Lexington Weather
Lexington, Massachusetts, USA
- Overcast
-
59.7°F / 15.4°C
-
53.2°F
-
79%
- Calm, 10-min avg: Calm, gust: None
- 10 miles
- 0.00 in
Current Conditions [‒] Current Conditions [+]
59.7°F
15.4°C
Cool
Overcast
This Afternoon: Hi 63 °F
Tonight: Lo 49 °F
Dew Point:
53.2°F
Humidity:
79%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Saturday: 0.00 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
Forecast [‒] Forecast [+]
NWS Weather Forecast -
This Afternoon,
Tonight,
&
Monday
through
Saturday Night
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sun Oct 4, 2026 3:28pm EDT
Overview:
- Scattered showers this afternoon into early morning Monday.
- A sharp temperature drop is then expected for the start of the week followed by a return to dry, fall-like conditions.
This Afternoon:
Slight Chance Rain Showers
Hi 63 °F
A slight chance of rain showers after 5pm. Cloudy, with a high near 63. East wind around 7 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Tonight:
Chance Rain Showers then Mostly Cloudy
Lo 49 °F
A chance of rain showers before 11pm. Mostly cloudy, with a low around 49. North wind 1 to 5 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
Monday:
Sunny
Hi 66 °F
Sunny, with a high near 66. West wind 3 to 13 mph, with gusts as high as 28 mph.
Monday Night:
Clear
Lo 40 °F
Clear, with a low around 40. West wind around 10 mph, with gusts as high as 23 mph.
Tuesday:
Sunny
Hi 58 °F
Sunny, with a high near 58. West wind around 10 mph, with gusts as high as 22 mph.
Tuesday Night:
Clear
Lo 38 °F
Clear, with a low around 38. West wind 3 to 7 mph.
Wednesday:
Sunny
Hi 66 °F
Sunny, with a high near 66. Southwest wind 3 to 10 mph.
Wednesday Night:
Mostly Clear
Lo 50 °F
Mostly clear, with a low around 50. Southwest wind around 9 mph.
Thursday:
Sunny
Hi 71 °F
Sunny, with a high near 71. Southwest wind 7 to 10 mph, with gusts as high as 21 mph.
Thursday Night:
Mostly Clear
Lo 49 °F
Mostly clear, with a low around 49. West wind around 6 mph.
Friday:
Sunny
Hi 67 °F
Sunny, with a high near 67. West wind 6 to 9 mph.
Friday Night:
Mostly Clear
Lo 48 °F
Mostly clear, with a low around 48. West wind around 7 mph.
Saturday:
Sunny
Hi 63 °F
Sunny, with a high near 63. Northwest wind around 9 mph.
Saturday Night:
Mostly Clear
Lo 43 °F
Mostly clear, with a low around 43. Northwest wind 3 to 7 mph.
NWS Hourly Forecast -
Today 5pm through Tue 4am
Issued by:
National Weather Service Boston / Norton, MA
Updated Sun Oct 4, 2026 3:28pm EDT
5:00pm
Dew Pt 52°F
E 6 mphPrecip: 19%
Rain: 0.01 in
6:00pm
Dew Pt 53°F
E 5 mphPrecip: 21%
Rain: 0.01 in
7:00pm
Dew Pt 53°F
E 3 mphPrecip: 25%
Rain: 0.02 in
8:00pm
Dew Pt 53°F
E 3 mphPrecip: 28%
Rain: 0.03 in
9:00pm
Dew Pt 53°F
NE 2 mphPrecip: 25%
Rain: 0.03 in
10:00pm
Dew Pt 53°F
N 1 mphPrecip: 23%
Rain: 0.02 in
11:00pm
Dew Pt 53°F
N 1 mphPrecip: 13%
Rain: 0.01 in
12:00am
Dew Pt 53°F
N 1 mphPrecip: 11%
Rain: 0.01 in
1:00am
Dew Pt 52°F
N 1 mphPrecip: 4%
2:00am
Dew Pt 52°F
NW 2 mphPrecip: 2%
3:00am
Dew Pt 52°F
NW 2 mphPrecip: 1%
4:00am
Dew Pt 51°F
W 2 mphPrecip: 2%
5:00am
Dew Pt 51°F
W 2 mphPrecip: 1%
6:00am
Dew Pt 51°F
W 3 mphPrecip: 0%
7:00am
Dew Pt 50°F
Wind Chill: 49°F
W 3 mphPrecip: 0%
8:00am
Dew Pt 51°F
W 5 mphPrecip: 0%
9:00am
Dew Pt 54°F
W 6 mphPrecip: 0%
10:00am
Dew Pt 55°F
W 8 mphPrecip: 0%
11:00am
Dew Pt 55°F
W 10 mphPrecip: 0%
12:00pm
Dew Pt 52°F
W 12 mphPrecip: 0%
1:00pm
Dew Pt 48°F
W 13 mphPrecip: 0%
2:00pm
Dew Pt 44°F
W 13 mphPrecip: 0%
3:00pm
Dew Pt 42°F
W 13 mphPrecip: 0%
4:00pm
Dew Pt 41°F
W 13 mphPrecip: 0%
5:00pm
Dew Pt 40°F
W 12 mphPrecip: 0%
6:00pm
Dew Pt 39°F
