CAPE while low level lapse rates 
are 6-7.5C/km; limitations, however, include drier air in the mid 
levels and poor mid level lapse rates which would limit updraft 
development. Even so, given a cold front dropping through providing 
some lift, can't rule out some scattered showers and thunderstorms 
in the afternoon and evening if frontal timing is right. Behind that 
front on Thursday the airmass is cooler as the first in a series of 
shortwaves rounds the base of an eastern Canada trough directly over 
SNE. This means cooler temps (highs in the 70s) and little to no 
instability, so while some diurnal showers are expected, 
thunderstorms aren't a risk. 

KEY MESSAGE 3...Temperatures trend near or below normal heading into 
the weekend as rain chances return.

A deeper, cut-off low then rounds the base of the previously 
mentioned trough in the Friday night/Saturday time period which 
would bring an unusually cold airmass overhead depending on how deep 
it ends up being. Still uncertain as to how cool and wet this 
system is in SNE but models are in agreement with the occurrence of 
the deep trough, if not the exact placement and who gets a bulk of 
the wet weather. Ensemble guidance continues to favor northern New 
England for the wettest weather. Not seeing a quick improvement in 
this cooler/unsettled pattern in New England early next week as the 
synoptic pattern features a decent omega block well into the 
extended forecast period. 


&&

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

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

06z TAF Update:

Through 12Z...High confidence in TAF. 

Generally VFR except IFR to MVFR ceilings likely across the 
Cape and Islands. Areas north and west of I-95 will be most 
favorable for the development of radiational fog, with localized
dense fog possible; however, confidence in exact placement 
remains low. 

Tuesday...High confidence.

VFR after fog burns off 12-15z. Winds become SW 8 to 12 kt.

Tuesday Night...Moderate confidence.

VFR. Marine stratus may develop south of the Islands overnight 
and drift toward the south coast. Winds remain SW less than 10 
kt.

Wednesday...Moderate confidence.

Generally VFR, though there will be a chance for afternoon 
SHRA/TSRA. Winds will be WNW at 5 to 10 kt inland and 10 to 15 
kt along the coast. 

KBOS...Moderate confidence in TAF.

Low confidence regarding fog development early this morning, 
though current thinking favors less restrictive conditions than 
suggested by LAMP/GLAMP guidance.

KBDL...Moderate confidence in TAF.

Localized fog remains possible early this morning, though 
confidence in occurrence and exact timing remains moderate.

Outlook /Wednesday Night through Saturday/...

Wednesday: VFR. Breezy. Isolated SHRA, isolated TSRA.

Wednesday Night: VFR. Isolated SHRA.

Thursday: VFR. Breezy. Isolated SHRA, isolated TSRA.

Thursday Night through Friday: VFR. Slight chance SHRA.

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

Saturday: Mainly VFR, with areas MVFR possible. Chance SHRA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Wednesday...High confidence.

Marginal Small Craft Advisory conditions continue this morning 
across the outer ocean waters, with seas of 4 to 6 ft. These 
seas gradually subside by daybreak, followed by tranquil 
boating conditions through Wednesday, with seas mainly 2 to 4 
ft. Winds remain light and somewhat variable on Tuesday as high 
pressure moves overhead. By Wednesday, winds become more 
southwesterly around 15 kt, with occasional gusts up to 20 kt 
possible over the nearshore waters south of the coast. Both 
Wednesday and Thursday afternoons feature the chance for 
isolated pop-up showers or thunderstorms, though a washout is 
not expected.

Outlook /Wednesday Night through Saturday/...

Wednesday Night through Thursday: Winds less than 25 kt.
Isolated rain showers, isolated thunderstorms. 

Thursday Night through Friday: Winds less than 25 kt. Slight
chance of rain showers. 

Friday Night: Winds less than 25 kt. Chance of rain showers. 

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

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 8 AM EDT this morning for ANZ250-
     254>256.

&&

$$

DISCUSSION...BW
AVIATION...BW
MARINE...BW

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