Lexington Weather
Lexington, Massachusetts, USA
- Mist, Overcast
-
49.1°F / 9.5°C
-
48.0°F
- 96%
- Calm, 10-min avg: Calm, gust: 1 mph
- 2 miles
- 0.21 in
National Weather Service Forecast for:
Lexington, MA
Issued by:
National Weather Service Boston / Norton, MA
Overnight through Sunday
Point Forecast Updated Mon Oct 12, 2026 2:12am EDT
Overview:
- After a dry, warmer, and increasingly sunny Monday low clouds
and rain showers return Tuesday/Tuesday night with a rumble
of thunder possible.
- Drying out Wednesday and especially Thursday under high pressure.
- Next, stronger storm system arrives Friday into Saturday.
Overnight:
Rain Showers
Lo 52 °F
Rain showers and patchy fog. Cloudy, with a low around 52. Northeast wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
Columbus Day:
Patchy Fog then Mostly Sunny
Hi 70 °F
Patchy fog before 10am. Mostly sunny, with a high near 70. North wind 3 to 7 mph.
Monday Night:
Mostly Cloudy then Slight Chance Rain Showers
Lo 51 °F
A slight chance of rain showers after 2am. Mostly cloudy, with a low around 51. North wind 3 to 7 mph. Chance of precipitation is 20%.
Tuesday:
Chance Rain Showers
Hi 63 °F
A chance of rain showers before 9am, then a chance of rain showers and patchy fog. Cloudy, with a high near 63. Southeast wind around 7 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Tuesday Night:
Chance Showers And T-Storms
Lo 57 °F
Rain showers likely and patchy fog before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 57. Southwest wind around 8 mph. Chance of precipitation is 60%.
Wednesday:
Mostly Sunny
Hi 71 °F
Mostly sunny, with a high near 71. West wind 6 to 9 mph.
Wednesday Night:
Partly Cloudy
Lo 52 °F
Partly cloudy, with a low around 52. Northwest wind around 7 mph.
Thursday:
Sunny
Hi 63 °F
Sunny, with a high near 63. Northwest wind 3 to 9 mph.
Thursday Night:
Partly Cloudy then Chance Rain Showers
Lo 45 °F
A chance of rain showers after 1am. Partly cloudy, with a low around 45. Northeast wind around 3 mph. Chance of precipitation is 40%.
Friday:
Rain Showers
Hi 63 °F
Rain showers. Mostly cloudy, with a high near 63. South wind 5 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Friday Night:
Rain Showers
Lo 43 °F
Rain showers. Mostly cloudy, with a low around 43. West wind 9 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Saturday:
Slight Chance Rain Showers then Mostly Sunny
Hi 51 °F
A slight chance of rain showers before 10am. Mostly sunny, with a high near 51. Northwest wind around 17 mph, with gusts as high as 37 mph.
Saturday Night:
Partly Cloudy
Lo 34 °F
Partly cloudy, with a low around 34. Northwest wind 8 to 15 mph, with gusts as high as 30 mph.
Sunday:
Sunny
Hi 53 °F
Sunny, with a high near 53. West wind around 9 mph.
