Lexington Weather

Current Conditions [‒] Current Conditions [+]

47.5°F Warmer than last hour.

8.6°C

Chilly

Overcast

Today: Hi 52 °F

Tonight: Lo 30 °F

Dew Point: 32.5°F Increased 0.1°F since last hour .

Humidity: 56% Decreased 3.0% since last hour.

Air Quality Index: 33

Good

(Ozone)

Barometer: 30.06 in S

1018 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Sunday: 0.11 in

Visibility: 10 miles

Wind:

Now: 1 mph

Avg: 1 mph

Gusts: 3 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Today, Tonight, & Tuesday through Sunday Night

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Mon Apr 20, 2026 10:57am EDT

Today:

Partly Sunny

Hi 52 °F

Partly sunny, with a high near 52. West wind around 12 mph.

Tonight:

Slight Chance Light Rain then Mostly Cloudy

Lo 30 °F

A slight chance of rain before 8pm. Mostly cloudy, with a low around 30. Northwest wind 5 to 9 mph. Chance of precipitation is 20%.

Tuesday:

Mostly Sunny

Hi 50 °F

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

Tuesday Night:

Partly Cloudy then Slight Chance Rain Showers

Lo 36 °F

A slight chance of rain showers after 4am. Partly cloudy, with a low around 36. South wind around 7 mph. Chance of precipitation is 20%.

Wednesday:

Slight Chance Rain Showers

Hi 51 °F

A slight chance of rain showers before 2pm. Mostly cloudy, with a high near 51. 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 3 to 7 mph.

Thursday:

Partly Sunny

Hi 59 °F

Partly sunny, with a high near 59. Northwest wind 3 to 8 mph.

Thursday Night:

Partly Cloudy

Lo 40 °F

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

Friday:

Mostly Sunny

Hi 58 °F

Mostly sunny, with a high near 58. North wind around 7 mph.

Friday Night:

Partly Cloudy

Lo 40 °F

Partly cloudy, with a low around 40. Northeast wind around 6 mph.

Saturday:

Mostly Sunny then Slight Chance Rain Showers

Hi 56 °F

A slight chance of rain showers after noon. Mostly sunny, with a high near 56. Northeast wind 3 to 7 mph.

Saturday Night:

Chance Rain Showers

Lo 41 °F

A chance of rain showers. Mostly cloudy, with a low around 41. South wind around 6 mph. Chance of precipitation is 30%.

Sunday:

Chance Rain Showers

Hi 59 °F

A chance of rain showers. Partly sunny, with a high near 59. East wind 3 to 7 mph. Chance of precipitation is 30%.

Sunday Night:

Chance Rain Showers

Lo 42 °F

A chance of rain showers. Mostly cloudy, with a low around 42. East wind around 6 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 12pm through Tue 11pm

Issued by:
National Weather Service Boston / Norton, MA
Updated Mon Apr 20, 2026 10:57am EDT

