Lexington Weather

Current Conditions [‒] Current Conditions [+]

63.0°F Warmer than last hour.

17.2°C

Muggy

Mostly cloudy

Memorial Day: Hi 71 °F

Tonight: Lo 56 °F

Dew Point: 61.9°F Increased 4.7°F since last hour .

Humidity: 96% Decreased 1.0% since last hour.

Air Quality Index: 16

Good

(Ozone)

Barometer: 29.95 in Falling 0.02 inHg/hr

1014 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.23 in

Rain Sunday: 0.27 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: 1 mph

Gusts: 7 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Memorial Day, Tonight, & Tuesday through Sunday Night

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Mon May 25, 2026 6:12am EDT

Overview:

- Showers fill back in this morning with brief downpours and a thunderstorm possible, transitions to drier weather in the mid to late afternoon from west to east. Warmer and more humid today with partial sunshine late.

- Above normal temperatures for the middle of next week before trending closer to normal late next week. A couple periods of showers possible, but no washouts expected.

Memorial Day:

Rain Showers then Areas Of Fog

Hi 71 °F

Rain showers and areas of fog before noon, then areas of fog and a chance of rain showers between noon and 2pm. Cloudy, with a high near 71. North wind 2 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.

Tonight:

Partly Cloudy

Lo 56 °F

Partly cloudy, with a low around 56. West wind 1 to 6 mph.

Tuesday:

Sunny

Hi 81 °F

Sunny, with a high near 81. West wind 2 to 12 mph.

Tuesday Night:

Mostly Clear

Lo 63 °F

Mostly clear, with a low around 63. Southwest wind 6 to 12 mph.

Wednesday:

Mostly Sunny then Slight Chance Showers And T-Storms

Hi 86 °F

Wednesday: Mostly Sunny then Slight Chance Showers And Thunderstorms

A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. West wind 6 to 10 mph. Chance of precipitation is 20%.

Wednesday Night:

Slight Chance Showers And T-Storms then Partly Cloudy

Lo 58 °F

Wednesday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy

A slight chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 58. Northwest wind around 8 mph. Chance of precipitation is 20%.

Thursday:

Chance Rain Showers

Hi 72 °F

A chance of rain showers between 8am and 2pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 72. North wind 6 to 9 mph. Chance of precipitation is 30%.

Thursday Night:

Chance Showers And T-Storms then Partly Cloudy

Lo 52 °F

Thursday Night: Chance Showers And Thunderstorms then Partly Cloudy

A chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms between 7pm and 11pm. Partly cloudy, with a low around 52. North wind 3 to 8 mph. Chance of precipitation is 30%.

Friday:

Chance Rain Showers

Hi 67 °F

A chance of rain showers after 10am. Partly sunny, with a high near 67. Northwest wind 3 to 8 mph. Chance of precipitation is 30%.

Friday Night:

Chance Rain Showers

Lo 51 °F

A chance of rain showers. Mostly cloudy, with a low around 51. Southwest wind around 7 mph. Chance of precipitation is 40%.

Saturday:

Chance Rain Showers

Hi 68 °F

A chance of rain showers. Partly sunny, with a high near 68. Northwest wind 6 to 12 mph. Chance of precipitation is 40%.

Saturday Night:

Chance Rain Showers

Lo 49 °F

A chance of rain showers. Partly cloudy, with a low around 49. Northwest wind 5 to 9 mph. Chance of precipitation is 30%.

Sunday:

Slight Chance Rain Showers

Hi 69 °F

A slight chance of rain showers. Mostly sunny, with a high near 69. North wind around 8 mph.

Sunday Night:

Slight Chance Rain Showers then Partly Cloudy

Lo 50 °F

A slight chance of rain showers before 8pm. Partly cloudy, with a low around 50. West wind around 6 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 1pm through Wed 12am

Issued by:
National Weather Service Boston / Norton, MA
Updated Mon May 25, 2026 6:12am EDT

