Lexington Weather

Current Conditions [‒] Current Conditions [+]

36.0°F Colder than last hour.

2.2°C

Cold

Clear

Tonight: Lo 35 °F

Monday: Hi 49 °F

Dew Point: 34.2°F Decreased 0.9°F since last hour.

Humidity: 93%

Air Quality Index: 25

Good

(Ozone)

Barometer: 29.93 in Rising 0.02 inHg/hr

1014 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.11 in

Rain Saturday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Tonight, Monday, & Monday Night through Sunday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sun Apr 19, 2026 9:56pm EDT

Tonight:

Mostly Clear

Lo 35 °F

Mostly clear, with a low around 35. West wind 6 to 9 mph.

Monday:

Mostly Sunny then Chance Rain Showers

Hi 49 °F

A chance of rain showers after 2pm. Mostly sunny, with a high near 49. West wind around 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

Monday Night:

Slight Chance Rain Showers then Mostly Cloudy

Lo 33 °F

A slight chance of rain showers before 8pm. Mostly cloudy, with a low around 33. Northwest wind around 7 mph. Chance of precipitation is 20%.

Tuesday:

Mostly Sunny

Hi 50 °F

Mostly sunny, with a high near 50. Northeast wind around 6 mph.

Tuesday Night:

Partly Cloudy then Chance Rain Showers

Lo 37 °F

A chance of rain showers after 2am. Partly cloudy, with a low around 37. South wind around 7 mph. Chance of precipitation is 30%.

Wednesday:

Slight Chance Rain Showers then Mostly Cloudy

Hi 52 °F

A slight chance of rain showers before 8am. Mostly cloudy, with a high near 52. South wind around 8 mph. Chance of precipitation is 20%.

Wednesday Night:

Mostly Cloudy

Lo 39 °F

Mostly cloudy, with a low around 39. Southwest wind around 7 mph.

Thursday:

Partly Sunny

Hi 61 °F

Partly sunny, with a high near 61. Northwest wind 5 to 8 mph.

Thursday Night:

Mostly Cloudy

Lo 40 °F

Mostly cloudy, with a low around 40. Northwest wind around 7 mph.

Friday:

Mostly Sunny

Hi 59 °F

Mostly sunny, with a high near 59. North wind around 7 mph.

Friday Night:

Slight Chance Rain Showers

Lo 41 °F

A slight chance of rain showers after 9pm. Partly cloudy, with a low around 41. Northeast wind 3 to 7 mph.

Saturday:

Chance Rain Showers

Hi 59 °F

A chance of rain showers. Partly sunny, with a high near 59. Northeast wind 5 to 8 mph. Chance of precipitation is 30%.

Saturday Night:

Chance Rain Showers

Lo 42 °F

A chance of rain showers. Mostly cloudy, with a low around 42. South wind 3 to 7 mph. Chance of precipitation is 40%.

Sunday:

Chance Rain Showers

Hi 58 °F

A chance of rain showers. Partly sunny, with a high near 58. Northeast wind around 7 mph.

FULL FORECAST

NWS Hourly Forecast -
Tonight 10pm through Tue 9am

Issued by:
National Weather Service Boston / Norton, MA
Updated Sun Apr 19, 2026 9:56pm EDT

