Lexington Weather
Lexington, Massachusetts, USA
- Clear
-
54.1°F / 12.3°C
-
48.7°F
-
82%
- Calm, 10-min avg: Calm, gust: None
- 10 miles
- 0.29 in
Current Conditions [‒] Current Conditions [+]
54.1°F
12.3°C
Cool
Clear
Tonight: Lo 58 °F
Friday: Hi 72 °F
Dew Point:
48.7°F
Humidity:
82%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.29 in
Rain Wednesday: 0.00 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
Forecast [‒] Forecast [+]
NWS Weather Forecast -
Tonight,
Friday,
&
Friday Night
through
Thursday
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Thu Apr 16, 2026 6:34pm EDT
Tonight:
Slight Chance Light Rain then Patchy Fog
Lo 58 °F
A slight chance of rain before 7pm, then patchy fog between 2am and 4am, then patchy fog and a slight chance of rain showers. Mostly cloudy, with a low around 58. Southwest wind 2 to 7 mph. Chance of precipitation is 20%.
Friday:
Chance Showers And T-Storms
Hi 72 °F
A chance of rain showers and patchy fog before 11am, then a chance of showers and thunderstorms. Cloudy. High near 72, with temperatures falling to around 65 in the afternoon. North wind 2 to 9 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Friday Night:
Chance Rain Showers then Mostly Cloudy
Lo 48 °F
A chance of rain showers before 8pm. Mostly cloudy, with a low around 48. Northeast wind 3 to 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Saturday:
Mostly Cloudy
Hi 59 °F
Mostly cloudy, with a high near 59. Northeast wind around 7 mph.
Saturday Night:
Mostly Cloudy then Slight Chance Rain Showers
Lo 47 °F
A slight chance of rain showers after 2am. Mostly cloudy, with a low around 47. Southeast wind 3 to 7 mph. Chance of precipitation is 20%.
Sunday:
Rain Showers
Hi 59 °F
Rain showers. Cloudy, with a high near 59. Southwest wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Sunday Night:
Rain Showers Likely
Lo 35 °F
Rain showers likely. Mostly cloudy, with a low around 35. West wind around 9 mph. Chance of precipitation is 70%.
Monday:
Slight Chance Rain Showers then Mostly Sunny
Hi 48 °F
A slight chance of rain showers between 8am and 9am. Mostly sunny, with a high near 48. West wind 8 to 12 mph.
Monday Night:
Partly Cloudy
Lo 29 °F
Partly cloudy, with a low around 29. Northwest wind 5 to 9 mph.
Tuesday:
Sunny
Hi 52 °F
Sunny, with a high near 52. West wind 5 to 8 mph.
Tuesday Night:
Mostly Cloudy then Chance Rain Showers
Lo 39 °F
A chance of rain showers after 1am. Mostly cloudy, with a low around 39. Southwest wind around 8 mph. Chance of precipitation is 30%.
Wednesday:
Chance Rain Showers
Hi 62 °F
A chance of rain showers before 2pm. Partly sunny, with a high near 62. Southwest wind 7 to 10 mph. Chance of precipitation is 30%.
Wednesday Night:
Partly Cloudy
Lo 41 °F
Partly cloudy, with a low around 41. West wind 5 to 8 mph.
Thursday:
Mostly Sunny
Hi 60 °F
Mostly sunny, with a high near 60. Northwest wind 5 to 8 mph.
NWS Hourly Forecast -
Tonight 7pm through Sat 6am
Issued by:
National Weather Service Boston / Norton, MA
Updated Thu Apr 16, 2026 6:34pm EDT
7:00pm
Dew Pt 57°F
E 6 mphPrecip: 4%
8:00pm
Dew Pt 57°F
SE 6 mphPrecip: 3%
9:00pm
Dew Pt 57°F
S 5 mphPrecip: 6%
10:00pm
Dew Pt 57°F
S 5 mphPrecip: 10%
11:00pm
Dew Pt 56°F
S 5 mphPrecip: 13%
12:00am
Dew Pt 55°F
SW 6 mphPrecip: 12%
1:00am
Dew Pt 56°F
SW 5 mphPrecip: 10%
2:00am
Dew Pt 56°F
W 5 mphPrecip: 9%
3:00am
Dew Pt 55°F
W 3 mphPrecip: 13%
4:00am
Dew Pt 55°F
N 3 mphPrecip: 18%
5:00am
Dew Pt 55°F
NW 2 mphPrecip: 22%
6:00am
Dew Pt 55°F
NW 2 mphPrecip: 25%
7:00am
Dew Pt 53°F
NW 2 mphPrecip: 28%
8:00am
Dew Pt 56°F
W 2 mphPrecip: 31%
Rain: 0.02 in
9:00am
Dew Pt 59°F
NW 3 mphPrecip: 27%
Rain: 0.01 in
10:00am
Dew Pt 59°F
N 6 mphPrecip: 24%
Rain: 0.01 in
11:00am
Dew Pt 59°F
N 7 mphPrecip: 31%
Rain: 0.02 in
12:00pm
Dew Pt 59°F
N 8 mphPrecip: 37%
Rain: 0.04 in
1:00pm
Dew Pt 59°F
NE 9 mphPrecip: 44%
Rain: 0.05 in
2:00pm
Dew Pt 58°F
N 9 mphPrecip: 50%
Rain: 0.01 in
3:00pm
Dew Pt 57°F
NE 9 mphPrecip: 43%
Rain: 0.01 in
4:00pm
Dew Pt 55°F
NE 8 mphPrecip: 37%
Rain: 0.01 in
5:00pm
Dew Pt 54°F
NE 7 mphPrecip: 30%
Rain: 0.01 in
6:00pm
Dew Pt 53°F
NE 7 mphPrecip: 27%
Rain: 0.01 in
