Lexington Weather
Lexington, Massachusetts, USA
- Mostly cloudy
-
78.3°F / 25.7°C
-
67.6°F
-
70%
- Calm, 10-min avg: Calm, gust: None
- 10 miles
- 0.00 in
Current Conditions [‒] Current Conditions [+]
78.3°F
25.7°C
Muggy
Mostly cloudy
Today: Hi 80 °F
Tonight: Lo 60 °F
Dew Point:
67.6°F
Humidity:
70%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Friday: 0.12 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
Forecast [‒] Forecast [+]
NWS Weather Forecast -
Today,
Tonight,
&
Sunday
through
Friday Night
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sat Jun 27, 2026 7:48am EDT
Overview:
- Spot showers towards the south coast today.
- Scattered showers possible Sunday, then the start of a warming trend.
- Warm and humid midweek, along with a risk of showers towards the second half of next week.
Today:
Mostly Sunny then Isolated Rain Showers
Hi 80 °F
Isolated rain showers between 1pm and 5pm. Mostly sunny, with a high near 80. East wind 1 to 7 mph. Chance of precipitation is 20%.
Tonight:
Isolated Rain Showers then Mostly Cloudy
Lo 60 °F
Isolated rain showers before 9pm. Mostly cloudy, with a low around 60. East wind 1 to 6 mph. Chance of precipitation is 20%.
Sunday:
Partly Sunny then Slight Chance Rain Showers
Hi 80 °F
A slight chance of rain showers after 4pm. Partly sunny, with a high near 80. East wind 2 to 8 mph. Chance of precipitation is 20%.
Sunday Night:
Slight Chance Rain Showers then Mostly Clear
Lo 61 °F
A slight chance of rain showers before 10pm. Mostly clear, with a low around 61. South wind 2 to 7 mph. Chance of precipitation is 20%.
Monday:
Sunny
Hi 85 °F
Sunny, with a high near 85. Northeast wind 2 to 7 mph.
Monday Night:
Mostly Clear
Lo 65 °F
Mostly clear, with a low around 65. South wind around 7 mph.
Tuesday:
Partly Sunny then Chance Showers And T-Storms
Hi 90 °F
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 90. Southwest wind 5 to 9 mph. Chance of precipitation is 40%.
Tuesday Night:
Chance Showers And T-Storms
Lo 69 °F
A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms between 8pm and 1am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Southwest wind around 8 mph. Chance of precipitation is 40%.
Wednesday:
Slight Chance Rain Showers then Mostly Sunny
Hi 95 °F
A slight chance of rain showers before 8am. Mostly sunny, with a high near 95. Southwest wind around 9 mph.
Wednesday Night:
Partly Cloudy
Lo 75 °F
Partly cloudy, with a low around 75. Southwest wind around 8 mph.
Thursday:
Mostly Sunny then Slight Chance Showers And T-Storms
Hi 100 °F
A slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 100. West wind 6 to 9 mph.
Thursday Night:
Slight Chance Showers And T-Storms then Partly Cloudy
Lo 75 °F
A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 75. Northwest wind around 7 mph.
Friday:
Mostly Sunny then Slight Chance Showers And T-Storms
Hi 96 °F
A slight chance of showers and thunderstorms between 2pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 96. North wind 5 to 8 mph. Chance of precipitation is 30%.
Friday Night:
Chance Showers And T-Storms
Lo 69 °F
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 69. Northeast wind around 6 mph.