12:00pm

Partly Sunny

48°F
Dew Pt 28°F
Wind Chill: 43°F
Wind from W

W 10 mph
Precip: 4%

1:00pm

Partly Sunny

50°F
Dew Pt 26°F
Wind Chill: 46°F
Wind from W

W 10 mph
Precip: 7%

2:00pm

Mostly Cloudy

50°F
Dew Pt 26°F
Wind Chill: 46°F
Wind from W

W 12 mph
Precip: 8%

3:00pm

Partly Sunny

50°F
Dew Pt 26°F
Wind Chill: 46°F
Wind from W

W 10 mph
Precip: 8%

4:00pm

Partly Sunny

51°F
Dew Pt 25°F
Wind from W

W 10 mph
Precip: 9%

5:00pm

Mostly Cloudy

50°F
Dew Pt 25°F
Wind Chill: 46°F
Wind from W

W 9 mph
Precip: 14%

6:00pm

Slight Chance Light Rain

48°F
Dew Pt 26°F
Wind Chill: 44°F
Wind from NW

NW 9 mph
Precip: 15%

7:00pm

Slight Chance Light Rain

45°F
Dew Pt 25°F
Wind Chill: 41°F
Wind from NW

NW 8 mph
Precip: 16%

8:00pm

Mostly Cloudy

43°F
Dew Pt 26°F
Wind Chill: 39°F
Wind from NW

NW 7 mph
Precip: 12%

9:00pm

Mostly Cloudy

40°F
Dew Pt 25°F
Wind Chill: 36°F
Wind from N

N 6 mph
Precip: 8%

10:00pm

Mostly Cloudy

39°F
Dew Pt 25°F
Wind Chill: 34°F
Wind from NW

NW 7 mph
Precip: 6%

11:00pm

Mostly Cloudy

38°F
Dew Pt 25°F
Wind Chill: 33°F
Wind from N

N 7 mph
Precip: 4%

Tue
12:00am

Mostly Cloudy

37°F
Dew Pt 22°F
Wind Chill: 32°F
Wind from N

N 7 mph
Precip: 3%

Tue
1:00am

Partly Cloudy

35°F
Dew Pt 20°F
Wind Chill: 29°F
Wind from N

N 7 mph
Precip: 2%

Tue
2:00am

Partly Cloudy

34°F
Dew Pt 19°F
Wind Chill: 28°F
Wind from N

N 7 mph
Precip: 2%

Tue
3:00am

Partly Cloudy

33°F
Dew Pt 19°F
Wind Chill: 28°F
Wind from N

N 6 mph
Precip: 1%

Tue
4:00am

Partly Cloudy

33°F
Dew Pt 19°F
Wind Chill: 28°F
Wind from N

N 6 mph
Precip: 1%

Tue
5:00am

Partly Cloudy

32°F
Dew Pt 19°F
Wind Chill: 27°F
Wind from N

N 5 mph
Precip: 1%

Tue
6:00am

Mostly Sunny

32°F
Dew Pt 19°F
Wind Chill: 27°F
Wind from N

N 5 mph
Precip: 0%

Tue
7:00am

Mostly Sunny

33°F
Dew Pt 19°F
Wind Chill: 29°F
Wind from N

N 5 mph
Precip: 0%

Tue
8:00am

Sunny

36°F
Dew Pt 18°F
Wind Chill: 32°F
Wind from N

N 5 mph
Precip: 0%

Tue
9:00am

Sunny

38°F
Dew Pt 17°F
Wind Chill: 34°F
Wind from N

N 5 mph
Precip: 0%

Tue
10:00am

Sunny

41°F
Dew Pt 16°F
Wind Chill: 39°F
Wind from N

N 3 mph
Precip: 0%

Tue
11:00am

Sunny

44°F
Dew Pt 17°F
Wind Chill: 42°F
Wind from N

N 3 mph
Precip: 1%

Tue
12:00pm

Sunny

46°F
Dew Pt 18°F
Wind Chill: 45°F
Wind from NE

NE 3 mph
Precip: 1%

Tue
1:00pm

Mostly Sunny

48°F
Dew Pt 18°F
Wind Chill: 47°F
Wind from SE

SE 3 mph
Precip: 1%

Tue
2:00pm

Mostly Sunny

49°F
Dew Pt 18°F
Wind Chill: 47°F
Wind from S

S 5 mph
Precip: 1%

Tue
3:00pm

Mostly Sunny

50°F
Dew Pt 18°F
Wind Chill: 48°F
Wind from S

S 5 mph
Precip: 1%

Tue
4:00pm

Mostly Sunny

50°F
Dew Pt 19°F
Wind Chill: 48°F
Wind from SE

SE 6 mph
Precip: 1%

Tue
5:00pm

Mostly Sunny

49°F
Dew Pt 20°F
Wind Chill: 47°F
Wind from SE

SE 6 mph
Precip: 1%

Tue
6:00pm

Partly Cloudy

48°F
Dew Pt 22°F
Wind Chill: 45°F
Wind from SE

SE 7 mph
Precip: 2%

Tue
7:00pm

Partly Cloudy

46°F
Dew Pt 23°F
Wind Chill: 42°F
Wind from SE

SE 7 mph
Precip: 2%

Tue
8:00pm

Mostly Clear

44°F
Dew Pt 25°F
Wind Chill: 41°F
Wind from SE

SE 6 mph
Precip: 2%

Tue
9:00pm

Mostly Clear

42°F
Dew Pt 26°F
Wind Chill: 38°F
Wind from SE

SE 6 mph
Precip: 2%

Tue
10:00pm

Partly Cloudy

40°F
Dew Pt 27°F
Wind Chill: 36°F
Wind from S

S 6 mph
Precip: 2%

Tue
11:00pm

Partly Cloudy

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

S 6 mph
Precip: 3%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 201145
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
745 AM EDT Mon Apr 20 2026

.WHAT HAS CHANGED...
General forecast trends remain unchanged.

&&

.KEY MESSAGES...

- Cool today with some scattered shower chances. Otherwise, dry 
  and turning even colder overnight.

- Seasonable temperatures return Wednesday and through the rest 
  of the week.

- Some uncertainty remains for the latter half of the week
  regarding the chance for more unsettled conditions.

&&

.DISCUSSION...
KEY MESSAGE 1...Cool today with some scattered shower chances. 
Otherwise, dry and turning even colder overnight.