7:00pm
Dew Pt 52°F
NE 6 mphPrecip: 24%
8:00pm
Dew Pt 51°F
NE 5 mphPrecip: 21%
9:00pm
Dew Pt 50°F
NE 5 mphPrecip: 11%
10:00pm
Dew Pt 50°F
NE 5 mphPrecip: 10%
11:00pm
Dew Pt 50°F
NE 3 mphPrecip: 9%
12:00am
Dew Pt 50°F
NE 3 mphPrecip: 8%
1:00am
Dew Pt 50°F
NE 3 mphPrecip: 6%
2:00am
Dew Pt 50°F
NE 3 mphPrecip: 5%
3:00am
Dew Pt 50°F
NE 3 mphPrecip: 5%
4:00am
Dew Pt 49°F
NE 5 mphPrecip: 6%
5:00am
Dew Pt 49°F
NE 5 mphPrecip: 7%
6:00am
Dew Pt 49°F
NE 5 mphPrecip: 8%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 161913
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
313 PM EDT Thu Apr 16 2026
.WHAT HAS CHANGED...
No significant changes.
&&
.KEY MESSAGES...
- Scattered shower and a few thunderstorms possible tonight.
- Strong cold front will bring a round of widespread showers
late Sat night into Sunday, then drying out and turning
colder Sun night.
- Mainly dry and unseasonably cool Mon-Tue, then moderating
temperatures toward midweek. Next chance of showers will be
Tue night into early Wed.
&&
.DISCUSSION...
KEY MESSAGE 1...Scattered Showers and few thunderstorms possible
tonight. Few showers possible late Friday afternoon, low probability
(< 20%) for an isolated thunderstorm.
Ample warming this afternoon in western and central southern New
England. Satellite imagery this afternoon shows cumulus starting to
develop across those areas. A sign that at least marginal
instability is present. Something to keep tabs on given that we have
potential for scattered showers and thunderstorms in the forecast
tonight in response to a shortwave trough. Winds aloft increase this
evening which will bring in better bulk shear values. All that being
said, we can still see a risk for scattered thunderstorms generally
after sunset. Where higher instability and sufficient shear overlap
in far west/NW MA, can't rule out a strong to severe storm. Overall
CAMs show limited coverages of storms as they develop and move
eastward after sunset. A round or two of scattered showers are also
possible overnight and into early Friday morning.
Cooler day Friday compared the Thursday, especially for the
locations that were well into the 80s in western southern New
England on Thursday. Highs range in the 60s and 70s in west, central
southerne new england and mid 50s to lower 60s further east.
Isolated showers are possible, although lower confidence on exact
location of the showers given the lower coverage. Instability will
be marginal, but enough to support an isolated storm in the
afternoon.
KEY MESSAGE 2...Strong cold front will bring a round of widespread
showers late Sat night into Sunday, then drying out and turning
colder Sun night.
Surface ridging in control on Sat will provide dry weather with
temps more seasonable for mid April as onshore flow will prevail.
Then a fairly robust upper trough will approach from the Gt Lakes
with the attendant strong cold front moving through SNE during
Sunday. A plume of PWATs 1.25-1.5" move into SNE in the pre-frontal
environment Sat night into Sunday. Decent forcing for ascent ahead
of the upper trough acting on this moisture will result in an area
of widespread showers moving through the region late Sat night into
Sunday which may be enhanced along and just ahead of the front.
There is some elevated instability so can't rule out a few t-storms
as well.
The front will move through western New Eng by midday and eastern MA
during the afternoon. The column cools rapidly behind the front and
there may be enough lingering moisture for showers to end as some
snow showers in western MA, especially over the higher terrain but
if it happens not expecting any accumulation. PWATs drop quickly
from W to E late Sun and Sun night which will bring clearing skies
and turning much colder in the strong cold advection pattern. Temps
by Mon morning will drop to the low-mid 30s, with upper 20s over the
higher elevations. Brisk W-NW winds will result in wind chills in
the 20s around daybreak Mon.
KEY MESSAGE 3...Mainly dry and unseasonably cool Mon-Tue, then
moderating temperatures toward midweek. Next chance of showers will
be Tue night into early Wed.
