Lexington Weather
Lexington, Massachusetts, USA
- Mostly cloudy
- 48.6°F / 9.2°C
-
42.6°F
-
80%
- Calm, 10-min avg: Calm, gust: None
- 10 miles
- 0.00 in
Current Conditions [‒] Current Conditions [+]
48.6°F
9.2°C
Chilly
Mostly cloudy
Overnight: Lo 45 °F
Saturday: Hi 58 °F
Dew Point:
42.6°F
Humidity:
80%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Friday: 0.00 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
Forecast [‒] Forecast [+]
NWS Weather Forecast -
Overnight,
Saturday,
&
Saturday Night
through
Friday
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sat May 2, 2026 2:32am EDT
Overview:
- Areas of light rain showers this morning with another round developing this afternoon. More widespread rain arrives for the Cape and Islands tonight.
- Turning drier and sunnier with a warming trend Monday and Tuesday.
- Increasing chance for showers and even thunderstorms mid to late week.
Overnight:
Chance Rain Showers
Lo 45 °F
A chance of rain showers. Mostly cloudy, with a low around 45. South wind around 5 mph. Chance of precipitation is 40%.
Saturday:
Rain Showers Likely
Hi 58 °F
Rain showers likely. Mostly cloudy, with a high near 58. South wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Saturday Night:
Chance Rain Showers
Lo 43 °F
A chance of rain showers. Cloudy, with a low around 43. West wind around 6 mph. Chance of precipitation is 40%.
Sunday:
Chance Rain Showers
Hi 59 °F
A chance of rain showers before 2pm. Partly sunny, with a high near 59. Northwest wind 6 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Sunday Night:
Mostly Clear
Lo 42 °F
Mostly clear, with a low around 42. West wind 6 to 9 mph.
Monday:
Mostly Sunny
Hi 68 °F
Mostly sunny, with a high near 68. Southwest wind 6 to 14 mph, with gusts as high as 25 mph.
Monday Night:
Mostly Clear
Lo 51 °F
Mostly clear, with a low around 51. Southwest wind 7 to 12 mph.
Tuesday:
Mostly Sunny
Hi 77 °F
Mostly sunny, with a high near 77. Southwest wind 8 to 14 mph, with gusts as high as 28 mph.
Tuesday Night:
Slight Chance Rain Showers
Lo 58 °F
A slight chance of rain showers after 10pm. Mostly cloudy, with a low around 58. South wind around 14 mph, with gusts as high as 25 mph.
Wednesday:
Chance Rain Showers
Hi 72 °F
A chance of rain showers. Mostly cloudy, with a high near 72. Southwest wind 12 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 50%.
Wednesday Night:
Rain Showers Likely
Lo 54 °F
Rain showers likely. Mostly cloudy, with a low around 54. Southwest wind 6 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Thursday:
Rain Showers Likely
Hi 63 °F
Rain showers likely. Mostly cloudy, with a high near 63. South wind 6 to 9 mph. Chance of precipitation is 70%.
Thursday Night:
Rain Showers Likely
Lo 46 °F
Rain showers likely. Mostly cloudy, with a low around 46. Southwest wind around 9 mph. Chance of precipitation is 70%.
Friday:
Chance Rain Showers
Hi 60 °F
A chance of rain showers. Partly sunny, with a high near 60. West wind 9 to 13 mph.
NWS Hourly Forecast -
Today 5am through Sun 4pm
Issued by:
National Weather Service Boston / Norton, MA
Updated Sat May 2, 2026 2:32am EDT
5:00am
Dew Pt 39°F
Wind Chill: 44°F
S 5 mphPrecip: 41%
6:00am
Dew Pt 39°F
Wind Chill: 45°F
S 5 mphPrecip: 39%
7:00am
Dew Pt 41°F
Wind Chill: 46°F
S 5 mphPrecip: 40%
8:00am
Dew Pt 42°F
Wind Chill: 48°F
S 6 mphPrecip: 47%
Rain: 0.01 in
9:00am
Dew Pt 43°F
S 6 mphPrecip: 56%
Rain: 0.01 in
10:00am
Dew Pt 43°F
S 6 mphPrecip: 55%
Rain: 0.01 in
11:00am
Dew Pt 43°F
S 7 mphPrecip: 49%
Rain: 0.01 in
12:00pm
Dew Pt 43°F
S 7 mphPrecip: 44%
Rain: 0.01 in
1:00pm
Dew Pt 44°F
S 8 mphPrecip: 42%
Rain: 0.01 in
2:00pm
Dew Pt 44°F
S 8 mphPrecip: 38%
Rain: 0.02 in
3:00pm
Dew Pt 43°F
S 8 mphPrecip: 39%
Rain: 0.02 in
4:00pm
Dew Pt 43°F
SW 7 mphPrecip: 30%
Rain: 0.01 in
5:00pm
Dew Pt 43°F
SW 6 mphPrecip: 25%
6:00pm
Dew Pt 44°F
SW 6 mphPrecip: 25%
7:00pm
Dew Pt 43°F
S 5 mphPrecip: 21%
8:00pm
Dew Pt 44°F
S 5 mphPrecip: 21%
9:00pm
Dew Pt 44°F
SW 5 mphPrecip: 22%
10:00pm
Dew Pt 44°F
Wind Chill: 49°F
W 3 mphPrecip: 26%
