Lexington Weather

Current Conditions [‒] Current Conditions [+]

77.0°F Warmer than last hour.

25.0°C

Muggy

Mostly cloudy

This Afternoon: Hi 81 °F

Tonight: Lo 62 °F

Dew Point: 67.3°F Increased 0.2°F since last hour .

Humidity: 72% Decreased 1.0% since last hour.

Air Quality Index: 29

Good

(Ozone)

Barometer: 29.85 in S

1011 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Thursday: 0.39 in

Visibility: 10 miles

Wind:

Now: 1 mph

Avg: 2 mph

Gusts: 8 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
This Afternoon, Tonight, & Saturday through Thursday Night

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Fri Jul 31, 2026 3:45pm EDT

Overview:

- Drier and warmer Friday with only some scattered afternoon showers and a mix of clouds and sun.

- A cold front brings the return of rain Sunday night and Monday, perhaps lingering into Tuesday.

- Drying and warming trend toward Wed/Thu.

This Afternoon:

Isolated Showers And T-Storms

Hi 81 °F

This Afternoon: Isolated Showers And Thunderstorms

Isolated showers and thunderstorms. Partly sunny, with a high near 81. South wind around 3 mph. Chance of precipitation is 20%.

Tonight:

Isolated Showers And T-Storms then Patchy Fog

Lo 62 °F

Tonight: Isolated Showers And Thunderstorms then Patchy Fog

Isolated showers and thunderstorms before 8pm, then patchy fog. Partly cloudy, with a low around 62. Southwest wind around 3 mph. Chance of precipitation is 20%.

Saturday:

Patchy Fog then Mostly Sunny

Hi 84 °F

Patchy fog before 9am. Mostly sunny, with a high near 84. Southwest wind 2 to 7 mph.

Saturday Night:

Mostly Cloudy

Lo 65 °F

Mostly cloudy, with a low around 65. South wind around 7 mph.

Sunday:

Partly Sunny

Hi 86 °F

Partly sunny, with a high near 86. South wind 6 to 10 mph.

Sunday Night:

Mostly Cloudy then Chance Rain Showers

Lo 67 °F

A chance of rain showers after 2am. Mostly cloudy, with a low around 67. South wind 5 to 10 mph. Chance of precipitation is 40%.

Monday:

Showers And T-Storms

Hi 83 °F

Rain showers likely before 2pm, then showers and thunderstorms. Mostly cloudy, with a high near 83. South wind 5 to 9 mph. Chance of precipitation is 80%.

Monday Night:

Showers And T-Storms Likely then Chance Showers And T-Storms

Lo 66 °F

Monday Night: Showers And Thunderstorms Likely then Chance Showers And Thunderstorms

Showers and thunderstorms likely before 10pm, then a chance of showers and thunderstorms between 10pm and 2am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Southwest wind 5 to 8 mph. Chance of precipitation is 70%.

Tuesday:

Chance Showers And T-Storms

Hi 82 °F

Tuesday: Chance Showers And Thunderstorms

A chance of showers and thunderstorms. Partly sunny, with a high near 82. Northeast wind around 7 mph. Chance of precipitation is 40%.

Tuesday Night:

Chance Showers And T-Storms

Lo 64 °F

Tuesday Night: Chance Showers And Thunderstorms

A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. South wind 2 to 6 mph. Chance of precipitation is 30%.

Wednesday:

Chance Rain Showers

Hi 84 °F

A chance of rain showers. Partly sunny, with a high near 84. East wind 2 to 7 mph. Chance of precipitation is 40%.

Wednesday Night:

Chance Rain Showers

Lo 68 °F

A chance of rain showers. Partly cloudy, with a low around 68. South wind around 6 mph. Chance of precipitation is 30%.

Thursday:

Chance Showers And T-Storms

Hi 87 °F

Thursday: Chance Showers And Thunderstorms

A slight chance of rain showers before 2pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 87. Southwest wind 5 to 9 mph. Chance of precipitation is 50%.

Thursday Night:

Chance Showers And T-Storms then Partly Cloudy

Lo 69 °F

Thursday Night: Chance Showers And Thunderstorms then Partly Cloudy

A chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 69. Southwest wind 5 to 9 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 4pm through Sun 3am

Issued by:
National Weather Service Boston / Norton, MA
Updated Fri Jul 31, 2026 10:46am EDT

