Lexington Weather

Current Conditions [‒] Current Conditions [+]

52.5°F

11.4°C

Cool

Light rain, Mist, Overcast

This Afternoon: Hi 53 °F

Tonight: Lo 50 °F

Dew Point: 50.5°F Increased 0.3°F since last hour .

Humidity: 93% Increased 1.0% since last hour.

Air Quality Index: 30

Good

(Ozone)

Barometer: 30.38 in S

1029 mb

Rain Rate: 0.04 in/hr

Rain Today: 0.06 in

Rain Saturday: 0.00 in

Visibility: 2½ miles

Wind:

Now: 1 mph

Avg: 2 mph

Gusts: 5 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

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

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sun May 24, 2026 1:33pm EDT

Overview:

- Steady rain Sunday afternoon transitions to drizzle and fog overnight.

- Showers Monday 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 Monday 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.

This Afternoon:

Rain Showers

Hi 53 °F

Rain showers and patchy fog. Cloudy, with a high near 53. East wind around 9 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.

Tonight:

Rain Showers

Lo 50 °F

Rain showers and patchy fog. Cloudy, with a low around 50. East wind 2 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Memorial Day:

Rain Showers

Hi 71 °F

Rain showers and patchy fog before 3pm. Mostly cloudy, with a high near 71. West wind 1 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Monday Night:

Mostly Cloudy

Lo 56 °F

Mostly cloudy, with a low around 56. West wind around 5 mph.

Tuesday:

Mostly Sunny

Hi 81 °F

Mostly sunny, with a high near 81. West wind 2 to 8 mph.

Tuesday Night:

Mostly Clear

Lo 63 °F

Mostly clear, with a low around 63. Southwest wind around 7 mph.

Wednesday:

Sunny then Chance Rain Showers

Hi 86 °F

A chance of rain showers after 1pm. Sunny, with a high near 86. West wind 6 to 10 mph. Chance of precipitation is 30%.

Wednesday Night:

Partly Cloudy

Lo 58 °F

Partly cloudy, with a low around 58. Northwest wind around 8 mph.

Thursday:

Chance Rain Showers

Hi 73 °F

A chance of rain showers. Mostly sunny, with a high near 73. North wind around 8 mph. Chance of precipitation is 30%.

Thursday Night:

Partly Cloudy

Lo 53 °F

Partly cloudy, with a low around 53. North wind 3 to 7 mph.

Friday:

Chance Rain Showers

Hi 71 °F

A chance of rain showers after 11am. Mostly sunny, with a high near 71. Northwest wind 3 to 8 mph. Chance of precipitation is 30%.

Friday Night:

Slight Chance Rain Showers

Lo 51 °F

A slight chance of rain showers. Partly cloudy, with a low around 51. West wind around 7 mph.

Saturday:

Chance Rain Showers

Hi 69 °F

A chance of rain showers before 5pm. Mostly sunny, with a high near 69. West wind 5 to 9 mph. Chance of precipitation is 30%.

Saturday Night:

Partly Cloudy

Lo 51 °F

Partly cloudy, with a low around 51. Northwest wind 3 to 7 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 2pm through Tue 1am

Issued by:
National Weather Service Boston / Norton, MA
Updated Sun May 24, 2026 1:33pm EDT

