Lexington, Massachusetts, USA
35.1°F
1.7°C
Cold
Overcast
Today: Hi 59 °F
Tonight: Lo 43 °F
Dew Point:
32.4°F
Humidity: 90%
UV Index: 0.0 None
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.01 in
Rain Saturday: 0.00 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sun May 3, 2026 2:33am EDT
- Lingering showers this morning give way to a slow clearing trend this afternoon and tonight.
- Drying trend Monday into Tuesday with warmer temperatures and breezy to gusty southwest winds.
- Cold front brings a chance of showers and thunderstorms late Tuesday, followed by an unsettled and cooler pattern mid to late week.
Slight Chance Rain Showers then Partly Sunny
Hi 59 °F
A slight chance of rain showers before 8am. Partly sunny, with a high near 59. Northwest wind 7 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Mostly Clear
Lo 43 °F
Mostly clear, with a low around 43. West wind 6 to 10 mph.
Sunny
Hi 70 °F
Sunny, with a high near 70. Southwest wind 7 to 14 mph, with gusts as high as 25 mph.
Mostly Clear
Lo 52 °F
Mostly clear, with a low around 52. Southwest wind 8 to 12 mph.
Mostly Sunny
Hi 79 °F
Mostly sunny, with a high near 79. Southwest wind 8 to 14 mph, with gusts as high as 28 mph.
Mostly Cloudy
Lo 59 °F
Mostly cloudy, with a low around 59. Southwest wind around 13 mph, with gusts as high as 26 mph.
Rain Showers Likely
Hi 68 °F
Rain showers likely. Mostly cloudy, with a high near 68. South wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Rain Showers
Lo 50 °F
Rain showers. Mostly cloudy, with a low around 50. Southwest wind 5 to 12 mph. Chance of precipitation is 80%.
Rain Showers Likely
Hi 59 °F
Rain showers likely. Mostly cloudy, with a high near 59. North wind 5 to 8 mph. Chance of precipitation is 60%.
Rain Showers Likely
Lo 43 °F
Rain showers likely. Mostly cloudy, with a low around 43. Northwest wind around 7 mph. Chance of precipitation is 60%.
Slight Chance Rain Showers
Hi 59 °F
A slight chance of rain showers. Mostly sunny, with a high near 59. West wind 8 to 13 mph, with gusts as high as 24 mph.
Slight Chance Rain Showers then Partly Cloudy
Lo 41 °F
A slight chance of rain showers before 8pm. Partly cloudy, with a low around 41. West wind 5 to 10 mph.
Mostly Sunny then Slight Chance Rain Showers
Hi 61 °F
A slight chance of rain showers after 2pm. Mostly sunny, with a high near 61. Southwest wind 5 to 9 mph.
Chance Rain Showers
Lo 44 °F
A chance of rain showers. Mostly cloudy, with a low around 44. Southwest wind 3 to 8 mph.
Issued by:
National Weather Service Boston / Norton, MA
Updated Sun May 3, 2026 2:33am EDT

NW 7 mph
NW 8 mph
NW 9 mph
NW 10 mph
NW 10 mph
NW 10 mph
NW 12 mph
NW 13 mph
NW 13 mph
NW 13 mph
NW 12 mph
NW 12 mph
NW 10 mph
NW 10 mph
W 8 mph
W 8 mph
W 8 mph
W 7 mph
W 7 mph
W 6 mph
W 6 mph
SW 6 mph
SW 6 mph
SW 6 mph
SW 7 mph
SW 8 mph
SW 9 mph
SW 10 mph
SW 12 mph
SW 13 mph
SW 14 mph
SW 14 mph
SW 14 mph
SW 14 mph
SW 14 mph
SW 13 mph
000
FXUS61 KBOX 030731
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
331 AM EDT Sun May 3 2026
.WHAT HAS CHANGED...
The Small Craft Advisory has been extended until 8pm Monday.
&&
.KEY MESSAGES...