4:00pm

Slight Chance Showers And Thunderstorms

80°F
Dew Pt 67°F
Heat Index: 82°F
Wind from SW

SW 2 mph
Precip: 19%

5:00pm

Slight Chance Showers And Thunderstorms

80°F
Dew Pt 67°F
Heat Index: 82°F
Wind from SW

SW 3 mph
Precip: 20%

6:00pm

Slight Chance Showers And Thunderstorms

78°F
Dew Pt 67°F
Wind from SW

SW 3 mph
Precip: 20%

7:00pm

Mostly Cloudy

77°F
Dew Pt 67°F
Wind from SW

SW 3 mph
Precip: 15%

8:00pm

Partly Cloudy

75°F
Dew Pt 66°F
Wind from S

S 5 mph
Precip: 10%

9:00pm

Partly Cloudy

71°F
Dew Pt 66°F
Wind from SW

SW 3 mph
Precip: 4%
Rain: 0.02 in

10:00pm

Partly Cloudy

70°F
Dew Pt 66°F
Wind from S

S 3 mph
Precip: 3%
Rain: 0.01 in

11:00pm

Partly Cloudy

69°F
Dew Pt 66°F
Wind from SW

SW 3 mph
Precip: 2%
Rain: 0.01 in

Sat
12:00am

Partly Cloudy

67°F
Dew Pt 66°F
Wind from SW

SW 3 mph
Precip: 2%
Rain: 0.01 in

Sat
1:00am

Partly Cloudy

67°F
Dew Pt 66°F
Wind from SW

SW 3 mph
Precip: 1%

Sat
2:00am

Mostly Clear

65°F
Dew Pt 65°F
Wind from W

W 3 mph
Precip: 1%

Sat
3:00am

Mostly Clear

64°F
Dew Pt 64°F
Wind from W

W 3 mph
Precip: 1%

Sat
4:00am

Patchy Fog

64°F
Dew Pt 64°F
Wind from W

W 3 mph
Precip: 1%

Sat
5:00am

Patchy Fog

63°F
Dew Pt 63°F
Wind from W

W 3 mph
Precip: 1%

Sat
6:00am

Patchy Fog

64°F
Dew Pt 63°F
Wind from W

W 2 mph
Precip: 1%

Sat
7:00am

Patchy Fog

65°F
Dew Pt 65°F
Wind from W

W 2 mph
Precip: 1%

Sat
8:00am

Sunny

68°F
Dew Pt 66°F
Wind from NW

NW 2 mph
Precip: 0%

Sat
9:00am

Sunny

74°F
Dew Pt 68°F
Wind from W

W 1 mph
Precip: 0%

Sat
10:00am

Mostly Sunny

78°F
Dew Pt 68°F
Wind from W

W 1 mph
Precip: 0%

Sat
11:00am

Mostly Sunny

81°F
Dew Pt 69°F
Heat Index: 84°F
Wind from SW

SW 1 mph
Precip: 0%

Sat
12:00pm

Mostly Sunny

82°F
Dew Pt 68°F
Heat Index: 85°F
Wind from S

S 2 mph
Precip: 0%

Sat
1:00pm

Partly Sunny

84°F
Dew Pt 67°F
Heat Index: 87°F
Wind from S

S 3 mph
Precip: 0%

Sat
2:00pm

Partly Sunny

84°F
Dew Pt 67°F
Heat Index: 87°F
Wind from S

S 5 mph
Precip: 1%

Sat
3:00pm

Partly Sunny

84°F
Dew Pt 67°F
Heat Index: 87°F
Wind from S

S 5 mph
Precip: 3%

Sat
4:00pm

Mostly Cloudy

85°F
Dew Pt 68°F
Heat Index: 88°F
Wind from S

S 6 mph
Precip: 5%

Sat
5:00pm

Mostly Cloudy

83°F
Dew Pt 68°F
Heat Index: 86°F
Wind from S

S 6 mph
Precip: 4%

Sat
6:00pm

Mostly Cloudy

82°F
Dew Pt 68°F
Heat Index: 85°F
Wind from S

S 6 mph
Precip: 3%

Sat
7:00pm

Mostly Cloudy

80°F
Dew Pt 69°F
Heat Index: 83°F
Wind from S

S 6 mph
Precip: 1%

Sat
8:00pm

Cloudy

77°F
Dew Pt 67°F
Wind from S

S 6 mph
Precip: 0%

Sat
9:00pm

Mostly Cloudy

75°F
Dew Pt 67°F
Wind from S

S 5 mph
Precip: 0%

Sat
10:00pm

Mostly Cloudy

73°F
Dew Pt 67°F
Wind from S

S 5 mph
Precip: 0%

Sat
11:00pm

Mostly Cloudy

72°F
Dew Pt 68°F
Wind from S

S 6 mph
Precip: 0%

Sun
12:00am

Mostly Cloudy

71°F
Dew Pt 68°F
Wind from S

S 6 mph
Precip: 0%

Sun
1:00am

Mostly Cloudy

70°F
Dew Pt 67°F
Wind from S

S 5 mph
Precip: 0%

Sun
2:00am

Mostly Cloudy

69°F
Dew Pt 67°F
Wind from S

S 5 mph
Precip: 0%

Sun
3:00am

Mostly Cloudy

68°F
Dew Pt 67°F
Wind from S

S 5 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 311131
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
731 AM EDT Fri Jul 31 2026

.WHAT HAS CHANGED...
No significant changes.

