Lexington Weather

Current Conditions [‒] Current Conditions [+]

64.9°F Colder than last hour.

18.3°C

Comfortable

Mostly cloudy

Today: Hi 69 °F

Tonight: Lo 47 °F

Dew Point: 46.9°F Decreased 2.7°F since last hour.

Humidity: 52% Decreased 1.0% since last hour.

Air Quality Index: 24

Good

(Ozone)

Barometer: 29.85 in Falling 0.02 inHg/hr

1011 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Saturday: 0.28 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

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

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sun May 31, 2026 7:32am EDT

Overview:

- Dry start to the day today with scattered showers and isolated thunderstorms developing in the afternoon. Near- seasonable temperatures.

- First half of next week dominated by cooler temperatures and off- and-on showers.

- Confidence decreases in forecast for late-week. More likely leaning dry and warm. Still monitoring in potential for a coastal system to bring showers late Thursday and Friday.

Today:

Mostly Cloudy then Chance Showers And T-Storms

Hi 69 °F

Today: Mostly Cloudy then Chance Showers And Thunderstorms

Scattered rain showers between 1pm and 2pm, then a chance of showers and thunderstorms. Mostly cloudy. High near 69, with temperatures falling to around 62 in the afternoon. Northwest wind 3 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.

Tonight:

Chance Showers And T-Storms then Mostly Cloudy

Lo 47 °F

Tonight: Chance Showers And Thunderstorms then Mostly Cloudy

A chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 47. Northwest wind 3 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.

Monday:

Scattered Rain Showers then Partly Sunny

Hi 61 °F

Scattered rain showers before 11am. Partly sunny, with a high near 61. Northeast wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

Monday Night:

Mostly Clear

Lo 46 °F

Mostly clear, with a low around 46. South wind around 3 mph.

Tuesday:

Sunny then Slight Chance Rain Showers

Hi 72 °F

A slight chance of rain showers after 2pm. Sunny, with a high near 72. Northwest wind 2 to 6 mph. Chance of precipitation is 20%.

Tuesday 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. West wind around 5 mph. Chance of precipitation is 20%.

Wednesday:

Sunny

Hi 73 °F

Sunny, with a high near 73. Northeast wind 2 to 7 mph.

Wednesday Night:

Mostly Clear

Lo 53 °F

Mostly clear, with a low around 53. South wind 3 to 7 mph.

Thursday:

Sunny

Hi 82 °F

Sunny, with a high near 82. Southwest wind 2 to 8 mph.

Thursday Night:

Mostly Clear

Lo 60 °F

Mostly clear, with a low around 60. Southwest wind around 7 mph.

Friday:

Mostly Sunny

Hi 87 °F

Mostly sunny, with a high near 87. West wind 5 to 8 mph.

Friday Night:

Partly Cloudy

Lo 64 °F

Partly cloudy, with a low around 64. West wind around 7 mph.

Saturday:

Mostly Sunny then Slight Chance Rain Showers

Hi 85 °F

A slight chance of rain showers after noon. Mostly sunny, with a high near 85. West wind 5 to 8 mph.

Saturday Night:

Slight Chance Rain Showers

Lo 63 °F

A slight chance of rain showers. Partly cloudy, with a low around 63. West wind 3 to 7 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 12pm through Mon 11pm

Issued by:
National Weather Service Boston / Norton, MA
Updated Sun May 31, 2026 7:32am EDT