11:00pm
Dew Pt 42°F
Wind Chill: 48°F
W 3 mphPrecip: 32%
12:00am
Dew Pt 41°F
Wind Chill: 47°F
NW 3 mphPrecip: 35%
1:00am
Dew Pt 40°F
Wind Chill: 45°F
NW 5 mphPrecip: 37%
2:00am
Dew Pt 39°F
Wind Chill: 44°F
NW 5 mphPrecip: 31%
3:00am
Dew Pt 39°F
Wind Chill: 43°F
NW 5 mphPrecip: 35%
4:00am
Dew Pt 39°F
Wind Chill: 41°F
NW 6 mphPrecip: 38%
5:00am
Dew Pt 38°F
Wind Chill: 41°F
NW 6 mphPrecip: 31%
6:00am
Dew Pt 38°F
Wind Chill: 39°F
NW 6 mphPrecip: 32%
7:00am
Dew Pt 38°F
Wind Chill: 40°F
NW 7 mphPrecip: 30%
8:00am
Dew Pt 38°F
Wind Chill: 42°F
NW 8 mphPrecip: 19%
Rain: 0.01 in
9:00am
Dew Pt 37°F
Wind Chill: 43°F
NW 9 mphPrecip: 19%
Rain: 0.01 in
10:00am
Dew Pt 36°F
Wind Chill: 45°F
NW 10 mphPrecip: 19%
Rain: 0.01 in
11:00am
Dew Pt 35°F
NW 10 mphPrecip: 19%
Rain: 0.01 in
12:00pm
Dew Pt 33°F
NW 10 mphPrecip: 17%
1:00pm
Dew Pt 32°F
NW 10 mphPrecip: 15%
2:00pm
Dew Pt 30°F
NW 10 mphPrecip: 12%
3:00pm
Dew Pt 29°F
NW 10 mphPrecip: 10%
4:00pm
Dew Pt 28°F
NW 10 mphPrecip: 8%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 020700
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
300 AM EDT Sat May 2 2026
.WHAT HAS CHANGED...
No significant changes.
&&
.KEY MESSAGES...
- Areas of light rain showers this morning with another round developing
this afternoon. More widespread rain arrives for the Cape and
Islands tonight.
- Turning drier and sunnier with a warming trend Monday and Tuesday.
- Increasing chance for showers and even thunderstorms mid to late
week.
&&
.DISCUSSION...
KEY MESSAGE 1... Areas of light rain showers this morning with
another round developing this afternoon. More widespread rain
arrives for the Cape and Islands tonight.
Shortwave impulse provides enough lift for a round of scattered
showers early this morning across much of northern and central
Massachusetts. After a bit of a lull in the morning, the chance for
showers increases again this afternoon as a weak surface boundary
moves from west to east. CAMs show about 150-300 J/kg of surface
CAPE and low level lapse rates steepening to 8-9 C/km, sufficient
values for another wave scattered showers and perhaps a rumble of
thunder or two.
Attention turns to a sub-990 mb cyclone as it takes a track NE to a
path east of the 40N/70W benchmark for late this afternoon and
continuing northward into Sunday. There will be a sharp gradient on
the northwestern edge of the precip shield as drier air behind a
weak front makes its way into interior southern New England. The
latest NBM still has the western edge of steadier rains across the
MA/RI coastal plain to around I-495, where the GEFS and EPS
ensembles have a 60-80 percent chance of at least a half inch of
rain.
All told, not really a great weekend if your plans bring you to Cape
Cod or eastern MA and RI, but conditions in CT and western MA should
be quite a bit better. Highs mainly in the 50s on Saturday with
clouds and periods of showers, cooler lower 50s in southeast New
England; on Sunday, highs have a decent shot at reaching the low 60s
in western interior Southern New England, but are in the mid 50s
near the eastern coast as it will take quite a bit longer before we
can see peeks of sun develop.
KEY MESSAGE 2...Turning drier and sunnier with a warming trend
Monday and Tuesday.
Southwesterly flow advects a much warmer airmass in from the Mid
Atlantic Monday and Tuesday. 850 mb temperatures climb to +5C Monday
and then +12-14C Tuesday. These values bring highs in the 60s to
lower 70s on Monday, but diurnal mixing of lower dewpoints (RHs down
to around 30 percent) to go along with breezy southwest winds could
warrant fire weather concerns on Monday. Temperatures on Tuesday are
even warmer with most areas away from the southeast coast well into
the 70s, except SW winds look to be a little lighter and relative
humidities aren't quite as low. Will assess how much rain actually
falls and then consider fire weather partner input before weighing a
decision on fire weather headlines, but they could be possible on
Monday and possibly Tuesday.