- Lingering showers this morning give way to a slow clearing
trend this afternoon and tonight.
- Drying trend Monday into Tuesday with warmer temperatures and
breezy to gusty southwest winds.
- Cold front brings a chance of showers and thunderstorms late
Tuesday, followed by an unsettled and cooler pattern mid to
late week.
&&
.DISCUSSION...
KEY MESSAGE 1... Lingering showers this morning give way to a slow
clearing trend this afternoon and tonight.
Expect a few lingering wrap-around showers mainly across eastern
Massachusetts this morning with continued cyclonic flow. Shower
activity wanes by the mid morning as a layer of drier air filters in
at 925 mb. After a brief period of clearing, lingering cyclonic flow
aloft and low-level instability will help form widespread diurnal CU
and stratus clouds. Temperature-wise, not much change in the mid
levels and we're looking at near persistence if not a few degrees
warmer in valley locations where highs may break into the lower 60s.
Breezy day on tap with model soundings showing a well mixed boundary
layer extending to around 850 millibars paired with a low level
jet that increases to around 25-30 kt.
KEY MESSAGE 2...Turning significantly drier Monday into Tuesday with
warmer temperatures and breezy southwest winds.
The week starts with increasingly zonal flow aloft stemming from the
breakdown of a broad trough over the Eastern CONUS. Further west,
building heights help to develop a Rex block over the Pacific
Northwest serving to re-amplify the upper air pattern. Closer to the
surface, low pressure deepens over the Canadian Maritimes
Monday while high pressure builds to our south over the
southwestern Atlantic resulting in an increasing pressure
gradient. In terms of sensible weather, expect mainly dry
conditions with increasing sunshine and a marked warming trend.
Southwest flow will advect milder air into the region, with
850mb temperatures rising from around +4C to +6C Monday to +12C
to +14C Tuesday. Forecast soundings support a well-mixed
boundary layer, expecting highs in the mid 60s to lower 70s
Monday and upper 70s to low 80s Tuesday. The pressure gradient
tightens through the period, resulting in breezy conditions
Monday with southwest gusts 20-30 mph, increasing to 25-35 mph
Tuesday. One final note, dew points fall into the 20s and 30s
Monday and 30s and 40s Tuesday. These values in combination with
much warmer temperatures will result in relative humidity
values falling to 25-35% Monday afternoon and 30-40% Tuesday
afternoon. This combination will mean fire weather concerns are
possible. Coordination with state fire weather partners is
ongoing, and headlines may be needed early next week.
KEY MESSAGE 3...Cold front brings a chance of showers and
thunderstorms late Tuesday, followed by an unsettled and cooler
pattern mid to late week.
Cold front approaches late Tuesday, though timing remains uncertain.
With highs climbing well above normal, guidance suggests some
instability with up to 1000 J/kg of CAPE, mainly across NW
Mass, which may support scattered convective showers and
thunderstorms. Latest CSU-ML guidance still paints the northern
border of our CWA with low-end (~5%) severe probabilities. This
will need to be monitored give a strengthening low- level jet
in the vicinity. The limiting factor will be moisture with
dewpoints in the lower to mid 50s Tuesday afternoon. The front
may be slow to clear the region, sagging south of southern New
England Wednesday with lingering showers and possible
thunderstorms.
Looking ahead, the pattern becomes more active as mid-level ridge
develops across western CONUS, replacing the Rex blocking, and a
trough across the eastern CONUS. This will support multiple
shortwaves and surface lows moving through the flow, resulting in
periodic chances for showers Thursday into Friday. Timing details
remain uncertain at this range. Late week bears watching, as
guidance suggests a stronger system could impact the region Thursday
night into Friday, accompanied by a robust southerly low-level jet.
This may bring a period of heavier rainfall and gusty winds. While
details remain uncertain this far out, the potential exists for
impactful conditions including hazardous marine weather.
Astronomical tides appear relatively low late week, which should
limit coastal flood potential unless a stronger system materializes.