W 10 mphPrecip: 0%
7:00pm
Dew Pt 38°F
W 10 mphPrecip: 0%
8:00pm
Dew Pt 36°F
W 9 mphPrecip: 0%
9:00pm
Dew Pt 36°F
Wind Chill: 46°F
W 9 mphPrecip: 0%
10:00pm
Dew Pt 36°F
Wind Chill: 44°F
W 8 mphPrecip: 0%
11:00pm
Dew Pt 36°F
Wind Chill: 43°F
W 8 mphPrecip: 0%
12:00am
Dew Pt 35°F
Wind Chill: 42°F
W 8 mphPrecip: 0%
1:00am
Dew Pt 35°F
Wind Chill: 41°F
W 8 mphPrecip: 0%
2:00am
Dew Pt 34°F
Wind Chill: 38°F
W 8 mphPrecip: 0%
3:00am
Dew Pt 34°F
Wind Chill: 38°F
W 8 mphPrecip: 0%
4:00am
Dew Pt 33°F
Wind Chill: 36°F
W 9 mphPrecip: 0%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 041853
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
253 PM EDT Sun Oct 4 2026
.WHAT HAS CHANGED...
No significant changes to the forecast.
&&
.KEY MESSAGES...
- Scattered showers this afternoon into early morning Monday.
- A sharp temperature drop is then expected for the start of the
week followed by a return to dry, fall-like conditions.
&&
.DISCUSSION...
KEY MESSAGE 1...Scattered showers this afternoon into early
morning Monday.
High pressure south of the Maritimes no longer had enough
influence to prevent clouds and scattered showers from
overspreading southern New England this afternoon. The trend of
the latest guidance suite was slightly farther south, quite
close to the 40N/70W benchmark just after midnight. Based on
this, kept the highest rainfall chances towards the Cape and
islands, while simultaneously lowering those chances farther
inland. Thinking there should be a rather sharp gradient on the
northwest edge of this storm, but there is lower confidence on
where exactly that will be. Overall, rainfall totals should
remain less than one half inch across the Cape and islands, and
generally less than one quarter inch north and west of the Cape
Cod Canal.
Thinking that most of the showers will be well offshore shortly
after midnight, and even past the southern New England coastal
waters around daybreak Monday.
KEY MESSAGE 2...A sharp temperature drop is then expected for
the start of the week followed by a return to dry, fall-like
conditions.
A deep low continues tracking eastward across Quebec to start
the week, with latest guidance indicating the 540dam thickness
line reaching northern New England, generally across Maine at
its southernmost pass. The 560dam thickness line may extend
through central MA. High pressure follows this low, which will
aid in drying out the region and remains the main story for this
week.
With the passage of this low, colder, drier Canadian air will
plunge south, with 850 mb temperatures reaching 0C and lower
across the higher elevations late Monday night/early Tuesday
morning. 925 mb temperatures may also approach 0C in these same
areas and generally remain below 10C through Tuesday night as
well. This environment will be supportive of lows Monday night
in the low 40s and upper 30s. Tuesday night looks to be cooler
given some radiational effects possible with diminishing winds
overnight and clear skies as another high pressure passes just
to the south of southern New England.
The flow aloft shifts more WSW to SW as the low exits and high
pressure centered to our south midweek tracks east. With the
return of SW flow and drier conditions, more seasonable
temperatures take hold for the back half of the week. Ensembles
also hint at the chance of high temperatures getting back to the
low 70s towards Thursday afternoon, generally across the CT
Valley, Merrimack Valley, and the coastal plain. Probabilities
currently range between 20 and 60 percent, with the highest
probabilities in the GEFS and lowest in the ECMWF ensemble.