2:00pm

Rain Showers

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

E 8 mph
Precip: 85%
Rain: 0.04 in

3:00pm

Rain Showers

51°F
Dew Pt 49°F
Wind from E

E 9 mph
Precip: 87%
Rain: 0.04 in

4:00pm

Rain Showers

50°F
Dew Pt 49°F
Wind Chill: 46°F
Wind from E

E 9 mph
Precip: 88%
Rain: 0.04 in

5:00pm

Rain Showers

50°F
Dew Pt 49°F
Wind Chill: 46°F
Wind from E

E 9 mph
Precip: 90%
Rain: 0.04 in

6:00pm

Rain Showers

52°F
Dew Pt 50°F
Wind from E

E 8 mph
Precip: 88%
Rain: 0.04 in

7:00pm

Rain Showers

51°F
Dew Pt 50°F
Wind from E

E 8 mph
Precip: 87%
Rain: 0.04 in

8:00pm

Rain Showers

51°F
Dew Pt 50°F
Wind from E

E 7 mph
Precip: 85%
Rain: 0.04 in

9:00pm

Rain Showers

51°F
Dew Pt 51°F
Wind from E

E 7 mph
Precip: 78%
Rain: 0.03 in

10:00pm

Rain Showers

51°F
Dew Pt 51°F
Wind from E

E 7 mph
Precip: 71%
Rain: 0.03 in

11:00pm

Rain Showers Likely

52°F
Dew Pt 52°F
Wind from E

E 6 mph
Precip: 64%
Rain: 0.03 in

Mon
12:00am

Rain Showers Likely

51°F
Dew Pt 51°F
Wind from E

E 6 mph
Precip: 56%
Rain: 0.03 in

Mon
1:00am

Chance Rain Showers

53°F
Dew Pt 53°F
Wind from E

E 5 mph
Precip: 47%
Rain: 0.02 in

Mon
2:00am

Chance Rain Showers

53°F
Dew Pt 53°F
Wind from E

E 3 mph
Precip: 39%

Mon
3:00am

Chance Rain Showers

53°F
Dew Pt 53°F
Wind from E

E 3 mph
Precip: 43%

Mon
4:00am

Chance Rain Showers

54°F
Dew Pt 54°F
Wind from E

E 3 mph
Precip: 46%
Rain: 0.01 in

Mon
5:00am

Rain Showers Likely

54°F
Dew Pt 54°F
Wind from NE

NE 2 mph
Precip: 50%
Rain: 0.01 in

Mon
6:00am

Rain Showers

54°F
Dew Pt 54°F
Wind from NE

NE 2 mph
Precip: 55%
Rain: 0.01 in

Mon
7:00am

Rain Showers

55°F
Dew Pt 55°F
Wind from NE

NE 1 mph
Precip: 59%
Rain: 0.01 in

Mon
8:00am

Rain Showers

56°F
Dew Pt 56°F
Wind from NE

NE 2 mph
Precip: 64%
Rain: 0.04 in

Mon
9:00am

Rain Showers

57°F
Dew Pt 57°F
Wind from W

W 2 mph
Precip: 63%
Rain: 0.04 in

Mon
10:00am

Rain Showers

59°F
Dew Pt 59°F
Wind from W

W 3 mph
Precip: 63%
Rain: 0.04 in

Mon
11:00am

Rain Showers

60°F
Dew Pt 60°F
Wind from SW

SW 3 mph
Precip: 62%
Rain: 0.04 in

Mon
12:00pm

Rain Showers Likely

61°F
Dew Pt 61°F
Wind from SW

SW 8 mph
Precip: 49%
Rain: 0.04 in

Mon
1:00pm

Chance Rain Showers

63°F
Dew Pt 62°F
Wind from W

W 8 mph
Precip: 35%
Rain: 0.02 in

Mon
2:00pm

Slight Chance Rain Showers

65°F
Dew Pt 63°F
Wind from W

W 9 mph
Precip: 22%
Rain: 0.01 in

Mon
3:00pm

Mostly Cloudy

68°F
Dew Pt 63°F
Wind from W

W 9 mph
Precip: 16%

Mon
4:00pm

Partly Sunny

69°F
Dew Pt 63°F
Wind from W

W 9 mph
Precip: 11%
Rain: 0.01 in

Mon
5:00pm

Partly Sunny

71°F
Dew Pt 62°F
Wind from W

W 8 mph
Precip: 5%

Mon
6:00pm

Mostly Cloudy

69°F
Dew Pt 63°F
Wind from W

W 5 mph
Precip: 4%

Mon
7:00pm

Mostly Cloudy

69°F
Dew Pt 62°F
Wind from W

W 3 mph
Precip: 3%

Mon
8:00pm

Mostly Cloudy

67°F
Dew Pt 61°F
Wind from W

W 3 mph
Precip: 2%

Mon
9:00pm

Mostly Cloudy

64°F
Dew Pt 61°F
Wind from W

W 3 mph
Precip: 2%

Mon
10:00pm

Mostly Cloudy

63°F
Dew Pt 60°F
Wind from W

W 3 mph
Precip: 1%

Mon
11:00pm

Mostly Cloudy

61°F
Dew Pt 59°F
Wind from W

W 3 mph
Precip: 1%

Tue
12:00am

Mostly Cloudy

61°F
Dew Pt 59°F
Wind from NW

NW 3 mph
Precip: 1%

Tue
1:00am

Partly Cloudy

60°F
Dew Pt 58°F
Wind from NW

NW 3 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 241759
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
159 PM EDT Sun May 24 2026

.WHAT HAS CHANGED...
Risk for showers with brief heavy rain and an isolated
thunderstorm possible Monday morning, lingering into early 
afternoon across RI and eastern MA.

&&

.KEY MESSAGES...

- Steady rain Sunday afternoon transitions to drizzle and fog 
  overnight. 

