Lexington Weather

Current Conditions [‒] Current Conditions [+]

62.2°F Warmer than last hour.

16.8°C

Comfortable

Clear

Today: Hi 65 °F

Tonight: Lo 48 °F

Dew Point: 38.3°F Increased 2.0°F since last hour .

Humidity: 41% Increased 2.0% since last hour.

Air Quality Index: 34

Good

(Ozone)

Barometer: 30.32 in Falling 0.02 inHg/hr

1027 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Thursday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 2 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

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

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Fri May 22, 2026 5:39am EDT

Overview:

- Cooler and dry weather through Saturday. Turning overcast with even cooler temps (60s) for Saturday, with rain developing later Saturday evening.

- Cool with widespread rain Sunday.

- Warming trend next week. Scattered showers lingering Monday with another chance of showers Wed.

Today:

Mostly Sunny

Hi 65 °F

Mostly sunny, with a high near 65. Northeast wind around 8 mph.

Tonight:

Mostly Cloudy

Lo 48 °F

Mostly cloudy, with a low around 48. Southwest wind 0 to 7 mph.

Saturday:

Cloudy

Hi 63 °F

Cloudy, with a high near 63. Northeast wind 1 to 8 mph.

Saturday Night:

Mostly Cloudy then Chance Rain Showers

Lo 47 °F

A chance of rain showers after midnight. Mostly cloudy, with a low around 47. East wind 3 to 7 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.

Sunday:

Rain Showers

Hi 55 °F

Rain showers. Cloudy, with a high near 55. East wind 6 to 10 mph. Chance of precipitation is 90%.

Sunday Night:

Rain Showers

Lo 50 °F

Rain showers. Cloudy, with a low around 50. Northeast wind 5 to 9 mph. Chance of precipitation is 90%.

Memorial Day:

Chance Rain Showers

Hi 71 °F

A chance of rain showers. Mostly cloudy, with a high near 71. North wind around 7 mph. Chance of precipitation is 50%.

Monday Night:

Slight Chance Rain Showers then Mostly Cloudy

Lo 55 °F

A slight chance of rain showers before 7pm. Mostly cloudy, with a low around 55. West wind around 5 mph.

Tuesday:

Partly Sunny

Hi 80 °F

Partly sunny, with a high near 80. West wind 2 to 7 mph.

Tuesday Night:

Partly Cloudy

Lo 59 °F

Partly cloudy, with a low around 59. Southwest wind around 6 mph.

Wednesday:

Mostly Sunny then Slight Chance Rain Showers

Hi 82 °F

A slight chance of rain showers after 2pm. Mostly sunny, with a high near 82. West wind 5 to 9 mph.

Wednesday Night:

Slight Chance Rain Showers then Partly Cloudy

Lo 56 °F

A slight chance of rain showers before 8pm. Partly cloudy, with a low around 56. Northwest wind 5 to 8 mph.

Thursday:

Mostly Sunny then Slight Chance Rain Showers

Hi 72 °F

A slight chance of rain showers after 3pm. Mostly sunny, with a high near 72. North wind 5 to 8 mph.

Thursday Night:

Slight Chance Rain Showers then Partly Cloudy

Lo 53 °F

A slight chance of rain showers before 8pm. Partly cloudy, with a low around 53. North wind 3 to 7 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 2pm through Sun 1am

Issued by:
National Weather Service Boston / Norton, MA
Updated Fri May 22, 2026 5:39am EDT