Overall, though, highs are expected to be more so in the 60s for
the second half of the week into the weekend.
&&
.AVIATION /18Z SUNDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Today and Tonight...High confidence in trends, moderate
confidence in timing of showers.
VFR lower to MVFR from SW to NE between 20z-00z across the Cape
and islands. Showers become more widespread this evening and
overnight, reducing visibilities to 3-5SM at times. Ceilings
lower to MVFR/IFR overnight into early Monday morning. Expecting
primarily VFR west of a line from BOS-PVD-WST.
Monday and Monday Night...High confidence.
Lingering IFR across the cape and islands Monday morning.
Otherwise, VFR. Gusty west winds developing by early afternoon.
KBOS Terminal...High confidence in trends, moderate confidence
in the timing of showers and lower ceilings. Terminal expected
to be right along the northern edge of the precipitation shield.
May not be much time with MVFR or lower, but it is a
possibility.
KBDL Terminal...High confidence in TAF.
Outlook /Tuesday through Friday/...
Tuesday: VFR. Breezy.
Tuesday Night: VFR.
Wednesday through Thursday: VFR. Breezy.
Thursday Night through Friday: VFR.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Monday Night...High confidence.
A low pressure passes southeast of the waters tonight, with
another cold front to pass by during Monday. Widespread showers
tonight, especially across the southern waters. Gusty west winds
then develop with the frontal passage Monday afternoon. Posted
Small Craft Advisories for marginal wind gusts up to 25 kt. In
addition, seas should build to 5-7 feet across the outer coastal
waters.
Outlook /Tuesday through Friday/...
Tuesday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Seas up to 5 ft.
Tuesday Night: Winds less than 25 kt. Seas locally approaching
5 ft.
Wednesday: Winds less than 25 kt.
Wednesday Night: Winds less than 25 kt. Seas locally
approaching 5 ft.
Thursday through Friday: Winds less than 25 kt.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 9 PM Monday to 1 AM EDT Tuesday for
ANZ232.
Small Craft Advisory from 10 AM Monday to 1 PM EDT Tuesday for
ANZ250.
Small Craft Advisory from 8 AM Monday to 1 PM EDT Tuesday for
ANZ254.
Small Craft Advisory from 3 PM Monday to 1 PM EDT Tuesday for
ANZ255-256.
&&
$$
DISCUSSION...Belk/Hrencecin
AVIATION...Belk/Hrencecin
MARINE...Belk/Hrencecin
Radar [‒] Radar [+]
Radar images courtesy Weather Underground / Intellicast.
Satellite [‒] Satellite [+]
Satellite images courtesy Weather Underground / Intellicast.
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UV Forecast [‒] UV Forecast [+]
UV Index forecast from the Environmental Protection Agency
UV Index forecast high for today: 4 Medium
Current (Estimated): 0 None
Precipitation [‒] Precipitation [+]
Note: Rain measured automatically by weather station. Rain totals do not necessarily include melted frozen precipitation.
For more accurate, manually measured rain data, see the Local Precip Data page.
0.00 in
Rain Rate (/hr):
0.00 in
Rain Last 60 min:
0.00 in
Rain Today:
0.00 in
Saturday:
0.06 in
October:
24.40 in
2026
Daily Extremes [‒] Daily Extremes [+]
12:40pm
63.5°F
High today:
6:48am
47.5°F
Low today:
1:35pm
70.2°F
High Saturday:
11:48pm
51.6°F
Low Saturday:
6:48am
47.5°F
Low wind chill today:
10:38am
55.2°F
High dew pt today:
12:38am
58.3°F
High dew pt Saturday:
11:50am
7 mph
Wind gust today:
8:55am
5 mph
Wind gust Saturday:
Alerts / Advisories [‒] Alerts / Advisories [+]
No alerts/warnings active for Southeast Middlesex County.
Sun / Moon [‒] Sun / Moon [+]
First Light:
6:18am
Sunrise:
6:46am
Sunset:
6:22pm
Twilight ends:
6:50pm
Daylight length:
11 hours 36 minutes
Phase:
Waning Crescent (35%)
Moon rise:
No moon rise today
Moon set:
3:25pm
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