Lexington Weather
Lexington, Massachusetts, USA
- Clear
-
43.0°F / 6.1°C
-
39.7°F
-
88%
-
SW 1 mph, 10-min avg: 1 mph, gust: 3 mph
- 10 miles
- 0.00 in
Current Conditions [‒] Current Conditions [+]
43.0°F
6.1°C
Chilly
Clear
Overnight: Lo 34 °F
Monday: Hi 66 °F
Dew Point:
39.7°F
Humidity:
88%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Sunday: 0.00 in
Visibility: 10 miles
Wind:
Now: 1 mph
Avg: 1 mph
Gusts: 3 mph
Forecast [‒] Forecast [+]
NWS Weather Forecast -
Overnight,
Monday,
&
Monday Night
through
Sunday
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Mon Mar 9, 2026 2:49am EDT
Overnight:
Patchy Fog
Lo 34 °F
Patchy fog after 5am. Mostly clear, with a low around 34. Southwest wind around 6 mph.
Monday:
Patchy Fog then Sunny
Hi 66 °F
Patchy fog before 8am. Sunny, with a high near 66. Southwest wind 5 to 9 mph, with gusts as high as 23 mph.
Monday Night:
Clear then Patchy Fog
Lo 33 °F
Patchy fog after 2am. Clear, with a low around 33. Southwest wind 5 to 8 mph.
Tuesday:
Patchy Fog then Sunny
Hi 71 °F
Patchy fog before 8am. Sunny, with a high near 71. Southwest wind around 6 mph.
Tuesday Night:
Partly Cloudy
Lo 42 °F
Partly cloudy, with a low around 42. Southwest wind around 6 mph.
Wednesday:
Chance Light Rain
Hi 56 °F
A chance of rain after 10am. Mostly cloudy, with a high near 56. East wind 5 to 8 mph. Chance of precipitation is 30%.
Wednesday Night:
Chance Light Rain
Lo 49 °F
A chance of rain. Mostly cloudy, with a low around 49. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Thursday:
Light Rain Likely
Hi 57 °F
Rain likely. Mostly cloudy, with a high near 57. West wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Thursday Night:
Chance Light Snow
Lo 27 °F
A chance of rain before 8pm, then a chance of snow between 8pm and 2am. Partly cloudy, with a low around 27. Northwest wind 8 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Friday:
Partly Sunny then Slight Chance Light Snow
Hi 43 °F
A slight chance of snow between 4pm and 5pm, then a slight chance of rain and snow. Partly sunny, with a high near 43. Southwest wind 6 to 10 mph.
Friday Night:
Rain And Snow Likely
Lo 34 °F
Rain and snow likely. Mostly cloudy, with a low around 34. Southwest wind around 10 mph. Chance of precipitation is 60%. New snow accumulation of less than half an inch possible.
Saturday:
Chance Light Snow
Hi 46 °F
A chance of snow before 11am, then a slight chance of rain and snow between 11am and 3pm. Partly sunny, with a high near 46. West wind 9 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New snow accumulation of less than half an inch possible.
Saturday Night:
Partly Cloudy
Lo 28 °F
Partly cloudy, with a low around 28. West wind 5 to 9 mph.
Sunday:
Slight Chance Light Snow
Hi 47 °F
A slight chance of snow between 8am and 2pm, then a chance of rain and snow. Mostly cloudy, with a high near 47. Southwest wind 5 to 9 mph.
NWS Hourly Forecast -
Today 4am through Tue 3pm
Issued by:
National Weather Service Boston / Norton, MA
Updated Mon Mar 9, 2026 2:49am EDT
4:00am
Dew Pt 33°F
Wind Chill: 35°F
SW 6 mphPrecip: 0%
5:00am
Dew Pt 34°F
Wind Chill: 33°F
SW 5 mphPrecip: 0%
6:00am
Dew Pt 33°F
Wind Chill: 32°F
SW 5 mphPrecip: 0%
7:00am
Dew Pt 32°F
Wind Chill: 30°F
SW 5 mphPrecip: 0%
8:00am
Dew Pt 33°F
Wind Chill: 31°F
SW 5 mphPrecip: 0%
9:00am
Dew Pt 36°F
Wind Chill: 36°F
S 5 mphPrecip: 0%
10:00am
Dew Pt 38°F
Wind Chill: 42°F
S 6 mphPrecip: 1%
11:00am
Dew Pt 40°F
S 6 mphPrecip: 0%
12:00pm
Dew Pt 41°F
S 7 mphPrecip: 0%
1:00pm
Dew Pt 41°F
S 8 mphPrecip: 0%
2:00pm
Dew Pt 43°F
SW 9 mphPrecip: 0%
3:00pm
Dew Pt 42°F
SW 9 mphPrecip: 0%
4:00pm
Dew Pt 40°F
SW 9 mphPrecip: 0%
5:00pm
Dew Pt 41°F
S 8 mphPrecip: 0%
6:00pm
Dew Pt 41°F
S 8 mphPrecip: 0%
7:00pm
Dew Pt 40°F
Wind Chill: 44°F
SW 8 mphPrecip: 0%
8:00pm
Dew Pt 39°F
Wind Chill: 38°F
SW 7 mphPrecip: 0%
9:00pm
Dew Pt 39°F
Wind Chill: 36°F
SW 7 mphPrecip: 0%