&&

.KEY MESSAGES...

- Drier and warmer Friday with only some scattered afternoon showers 
and a mix of clouds and sun. 

- A cold front brings the return of rain Sunday night and Monday, 
perhaps lingering into Tuesday. 

- Drying and warming trend toward Wed/Thu.

&&

.DISCUSSION...
KEY MESSAGE 1...Drier and warmer Friday with only some scattered 
afternoon showers and a mix of clouds and sun. 

Finally some mid level height rises today as weak ridging builds in 
with building high pressure at the surface. Even so, the trough is 
slow to exit and cyclonic flow with a cold pool aloft (500 mb temps 
- 10 to -12C) will, after more sun/clearing in the morning, allow for 
diurnal cumulus to pop us as well as some widely scattered afternoon 
showers. That being said, the airmass is drier under backing NW flow 
and most locations will be dry. Regardless, the airmass will be 
warming allowing highs to get back into the upper 70s and low 80s. 
Light winds mean coastal seabreezes keep the immediate coastline 
comfortably in the mid 70s. 

KEY MESSAGE 2...A cold front brings the return of rain Sunday night 
and Monday, perhaps lingering into Tuesday. 

After drier and warmer (mid to upper 80s) weather on Saturday under 
a brief ridge of high pressure the patterns again begins to break 
down toward the end of the weekend/start of the work week. This is 
also where we begin to see model consensus decrease, so confidence 
in exact timing details is low. That being said, there is good 
agreement that an upper trough will dig into the east coast pulling 
a deep plume of subtropical moisture north ahead of it and into New 
England centered around Monday. The GFS is the more amplified 
solution with a stronger southern cut-off low lingering into next 
week and higher rainfall totals for SNE. A key component will be the 
cold front which crosses the region on Monday focusing the best 
forcing for ascent coincident with PWATs over 2". Considering the 
rain some locations have gotten this week (5+ inches in localized 
spots), while it doesn't appear overly concerning WRT flooding it is 
worth watching. There remains a question as to how long rain 
lingers, potentially into Tuesday for some locations. 

KEY MESSAGE 3...Drying and warming trend toward Wed/Thu.

Western Atlantic high pressure then builds west as mid level ridging 
follows and we'll see a drier and steadily warming period Wed/Thu. 
This may be a brief respite before more unsettled weather on the 
horizon.

&&

.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. 

VFR. Light N winds with coastal sea breezes. Slight chance of
some scattered showers. Low probability of TS towards central
MA and into RI. Included as PROB30s at ORH and PVD for the time
being, but would not be surprised to see those change to SHRA or
erased altogether depending on how any showers pop up today. 

Tonight...High confidence.

VFR for most with highest chances for MVFR towards the Cape and
Islands. Some IFR possible in any fog that develops tonight,
especially towards the Cape and Islands, along with in the CT
River valley. Light SW winds generally at or below 5 kt, going 
calm towards the interior.

Saturday...High confidence. 

VFR. SW winds 5-10 kts. 

KBOS Terminal...Moderate to high confidence in TAF. Seabreezes 
develop Fri 14-15z. Low probability for SHRA this afternoon; too
low to include in TAF at this time.

KBDL Terminal...High confidence in TAF. Chance for IFR
visby in any fog that develops tonight between 10z-12z.

Outlook /Saturday Night through Tuesday/...

Saturday Night: VFR. 

Sunday: VFR. Breezy. Slight chance SHRA.

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

Monday: Mainly VFR, with local MVFR possible. Breezy. Chance
SHRA, slight chance TSRA.

Monday Night: VFR. Breezy. Chance SHRA.

Tuesday: VFR.

&&

.MARINE...
Forecaster Confidence Levels...

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

Winds N/NW tonight as the low pressure just offshore continues 
shifting into the Maritimes. Seas continue to diminish heading 
into the weekend, 2-3 feet. Winds become lighter Friday and 
shift more to the SW heading into Friday night and Saturday. 
Fog expected to develop over much of the southern waters and off
the east coast of Cape Cod.

Outlook /Saturday Night through Tuesday/...

Saturday Night through Sunday: Winds less than 25 kt. 

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

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

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

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

&&

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

&&

$$

DISCUSSION...BW
AVIATION...BW/Hrencecin
MARINE...BW

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