Lexington Weather
Lexington, Massachusetts, USA
- Partly cloudy
-
80.1°F / 26.7°C
-
65.8°F
- 82°F
-
62%
-
NE Calm, 10-min avg: 1 mph, gust: 2 mph
- 10 miles
- 0.00 in
Current Conditions [‒] Current Conditions [+]
80.1°F
26.7°C
Feels like 82°F
Hot
Partly cloudy
Today: Hi 83 °F
Tonight: Lo 61 °F
Dew Point:
65.8°F
Humidity:
62%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Thursday: 0.24 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: 1 mph
Gusts: 2 mph
Forecast [‒] Forecast [+]
NWS Weather Forecast -
Today,
Tonight,
&
Saturday
through
Thursday Night
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Fri Sep 4, 2026 8:10am EDT
Overview:
- Mainly dry and pleasant today and Saturday with a chance for some isolated showers Saturday afternoon.
- Cooler weather this weekend into early next week gives way to a warming trend and the chance for unsettled weather by mid week.
- Dangerous conditions at the beach for the holiday weekend with as the rip current risk increases Sunday and Labor Day.
Today:
Patchy Fog then Mostly Sunny
Hi 83 °F
Patchy fog before 9am. Mostly sunny, with a high near 83. Northwest wind around 7 mph.
Tonight:
Mostly Clear
Lo 61 °F
Mostly clear, with a low around 61. Northwest wind around 6 mph.
Saturday:
Partly Sunny then Slight Chance Showers And T-Storms
Hi 75 °F
A slight chance of showers and thunderstorms between 2pm and 4pm, then a chance of showers and thunderstorms. Partly sunny. High near 75, with temperatures falling to around 69 in the afternoon. North wind around 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Saturday Night:
Chance Rain Showers
Lo 56 °F
A chance of rain showers. Mostly cloudy, with a low around 56. Northeast wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Sunday:
Slight Chance Rain Showers then Mostly Sunny
Hi 71 °F
A slight chance of rain showers before 8am. Mostly sunny, with a high near 71. North wind 5 to 8 mph. Chance of precipitation is 20%.
Sunday Night:
Mostly Clear
Lo 54 °F
Mostly clear, with a low around 54. North wind around 5 mph.
Labor Day:
Sunny
Hi 76 °F
Sunny, with a high near 76. Northwest wind around 6 mph.
Monday Night:
Partly Cloudy
Lo 58 °F
Partly cloudy, with a low around 58. West wind around 5 mph.
Tuesday:
Mostly Sunny
Hi 77 °F
Mostly sunny, with a high near 77. Northwest wind around 7 mph.
Tuesday Night:
Partly Cloudy
Lo 55 °F
Partly cloudy, with a low around 55. Northwest wind 2 to 6 mph.
Wednesday:
Partly Sunny then Slight Chance Rain Showers
Hi 73 °F
A slight chance of rain showers after 5pm. Partly sunny, with a high near 73. West wind 2 to 6 mph.
Wednesday Night:
Chance Rain Showers
Lo 61 °F
A chance of rain showers. Mostly cloudy, with a low around 61. South wind 6 to 9 mph. Chance of precipitation is 50%.
Thursday:
Chance Rain Showers then Slight Chance Showers And T-Storms
Hi 80 °F
A chance of rain showers before 8am, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 80. Southwest wind around 12 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Thursday Night:
Chance Showers And T-Storms
Lo 61 °F
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 61. West wind around 10 mph, with gusts as high as 24 mph.