2:00pm

Partly Sunny

62°F
Dew Pt 33°F
Wind from E

E 8 mph
Precip: 0%

3:00pm

Mostly Sunny

62°F
Dew Pt 33°F
Wind from SE

SE 8 mph
Precip: 0%

4:00pm

Mostly Sunny

63°F
Dew Pt 33°F
Wind from SE

SE 8 mph
Precip: 0%

5:00pm

Partly Sunny

62°F
Dew Pt 32°F
Wind from SE

SE 7 mph
Precip: 0%

6:00pm

Mostly Cloudy

61°F
Dew Pt 32°F
Wind from SE

SE 7 mph
Precip: 0%

7:00pm

Mostly Cloudy

59°F
Dew Pt 32°F
Wind from SE

SE 6 mph
Precip: 0%

8:00pm

Mostly Cloudy

57°F
Dew Pt 32°F
Wind from SE

SE 5 mph
Precip: 0%

9:00pm

Mostly Cloudy

55°F
Dew Pt 32°F
Wind from SE

SE 3 mph
Precip: 0%

10:00pm

Mostly Cloudy

54°F
Dew Pt 33°F
Wind from S

S 3 mph
Precip: 0%

11:00pm

Mostly Cloudy

52°F
Dew Pt 33°F
Wind from S

S 2 mph
Precip: 0%

Sat
12:00am

Mostly Cloudy

52°F
Dew Pt 33°F
Wind from SW

SW 2 mph
Precip: 0%

Sat
1:00am

Mostly Cloudy

51°F
Dew Pt 34°F
Wind from SW

SW 1 mph
Precip: 0%

Sat
2:00am

Cloudy

50°F
Dew Pt 34°F
Wind from W

W 1 mph
Precip: 0%

Sat
3:00am

Cloudy

50°F
Dew Pt 35°F
Wind from W

W 1 mph
Precip: 0%

Sat
4:00am

Cloudy

49°F
Dew Pt 35°F
Wind from

0 mph
Precip: 0%

Sat
5:00am

Mostly Cloudy

49°F
Dew Pt 36°F
Wind from NW

NW 1 mph
Precip: 0%

Sat
6:00am

Cloudy

50°F
Dew Pt 37°F
Wind from NW

NW 1 mph
Precip: 0%

Sat
7:00am

Cloudy

52°F
Dew Pt 37°F
Wind from N

N 1 mph
Precip: 0%

Sat
8:00am

Cloudy

55°F
Dew Pt 37°F
Wind from N

N 1 mph
Precip: 0%

Sat
9:00am

Cloudy

57°F
Dew Pt 37°F
Wind from NE

NE 2 mph
Precip: 0%

Sat
10:00am

Cloudy

59°F
Dew Pt 37°F
Wind from E

E 5 mph
Precip: 0%

Sat
11:00am

Mostly Cloudy

61°F
Dew Pt 37°F
Wind from E

E 7 mph
Precip: 0%

Sat
12:00pm

Cloudy

61°F
Dew Pt 37°F
Wind from E

E 7 mph
Precip: 0%

Sat
1:00pm

Mostly Cloudy

62°F
Dew Pt 36°F
Wind from E

E 8 mph
Precip: 0%

Sat
2:00pm

Cloudy

61°F
Dew Pt 36°F
Wind from E

E 8 mph
Precip: 0%

Sat
3:00pm

Cloudy

61°F
Dew Pt 36°F
Wind from E

E 8 mph
Precip: 1%

Sat
4:00pm

Cloudy

60°F
Dew Pt 37°F
Wind from E

E 8 mph
Precip: 3%

Sat
5:00pm

Cloudy

59°F
Dew Pt 37°F
Wind from E

E 7 mph
Precip: 4%

Sat
6:00pm

Cloudy

58°F
Dew Pt 38°F
Wind from E

E 7 mph
Precip: 7%

Sat
7:00pm

Cloudy

57°F
Dew Pt 39°F
Wind from E

E 6 mph
Precip: 11%

Sat
8:00pm

Cloudy

55°F
Dew Pt 40°F
Wind from E

E 5 mph
Precip: 7%

Sat
9:00pm

Mostly Cloudy

54°F
Dew Pt 41°F
Wind from E

E 3 mph
Precip: 9%

Sat
10:00pm

Mostly Cloudy

53°F
Dew Pt 42°F
Wind from SE

SE 3 mph
Precip: 11%

Sat
11:00pm

Mostly Cloudy

52°F
Dew Pt 42°F
Wind from SE

SE 3 mph
Precip: 13%

Sun
12:00am

Slight Chance Rain Showers

51°F
Dew Pt 42°F
Wind from SE

SE 3 mph
Precip: 16%

Sun
1:00am

Slight Chance Rain Showers

51°F
Dew Pt 43°F
Wind from E

E 3 mph
Precip: 19%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 221801
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
201 PM EDT Fri May 22 2026

.WHAT HAS CHANGED...
No significant changes.

&&

.KEY MESSAGES...

- Cooler and dry weather through Saturday. Turning overcast with 
even cooler temps (60s) for Saturday, with rain developing later 
Saturday evening.

- Cool with widespread rain Sunday. 

- Warming trend next week. Scattered showers lingering Monday  with 
another chance of showers Wed.

&&

.DISCUSSION...
KEY MESSAGE 1...Cooler and dry weather through Saturday. Turning 
overcast with even cooler temps (60s) for Saturday, with rain 
developing later Saturday evening.

The surface high pressure over the Great Lakes expands over New 
England on Friday and Saturday with subsidence keeping things dry 
and sunny to start. Friday will feature sunny skies, cool onshore 
breezes, and high temperatures in the mid 60s to low 70s. The 
exception will be along the immediate coast where those seabreezes 
keep temps in the upper 50s to low 60s. This cooler airmass with 
850mb temps in the 2-3C range doesn't change much over the course of 
the next 48 hours, but Saturday will be cooler if mainly due to 
increased cloudcover as moisture streams overhead ahead of our next 
wet weather system. The dry air in the low/mid levels and stubborn 
high pressure will keep the rain at bay for much of the region on 
Saturday, so while it will be cool and cloudy, many of those with 
outdoor plans should be able to keep them. The most likely to stay 
dry will be areas RI north and east, with a better chance for 
afternoon or evening rain further west in CT and MA. 