KEY MESSAGE 3...Increasing chance for showers and even thunderstorms
mid to late week.
500 mb pattern amplifies by midweek, with a pronounced upper trough
over the nation's midsection and an amplifying ridge associated with
above normal temperatures over the eastern and southeast US into the
western Atlantic. A slow-moving frontal boundary will be progressing
eastward with low pressure developing along it at some point late in
the week - guidance varies on when this happens but loose consensus
around Thursday. Pretty robust dynamics and decent moisture plume
could favor several opportunities for showers and even a few
thunderstorms around late in the week. We do need the rain so this
should be more beneficial than necessarily hazardous, but either
way, expect temperatures to remain slightly above normal but with
chances for rain on the increase. Will have to watch this boundary
for the development of a more significant low pressure by weeks end
but details are unclear at this time.
&&
.AVIATION /06Z SATURDAY THROUGH WEDNESDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
06Z Update
Rest of tonight: Moderate confidence.
VFR for most, though risk for -SHRA and low-end VFR/MVFR
ceilings at BDL and ORH between 06z and 12z. VFR ceilings
outside of any -SHRA activity.
Today: Moderate confidence on the timing and coverage of -SHRA.
OVC low-end VFR/MVFR ceilings with passing -SHRA over interior
CT/western MA advancing east through 17z to BOS. Looking for
SHRA to redevelop across interior Southern New England airports
by afternoon with patchy MVFR ceilings and NW winds around 5-10
kt. Better chance for 4-6 SM -RA and MVFR ceilings comes in
after 21z for BOS, PVD and the Cape airports as coastal low
pressure begins to approach. S winds become SE/ESE Sat afternoon
for eastern airports around 5-10 kt.
Tonight: Moderate confidence.
VFR from ORH westward, but MVFR ceilings and steadier -RA
continues for PVD, BOS, and the Cape airports. Winds come
around to NW around 10 kt Sat night.
KBOS Terminal...High confidence in TAF. Winds to go light late
in the day, around 22-04z, which could allow for a period of
light onshore winds to develop before becoming S around 5 kt.
KBDL Terminal...High confidence in TAF.
Outlook /Sunday Night through Wednesday/...
Sunday Night: VFR.
Monday through Tuesday: VFR. Breezy.
Tuesday Night: VFR. Windy with gusts up to 30 kt. Slight chance
SHRA.
Wednesday: VFR. Windy with gusts up to 30 kt. Chance SHRA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Overall high confidence.
Winds and seas should remain below small craft advisory levels
through today and tonight. Winds increase to 10-15 kt this
afternoon, with seas 4 ft or less all waters. Mainly dry
weather, though rain begins to increase on the southern waters
later tonight into Sunday.
Winds and seas then increase to small craft levels late Sunday
morning as winds turn NW with gusts 20-25 kt and seas building
to 4-6 ft on the outer waters. Rain could also locally reduce
visibility.
Outlook /Sunday Night through Wednesday/...
Sunday Night: Winds less than 25 kt. Local rough seas.
Monday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Seas up to 5 ft.
Monday Night: Winds less than 25 kt. Seas up to 5 ft.
Tuesday: Moderate risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of rough seas.
Tuesday Night: Strong winds with gusts up to 35 kt. Local rough
seas.
Wednesday: Strong winds with gusts up to 35 kt. Seas up to
5 ft. Chance of rain showers.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 11 AM Sunday to 2 PM EDT Monday for
ANZ250-254>256.
&&
$$
DISCUSSION...FT
AVIATION...FT
MARINE...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: 5 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
Friday:
0.00 in
May:
7.50 in
2026
51.1 in
Season Snow:
Daily Extremes [‒] Daily Extremes [+]
12:22am
49.6°F
High today:
2:37am
47.5°F
Low today:
3:36pm
63.9°F
High Friday:
6:26am
45.0°F
Low Friday:
2:37am
47.5°F
Low wind chill today:
8:09am
43.7°F
Low wind chill Friday:
5:36am
42.6°F
High dew pt today:
12:00am
48.7°F
High dew pt Friday:
3:05am
3 mph
Wind gust today:
11:55am
12 mph
Wind gust Friday:
Alerts / Advisories [‒] Alerts / Advisories [+]
No alerts/warnings active for Southeast Middlesex County.
Sun / Moon [‒] Sun / Moon [+]
First Light:
5:07am
Sunrise:
5:38am
Sunset:
7:46pm
Twilight ends:
8:17pm
Daylight length:
14 hours 8 minutes
Phase:
Waning Gibbous (100%)
Moon set:
5:37am
Moon rise:
9:15pm
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