Lexington, Massachusetts, USA
35.1°F
1.7°C
Cold
Clear
Tonight: Lo 61 °F
Friday: Hi 77 °F
Dew Point:
32.4°F
Humidity: 90%
UV Index: 0.0 None
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.01 in
Rain Wednesday: 0.00 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Thu Sep 10, 2026 12:33pm EDT
- Plenty of sunshine with comfortable humidity Fri-Sat. Highs mainly in the 70s. Lows Fri night in the 40s and 50s.
- Chances for showers return late Saturday night into Sunday. Dry and seasonable weather returns Monday.
- A quick bought of summer like heat is possible towards the middle of next weak ahead of a cold front.
Partly Cloudy
Lo 61 °F
Partly cloudy, with a low around 61. Northwest wind 5 to 8 mph.
Sunny
Hi 77 °F
Sunny, with a high near 77. Northwest wind 5 to 9 mph.
Clear
Lo 50 °F
Clear, with a low around 50. Northwest wind 2 to 7 mph.
Sunny
Hi 77 °F
Sunny, with a high near 77. Southeast wind 2 to 7 mph.
Partly Cloudy then Scattered Rain Showers
Lo 63 °F
Scattered rain showers after 2am. Partly cloudy, with a low around 63. South wind around 7 mph. Chance of precipitation is 30%.
Chance Rain Showers
Hi 77 °F
A chance of rain showers before 5pm. Mostly cloudy, with a high near 77. Southwest wind 5 to 8 mph. Chance of precipitation is 60%.
Mostly Cloudy
Lo 63 °F
Mostly cloudy, with a low around 63. West wind around 6 mph.
Mostly Sunny
Hi 77 °F
Mostly sunny, with a high near 77. Northwest wind around 8 mph.
Partly Cloudy
Lo 58 °F
Partly cloudy, with a low around 58. North wind around 6 mph.
Mostly Sunny
Hi 78 °F
Mostly sunny, with a high near 78. Southeast wind 3 to 10 mph.
Partly Cloudy
Lo 66 °F
Partly cloudy, with a low around 66. Southwest wind around 10 mph.
Partly Sunny then Chance Rain Showers
Hi 82 °F
A chance of rain showers after 1pm. Partly sunny, with a high near 82. West wind around 8 mph. Chance of precipitation is 30%.
Chance Rain Showers
Lo 59 °F
A chance of rain showers. Partly cloudy, with a low around 59. Northwest wind around 6 mph. Chance of precipitation is 30%.
Chance Rain Showers
Hi 72 °F
A chance of rain showers. Mostly sunny, with a high near 72. East wind around 7 mph.
Issued by:
National Weather Service Boston / Norton, MA
Updated Thu Sep 10, 2026 9:59pm EDT

W 9 mph
W 8 mph
W 7 mph
W 6 mph
W 5 mph
W 5 mph
W 6 mph
NW 6 mph
NW 7 mph
NW 7 mph
NW 8 mph
NW 9 mph
NW 10 mph
NW 12 mph
NW 12 mph
NW 12 mph
W 10 mph
NW 10 mph
NW 10 mph
NW 9 mph
NW 8 mph
NW 7 mph
NW 5 mph
NW 5 mph
NW 3 mph
NW 2 mph
NW 2 mph
N 2 mph
N 1 mph
NW 1 mph
W 2 mph
W 2 mph
NW 1 mph
NE 1 mph
E 1 mph
E 3 mph
000
FXUS61 KBOX 102336
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
736 PM EDT Thu Sep 10 2026
.WHAT HAS CHANGED...
No significant changes to the forecast.
&&
.KEY MESSAGES...
- Plenty of sunshine with comfortable humidity Fri-Sat. Highs
mainly in the 70s. Lows Fri night in the 40s and 50s.
- Chances for showers return late Saturday night into Sunday.
Dry and seasonable weather returns Monday.
- A quick bought of summer like heat is possible towards the
middle of next weak ahead of a cold front.
&&
.DISCUSSION...
KEY MESSAGE 1...Plenty of sunshine with comfortable humidity
Fri-Sat. Highs mainly in the 70s. Lows Fri night in the 40s and
50s.