12:00pm

Mostly Cloudy

66°F
Dew Pt 44°F
Wind from W

W 7 mph
Precip: 7%

1:00pm

Scattered Rain Showers

67°F
Dew Pt 45°F
Wind from NW

NW 6 mph
Precip: 37%

2:00pm

Scattered Showers And Thunderstorms

67°F
Dew Pt 46°F
Wind from NW

NW 6 mph
Precip: 48%
Rain: 0.03 in

3:00pm

Scattered Rain Showers

66°F
Dew Pt 47°F
Wind from W

W 7 mph
Precip: 40%
Rain: 0.02 in

4:00pm

Scattered Showers And Thunderstorms

64°F
Dew Pt 48°F
Wind from NW

NW 6 mph
Precip: 49%
Rain: 0.03 in

5:00pm

Chance Showers And Thunderstorms

62°F
Dew Pt 49°F
Wind from NW

NW 7 mph
Precip: 61%
Rain: 0.03 in

6:00pm

Chance Showers And Thunderstorms

61°F
Dew Pt 50°F
Wind from NW

NW 7 mph
Precip: 56%
Rain: 0.03 in

7:00pm

Scattered Showers And Thunderstorms

59°F
Dew Pt 50°F
Wind from W

W 6 mph
Precip: 47%
Rain: 0.02 in

8:00pm

Scattered Showers And Thunderstorms

58°F
Dew Pt 50°F
Wind from W

W 6 mph
Precip: 49%
Rain: 0.04 in

9:00pm

Scattered Rain Showers

56°F
Dew Pt 49°F
Wind from W

W 6 mph
Precip: 33%
Rain: 0.03 in

10:00pm

Scattered Rain Showers

55°F
Dew Pt 49°F
Wind from W

W 5 mph
Precip: 31%
Rain: 0.03 in

11:00pm

Mostly Cloudy

54°F
Dew Pt 49°F
Wind from W

W 5 mph
Precip: 13%
Rain: 0.01 in

Mon
12:00am

Mostly Cloudy

52°F
Dew Pt 48°F
Wind from W

W 5 mph
Precip: 1%

Mon
1:00am

Mostly Cloudy

51°F
Dew Pt 47°F
Wind from W

W 5 mph
Precip: 1%

Mon
2:00am

Mostly Cloudy

50°F
Dew Pt 47°F
Wind Chill: 48°F
Wind from NW

NW 5 mph
Precip: 3%

Mon
3:00am

Mostly Cloudy

49°F
Dew Pt 47°F
Wind Chill: 47°F
Wind from NW

NW 5 mph
Precip: 2%

Mon
4:00am

Mostly Cloudy

48°F
Dew Pt 46°F
Wind Chill: 47°F
Wind from N

N 3 mph
Precip: 3%

Mon
5:00am

Mostly Cloudy

48°F
Dew Pt 46°F
Wind Chill: 45°F
Wind from N

N 7 mph
Precip: 13%
Rain: 0.01 in

Mon
6:00am

Isolated Rain Showers

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

N 8 mph
Precip: 23%
Rain: 0.01 in

Mon
7:00am

Scattered Rain Showers

51°F
Dew Pt 46°F
Wind from N

N 8 mph
Precip: 32%
Rain: 0.02 in

Mon
8:00am

Scattered Rain Showers

53°F
Dew Pt 46°F
Wind from NE

NE 9 mph
Precip: 42%

Mon
9:00am

Scattered Rain Showers

54°F
Dew Pt 45°F
Wind from NE

NE 9 mph
Precip: 33%

Mon
10:00am

Isolated Rain Showers

54°F
Dew Pt 45°F
Wind from NE

NE 10 mph
Precip: 23%

Mon
11:00am

Mostly Cloudy

55°F
Dew Pt 44°F
Wind from NE

NE 10 mph
Precip: 14%

Mon
12:00pm

Partly Sunny

56°F
Dew Pt 43°F
Wind from NE

NE 9 mph
Precip: 11%

Mon
1:00pm

Partly Sunny

58°F
Dew Pt 42°F
Wind from NE

NE 9 mph
Precip: 9%

Mon
2:00pm

Partly Sunny

59°F
Dew Pt 42°F
Wind from NE

NE 8 mph
Precip: 6%

Mon
3:00pm

Mostly Sunny

59°F
Dew Pt 42°F
Wind from NE

NE 7 mph
Precip: 4%

Mon
4:00pm

Mostly Sunny

59°F
Dew Pt 41°F
Wind from NE

NE 6 mph
Precip: 3%

Mon
5:00pm

Mostly Sunny

59°F
Dew Pt 41°F
Wind from N

N 5 mph
Precip: 1%

Mon
6:00pm

Mostly Clear

58°F
Dew Pt 42°F
Wind from NE

NE 3 mph
Precip: 1%

Mon
7:00pm

Mostly Clear

57°F
Dew Pt 42°F
Wind from E

E 3 mph
Precip: 1%

Mon
8:00pm

Clear

54°F
Dew Pt 42°F
Wind from SE

SE 3 mph
Precip: 0%

Mon
9:00pm

Clear

52°F
Dew Pt 42°F
Wind from SE

SE 3 mph
Precip: 0%

Mon
10:00pm

Clear

50°F
Dew Pt 42°F
Wind Chill: 49°F
Wind from S

S 3 mph
Precip: 0%

Mon
11:00pm

Clear

49°F
Dew Pt 42°F
Wind from S

S 2 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 311112
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
712 AM EDT Sun May 31 2026

.WHAT HAS CHANGED...

No significant changes to the forecast into this afternoon.

&&

.KEY MESSAGES...

- Dry start to the day today with scattered showers and 
  isolated thunderstorms developing in the afternoon. Near-
  seasonable temperatures. 

- First half of next week dominated by cooler temperatures and 
  off- and-on showers.

- Confidence decreases in forecast for late-week. More likely 
  leaning dry and warm. Still monitoring in potential for a 
  coastal system to bring showers late Thursday and Friday.

&&

.DISCUSSION...

KEY MESSAGE 1...Dry start to the day today with scattered showers
and isolated thunderstorms developing in the afternoon. Near- 
seasonable temperatures. 

