Lexington Weather
Lexington, Massachusetts, USA
- Mostly cloudy
-
72.5°F / 22.5°C
-
59.5°F
-
64%
- Calm, 10-min avg: Calm, gust: 3 mph
- 10 miles
- 0.00 in
Current Conditions [‒] Current Conditions [+]
72.5°F
22.5°C
Comfortable
Mostly cloudy
This Afternoon: Hi 74 °F
Tonight: Lo 62 °F
Dew Point:
59.5°F
Humidity:
64%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Sunday: 0.00 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 3 mph
Forecast [‒] Forecast [+]
NWS Weather Forecast -
This Afternoon,
Tonight,
&
Tuesday
through
Sunday Night
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Mon Jul 6, 2026 11:58am EDT
Overview:
- Periods of heavy rain & possibly a few embedded t-storms today into Tue across parts of CT/RI/SE MA. Localized flash flooding possible dependent on if the heaviest bands setup in our region. Otherwise...rain overspreads the rest of the region through tonight but amounts will be lighter especially near the NH border.
- Summer warmth & humidity return for the latter half of the week. Mainly dry weather returns Wed into Thu...But the risk for a few showers & t-storms may return by Fri perhaps lingering into Sat.
This Afternoon:
Chance Rain Showers
Hi 74 °F
A chance of rain showers. Cloudy, with a high near 74. Southeast wind around 10 mph. Chance of precipitation is 40%.
Tonight:
Showers And T-Storms
Lo 62 °F
Rain showers likely before midnight, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 62. East wind 7 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday:
Rain Showers
Hi 69 °F
Rain showers. Cloudy, with a high near 69. Northeast wind around 14 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night:
Chance Rain Showers
Lo 57 °F
A chance of rain showers. Mostly cloudy, with a low around 57. Northeast wind 6 to 13 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Wednesday:
Mostly Sunny
Hi 82 °F
Mostly sunny, with a high near 82. Northeast wind around 6 mph.
Wednesday Night:
Mostly Clear
Lo 66 °F
Mostly clear, with a low around 66. South wind around 5 mph.
Thursday:
Mostly Sunny
Hi 90 °F
Mostly sunny, with a high near 90. Southwest wind 5 to 9 mph.
Thursday Night:
Partly Cloudy
Lo 70 °F
Partly cloudy, with a low around 70. Southwest wind 6 to 9 mph.
Friday:
Partly Sunny then Chance Showers And T-Storms
Hi 87 °F
A chance of rain showers between noon and 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 87. West wind around 8 mph. Chance of precipitation is 50%.
Friday Night:
Chance Showers And T-Storms
Lo 62 °F
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. West wind around 6 mph. Chance of precipitation is 50%.
Saturday:
Slight Chance Rain Showers then Chance Showers And T-Storms
Hi 83 °F
A slight chance of rain showers before 2pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 83. Northeast wind around 7 mph. Chance of precipitation is 30%.
Saturday Night:
Chance Showers And T-Storms
Lo 62 °F
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 62. Northwest wind around 5 mph. Chance of precipitation is 30%.
Sunday:
Sunny then Slight Chance Showers And T-Storms
Hi 84 °F
A slight chance of showers and thunderstorms after 3pm. Sunny, with a high near 84. Southwest wind 3 to 7 mph.
Sunday Night:
Slight Chance Showers And T-Storms
Lo 63 °F
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 63. Southwest wind around 6 mph.