Large high pressure arrives from the west Friday, then moves
overhead for Saturday. This will mean mainly dry weather with
relatively light winds. Expecting rather good radiational
cooling conditions Friday night. Some of the colder locations
could fall into the mid 40s, while the more urban centers should
be 55-60.
KEY MESSAGE 2...Chances for showers return late Saturday night
into Sunday. Dry and seasonable weather returns Monday.
As the high pressure system moves offshore Saturday, a shortwave
pushes through southern New England likely bringing a wave of
showers with it Saturday night into Sunday. Dewpoints surging to
near 70 degrees and PWATs climbing to near 2" by Sunday morning
indicate the possibility that some showers could have some
heavier banding set up, especially south of the Mass Pike.
Initial model guidance is hinting at rainfall totals upwards of
0.75", but we're not quite within range of the CAMs yet.
Certainly something to keep an eye on.
Another ridge of high pressure should begin to move in sometime
later Sunday evening or Monday bringing mainly dry and
seasonable weather for the start of the next work week.
KEY MESSAGE 3...A quick bought of summer like heat is possible
towards the middle of next weak ahead of a cold front.
Global guidance is suggesting an anomalously strong upper level
ridge builds by the middle of next week over the southeastern
states and Appalachian region. This would indicate southern New
England returns to predominantly west-southwest flow, pushing
warmer air from the south into New England. Depending on how
much mixing we can generate at the surface ahead of the next
cold front, there is potential for high temperatures to reach
back into the 80s for a day or two by the middle of next week.
&&
.AVIATION /00Z FRIDAY THROUGH TUESDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Tonight...High confidence.
VFR. Diminishing NW winds which should decouple in the normal low-
lying locations.
Friday and Friday Night...High confidence.
VFR. NW winds 6-12 knots, becoming light NW to N Friday night.
KBOS Terminal...High confidence in TAF.
KBDL Terminal...High confidence in TAF.
Outlook /Saturday through Tuesday/...
Saturday: VFR.
Saturday Night: Mainly VFR, with local MVFR possible. Chance
SHRA.
Sunday: Mainly VFR, with local IFR possible. Breezy. Chance
SHRA, slight chance TSRA.
Sunday Night through Tuesday: VFR.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Friday Night...High confidence.
Winds and seas are expected to gradually subside this evening,
with rough seas lingering longer across the southern coastal and
outer waters. Anticipating that Small Craft Advisories will be
able to be dropped in stages this evening and overnight. High
pressure moving over the waters should result in relatively
light winds and seas Friday through Friday Night.
Outlook /Saturday through Tuesday/...
Saturday through Saturday Night: Winds less than 25 kt.
Sunday through Sunday Night: Winds less than 25 kt. Areas of
seas approaching 5 ft. Chance of rain showers, slight chance of
thunderstorms.
Monday through Tuesday: 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-
235-237.
Small Craft Advisory until 1 AM EDT Friday for ANZ254.
Small Craft Advisory until 4 AM EDT Friday for ANZ255-256.
&&
$$
DISCUSSION...Belk/McMinn
AVIATION...McMinn
MARINE...Belk/McMinn
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 6 High
Current (Measured): 0.0 None
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:
0.01 in
Rain Today:
0.00 in
Wednesday:
0.01 in
September:
1.26 in
2026
1:17pm
36.1°F
High today:
12:00am
25.2°F
Low today:
2:28pm
30.4°F
High Wednesday:
7:11am
16.2°F
Low Wednesday:
12:00am
25.2°F
Low wind chill today:
7:11am
16.2°F
Low wind chill Wednesday:
1:17pm
33.3°F
High dew pt today:
11:56pm
20.7°F
High dew pt Wednesday:
None
Wind gust today:
None
Wind gust Wednesday:
No alerts/warnings active for Southeast Middlesex County.
First Light:
6:11am
Sunrise:
6:39am
Sunset:
5:19pm
Twilight ends:
5:47pm
Daylight length:
10 hours 39 minutes
Phase:
New Moon (82%)
Moon set:
8:18am
Moon rise:
9:38pm