Behind the front, cooler temperatures return with highs generally in
the upper 50s to lower 60s Wednesday and beyond.
&&
.AVIATION /07Z SUNDAY THROUGH THURSDAY/...
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 on timing.
Continued MVFR to IFR conditions and SHRA across the Cape and
Islands. Cannot rule out a passing shower for KBOS to KPVD, but
chances fall significantly after 12z. Winds come around to NW
5-10 kts, easing across the interior to a light NW less than
5kts.
Today: Moderate confidence in the extent of cloudcover.
VFR and dry for western terminals. Eastern terminals for Sunday
AM is MVFR-IFF, with improvements through the late morning to
VFR, the Cape and island terminals improve by early afternoon.
Will have gusty NW winds 8-12 kts with a gusts to 20-25 kts.
IFR-MVFR, at least for east terminals early this morning For
BOS this is likely a short window of lowered ceilings and
scattered showers. Improving to VFR mid to late morning and
closer to early afternoon for Cape/Island terminals. VFR for
west/central terminals. NW winds 8-12 kts with a few gusts to 20
kts.
Tonight: High confidence. VFR. W wind 5-10 kt
VFR. W winds 5-10 kts become lighter SW through the night.
KBOS Terminal...Moderate to high confidence in TAF. Likely a
short window of lowered ceilings between 10z-15z and scattered
showers. Improvements after 15z to VFR with NW gusts 20-25 kts.
KBDL Terminal...High confidence in TAF.
Outlook /Monday Night through Thursday/...
Monday Night through Tuesday: VFR. Breezy.
Tuesday Night: VFR. Breezy. Slight chance SHRA.
Wednesday: Mainly VFR, with areas MVFR possible. Breezy. Chance
SHRA.
Wednesday Night: Mainly VFR, with local IFR possible. Breezy.
SHRA likely.
Thursday: Mainly MVFR, with local VFR possible. Breezy. SHRA
likely.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Overall high confidence.
NW winds increase this afternoon with some gusts to 25kts
thru Monday evening. Will also see seas build to 4-6 feet across
the outer waters this afternoon thru Monday. Given these
conditions, the Small Craft Advisory goes into effect at 11am
this morning and has been extended until 8pm Monday. Further
extensions to the SCA will likely be needed with future
forecast updates.
Outlook /Monday Night through Thursday/...
Monday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft.
Tuesday: Moderate risk for Small Craft Advisory winds with
gusts up to 30 kt. Local rough seas.
Tuesday Night: Strong winds with gusts up to 30 kt. Areas of
rough seas.
Wednesday: Moderate risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of rough seas. Chance of rain showers.
Wednesday Night: Moderate risk for Small Craft Advisory winds
with gusts up to 30 kt. Local rough seas. Rain showers likely.
Thursday: Winds less than 25 kt. Local rough seas. Rain showers
likely.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 11 AM this morning to 8 PM EDT
Monday for ANZ250-254>256.
&&
$$
DISCUSSION...FT
AVIATION...FT
MARINE...FT
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 5 Medium
Current (Measured): 0.0 None
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:
0.01 in
Rain Today:
0.00 in
Saturday:
0.01 in
May:
1.26 in
2026
1:17pm
36.1°F
High today:
12:00am
25.2°F
Low today:
2:28pm
30.4°F
High Saturday:
7:11am
16.2°F
Low Saturday:
12:00am
25.2°F
Low wind chill today:
7:11am
16.2°F
Low wind chill Saturday:
1:17pm
33.3°F
High dew pt today:
11:56pm
20.7°F
High dew pt Saturday:
None
Wind gust today:
None
Wind gust Saturday:
No alerts/warnings active for Southeast Middlesex County.
First Light:
6:11am
Sunrise:
6:39am
Sunset:
5:19pm
Twilight ends:
5:47pm
Daylight length:
10 hours 39 minutes
Phase:
Waning Gibbous (82%)
Moon set:
8:18am
Moon rise:
9:38pm