NWS Hourly Forecast -
Today 1pm through Sun 12am
Issued by:
National Weather Service Boston / Norton, MA
Updated Fri Sep 4, 2026 8:10am EDT
1:00pm
Dew Pt 64°F
Heat Index: 82°F
NW 7 mphPrecip: 1%
2:00pm
Dew Pt 64°F
Heat Index: 83°F
NW 7 mphPrecip: 1%
3:00pm
Dew Pt 63°F
Heat Index: 82°F
NW 7 mphPrecip: 1%
4:00pm
Dew Pt 63°F
Heat Index: 82°F
NW 6 mphPrecip: 1%
5:00pm
Dew Pt 63°F
Heat Index: 83°F
NW 6 mphPrecip: 1%
6:00pm
Dew Pt 63°F
Heat Index: 81°F
NW 5 mphPrecip: 1%
7:00pm
Dew Pt 62°F
NW 5 mphPrecip: 1%
8:00pm
Dew Pt 61°F
NW 5 mphPrecip: 1%
9:00pm
Dew Pt 60°F
NW 5 mphPrecip: 1%
10:00pm
Dew Pt 60°F
NW 5 mphPrecip: 0%
11:00pm
Dew Pt 60°F
NW 5 mphPrecip: 0%
12:00am
Dew Pt 59°F
NW 6 mphPrecip: 0%
1:00am
Dew Pt 59°F
NW 6 mphPrecip: 0%
2:00am
Dew Pt 59°F
NW 6 mphPrecip: 0%
3:00am
Dew Pt 58°F
NW 6 mphPrecip: 1%
4:00am
Dew Pt 58°F
NW 6 mphPrecip: 1%
5:00am
Dew Pt 58°F
NW 6 mphPrecip: 1%
6:00am
Dew Pt 58°F
NW 6 mphPrecip: 0%
7:00am
Dew Pt 59°F
N 6 mphPrecip: 1%
8:00am
Dew Pt 60°F
N 6 mphPrecip: 1%
9:00am
Dew Pt 61°F
N 6 mphPrecip: 1%
10:00am
Dew Pt 61°F
N 7 mphPrecip: 1%
11:00am
Dew Pt 61°F
NE 7 mphPrecip: 3%
12:00pm
Dew Pt 61°F
NE 7 mphPrecip: 4%
1:00pm
Dew Pt 61°F
NE 7 mphPrecip: 4%
2:00pm
Dew Pt 62°F
NE 7 mphPrecip: 16%
Rain: 0.01 in
3:00pm
Dew Pt 62°F
NE 7 mphPrecip: 22%
Rain: 0.02 in
4:00pm
Dew Pt 61°F
NE 7 mphPrecip: 27%
Rain: 0.03 in
5:00pm
Dew Pt 61°F
NE 7 mphPrecip: 30%
Rain: 0.04 in
6:00pm
Dew Pt 60°F
NE 6 mphPrecip: 28%
Rain: 0.04 in
7:00pm
Dew Pt 60°F
NE 5 mphPrecip: 24%
Rain: 0.02 in
8:00pm
Dew Pt 59°F
NE 5 mphPrecip: 14%
9:00pm
Dew Pt 59°F
NE 5 mphPrecip: 20%
10:00pm
Dew Pt 59°F
N 5 mphPrecip: 25%
11:00pm
Dew Pt 59°F
N 3 mphPrecip: 31%
12:00am
Dew Pt 59°F
N 3 mphPrecip: 30%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 041108
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
708 AM EDT Fri Sep 4 2026
.WHAT HAS CHANGED...
No significant changes to the forecast.
&&
.KEY MESSAGES...
- Mainly dry and pleasant today and Saturday with a chance for
some isolated showers Saturday afternoon.
- Cooler weather this weekend into early next week gives way to
a warming trend and the chance for unsettled weather by mid
week.
- Dangerous conditions at the beach for the holiday weekend
with as the rip current risk increases Sunday and Labor Day.
&&
.DISCUSSION...
KEY MESSAGE 1. Mainly dry and pleasant today and Saturday with a
chance for some isolated showers Saturday afternoon.
Looking drier and mild over the next couple of days as broad NW flow
around a closed low advects a lower PWAT airmass into the region.
PWAT values fall below 1.00" by this afternoon into Saturday.
Despite the overall drier airmass, a broad cutoff low over the
Canadian Maritimes will maintain a non-zero chance of isolated
showers today and Saturday. The greatest chance for shower activity
falls on Saturday as an embedded shortwave moves S from Canada. Each
day will see diurnal cumulus as low level lapse rates steepen during
the afternoon. In terms of temperatures, today will be the warmest
day of the whole forecast as a slightly warmer airmass pushes in;
850 mb temps briefly reach ~15C this afternoon before dropping to
~8C Saturday resulting in high temperatures in the low to mid 80s
and low to mid 70s respectively.
KEY MESSAGE 2... Cooler weather this weekend into early next week
gives way to a warming trend and the chance for unsettled weather by
mid week.
The upper air pattern later this weekend into next week evolves from
an amplified omega block into a more zonal configuration. The
changes will come as the persistent closed mid-level low over Nova
Scotia finally pushes away from the eastern CONUS. In its place, 500
mb heights rise as a broad southeast ridge amplifies poleward. What
this translates to at the surface is a benign weather pattern with
somewhat persistent high pressure over the northeast. The next
chance for disturbed weather arrives midweek as a strong shortwave
passes to the N of the region. Guidance shows a somewhat compact and
seasonably strong surface low forming in response to the
aforementioned upper low. Details are still somewhat TBD given the
time to the event but there is a chance for unsettled weather with
this feature around midweek.
Temperatures aloft are cooler Sunday, associated with that mid-level
low east of New England. 925mb temperatures are only around +8C to
+10C, which with boundary layer mixing supports highs in the upper
60s to low 70s. Thus, Sunday will feel very much like autumn, with a
blend of sun and clouds, northerly winds and dew points in the low
50s. While winds won't be overly strong, the combination of cooler
temperatures and lower dew points will make for a rather crisp day.