10:00pm
Dew Pt 38°F
Wind Chill: 38°F
SW 7 mphPrecip: 0%
11:00pm
Dew Pt 37°F
Wind Chill: 40°F
SW 7 mphPrecip: 0%
12:00am
Dew Pt 37°F
Wind Chill: 40°F
SW 7 mphPrecip: 1%
1:00am
Dew Pt 37°F
Wind Chill: 38°F
SW 6 mphPrecip: 1%
2:00am
Dew Pt 37°F
Wind Chill: 36°F
SW 6 mphPrecip: 1%
3:00am
Dew Pt 37°F
Wind Chill: 34°F
SW 6 mphPrecip: 1%
4:00am
Dew Pt 36°F
Wind Chill: 31°F
SW 6 mphPrecip: 1%
5:00am
Dew Pt 35°F
Wind Chill: 31°F
SW 5 mphPrecip: 1%
6:00am
Dew Pt 33°F
Wind Chill: 29°F
SW 5 mphPrecip: 1%
7:00am
Dew Pt 33°F
Wind Chill: 29°F
SW 5 mphPrecip: 1%
8:00am
Dew Pt 35°F
Wind Chill: 31°F
SW 5 mphPrecip: 0%
9:00am
Dew Pt 39°F
Wind Chill: 37°F
SW 3 mphPrecip: 0%
10:00am
Dew Pt 41°F
Wind Chill: 45°F
SW 3 mphPrecip: 1%
11:00am
Dew Pt 42°F
SW 5 mphPrecip: 1%
12:00pm
Dew Pt 43°F
SW 5 mphPrecip: 1%
1:00pm
Dew Pt 43°F
SW 6 mphPrecip: 0%
2:00pm
Dew Pt 45°F
S 6 mphPrecip: 0%
3:00pm
Dew Pt 44°F
S 6 mphPrecip: 0%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 090651
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
251 AM EDT Mon Mar 9 2026
.WHAT HAS CHANGED...
No significant changes to the forecast. High confidence in near
record high temperatures on Tuesday.
&&
.KEY MESSAGES...
- Area of fog quickly dissipate by mid-morning.
Otherwise...sunshine returns today & Tue with well above
normal temps. Highs mainly in the 60s today & near record
highs Tue in the upper 60s to lower 70s away from parts of the
immediate coast.
- Trending more unsettled mid to late week with a round or two of
precipitation. Back to cool temperatures by Friday.
- Expecting significant snowmelt over the coming week. Minor
river flooding possible.
&&
.DISCUSSION...
KEY MESSAGE 1...Area of fog quickly dissipate by mid-morning.
Otherwise...sunshine returns today & Tue with well above normal
temps. Highs mainly in the 60s today & near record highs Tue in the
upper 60s to lower 70s away from parts of the immediate coast.
Areas of fog covered the region early this morning especially near
the south coast where it was locally dense. The fog will quickly
burn off after sunrise given a lot of dry air just above the
boundary layer.
Unlike the weekend...model soundings indicate lots of sunshine today
and Tue. This will allow that anomalous warmth in the 850/925 mb
layers to begin to mix down to the surface. 925T around +10C today
should allow many locations to see highs well into the 60s. Mainly
clear skies & light winds will still allow for another good night of
radiational cooling tonight. Low temps tonight should bottom out in
the upper 20s & 30s...but lower 40s in the Urban Heat Island of
Boston as well as Worcester airport given the anomalous warm air
aloft.
By Tue...925T near +14C should allow for near record high temps in
the upper 60s to the lower 70s! We feel that given the overall
setup...the NBM is significantly too cool with the high temps today
and Tue. Of course it will be noticeably cooler on the immediate
south coast, Cape and Islands given the modified marine airmass
given S-SW winds. We may also need to watch for a subtle sea breeze
potential on Tue on parts of the immediate eastern MA coast...but
that remains uncertain. All in all...well above normal
temps/springlike weather is on tap for the next two days with near
record highs possible on Tue.
KEY MESSAGE 2...Trending more unsettled mid to late week with a
round or two of precipitation. Back to cool temperatures by Friday.
After a dry and sunny few days Wednesday will be a transition day
between early week ridging and a shortwave trough that crosses the
region on Thursday. Ahead of said trough warm SW flow continues,
keeping temperatures elevated. However, increasing moisture moves
north as well so the clouds return keeping a check on temps, only
reaching the upper 50s to low 60s. A caveat is that in extreme
northeast MA a backdoor cold front may reduce temperatures further.