Upper trough and core of coldest air aloft move through Mon into Mon
night so it will be unseasonably cool during this period. 850 mb
temps bottom out around -10C Mon night. Expect diurnal cu to develop
Mon but dry weather with highs mostly in the 40s to near 50 in the
coastal plain. Gusty W-NW winds will make it feel even cooler. Lows
will drop into the 20s Mon night with diminishing wind as high pres
builds into the region. Temps moderate slightly Tue but still chilly
with below normal temps, then temps get back to seasonable normals
Wed and Thu. Another northern stream shortwave may bring a few
showers Tue night into early Wed, otherwise mainly dry weather
through Thursday.
&&
.AVIATION /19Z THURSDAY THROUGH TUESDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through 00z Friday: High confidence overall, though is low to
moderate for Boston.
Mainly VFR. Stratus and mist still lurks offshore and is hugging the
eastern MA coastline and could at times work its way back into BOS
but it may not be that persistent, if it even does so at all thru
00z. Pop-up showers could develop near BDL and north of ORH as soon
as 22z but would be more likely after 00z. SSW winds around 5-10 kt,
with ENE/E winds for ORH, BED and BOS, with SE winds around 5 kt.
Tonight: Moderate confidence.
Mainly VFR; uncertain if BOS and BED see IFR/MVFR stratus layer
return but would be more likely tonight as the boundary layer cools
off. Couple periods of SHRA/possible TS: one 00z-03z mainly N/W of
ORH, with a somewhat better chance after 06z Fri. Carried PROB30s
for the time being since the coverage could be spotty. SW winds (E
winds near the eastern coast) around 5-10 kt become light in all
areas thru midnight then should come around to light northerly by
daybreak.
Friday: Moderate confidence.
Mainly MVFR, possibly IFR from low ceilings, with periods of
hit-or-mostly-miss showers. North to northeast winds 5-10 kt.
KBOS Terminal...Moderate confidence in TAF. VFR generally
governs thru 00z, but stratus and mist lurk offshore and could
at times bring periods of IFR. Better chance at IFR stratus
coming in tonight. Mainly dry but risk for rain showers after
06z Fri. NE/E winds 5-10 kt flip to light southwest briefly
overnight, then return to light northerly for Friday.
KBDL Terminal...High confidence in TAF.
Outlook /Friday Night through Tuesday/...
Saturday: Mainly VFR, with local MVFR possible.
Saturday Night: Mainly VFR, with areas IFR possible. Breezy.
Slight chance SHRA.
Sunday: Mainly VFR, with local IFR possible. Breezy. SHRA
likely.
Sunday Night: Mainly VFR, with local IFR possible. Breezy.
Chance SHRA, slight chance SHSN.
Monday: VFR. Breezy. Slight chance SHRA, slight chance SHSN.
Monday Night through Tuesday: VFR. Breezy.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
High confidence through the weekend.
Seas 2-5 ft and winds less than 25 kts. SW winds shift to NE
later Friday. Brief periods of marginal Small Craft Advisory
seas possible late tonight/early Fri AM over the southern outer
waters, though not expected to be widespread.
Passage of stronger cold Front Sun should bring SCA conditions
to at least outer waters Sun into Mon.
Outlook /Friday Night through Tuesday/...
Saturday through Saturday Night: Winds less than 25 kt.
Sunday: Winds less than 25 kt. Seas locally approaching 5 ft.
Rain showers likely.
Sunday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of seas approaching 5 ft. Chance of
rain showers.
Monday: Winds less than 25 kt. Areas of seas approaching 5 ft.
Slight chance of rain showers, slight chance of snow showers.
Monday Night through Tuesday: Winds less than 25 kt. Seas
locally approaching 5 ft.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.
&&
$$
DISCUSSION...Loconto/Hrencecin
AVIATION...Loconto/Mensch
MARINE...Loconto/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: 2 Low
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:
0.29 in
Rain Today:
0.00 in
Wednesday:
1.41 in
April:
7.03 in
2026
51.1 in
Season Snow:
1 snow day in April
Daily Extremes [‒] Daily Extremes [+]
2:06pm
70.2°F
High today:
6:40am
49.5°F
Low today:
12:44pm
76.6°F
High Wednesday:
10:07pm
51.8°F
Low Wednesday:
3:08am
47.1°F
Low wind chill today:
1:30pm
62.8°F
High dew pt today:
12:32pm
62.2°F
High dew pt Wednesday:
3:08am
8 mph
Wind gust today:
3:04pm
11 mph
Wind gust Wednesday:
Alerts / Advisories [‒] Alerts / Advisories [+]
No alerts/warnings active for Southeast Middlesex County.
Sun / Moon [‒] Sun / Moon [+]
First Light:
5:32am
Sunrise:
6:02am
Sunset:
7:28pm
Twilight ends:
7:57pm
Daylight length:
13 hours 26 minutes
Phase:
New Moon (0%)
Moon rise:
5:18am
Moon set:
6:51pm
Social Media - Mastodon [‒] Social Media - Mastodon [+]
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