Sunday night could feature some decent radiational cooling as high
pressure settles across the region, though this will depend on how
quickly winds diminish. It appears as though the latest NBM has
picked up on this trend for both Saturday night and Sunday night.
The latest run shows widespread 50-55 degree readings with even a
few upper 40s in the higher terrain of northern Massachusetts.
Should see a rebound in temperature readings by early next week as
925mb temperatures climb +14C to +18C, supporting near-seasonable
highs in the upper 70s for Labor Day, then upper 70s to lower 80s
Tuesday into the middle part of next week. Humidity remains
tolerable as well, with dew points generally in the upper 50s to
around 60F. Labor Day itself looks quiet and dry, though there will
be a high risk for rip currents along the ocean beaches.
KEY MESSAGE 3...Dangerous conditions at the beach for the holiday
weekend with as the rip current risk increases Sunday and Labor Day.
Persistent northeast flow, long-period swell, and offshore seas of 4-
7 feet will continue to support an elevated risk for dangerous rip
currents through the Holiday Weekend, especially Sunday into Labor
Day for east-facing ocean beaches. With otherwise quiet weather
expected, those heading to the beach should be mindful that ocean
conditions may still be hazardous. Be sure to check with local beach
staff or lifeguards regarding ocean conditions before entering the
water.
&&
.AVIATION /12Z FRIDAY THROUGH TUESDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
12z Update...
Today...Moderate confidence in trends, lower confidence in
timing.
Between 12-15z, conditions improve to VFR for most, with the
exception of the outer Cape and KACK. There, it may take well into
the early afternoon for conditions to improve to VFR. Light north-
northwest winds for most, though a sea breeze develops across
eastern coastal Massachusetts, including KBOS.
Friday Night...High confidence.
VFR. Light northwest winds.
Saturday...High confidence.
VFR. N/NE winds 10-15 kts. Isolated SHRA/TSRA.
KBOS Terminal...Low confidence.
Areas of stratus and fog continue IFR with MVFR visibilities
roughly through 12z. Some improvement to MVFR is possible
during the morning push, otherwise trending to VFR after 14/15z.
An onshore wind is also anticipated for much of the day today.
KBDL Terminal...Moderate confidence.
Areas of MVFR/IFR conditions contingent upon the development of
low stratus/fog. Any reduced flight categories resolve shortly
after 12z.
Outlook /Saturday Night through Tuesday/...
Saturday Night: Mainly VFR, with local MVFR possible. Breezy.
Chance SHRA.
Sunday: VFR. Breezy.
Sunday Night through Tuesday: VFR.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Today through Saturday Night...
W/NW winds this morning gradually shift the S/SW this evening A
few showers and t-storms may move over the southern waters this
evening then tranquil weather persists. Seas 2-3 ft. Winds shift
to the NE and increase to 10-15 kt Saturday. Seas generally
remain below Small Craft Advisory criteria during the daytime
with an increasing chance later Saturday night.
Outlook /Saturday Night through Tuesday/...
Saturday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft.
Sunday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Areas of rough seas.
Sunday Night: Winds less than 25 kt. Areas of rough seas.
Labor Day: Winds less than 25 kt. Areas of seas approaching
5 ft.
Monday Night: Winds less than 25 kt. Seas locally approaching
5 ft.
Tuesday: Winds less than 25 kt.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.
&&
$$
DISCUSSION...Dooley/FT
AVIATION...BW/Dooley/FT
MARINE...Dooley/FT
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: 7 High
Current (Estimated): 7 High
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:
0.24 in
Thursday:
0.67 in
September:
20.57 in
2026
Daily Extremes [‒] Daily Extremes [+]
12:36pm
81.1°F
High today:
7:16am
65.7°F
Low today:
5:43pm
74.7°F
High Thursday:
5:52am
63.1°F
Low Thursday:
10:42am
69.1°F
High dew pt today:
6:33pm
70.3°F
High dew pt Thursday:
12:36pm
83.9°F
High heat index today:
12:22pm
6 mph
Wind gust today:
1:30am
9 mph
Wind gust Thursday:
Alerts / Advisories [‒] Alerts / Advisories [+]
No alerts/warnings active for Southeast Middlesex County.
Sun / Moon [‒] Sun / Moon [+]
First Light:
5:45am
Sunrise:
6:14am
Sunset:
7:14pm
Twilight ends:
7:43pm
Daylight length:
13 hours 1 minute
Phase:
Last Quarter (46%)
Moon set:
2:51pm
Moon rise:
11:21pm
Social Media - Mastodon [‒] Social Media - Mastodon [+]
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