Brief period with weak high pressure in place will bring a dry start 
to the day today with a mix of sun and clouds. Temperatures aloft 
warm a few degrees from yesterday allowing temperatures to recover 
back to more seasonable values in the upper 60s and low 70s. Clouds 
increase in the afternoon as the next shortwave approaches. This 
shortwave trough will drop southward bringing a slight uptick in 
moisture to support scattered showers developing in the afternoon. 
The morning sunshine and warmer temperatures should also help build 
marginal instability to support a few brief downpours or an isolate 
weak storm. 

Showers continue early tonight gradually decreasing in coverage 
through the overnight period as the remainder of the system shifts 
across the region. 

KEY MESSAGE 2...Unsettled conditions for the first half of the week 
with periods of isolated to scattered showers.

Another push of cold air gets ushered into the region Monday behind 
the Sunday night's system. This will bring cool day with cooler than 
normal highs in the upper 50s and 60s. Expect warmer temperatures in 
the CT Valley in the mid to upper 60s while onshore flow keeps the 
east coastal areas on the cooler side struggling to get into the low 
60s. A weak trailing piece of shortwave energy drops south during 
the day Monday. Not much moisture to work with, but there is a low 
chance (< 30%) to support isolated/pop-up showers in the afternoon. 

Tuesday, the core of lower 500mb heights shifts east although 
souther New England still remains under a trough aloft. With the 
slight moderation in heights, temperatures aloft follow by warming a 
few degrees from Monday. This should support a more seasonable day 
with high temperatures in the low to mid 70s with local sea breezes. 
Coastal areas may end up a bit cooler in the upper 60s where the sea 
breeze sets up. There are indications across model guidance for 
another weak piece of shortwave energy shifting southward across the 
region resulting in another shot for some pop-up showers in the 
afternoon. 

KEY MESSAGE 3...Confidence decreases in forecast for late-week. More 
likely leaning dry and warm. Still monitoring in potential for a 
coastal system to bring showers late Thursday and Friday. 

Uncertainty grows in the forecast as we head into late-week. 
Ensemble guidance shows a general consensus with an amplified upper 
level trough nudging east into the region. A chunk of solutions 
indicate that a closed low develops at the base of the upper trough 
near the Carolinas then tracking in a north/east Thursday into 
Friday. Ensemble means are currently favoring this closed low to 
track well offshore of the region resulting in dry conditions. 
However, there have been individual solutions across deterministic 
and ensemble guidance that indicate a closer pass to the 40N/70W 
benchmark which may bring showers to the eastern portions of the 
region. If it does end up dry, there is a signal for a strong ridge 
aloft to bring an anomalously warm airmass into the region. This may 
support summer-like temperatures in the low to mid 80s, perhaps 
nearing 90s in the Valleys.

&&

.AVIATION /12Z SUNDAY THROUGH THURSDAY/...

Forecaster Confidence Levels...

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

12z TAF Update...

Today...High Confidence.

Any lingering localized fog patches burn off by 13z.
Otherwise...VFR today outside of scattered showers and an 
isolated t-storm or two expected to develop after 18z especially
across central and eastern MA into RI. Given cold temps 
aloft...a bit of graupel is possible with any of the heavier 
showers too. WNW generally near 10 knots...But brief localized 
sea breezes possible for a time near the immediate coast this 
afternoon.

Tonight...High Confidence. 

Mainly VFR outside any scattered showers and isolated t-storm
risk with the main threat coming to an end by midnight. 
Potential for MVFR ceilings to push in after 10Z for the east 
coast/Cape terminals. This as light NW flow turns N-NE towards
12z Monday and increase to between 8 and 14 knots. 

KBOS...High confidence in TAF. Main concern is after 18z for
scattered showers with the low risk of an isolated t-storm in
the vicinity of the terminal into this evening. Also...a brief
sea breeze possible this afternoon. 

KBDL...High confidence in TAF.

Outlook /Monday through Thursday/...

Monday: Mainly VFR, with local MVFR possible. Slight chance
SHRA.

Monday Night: VFR. 

Tuesday: VFR. Slight chance SHRA.

Tuesday Night through Thursday: VFR.

&&

.MARINE...
Forecaster Confidence Levels...

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

Today and Tonight...High Confidence. 

NW winds continue to decrease across the water early this
morning, less than 25 kts by 12Z. SCAs remain in place for outer
coastal waters for 5-6 ft seas. Cape Cod Bay/Nantucket sound and
Mass Bay falls below 5 ft this morning followed by the norther
outer coastal waters by this evening. Seas stay around 5 ft 
through late tonight for the southern outer coastal waters. 

Outlook /Monday through Thursday/...

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

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

Tuesday through Tuesday Night: Winds less than 25 kt. 

Wednesday through Wednesday Night: Winds less than 25 kt. Seas
locally approaching 5 ft. Slight chance of rain showers. 

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

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 11 AM EDT this morning for ANZ231-
     232-251.
     Small Craft Advisory until 8 PM EDT this evening for ANZ250.
     Small Craft Advisory until 11 PM EDT this evening for 
     ANZ254>256.

&&

$$

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

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