Today 4am through Tue 3pm EDT
Updated Mon Oct 12, 2026 2:12am EDT
4:00am
Dew Pt 53°F
N 7 mphPrecip: 32%
5:00am
Dew Pt 53°F
N 7 mphPrecip: 14%
6:00am
Dew Pt 52°F
N 7 mphPrecip: 9%
7:00am
Dew Pt 51°F
N 7 mphPrecip: 7%
8:00am
Dew Pt 52°F
N 7 mphPrecip: 2%
9:00am
Dew Pt 54°F
N 6 mphPrecip: 2%
10:00am
Dew Pt 56°F
N 6 mphPrecip: 2%
11:00am
Dew Pt 56°F
N 5 mphPrecip: 1%
12:00pm
Dew Pt 57°F
N 5 mphPrecip: 1%
1:00pm
Dew Pt 58°F
NW 5 mphPrecip: 1%
2:00pm
Dew Pt 59°F
NW 5 mphPrecip: 1%
3:00pm
Dew Pt 59°F
NW 5 mphPrecip: 1%
4:00pm
Dew Pt 59°F
NW 5 mphPrecip: 1%
5:00pm
Dew Pt 60°F
NW 3 mphPrecip: 2%
6:00pm
Dew Pt 59°F
NW 3 mphPrecip: 2%
7:00pm
Dew Pt 57°F
NW 3 mphPrecip: 3%
8:00pm
Dew Pt 56°F
NW 3 mphPrecip: 3%
9:00pm
Dew Pt 56°F
N 3 mphPrecip: 3%
10:00pm
Dew Pt 55°F
N 3 mphPrecip: 3%
11:00pm
Dew Pt 55°F
N 3 mphPrecip: 6%
12:00am
Dew Pt 54°F
NE 5 mphPrecip: 8%
1:00am
Dew Pt 54°F
NE 5 mphPrecip: 12%
2:00am
Dew Pt 53°F
NE 6 mphPrecip: 15%
3:00am
Dew Pt 53°F
NE 7 mphPrecip: 17%
4:00am
Dew Pt 52°F
NE 7 mphPrecip: 19%
5:00am
Dew Pt 52°F
NE 7 mphPrecip: 16%
6:00am
Dew Pt 51°F
NE 7 mphPrecip: 16%
7:00am
Dew Pt 51°F
NE 7 mphPrecip: 20%
8:00am
Dew Pt 52°F
NE 6 mphPrecip: 30%
9:00am
Dew Pt 53°F
NE 6 mphPrecip: 30%
10:00am
Dew Pt 54°F
E 7 mphPrecip: 31%
11:00am
Dew Pt 55°F
E 7 mphPrecip: 32%
12:00pm
Dew Pt 56°F
E 7 mphPrecip: 37%
1:00pm
Dew Pt 56°F
SE 7 mphPrecip: 42%
Rain: 0.01 in
2:00pm
Dew Pt 57°F
SE 6 mphPrecip: 53%
Rain: 0.01 in
3:00pm
Dew Pt 57°F
SE 6 mphPrecip: 52%
Rain: 0.01 in
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 120617
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
217 AM EDT Mon Oct 12 2026
.WHAT HAS CHANGED...
Sped up exit of rain this morning. Increased rain chances and winds
for the late week/weekend storm as confidence increases.
&&
.KEY MESSAGES...
- After a dry, warmer, and increasingly sunny Monday low clouds
and rain showers return Tuesday/Tuesday night with a rumble
of thunder possible.
- Drying out Wednesday and especially Thursday under high pressure.
- Next, stronger storm system arrives Friday into Saturday.
&&
.DISCUSSION...
KEY MESSAGE 1...After a dry and increasingly sunny Monday low clouds
and rain showers return Tuesday/Tuesday night with a rumble of
thunder possible.
Satellite shows the primary low impacting southern New England
spinning south of the islands this morning as it makes its way east.
Rain has already come to an end in parts of western MA as the mid
level dry slot moves in and this will continue to spread east,
shutting off precipitation from west to east by sunrise. A drier
atmospheric column makes a brief appearance overhead today as a
transient mid level ridge moves through. Thus, can expect clearing
skies today with plenty of sun, especially in the afternoon. This
ridging also brings a push of warmer air; 925 mb temps rising into
the 14-16C range together with full sun should make for high
temperatures 10-15 degrees warmer than Sunday, in the low 70s.
Monday night things change as a low center over the Great Lakes
approaches while high pressure sits over Nova Scotia. This initially
turns surface flow out of the northeast advecting cooler, saturated
air onshore making for low clouds with patchy drizzle to start
Tuesday. This brings highs back into the 60s. The warm front lifts
north Tuesday afternoon bringing scattered rain showers which
continue until the cold front drops through sometime Wednesday. SNE
will be socked in with clouds all of Tuesday and Tuesday night as
moisture remains trapped under a strong inversion. Could even see
some rumbles of thunder given some weak elevated instability above
that inversion. Elevated dewpoints will also lead to mild lows, in
the upper 50s and low 60s.
KEY MESSAGE 2...Drying out Wednesday and especially Thursday under
high pressure.
Wednesday things begin to dry out behind the cold front and the
inversion mixes out allowing for a mix of clouds and sun. However, a
stronger reinforcing cold front brings a much cooler and drier
airmass for Thursday as high pressure arrives. 925mb temps drop to
near 6C leading to highs only in the low 60s under mostly sunny
skies.