NWS Hourly Forecast -
Today 12pm through Tue 11pm
Issued by:
National Weather Service Boston / Norton, MA
Updated Mon Jul 6, 2026 11:58am EDT
12:00pm
Dew Pt 59°F
SE 8 mphPrecip: 19%
1:00pm
Dew Pt 59°F
E 8 mphPrecip: 19%
2:00pm
Dew Pt 60°F
E 9 mphPrecip: 19%
3:00pm
Dew Pt 58°F
E 9 mphPrecip: 26%
4:00pm
Dew Pt 58°F
E 9 mphPrecip: 32%
5:00pm
Dew Pt 58°F
E 10 mphPrecip: 39%
6:00pm
Dew Pt 59°F
E 9 mphPrecip: 45%
7:00pm
Dew Pt 59°F
E 8 mphPrecip: 52%
Rain: 0.01 in
8:00pm
Dew Pt 59°F
E 7 mphPrecip: 58%
Rain: 0.02 in
9:00pm
Dew Pt 59°F
E 8 mphPrecip: 63%
Rain: 0.02 in
10:00pm
Dew Pt 59°F
E 8 mphPrecip: 67%
Rain: 0.03 in
11:00pm
Dew Pt 59°F
E 9 mphPrecip: 72%
Rain: 0.03 in
12:00am
Dew Pt 59°F
E 9 mphPrecip: 77%
Rain: 0.03 in
1:00am
Dew Pt 60°F
E 10 mphPrecip: 81%
Rain: 0.03 in
2:00am
Dew Pt 60°F
E 10 mphPrecip: 86%
Rain: 0.07 in
3:00am
Dew Pt 60°F
E 10 mphPrecip: 85%
Rain: 0.07 in
4:00am
Dew Pt 60°F
E 10 mphPrecip: 84%
Rain: 0.07 in
5:00am
Dew Pt 61°F
E 10 mphPrecip: 84%
Rain: 0.07 in
6:00am
Dew Pt 61°F
NE 12 mphPrecip: 83%
Rain: 0.06 in
7:00am
Dew Pt 61°F
NE 12 mphPrecip: 82%
Rain: 0.06 in
8:00am
Dew Pt 61°F
NE 12 mphPrecip: 81%
Rain: 0.04 in
9:00am
Dew Pt 62°F
NE 13 mphPrecip: 79%
Rain: 0.04 in
10:00am
Dew Pt 61°F
NE 13 mphPrecip: 76%
Rain: 0.04 in
11:00am
Dew Pt 62°F
NE 14 mphPrecip: 74%
Rain: 0.04 in
12:00pm
Dew Pt 62°F
NE 14 mphPrecip: 72%
Rain: 0.04 in
1:00pm
Dew Pt 62°F
NE 14 mphPrecip: 69%
Rain: 0.04 in
2:00pm
Dew Pt 62°F
NE 14 mphPrecip: 67%
Rain: 0.02 in
3:00pm
Dew Pt 62°F
NE 14 mphPrecip: 62%
Rain: 0.02 in
4:00pm
Dew Pt 61°F
NE 14 mphPrecip: 56%
Rain: 0.02 in
5:00pm
Dew Pt 62°F
NE 13 mphPrecip: 51%
Rain: 0.02 in
6:00pm
Dew Pt 61°F
NE 13 mphPrecip: 45%
Rain: 0.01 in
7:00pm
Dew Pt 61°F
NE 13 mphPrecip: 40%
Rain: 0.01 in
8:00pm
Dew Pt 61°F
NE 12 mphPrecip: 34%
Rain: 0.01 in
9:00pm
Dew Pt 61°F
NE 10 mphPrecip: 32%
Rain: 0.01 in
10:00pm
Dew Pt 61°F
NE 8 mphPrecip: 31%
Rain: 0.01 in
11:00pm
Dew Pt 62°F
N 6 mphPrecip: 29%
Rain: 0.01 in
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 061110
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
710 AM EDT Mon Jul 6 2026
.WHAT HAS CHANGED...
The Flood Watch has been expanded across the rest of southeast
Massachusetts into Tuesday.
&&
.KEY MESSAGES...
- Periods of heavy rain & possibly a few embedded t-storms today
into Tue across parts of CT/RI/SE MA. Localized flash flooding
possible dependent on if the heaviest bands setup in our region.
Otherwise...rain overspreads the rest of the region through tonight
but amounts will be lighter especially near the NH border.
- Summer warmth & humidity return for the latter half of the
week. Mainly dry weather returns Wed into Thu...But the risk
for a few showers & t-storms may return by Fri perhaps
lingering into Sat.
&&
.DISCUSSION...
KEY MESSAGE 1...Periods of heavy rain & possibly a few embedded
t-storms today into Tue across parts of CT/RI/SE MA. Localized
flash flooding possible dependent on if the heaviest bands setup
in our region. Otherwise...rain overspreads the rest of the region
through tonight but amounts will be lighter especially near the NH
border.
The main forecast concern is the potential for localized flash
flooding across parts of CT/RI/SE MA into Tue. This remains a very
difficult forecast as the narrow bands of potentially extremely
heavy rain are quite difficult to forecast in terms of timing and
locations. However...the environment in place does favor the
potential for them to form. We will discuss this in more detail
below.
The environment in place is favorable for the potential of localized
flash flooding. Weak high pressure across eastern Canada was
enforcing a shallow boundary in the vicinity of CT/NY/NJ. This
boundary was being impinged upon by a modest southeast LLJ coupled
with a Pwat plume of 1.5 to 2.0+ inches. The idea though is that you
are combining winter-like synoptic features with summertime moisture
parameters. That combination can lead to localized extreme rainfall
events. This potential is indicated by various model suites printing
out narrow bands of very high QPF. The issue is that these narrow
bands of potentially extreme QPF are depicted in a lot of different
locations depending on what model you are looking at. This is quite
common in these cases that the models are good at indicating the
potential for a localized torrential rain events...But struggle to
pin the location.
Given the above...we have expanded the Flood Watch from CT/RI across
the rest of southeast MA. We are looking at widespread rainfall
amounts of 1-3"...but localized 4-6" amounts would be possible
within 6 hours if any narrow bands setup. Not all the models show
these narrow bands developing...but many of the CAMs do and it is
reasonable given the parameters in place. If they do develop...some
CAMs focus it to our south while other bring it into our region.