NWS Hourly Forecast -
Today 1pm through Mon 12am
Issued by:
National Weather Service Boston / Norton, MA
Updated Sat Jun 27, 2026 7:48am EDT
1:00pm
Dew Pt 62°F
E 6 mphPrecip: 15%
2:00pm
Dew Pt 62°F
SE 6 mphPrecip: 20%
3:00pm
Dew Pt 62°F
SE 6 mphPrecip: 18%
4:00pm
Dew Pt 62°F
SE 7 mphPrecip: 16%
5:00pm
Dew Pt 62°F
SE 7 mphPrecip: 14%
6:00pm
Dew Pt 62°F
SE 6 mphPrecip: 16%
7:00pm
Dew Pt 61°F
SE 6 mphPrecip: 17%
8:00pm
Dew Pt 62°F
E 5 mphPrecip: 19%
9:00pm
Dew Pt 62°F
E 3 mphPrecip: 14%
10:00pm
Dew Pt 62°F
SE 2 mphPrecip: 10%
11:00pm
Dew Pt 62°F
SE 1 mphPrecip: 6%
12:00am
Dew Pt 62°F
E 1 mphPrecip: 5%
1:00am
Dew Pt 62°F
E 1 mphPrecip: 5%
2:00am
Dew Pt 61°F
E 1 mphPrecip: 5%
3:00am
Dew Pt 61°F
E 1 mphPrecip: 5%
4:00am
Dew Pt 61°F
E 2 mphPrecip: 5%
5:00am
Dew Pt 61°F
E 2 mphPrecip: 5%
6:00am
Dew Pt 60°F
E 2 mphPrecip: 3%
7:00am
Dew Pt 61°F
E 2 mphPrecip: 3%
8:00am
Dew Pt 61°F
NE 2 mphPrecip: 7%
9:00am
Dew Pt 61°F
E 3 mphPrecip: 4%
10:00am
Dew Pt 61°F
E 3 mphPrecip: 6%
11:00am
Dew Pt 61°F
E 5 mphPrecip: 13%
12:00pm
Dew Pt 61°F
E 5 mphPrecip: 13%
1:00pm
Dew Pt 61°F
NE 6 mphPrecip: 13%
2:00pm
Dew Pt 61°F
NE 6 mphPrecip: 11%
3:00pm
Dew Pt 60°F
NE 7 mphPrecip: 14%
4:00pm
Dew Pt 60°F
E 7 mphPrecip: 16%
5:00pm
Dew Pt 60°F
E 8 mphPrecip: 15%
6:00pm
Dew Pt 60°F
E 7 mphPrecip: 19%
7:00pm
Dew Pt 60°F
E 6 mphPrecip: 14%
8:00pm
Dew Pt 64°F
SE 3 mphPrecip: 15%
9:00pm
Dew Pt 63°F
SE 3 mphPrecip: 18%
10:00pm
Dew Pt 63°F
S 3 mphPrecip: 14%
11:00pm
Dew Pt 63°F
S 2 mphPrecip: 11%
12:00am
Dew Pt 63°F
S 2 mphPrecip: 7%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 271152
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
752 AM EDT Sat Jun 27 2026
.WHAT HAS CHANGED...
No major changes to the forecast. Trends remain relatively
consistent.
&&
.KEY MESSAGES...
- Spot showers towards the south coast today.
- Scattered showers possible Sunday, then the start of a
warming trend.
- Warm and humid midweek, along with a risk of showers towards
the second half of next week.&&
.DISCUSSION...
KEY MESSAGE 1...Spot showers towards the south coast today.
Generally dry across the region today aside from some spot showers
towards the south coast. Guidance has continued to keep these
showers there, reaching somewhat into RI and SE MA. Any showers that
pop up are not expected to be very impactful, let along severe.
Highs today in the midst of light winds with some sunshine will
reach the low 80s and upper 70s. Given localized seabreezes, spots
along the immediate coastlines may be cooler than surrounding areas.
KEY MESSAGE 2...Scattered showers possible Sunday, then the start of
a warming trend.
Ahead of the ridge building in from the west, we find ourselves
under some troughing Sunday with surface high pressure extending
into New England and a somewhat stationary front just to the south
of southern New England. With this messier setup, the chance for
some afternoon showers returns; the latest CAMs all seem to have a
signal for these showers popping up across southern New England.
Some of the latest global guidance plus the NAM does also hint at
the chance of these showers extending into the nighttime hours. No
specific area within our region seems to be more likely than the
others at this time. As for the risk of any of these becoming
thunderstorms, the chance is quite low at this time given the lack
of forcing and MLCAPE generally only maxing out around 500 J/kg.
Drier weather is expected to return (at least briefly) as high
pressure associated with an amplified upper level ridge moves into
southern New England. This ridge will be a key feature to monitor
for next week, as it is the anticipated heat dome that will impact
much of the eastern US. A warming trend also kicks off, continuing
and intensifying into midweek.
KEY MESSAGE 3...Warm and humid midweek, along with a risk of showers
towards the second half of next week.
The increased warmth looks to peak sometime mid- to late-week as we
sit just on the edge of the anticipated heat dome building over much
of the eastern US. Ensembles have indicated mean high temperatures
Wednesday and Thursday climbing into the 90s with even a shot at
100F, supported by 850 mb temperatures at 20-22C and 925 mb
temperatures in the deterministic guidance approaching 30C.