- Showers Monday 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 Monday 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...Steady rain Sunday afternoon transitions to 
drizzle and fog overnight. 

Large warm frontal rain shield over SNE this afternoon, being driven 
by a modest 35-45 kt low level SE jet off the Atlantic. This jet is 
resulting in breezy conditions along the coast, with ESE winds 
gusting to 20-25 mph at times. Winds will slacken later this evening 
and overnight, as this jet exits offshore overnight. Thus, steady 
rains this afternoon and evening will transition to more of a spotty 
light rain/drizzle overnight. As a warm front approaches from the 
south, could see some areas of dense fog develop tonight.  

KEY MESSAGE 2...Showers Monday 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 Monday with 
partial sunshine late.  

Warm front lifts north through the region Monday morning. Warm 
sector airmass will be accompanied by dew pts in the 60s, so it will 
feel warmer and more humid Monday. Short wave trough and 
accompanying cold front move through the region later in the morning 
and into the afternoon, from west to east. Modest synoptic and 
frontal scale forcing, coupled with copious deep layer moisture (dew 
pts in the 60s and PWATs 1.75-2.0 inches) along with some 
instability, will yield showers with embedded heavier rain/downpours 
and a low risk of an isolated thunderstorm. Not expecting any 
flooding (other than nuisance, minor urban/street) but more 
beneficial rains, with an additional 0.35 to 0.75 inches of rainfall 
tonight into Monday. Isolated higher amounts possible if any 
thunderstorms develop. Good column drying behind the FROPA 18z-00z 
from west to east, with PWATs crashing and yielding clouds giving 
way to breaks of sunshine from west to east mid to late afternoon. 
This should support highs of 70-75 and with dew pts in the 60s, 
it will feel considerably warmer than previous days.

KEY MESSAGE 3...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 /18Z SUNDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...

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

18Z update...

This afternoon and tonight: High confidence. 

MVFR/IFR in steady light rain this afternoon, continues to lower to 
widespread IFR this evening and tonight, with marginal IFR/LIFR at 
times in drizzle/spotty light rain and areas of dense fog. Marginal 
LLWS this afternoon and evening from low level SE jet of 35-45 kt, 
ends after 00z-03z west to east as low level jet moves offshore. 
This jet will result in ENE surface winds gusting up to 20-30 kt at 
times at coastal terminals until 00z-03z, then slackening 
thereafter.  

Monday: High confidence in trends. Moderate confidence in 
exact timing.

LIFR/LIFR at 12z Monday in drizzle/areas of rain and fog. As cold 
front approaches from the west, showers become widespread along with 
embedded heavier rain and low prob of -TSRA. After 15z LIFR/IFR 
begin to lift to IFR/MVFR and eventually VFR 18z-00z from west to 
east. SSW winds in the morning become west in the afternoon with the 
FROPA. 

Monday night: High confidence. 

Light west wind becoming NNW late. Any lingering IFR/MVFR over Cape 
Cod and Islands at 00z, will improve to VFR with the wind shift from 
SW to west and eventually NNW overnight. Low prob of MVFR in patchy 
fog overnight. 

KBOS...High confidence in TAF. Marginal LLWS (WS020 15040KT) 00z-03z 
Monday. 

KBDL...High confidence in TAF. Marginal LLWS (WS020 14040KT) 00z-03z 
Monday. 

Outlook /Tuesday through Friday/...

Tuesday through 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.

130 PM update...

Sunday afternoon and night...

SCAs remain in effect for most waters, with east winds gusting up to 
20-30 kt at times Sunday afternoon and evening, then diminishing 8 
pm to 1 am from west to east Sunday night. Rain and fog lowering 
vsby 1 to 3 miles this afternoon, then less than 1 mile at times 
tonight in areas of fog and drizzle/light rain. The long easterly 
fetch of winds will build seas 5-8 ft across the ocean waters of 
RI/MA. 

Monday and Mon night...

Showers with embedded heavy rain, areas of dense fog and low risk of 
an isolated thunderstorm in the morning, lingering into the 
early/mid afternoon for the southern waters. Then followed by 
drier/improving weather 2-5 pm 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.  

Outlook /Tuesday 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 Monday for ANZ231.
     Small Craft Advisory until 5 AM EDT Monday for ANZ232>235-237.
     Small Craft Advisory from 5 PM this afternoon to 8 PM EDT 
     Monday for ANZ250.
     Small Craft Advisory until 8 PM EDT Monday for ANZ254>256.

&&

$$

DISCUSSION...Belk/Nocera
AVIATION...Belk/Nocera
MARINE...Belk/Nocera

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