10:00pm

Mostly Clear

39°F
Dew Pt 34°F
Wind Chill: 33°F
Wind from W

W 9 mph
Precip: 0%

11:00pm

Mostly Clear

38°F
Dew Pt 32°F
Wind Chill: 33°F
Wind from W

W 7 mph
Precip: 0%

Mon
12:00am

Clear

38°F
Dew Pt 32°F
Wind Chill: 33°F
Wind from W

W 7 mph
Precip: 0%

Mon
1:00am

Clear

37°F
Dew Pt 31°F
Wind Chill: 32°F
Wind from W

W 7 mph
Precip: 0%

Mon
2:00am

Clear

37°F
Dew Pt 30°F
Wind Chill: 32°F
Wind from W

W 6 mph
Precip: 0%

Mon
3:00am

Clear

35°F
Dew Pt 29°F
Wind Chill: 30°F
Wind from W

W 6 mph
Precip: 0%

Mon
4:00am

Clear

35°F
Dew Pt 29°F
Wind Chill: 30°F
Wind from W

W 6 mph
Precip: 0%

Mon
5:00am

Clear

35°F
Dew Pt 28°F
Wind Chill: 30°F
Wind from W

W 6 mph
Precip: 0%

Mon
6:00am

Sunny

35°F
Dew Pt 29°F
Wind Chill: 30°F
Wind from W

W 6 mph
Precip: 1%

Mon
7:00am

Sunny

36°F
Dew Pt 29°F
Wind Chill: 31°F
Wind from W

W 6 mph
Precip: 1%

Mon
8:00am

Sunny

39°F
Dew Pt 30°F
Wind Chill: 35°F
Wind from W

W 6 mph
Precip: 2%

Mon
9:00am

Mostly Sunny

41°F
Dew Pt 30°F
Wind Chill: 37°F
Wind from W

W 6 mph
Precip: 3%

Mon
10:00am

Mostly Sunny

44°F
Dew Pt 29°F
Wind Chill: 41°F
Wind from W

W 6 mph
Precip: 3%

Mon
11:00am

Partly Sunny

46°F
Dew Pt 29°F
Wind Chill: 43°F
Wind from W

W 6 mph
Precip: 6%

Mon
12:00pm

Partly Sunny

47°F
Dew Pt 29°F
Wind Chill: 44°F
Wind from W

W 6 mph
Precip: 11%

Mon
1:00pm

Partly Sunny

49°F
Dew Pt 28°F
Wind Chill: 46°F
Wind from W

W 7 mph
Precip: 13%

Mon
2:00pm

Slight Chance Rain Showers

49°F
Dew Pt 28°F
Wind Chill: 46°F
Wind from W

W 7 mph
Precip: 24%

Mon
3:00pm

Chance Rain Showers

49°F
Dew Pt 29°F
Wind Chill: 46°F
Wind from NW

NW 7 mph
Precip: 27%
Rain: 0.01 in

Mon
4:00pm

Chance Rain Showers

49°F
Dew Pt 29°F
Wind Chill: 46°F
Wind from NW

NW 7 mph
Precip: 25%
Rain: 0.01 in

Mon
5:00pm

Slight Chance Rain Showers

47°F
Dew Pt 29°F
Wind Chill: 44°F
Wind from NW

NW 7 mph
Precip: 23%

Mon
6:00pm

Slight Chance Rain Showers

47°F
Dew Pt 30°F
Wind Chill: 44°F
Wind from NW

NW 6 mph
Precip: 19%

Mon
7:00pm

Slight Chance Rain Showers

45°F
Dew Pt 29°F
Wind Chill: 42°F
Wind from NW

NW 6 mph
Precip: 15%

Mon
8:00pm

Mostly Cloudy

42°F
Dew Pt 30°F
Wind Chill: 38°F
Wind from N

N 6 mph
Precip: 14%

Mon
9:00pm

Mostly Cloudy

40°F
Dew Pt 28°F
Wind Chill: 36°F
Wind from N

N 6 mph
Precip: 13%

Mon
10:00pm

Mostly Cloudy

39°F
Dew Pt 27°F
Wind Chill: 35°F
Wind from N

N 6 mph
Precip: 12%

Mon
11:00pm

Mostly Cloudy

38°F
Dew Pt 27°F
Wind Chill: 34°F
Wind from N

N 6 mph
Precip: 11%

Tue
12:00am

Mostly Cloudy

37°F
Dew Pt 26°F
Wind Chill: 32°F
Wind from N

N 7 mph
Precip: 10%

Tue
1:00am

Mostly Cloudy

36°F
Dew Pt 24°F
Wind Chill: 30°F
Wind from N

N 7 mph
Precip: 9%

Tue
2:00am

Mostly Cloudy

35°F
Dew Pt 23°F
Wind Chill: 30°F
Wind from N

N 6 mph
Precip: 8%

Tue
3:00am

Partly Cloudy

34°F
Dew Pt 22°F
Wind Chill: 29°F
Wind from N

N 6 mph
Precip: 6%

Tue
4:00am

Partly Cloudy

33°F
Dew Pt 22°F
Wind Chill: 28°F
Wind from N

N 6 mph
Precip: 5%

Tue
5:00am

Partly Cloudy

33°F
Dew Pt 22°F
Wind Chill: 28°F
Wind from N

N 6 mph
Precip: 3%

Tue
6:00am

Mostly Sunny

33°F
Dew Pt 22°F
Wind Chill: 28°F
Wind from N

N 6 mph
Precip: 2%

Tue
7:00am

Mostly Sunny

34°F