An upper level trough settles overhead today, which will lead to 
colder air making its way into southern New England. 925 mb 
temperatures today struggle to get above 0C, supportive of highs 
only in the low 50s and upper 40s. Winds will be breezy and mostly 
NW with occasional gusts in the afternoon around 20-25 MPH. They 
will start to diminish as high pressure approaches from the west 
heading into tonight. Even with the aforementioned approaching high 
pressure, a weak low pressure passing through the region today will 
bring increased cloud cover and some scattered showers. Any showers 
that do pop up are expected more so in the afternoon hours today, 
and the highest chances are primarily centered around the northern 
MA border and the south coast. Eastern MA could see some as well, 
primarily in the later afternoon hours into the evening. With 
regards to any chances for thunder, chances are quite low. MUCAPE 
values in high res guidance are only around 200 J/kg along the south 
coast and generally north of MA through much of the afternoon, then 
shifting towards eastern MA towards 6 PM. HREF thunder probs are 
also below 10 percent. Some convective showers cannot be completely 
ruled out, but confidence in embedded thunder or lightning 
developing is low at this time. Outside these rain chances, 
conditions will be very dry as dew points are around 20 degrees 
lower than the expected air temperatures today.

Tonight, it gets even colder as we have more of a radiational 
cooling setup. As the colder air builds in, any lingering showers 
may also mix with wet snowflakes, but chances for that remain very 
low. Skies clear and winds shift more N and go light overnight. The 
colder airmass remains affixed overhead, with 925 mb temperatures 
falling to around -5C overnight. In the interior, lows may dip into 
the low 20s, particularly in the higher elevations. Subfreezing 
temperatures are expected across southern New England, aside from 
more coastal areas. However, it will still get close to freezing in 
those areas, bottoming out in the mid 30s.

Temperatures remain cool for Tuesday, though will steadily be 
improving as the upper level trough and associated cold airmass 
progress offshore. This improvement will be more noticeable Tuesday 
night as lows will generally be in the 30s across the region. High 
pressure builds in, maintaining dry conditions.

KEY MESSAGE 2...Seasonable temperatures return Wednesday and through 
the rest of the week

Some showers are a possibility once again heading into Wednesday as 
a weak boundary approaches, but more seasonable temperatures make a 
return as the trough from early this week exits. 925 mb temperatures 
recover to around 5C, supporting more seasonable highs in the low to 
mid 50s. NW flow makes a return heading into Thursday in the wake of 
that weak boundary, and high pressure builds back in then as upper 
level ridging approaches, keeping southern New England dry. Highs 
for Thursday and Friday should also remain seasonable barring any 
drastic changes in upcoming forecasts.

KEY MESSAGE 3...Some uncertainty remains for the latter half of the 
week regarding the chance for more unsettled conditions

There are still some discrepancies regarding the placement of the 
western edge of the upper level trough that becomes centered over 
the Canadian Maritimes, which may affect how far east warmer 
temperatures aloft make it for the second half of the week. These 
would, in turn, affect highs later this week and into the weekend. 
This also impacts when and where we could see some more unsettled 
conditions make a return during that same time period. The ridge 
progressing east approaches southern New England Friday, but 
depending on that upper level low and how far west it lingers, we 
may see some showers and cooler conditions. Aside from that, another 
frontal system arriving Saturday may provide our next chance for 
some rain.

&&

.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 in showers. High confidence in 
overall trends. 

VFR, though ceilings will be closer to 040-060. Scattered
showers possible, but exact location is lower confidence. 
Cannot rule out wet snow flakes mixing in any lingering showers 
after sunset, particularly in the interior. WNW to NW wind at 
10-15 kts, gusting occasionally to 18-20 kts for some terminals
in the afternoon.

Tonight...High confidence.

VFR. Skies becoming clear, NW wind becomes NNW to N 5-10 kts and
lighter heading into Tue AM.

Tuesday...High confidence.

VFR. Light NNE east winds to start 5-10kts, becoming light SW
for interior terminals in afternoon. It may stay more light
easterly for the east coast terminals (BOS, Cape/Islands). 

KBOS Terminal... Moderate Confidence in TAF. Low probability for
showers to develop at/near the terminal later this afternoon,
but cannot be ruled out entirely.

KBDL Terminal... High Confidence in TAF.

Outlook /Tuesday Night through Friday/...

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

Wednesday: Mainly VFR, with local IFR possible. Slight chance
SHRA.

Wednesday Night through Friday: VFR. 

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Tuesday...High Confidence.

Winds remain mostly W over the southern waters and more S over 
the E/NE waters today, falling between 10-15 kts. Tonight, they
become N between 10-20 kt. Winds slacken once again for Tuesday,
falling to below 10 kt in the afternoon and gradually shifting
more S to SW heading into Tuesday night. Seas through this
period should remain between 2-3 ft with localized areas in the
outer waters of 4 ft possible late tonight.

Outlook /Tuesday Night through Friday/...

Tuesday Night: Winds less than 25 kt. 

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

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

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

Thursday Night through Friday: Winds less than 25 kt. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.

&&

$$

DISCUSSION...Hrencecin
AVIATION...Hrencecin/Mensch
MARINE...Hrencecin

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