1:00pm

Areas Of Fog

63°F
Dew Pt 62°F
Wind from NW

NW 5 mph
Precip: 24%
Rain: 0.01 in

2:00pm

Cloudy

65°F
Dew Pt 63°F
Wind from NW

NW 5 mph
Precip: 6%

3:00pm

Cloudy

66°F
Dew Pt 63°F
Wind from NW

NW 6 mph
Precip: 4%

4:00pm

Mostly Cloudy

68°F
Dew Pt 62°F
Wind from NW

NW 6 mph
Precip: 2%

5:00pm

Mostly Cloudy

70°F
Dew Pt 62°F
Wind from NW

NW 7 mph
Precip: 1%

6:00pm

Mostly Cloudy

69°F
Dew Pt 63°F
Wind from W

W 6 mph
Precip: 0%

7:00pm

Partly Cloudy

68°F
Dew Pt 62°F
Wind from W

W 6 mph
Precip: 0%

8:00pm

Mostly Clear

67°F
Dew Pt 61°F
Wind from W

W 5 mph
Precip: 0%

9:00pm

Mostly Clear

64°F
Dew Pt 61°F
Wind from W

W 5 mph
Precip: 0%

10:00pm

Mostly Clear

62°F
Dew Pt 60°F
Wind from W

W 3 mph
Precip: 0%

11:00pm

Partly Cloudy

61°F
Dew Pt 59°F
Wind from W

W 2 mph
Precip: 0%

Tue
12:00am

Partly Cloudy

60°F
Dew Pt 58°F
Wind from W

W 2 mph
Precip: 0%

Tue
1:00am

Partly Cloudy

60°F
Dew Pt 57°F
Wind from W

W 2 mph
Precip: 0%

Tue
2:00am

Partly Cloudy

59°F
Dew Pt 56°F
Wind from W

W 1 mph
Precip: 0%

Tue
3:00am

Partly Cloudy

58°F
Dew Pt 56°F
Wind from NW

NW 2 mph
Precip: 0%

Tue
4:00am

Mostly Clear

57°F
Dew Pt 55°F
Wind from NW

NW 2 mph
Precip: 0%

Tue
5:00am

Mostly Clear

56°F
Dew Pt 54°F
Wind from NW

NW 2 mph
Precip: 0%

Tue
6:00am

Sunny

57°F
Dew Pt 54°F
Wind from NW

NW 2 mph
Precip: 0%

Tue
7:00am

Sunny

59°F
Dew Pt 55°F
Wind from W

W 2 mph
Precip: 0%

Tue
8:00am

Sunny

63°F
Dew Pt 57°F
Wind from W

W 3 mph
Precip: 0%

Tue
9:00am

Sunny

68°F
Dew Pt 57°F
Wind from W

W 3 mph
Precip: 0%

Tue
10:00am

Sunny

70°F
Dew Pt 57°F
Wind from W

W 3 mph
Precip: 0%

Tue
11:00am

Sunny

74°F
Dew Pt 56°F
Wind from SW

SW 3 mph
Precip: 0%

Tue
12:00pm

Sunny

76°F
Dew Pt 56°F
Wind from SW

SW 5 mph
Precip: 0%

Tue
1:00pm

Sunny

78°F
Dew Pt 55°F
Wind from SW

SW 7 mph
Precip: 0%

Tue
2:00pm

Mostly Sunny

79°F
Dew Pt 55°F
Wind from SW

SW 8 mph
Precip: 0%

Tue
3:00pm

Mostly Sunny

80°F
Dew Pt 54°F
Wind from SW

SW 9 mph
Precip: 0%

Tue
4:00pm

Mostly Sunny

80°F
Dew Pt 54°F
Wind from SW

SW 10 mph
Precip: 0%

Tue
5:00pm

Mostly Sunny

80°F
Dew Pt 53°F
Wind from SW

SW 12 mph
Precip: 0%

Tue
6:00pm

Partly Cloudy

78°F
Dew Pt 55°F
Wind from SW

SW 12 mph
Precip: 0%

Tue
7:00pm

Partly Cloudy

76°F
Dew Pt 56°F
Wind from SW

SW 10 mph
Precip: 0%

Tue
8:00pm

Clear

72°F
Dew Pt 56°F
Wind from SW

SW 7 mph
Precip: 0%

Tue
9:00pm

Clear

70°F
Dew Pt 56°F
Wind from SW

SW 7 mph
Precip: 0%

Tue
10:00pm

Mostly Clear

68°F
Dew Pt 56°F
Wind from SW

SW 7 mph
Precip: 0%

Tue
11:00pm

Mostly Clear

67°F
Dew Pt 55°F
Wind from SW

SW 7 mph
Precip: 0%

Wed
12:00am

Mostly Clear

66°F
Dew Pt 55°F
Wind from SW

SW 7 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 251119
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
719 AM EDT Mon May 25 2026

.WHAT HAS CHANGED...

No significant changes.

&&

.KEY MESSAGES...

- Showers fill back in this morning with brief downpours and a 
thunderstorm possible, transitions to drier weather in the mid to 
late afternoon from west to east. Warmer and more humid today with 
partial sunshine late.

- Above normal temperatures for the middle of next week before 
trending closer to normal late next week. A couple periods of 
showers possible, but no washouts expected.

&&

.DISCUSSION...

KEY MESSAGE 1...Showers fill back in this morning with brief 
downpours and a thunderstorm possible, transitions to drier weather 
in the mid to late afternoon from west to east. Warmer and more 
humid today with partial sunshine late.