KEY MESSAGE 2...Cool with widespread rain Sunday. 

Widespread warm frontal precipitation overspreads the region 
Saturday evening/night and continues all day Sunday as an area of 
low pressure traverses the region. It brings with it ample moisture 
(PWATs approaching 1.75", in the 99th percentile of climatology) and 
forcing with 35-50 kt LLJ which will also serve to make it gusty, 
especially over the waters. Before all is said and done, most 
locations are likely to pick up a half inch to an inch of rain by 
Sunday night. Sunday will also be the coldest day of the forecast, 
with rainy, cloudy conditions leading to highs in the 50s. 

KEY MESSAGE 3...Warming trend next week. Scattered showers lingering 
Monday with another chance of showers Wed.


The Memorial Day forecast is by no means settled, but it looks more 
favorable than Sunday at the very least. Some of the guidance 
including the ECMWF are a bit drier with the low exiting and drier 
conditions for Monday, while the GFS continues to be the wettest 
solution with the follow-up shortwave more robust leading to another 
wet day. Leaning on ensemble guidance for now, though the EPS and 
GEFS are also in different camps with a 10-20% and 40-50% chance of 
AOA 0.10" of rain Monday respectively. What is more certain is that 
Monday will be the start of a warm-up with zonal flow at 500 mb and 
a surge of 850 mb temps closer to 12-13C. This will mean highs back 
in the 70s and low 80s by Tuesday. Our next shortwave arrives around 
midweek but details are unclear at this point.

&&

.AVIATION /18Z FRIDAY THROUGH WEDNESDAY/...
Forecaster Confidence Levels...

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

18z TAF Update: 

This Afternoon through Saturday: High confidence.

VFR; mainly BKN/OVC high clouds thru Sat morning, then lowering
to a midlevel cloud deck rest of Sat. Winds through this
afternoon are easterly around 8-12 kt (gusts 20 kt SE New
England), with seabreezes turning light/variable by 03z. Winds
Sat return to ENE to ESE around 10 kt.

Saturday Night: High confidence in trends but moderate on
timing. 

Ceilings continue to lower in the VFR range, but rain and MVFR 
ceilings/visbys develop towards BDL by early Saturday evening, 
spreading east into ORH during the overnight. E to SE winds
increasing to around 10-15 kt. 

KBOS...High confidence in TAF.

KBDL...High confidence in TAF.

Outlook /Saturday through Wednesday/...

Saturday Night: VFR. Breezy. SHRA likely.

Sunday: Mainly VFR, with local IFR possible. Breezy. SHRA.

Sunday Night: MVFR/IFR conditions possible. Breezy. Chance
SHRA.

Memorial Day: Mainly VFR, with local IFR possible. Chance SHRA.

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

Tuesday: VFR.

&&

.MARINE...
Forecaster Confidence Levels...

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

Winds and seas to remain below Small Craft Advisory criteria
through at least midday Sat. NE to E winds through Fri night 
around 10-15 kt, with E/ESE winds at similar speeds for the 
southern waters, and seas 4 ft or less all waters. 

Into Sat of the holiday weekend, ESE winds around 15-20 kt with 
fringe small craft advisory winds/seas over the southern waters 
especially later in the day. Rain will also develop around late 
Sat/Sat night over the southern waters. Increasing, more solid- 
SCA E/SE winds 25-30 kt and seas 5-9 ft (higher southern waters 
over the open-ocean) then develop for Sunday for your holiday 
boating plans, to go along with steady rain which could reduce 
visibility.

Outlook /Saturday through Wednesday/...

Saturday: Winds less than 25 kt. 

Saturday Night: Low risk for Small Craft Advisory winds with
gusts up to 30 kt. Seas locally approaching 5 ft. Chance of
rain showers. 

Sunday: Moderate risk for Small Craft Advisory winds with gusts
up to 30 kt. Areas of rough seas. Rain showers. 

Sunday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of rough seas. Rain showers likely. 

Memorial Day: Winds less than 25 kt. Areas of rough seas.
Chance of rain showers. 

Monday Night: Winds less than 25 kt. Seas up to 5 ft. Slight
chance of rain showers. 

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

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 5 AM Sunday to 2 AM EDT Monday for 
     ANZ231.
     Small Craft Advisory from 2 AM Sunday to 5 AM EDT Monday for 
     ANZ232>235-237.
     Small Craft Advisory from 8 PM Saturday to 5 AM EDT Monday for 
     ANZ254>256.

&&

$$

DISCUSSION...BW
AVIATION...Loconto/Nash
MARINE...BW

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