Probabilities for temperatures at 100F or higher are around 20-40
percent across a number of the ensembles, with the GEFS more bullish
with probabilities to 60 percent Thursday afternoon. For Wednesday
afternoon, probabilities are mostly between 20-40 percent. The
highest probabilities both days lie mostly in eastern MA but do
reach into CT both days. It's worth noting, too, that this is before
factoring in any humidity, which will also be increasing in this
pattern. A shortwave or two may "roll" along the eastern edge of the
upper level ridge, which may bring some unsettled weather for
midweek. Location-specific and refined timing details are not yet
known, though latest guidance is pointing towards sometime between
Tuesday evening and Thursday.
&&
.AVIATION /12Z SATURDAY THROUGH WEDNESDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
12z TAF Update...
Today...High confidence except low confidence on portions of the
eastern MA coast.
Most locations will remain VFR today with light winds.
However...along parts of the immediate coast things were more
uncertain. One area of low clouds/fog was attempting to back
onto the north shore and remains to be seen if it gets into
Boston or is offset by developing diurnal heating. Another area
of low clouds and fog should burn off across the Cape/Islands
this morning...but may return later this afternoon or by
evening. Light N-NE winds become light S-SE with sea breezes
developing on portions of the immediate coast.
Tonight...Moderate confidence.
Areas of IFR-LIFR may expand westward off the ocean with
light/calm winds coupled with cooling boundary layer and
lingering low level moisture. However...it is uncertain as to
how far west these low cloud/fog will get. Greatest risk for low
clouds and fog will be across eastern MA.
Sunday...Moderate confidence.
Mostly VFR with the chance for scattered showers mostly in the
afternoon. Onshore flow prevails with light winds.
KBOS Terminal...Low confidence in TAF. Main concern is if a low
cloud/fog bank covering the north shore continues to push
southwest and impacts the terminal for a few hours today. Or if
diurnal heating breaks it up before entering the terminal.
KBDL Terminal...High confidence in TAF.
Outlook /Sunday Night through Wednesday/...
Sunday Night through Monday Night: VFR.
Tuesday: VFR. Breezy. Chance SHRA, chance TSRA.
Tuesday Night: VFR. Breezy. Slight chance SHRA, slight chance
TSRA.
Wednesday: VFR. Breezy.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Sunday..High confidence.
A weak pressure gradient will keep winds/seas below small craft
advisory thresholds through tonight. With earlier showers and
storms having long since moved out of our waters, areas of fog
may impact the waters at times through early this morning.
Some fog may linger through today and even tonight in the
eastern waters while showers may impact the southern outer and
ocean waters today. Fog may also redevelop tonight in areas
over the southern waters that see some clearing today. However,
winds remain very light (below 10 kt!) into Sunday and seas also
remain generally between 2-3 ft. Fog should diminish greatly for
Sunday.
Outlook /Sunday Night through Wednesday/...
Sunday Night through Monday Night: Winds less than 25 kt.
Tuesday: Winds less than 25 kt. Slight chance of rain showers.
Tuesday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Chance of rain showers, slight chance of
thunderstorms.
Wednesday: Moderate risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas locally approaching 5 ft. Slight chance
of rain showers.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.
&&
$$
DISCUSSION...Hrencecin
AVIATION...Frank
MARINE...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: 9 Very High
Current (Estimated): 9 Very 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:
0.12 in
Friday:
1.93 in
June:
11.81 in
2026
51.1 in
Season Snow:
Daily Extremes [‒] Daily Extremes [+]
1:01pm
78.3°F
High today:
5:19am
63.5°F
Low today:
4:28pm
77.5°F
High Friday:
7:34am
64.8°F
Low Friday:
12:45pm
68.4°F
High dew pt today:
1:24pm
68.9°F
High dew pt Friday:
7:38am
2 mph
Wind gust today:
11:31am
10 mph
Wind gust Friday:
Alerts / Advisories [‒] Alerts / Advisories [+]
No alerts/warnings active for Southeast Middlesex County.
Sun / Moon [‒] Sun / Moon [+]
First Light:
4:35am
Sunrise:
5:10am
Sunset:
8:26pm
Twilight ends:
9:01pm
Daylight length:
15 hours 16 minutes
Phase:
Waxing Gibbous (95%)
Moon set:
2:47am
Moon rise:
7:02pm
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