Dew Pt 21°F
Wind Chill: 29°F
Wind from N

N 6 mph
Precip: 1%

Tue
8:00am

Sunny

35°F
Dew Pt 21°F
Wind Chill: 30°F
Wind from N

N 6 mph
Precip: 0%

Tue
9:00am

Sunny

38°F
Dew Pt 21°F
Wind Chill: 34°F
Wind from N

N 5 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 192334
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
734 PM EDT Sun Apr 19 2026

.WHAT HAS CHANGED...
Minor adjustments made to the aviation forecast, with respect 
to flight categories, otherwise the core forecast is on track.

&&

.KEY MESSAGES...

- Isolated T-Showers and rain through this afternoon and then  
  clearing tonight. Becoming chilly for Monday morning.

- Cool with shower chances on Patriot's Day. Overnight turning  
  cold with subfreezing conditions across much of SNE.

- Cooler again for Tuesday before a return of seasonable
  temperatures Wednesday and the rest of the week

&&

.DISCUSSION...
KEY MESSAGE 1...Isolated T-Showers and rain through this 
afternoon and then clearing tonight. Becoming chilly for Monday 
morning. 

Ahead of an approaching cold front convective showers 
developing in eastern MA and RI. While not severe, these showers
have a history of lightning and pea sized hail. Luckily, those 
weak thunder showers are short-lived with a more stratiform 
light rain associated with the cold front. The system is fairly 
progressive, anticipating the rain will end from west to east 
between 5pm and 8pm. As mentioned, cannot rule out a few wet 
snowflakes mixing in the highest elevation of northern and 
western MA. Otherwise, a brief period of gusty wind from the 
W-WNW 20 to 30 mph with the frontal passage. Tonight, clear 
skies and decreasing winds less than 10 mph. Chilly, lows fall 
into the lower to mid-30s, with northern Worcester County and 
the eastern slopes of the Berkshires in the upper 20s. 

KEY MESSAGE 2...Cool with shower chances on Patriot's Day. 
Overnight turning cold with subfreezing conditions across much 
of SNE.

Patriot's Day is a chilly one, there is no doubt about that. 
Falling 500mb heights from a mid-level trough brings much colder
air into southern New England. 925mb temperatures Monday 
afternoon are around 0C to -2C, thus afternoon temperatures 
range between the low-50s and the upper-40s. Looking back at the
high temperature since 2020, the forecast high for tomorrow 
lines up, of the six years, four of those years have had 
temperatures in the low to mid-50s. For those curious minded 
people, the highest temperatures on Patriot's Day occurred in 
2012 with a high of 87F and coldest high of 38F in 1925 and 
1926. 

Sensible weather, scattered showers from a weak low pressure 
passing south of New England's waters. However, would like to 
reiterate not every town will experience showers due to the 
scattered nature. Wind is from the W early in the morning, then 
NW early afternoon at 10-15 mph. There is some uncertainty, but 
wind could shift to the N by the evening which could drain 
colder air down from northern New England and any lingering rain
showers could become a light snow shower. Have lower confidence
in this happening, though it is an outlying, albeit lower 
chance. 