Regardless...the Flood Watch is certainly warranted give the
potential if these bands are realized.
Across the rest of the region...rain amounts will be lighter
especially towards the NH border. In fact...it may take until later
tonight for the steady rain to finally reach northeast MA. Periods
of rain will persist into Tuesday especially across eastern MA/RI as
closed 850 mb low may setup a mid level deformation zone.
KEY MESSAGE 2...Summer warmth & humidity return for the latter half
of the week. Mainly dry weather returns Wed into Thu...But the risk
for a few showers & t-storms may return by Fri perhaps lingering
into Sat.
As the shortwave departs the region...a mid level ridge axis builds
over the region with mainly dry weather returning Wed into at least
a good part of Thu. Rising height fields should allow summer-like
warmth and humidity to return. Highs may take a run at 90 in some
spots by Thu. The next shortwave trough may bring the risk for a few
showers and thunderstorms returning by Fri which may linger into
Sat. This will depend on the timing of the shortwave/cold front.
&&
.AVIATION /12Z MONDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
12Z TAF Update...
Today through Tuesday...Moderate confidence.
VFR conditions early this morning will gradually deteriorate to MVFR
levels today into tonight from southwest to northeast with brief
bouts of IFR conditions possible too. This will be associated with
periods of rain...which may fall heavy at times across parts of
CT/RI/SE MA where there may even be an embedded t-storm or two. The
process of lower cigs/vsbys and steady rain will be slowest to
arrive across northeast MA...where it may take until this evening or
even later for MVFR conditions to develop. Periods of rain will
continue into Tue especially across eastern MA/RI. MVFR with
localized IFR conditions will also continue into Tue. E winds 6-12
knots today gradually becoming NE at 8-16 knots by Tue.
KBOS Terminal...Moderate confidence in TAF.
KBDL Terminal...Moderate confidence in TAF.
Outlook /Tuesday Night through Friday/...
Tuesday Night: Mainly VFR, with areas IFR possible. Breezy.
Slight chance SHRA.
Wednesday: VFR. Breezy.
Wednesday Night: VFR.
Thursday through Thursday Night: VFR. Breezy.
Friday: VFR. Breezy. Chance SHRA, chance TSRA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Today through Tuesday...High confidence.
Weak high pressure over eastern Canada will combined with low
pressure tracking south of the waters. The result will be E wind
gusts of 20 to 30 knots developing from south to north today into
tonight and continuing into Tue shifting to more of a NE direction.
Therefore...have small craft headlines for the open waters and seas
building to between 3 and 5 feet.
Outlook /Tuesday Night through Friday/...
Tuesday Night: Winds less than 25 kt. Seas up to 5 ft. Chance
of rain showers.
Wednesday: Winds less than 25 kt. Seas up to 5 ft.
Wednesday Night: Winds less than 25 kt. Areas of seas
approaching 5 ft.
Thursday: Winds less than 25 kt. Seas locally approaching 5 ft.
Thursday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft. Slight chance of rain
showers.
Friday: Winds less than 25 kt. Areas of seas approaching 5 ft.
Slight chance of rain showers, slight chance of thunderstorms.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Flood Watch through Tuesday afternoon for CTZ002>004.
MA...Flood Watch through Tuesday afternoon for MAZ017>022.
RI...Flood Watch through Tuesday afternoon for RIZ001>008.
MARINE...Small Craft Advisory from 2 AM to 8 PM EDT Tuesday for
ANZ231>234-250-251-254.
Small Craft Advisory from 11 AM this morning to 8 PM EDT
Tuesday for ANZ235-237-255-256.
&&
$$
DISCUSSION...Frank
AVIATION...Frank/RM
MARINE...Frank
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): 4 Medium
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
Sunday:
0.22 in
July:
12.04 in
2026
Daily Extremes [‒] Daily Extremes [+]
12:23pm
74.5°F
High today:
7:44am
66.9°F
Low today:
1:42pm
82.8°F
High Sunday:
6:01am
65.7°F
Low Sunday:
12:00am
62.8°F
High dew pt today:
12:00am
70.0°F
High dew pt Sunday:
1:40pm
83.8°F
High heat index Sunday:
4:29am
6 mph
Wind gust today:
11:53am
5 mph
Wind gust Sunday:
Alerts / Advisories [‒] Alerts / Advisories [+]
No alerts/warnings active for Southeast Middlesex County.
Sun / Moon [‒] Sun / Moon [+]
First Light:
4:41am
Sunrise:
5:15am
Sunset:
8:25pm
Twilight ends:
8:59pm
Daylight length:
15 hours 10 minutes
Phase:
Waning Gibbous (62%)
Moon set:
11:52am
Moon rise:
11:44pm
Social Media - Mastodon [‒] Social Media - Mastodon [+]
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