Warm front continues to approach from the south and will bring a 
brief surge of especially warm and moist air with dewpoints into the 
upper 50s to low 60s over southeastern SNE as the low lifts north 
directly overhead. Plenty of moisture in the warm sector when 
eventually the cold front drops through later this morning leading 
to another surge of rain showers and even some thunderstorms over 
the south coast where a few hundred J/kg of CAPE will briefly move 
overhead. This may lead to localized higher amounts of rain under 
any brief convection. Quickly, though, winds turn out of the west 
then northwest pulling in much drier air as PWATs drop quickly 
behind the frontal passage generally 18-00z. Given slowly clearing 
skies and potential for lingering high clouds, as mentioned 
yesterday, some locations could see a good sunset tonight. While 
most parts of SNE will see showers continuing through around noon 
(west) to mid afternoon (east) we will have a respite from the cold 
of yesterday as warm advection leads to temperatures around 15 
degrees warmer than yesterday, in the low to mid 70s. Warmest spots 
will be the CT valley where skies clear soonest and west flow 
provides a downslope component. 


KEY MESSAGE 2...Above normal temperatures for the middle of next 
week before trending closer to normal late next week. A couple 
periods of showers possible, but no washouts expected.

Not much change to the expected overall mid level synoptic pattern 
from yesterday. However, considerable differences remain between the 
deterministic models after Wednesday. Thus, have low confidence in 
the details late next week into next weekend. Will be relying more 
on ensembles and focusing more on the trends until greater clarity 
develops.

Expecting well above normal temperatures to be in place Tuesday into 
Wednesday. While we should be on the backside of a cold front for 
Thursday, there are signals in the NAEFS and NationalBlend that the 
lower temperatures for Thursday could still turn out to be slightly 
above normal for late May, with the near to slightly below normal 
temperatures hold off until Friday into next weekend. Given the 
uncertainty at this time range, anticipating this timing part of the 
forecast is likely to change over the coming week.

Rainfall-wise, it is very difficult to pin down specific windows of 
time when the risk for showers is greatest. We can't seem to get 
sufficient moisture aligned with lift. The synoptic pattern suggests 
that Wednesday still has potential to be one of those periods as a 
cold front should be crossing our region. However, the ensembles 
started to dry out the atmosphere a little more, meaning that shower 
coverage could be less than previously anticipated. For Thursday, 
the cooler conditions means increased relative humidity, but there 
is not much organized lift to focus it. Perhaps colder air aloft 
could trigger diurnal showers, but the timing of this colder air is 
questionable. These issues continue right into next weekend with the 
potential approach of a low pressure. Again, anticipating this 
aspect of the forecast is likely to undergo changes as this week 
progresses.

&&

.AVIATION /12Z MONDAY THROUGH FRIDAY/...

Forecaster Confidence Levels...

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

12z TAF Update...

Today...Moderate confidence. 

LIFR conditions were widespread early this morning along with fog
which was locally dense. In addition...another round of showers
will cross the region this morning. Slow improvement from west 
to east to MVFR during the afternoon...But IFR conditions may 
persist into this evening towards the Cape and Islands. Light- 
calm winds early this morning gradually become WNW at 5-10 knots
as the day wears along. 

Tonight...Moderate confidence.

Areas of IFR conditions in lower clouds/fog patches may linger 
near the Cape and Islands for much of the night. 
Meanwhile...many areas northwest of that region will improve to 
VFR by early evening at least temporarily. However...lingering 
low level moisture/light-calm winds tonight may result in areas
of ground fog developing especially in the typically prone 
locations. So a wide variety in conditions is possible overnight
from VFR to localized IFR- LIFR conditions. 

Tuesday...High confidence.

VFR once any lingering fog patches burn off early Tuesday
morning. Light and variable winds becoming SW at 7-13
knots as the day wears along. We may also have a period of
localized sea breezes along parts of the very immediate coast. 

KBOS...Moderate confidence in TAF. 

KBDL...Moderate confidence in TAF. 

Outlook /Tuesday Night through Friday/...

Tuesday Night: VFR. 

Wednesday: VFR. Breezy. Slight chance SHRA.

Wednesday Night: VFR. 

Thursday: VFR. Slight chance SHRA.

Thursday Night: VFR. 

Friday: VFR. Slight chance SHRA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Showers with embedded heavy rain, areas of dense fog and low risk of 
an isolated thunderstorm this morning, lingering into the 
early/mid afternoon for the southern waters. This is followed 
by drier/improving weather in the afternoon/evening from 
northwest to southeast (later south of the islands). Wind shift 
from SSW in the morning, to west in the afternoon and evening, 
then NNW overnight. Tuesday light winds become S/SW 10-15 kts. 

Outlook /Tuesday Night through Friday/...

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

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

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

Wednesday Night: Winds less than 25 kt. 

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

Thursday Night: Winds less than 25 kt. 

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

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 2 AM EDT Tuesday for ANZ250-254>256.

&&

$$

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

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