A weaker leading wave moves through on Wednesday increasing the
chance for scattered rain showers, mainly over the interior. It
isn't until Thursday that the main trough and robust cold front move
through. Favorable placement beneath the RRQ of a 150kt 300 mb jet
combined with a 65kt LLJ will work on a moist environment (PWATs
near 1.25") to produce widespread precipitation Thursday into
Thursday night. It likely starts as rain for all before
transitioning to snow on the back end for the high terrain.
Friday the post frontal airmass overhead means cooler temperatures,
in the 40s. Another disturbance passing to our north may bring some
scattered rain/high elevation snow showers around Friday night but
confidence is low in specifics on how the pattern evolves beyond
Thursday.
KEY MESSAGE 3...Expecting significant snowmelt over the coming week.
Minor river flooding possible.
Given the prolonged period of elevated temperatures/dewpoints,
combined with the significant melting we've seen the last few days,
snowmelt will increasingly contribute back to the watershed leading
to rises, potentially into minor flood stage. Guidance continues to
indicate the most likely spots to see flooding are along the
Connecticut River by next weekend with addition of S. RI rivers by
early next week.
&&
.AVIATION /06Z MONDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
06z TAF Update...
Today...High confidence.
LIFR conditions will persist along the south coast, Cape and
Islands early this morning in widespread fog which will be
dense at times. This fog should finally burn off through the
morning. Otherwise...VFR conditions persist across the rest of
the region. Calm/light SW winds tonight. Winds will be from the
S-SW at 7 to 15 knots.
Tonight...High confidence.
Mainly VFR. Risk for IFR in stratus and fog towards the Cape and
islands late.
Tuesday...High Confidence.
VFR with chance for MVFR at ACK. SW winds 5-10 kts.
KBOS Terminal...High confidence in TAF.
KBDL Terminal...High confidence in TAF.
Outlook /Tuesday through Friday/...
Tuesday through Tuesday Night: VFR.
Wednesday: Mainly VFR, with local IFR possible. Breezy. Slight
chance RA.
Wednesday Night: Windy with local gusts up to 30 kt. Chance RA.
Thursday: Windy with gusts up to 30 kt. Chance RA, chance SN.
Thursday Night: Windy with local gusts up to 30 kt. Chance RA,
slight chance SN.
Friday: Breezy. Slight chance RA, slight chance SN.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Today through Tuesday...High confidence.
The last of the lingering small craft swell should finally drop
below criteria across our southern outer-waters by mid-late morning.
Otherwise...a weak pressure gradient will keep winds and seas below
small craft advisory thresholds through Tue. Areas of fog...some of
which will be dense at times will impact our southern waters during
the overnight and early morning hours. This will result in poor
vsbys for mariners at times.
Outlook /Tuesday through Friday/...
Tuesday through Tuesday Night: Winds less than 25 kt.
Wednesday: Winds less than 25 kt. Seas locally approaching
5 ft. Slight chance of rain.
Wednesday Night: Strong winds with gusts up to 30 kt. Areas of
rough seas. Chance of rain, slight chance of thunderstorms.
Thursday: Strong winds with gusts up to 30 kt. Rough seas up to
10 ft. Chance of rain.
Thursday Night: Strong winds with gusts up to 35 kt. Rough seas
up to 9 ft. Chance of rain, slight chance of snow.
Friday: Low risk for Small Craft Advisory winds with gusts up
to 30 kt. Seas up to 5 ft.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 10 AM EDT this morning for
ANZ254>256.
&&
$$
DISCUSSION...Frank/BW
AVIATION...Frank/BW
MARINE...Frank/BW
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): 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:
0.00 in
Rain Today:
0.00 in
Sunday:
1.45 in
March:
3.16 in
2026
8.5 in
Snow Depth:
50.9 in
Season Snow:
3 snow days in March
Daily Extremes [‒] Daily Extremes [+]
1:48am
45.7°F
High today:
3:54am
42.6°F
Low today:
1:58pm
55.6°F
High Sunday:
11:38pm
44.4°F
Low Sunday:
3:56am
38.3°F
Low wind chill today:
12:49am
42.1°F
Low wind chill Sunday:
1:48am
42.1°F
High dew pt today:
12:19pm
52.7°F
High dew pt Sunday:
12:52am
7 mph
Wind gust today:
12:49am
16 mph
Wind gust Sunday:
Alerts / Advisories [‒] Alerts / Advisories [+]
No alerts/warnings active for Southeast Middlesex County.
Expected Snow [‒] Expected Snow [+]
72-Hour Snowfall Forecast
No snow expected in Lexington.
Sun / Moon [‒] Sun / Moon [+]
First Light:
6:39am
Sunrise:
7:07am
Sunset:
6:44pm
Twilight ends:
7:12pm
Daylight length:
11 hours 38 minutes
Phase:
Waning Gibbous (69%)
Moon rise:
12:36am
Moon set:
9:36am
Social Media - Mastodon [‒] Social Media - Mastodon [+]
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