KEY MESSAGE 3...Next storm system arrives Friday into Saturday.
Our next storm, this one likely stronger than the mid week system,
originates out west Thursday. A low forms in the lee of the Rockies,
phasing with another low over the Great Lakes as it is swept east by
a northern stream trough. It then strengthens as it moves over or
near New England Friday into Saturday. This pulls a lot of moisture
into the region and with good dynamics including potential for a
strong 45-55kt LLJ and favorable placement beneath the RRQ of a
160kt upper jet, we should see a windy and very rainy Friday-
Saturday. Timing and other details are uncertain at this time, but
confidence in at least a decently strong weather system is
increasing.
&&
.AVIATION /06Z MONDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
06Z update...
Through 12Z: High confidence.
RA comes to an end by 12Z.
Monday: High confidence.
N winds 5-10 kts. IFR cigs to start, lifting to VFR from west
to east after 12Z (western MA/CT) to 19Z (Cape Cod and
Islands).
Monday night: High confidence.
Light winds increasing and becoming NE 5-10 kts toward 12Z.
Scattered SHRA/DZ moves in with IFR/MVFR.
Tuesday: High confidence.
IFR/MVFR. E winds becoming S 5-10kts in scattered SHRA.
KBOS Terminal...High confidence in trends, moderate confidence
in timing. Biggest question will be how quickly RA ends and cigs
lift..most likely rain ending by 11Z and VFR by 15z.
KBDL Terminal...High confidence in TAF.
Outlook /Tuesday Night through Friday/...
Tuesday Night: Mainly VFR, with local IFR possible. Breezy.
Chance SHRA, slight chance TSRA.
Wednesday through Thursday: VFR. Breezy.
Thursday Night: VFR. Chance SHRA.
Friday: VFR. Windy with local gusts up to 30 kt. SHRA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Monday: High confidence.
The remnants of Hurricane Isaias are currently working their
way across the southern waters. Seas 5 to 10 ft and wind gusts
20 to 25 knots. SCAs are in effect for the southern waters,
15-20 kts with gusts to 25kt possible, especially on the
southern outer waters. Seas 6-9 ft on southern waters, 3-6 ft on
the eastern waters.
Monday night: High confidence.
NE winds 10-15 kts with gusts 20-25 kts on the eastern waters.
Seas 3-5 ft.
Tuesday: High confidence.
SE winds 10-15 kts with increasing gusts to 20 kts. Seas 3-5 ft.
RA over the eastern waters.
Outlook /Tuesday Night through Friday/...
Tuesday Night: Moderate risk for Small Craft Advisory winds
with gusts up to 25 kt. Seas up to 5 ft. Chance of rain
showers, slight chance of thunderstorms.
Wednesday: Low risk for Small Craft Advisory winds with gusts
up to 25 kt. Areas of rough seas.
Wednesday Night: Winds less than 25 kt. Seas up to 5 ft. Slight
chance of rain showers.
Thursday: Winds less than 25 kt. Seas up to 5 ft.
Thursday Night: Winds less than 25 kt. Areas of seas
approaching 5 ft. Chance of rain showers.
Friday: Moderate risk for Small Craft Advisory winds with gusts
up to 30 kt. Local rough seas. Rain showers likely, slight
chance of thunderstorms.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 11 PM EDT this evening for ANZ235-
237.
Small Craft Advisory from 8 PM this evening to 2 AM EDT
Wednesday for ANZ250.
Small Craft Advisory until 8 PM EDT Wednesday for ANZ254.
Small Craft Advisory until 8 AM EDT Tuesday for ANZ255-256.
&&
$$
DISCUSSION...BW
AVIATION...BW
MARINE...BW
Meta data
Point forecast:
https://api.weather.gov/gridpoints/BOX/65,104/forecast
Zone forecast:
https://api.weather.gov/zones/forecast/MAZ014/forecast
Hourly forecast:
https://api.weather.gov/gridpoints/BOX/65,104/forecast/hourly
Hourly detail:
https://api.weather.gov/gridpoints/BOX/65,104
Point detail:
https://api.weather.gov/points/42.4399,-71.2405
Alerts:
https://api.weather.gov/alerts?status=actual&point=42.4399,-71.2405
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