Turning even colder Monday night into Tuesday with morning lows
in the low-30s to upper-20s across the entire region. While 
early last week felt more like summer, it's not uncommon for 
subfreezing conditions during mid to late April. In fact, per 
climo, the average last freeze is at/or around May 1st for most 
of southern New England. This is why Frost or Freeze headlines 
have not been issued from our office, at this time. That said, 
if you have already place sensitive plants outside. It would be 
wise to cover or bring inside.

KEY MESSAGE 3...Cooler Tuesday before a return of seasonable 
temperatures Wednesday and the rest of the week.

Sharply colder Tuesday morning after a night of effective 
radiational cooling Monday night. Expecting lows in the lower to
mid 20s across the interior and closer to freezing along the 
coast. A cool but otherwise pleasant day Tuesday. 925mb temps 
struggle to warm above -5C, so highs will struggle to warm much 
above 50 degrees for most locations. Some showers are possible 
Wednesday morning as a weak boundary moves through the region. 
Expecting mainly rain showers, but a few wet snowflakes are 
possible across the interior. More seasonal temperatures make a 
return Wednesday afternoon as the core of the upper trough moves
offshore. 925 mb temperatures recover to around 5C, supporting 
more seasonable highs in the upper 50s/low 60s. NW flow makes a 
return towards Thursday/Friday in the wake of another front 
passing through sometime late Wednesday, and high pressure 
builds back in as ridging approaches, which should keep the 
region dry. Still seeing some disagreement with the west/east 
positioning of a cutoff upper level trough over the Canadian 
Maritimes Thursday and Friday. The placement of this feature 
will strongly influence weather later this week. A closer 
position brings much cooler and unsettled weather with a chance 
for showers Thurs/Friday. Believe the NBM has a fairly good 
handle and splits the difference with mostly cloudy skies and 
highs in the lower to mid 60s. Next chance for rain arrives 
Saturday with an approaching frontal system.

&&

.AVIATION /00Z MONDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...

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

00z TAF Update:

Through 06z: High Confidence. 

VFR. Diminishing wind gusts. W wind 5-10 kts. 

Monday...Moderate confidence.

Low-end VFR ceilings (040 to 060) along with sct'd showers. Cannot 
rule out wet snow flakes mixing in after sunset. WNW to NW wind at 
10-15 kts. 

Monday Night...High confidence.

VFR. Skies becoming clear, NW wind becomes NNW to N 5-10 kts. 

KBOS Terminal... Moderate Confidence in TAF. 

Sct'd convective showers could produce an isolated lightning 
strike near KBOS over the next 90 minutes, ending around 1830z. 
Gusty W-WNW winds increase as well, gusting 25-30 knots through 
00-02z. There after becoming VFR with a W wind around 8-10 kts.

KBDL Terminal... High Confidence in TAF.

Outlook /Monday Night through Friday/...

Tuesday: VFR. 

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

Wednesday: Mainly VFR, with local IFR possible. 

Wednesday Night through Friday: VFR.

&&

.MARINE...
Forecaster Confidence Levels...

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

Tonight through Monday Night: High Confidence.

Strong cold front brings SCA conditions and rain, seas 3-5 
feet, and W-NW gust up to 30 knots for all of the waters this 
evening and ending by early Monday morning. Winds shift NW and 
ease following this frontal passage late tonight. Winds shift W 
over the southern waters and more S over the E/NE waters Monday,
falling between 10-15 kts, eventually winds shift to the NNW/N 
by Monday night. Lastly, seas settle to 2-3 ft.

Outlook /Monday Night through Friday/...

Tuesday: Winds less than 25 kt. 

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

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

Wednesday Night through Friday: Winds less than 25 kt.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 8 PM EDT this evening for 
     ANZ230>237-250-251.
     Small Craft Advisory until 11 PM EDT this evening for 
     ANZ254>256.

&&

$$

DISCUSSION...Dooley/FT
AVIATION...Dooley/FT
MARINE...Dooley/FT

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