Lexington, Massachusetts, USA
35.1°F
1.7°C
Cold
Clear
Today: Hi 83 °F
Tonight: Lo 58 °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 Monday: 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 Tue May 5, 2026 6:22am EDT
- A warm and rather windy Tuesday is on tap, with the exception of areas along the immediate south coast of RI and MA where onshore flow off the cooler ocean will limit temperatures.
- Cold front brings the wettest period of the week Wednesday afternoon into Thursday with scattered showers, a few embedded thunderstorms, and a turn to cooler temperatures.
- Late week into the weekend trends cooler, Friday is looking drier but increasing uncertainty for Saturday/Sunday.
Sunny
Hi 83 °F
Sunny, with a high near 83. Southwest wind 10 to 24 mph, with gusts as high as 47 mph.
Mostly Cloudy
Lo 58 °F
Mostly cloudy, with a low around 58. Southwest wind 14 to 23 mph, with gusts as high as 40 mph.
Light Rain Likely
Hi 71 °F
Rain likely after 11am. Cloudy, with a high near 71. Southwest wind 12 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
Rain
Lo 51 °F
Rain before 10pm, then rain and patchy fog. Cloudy, with a low around 51. Southwest wind 7 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Chance Light Rain then Chance Rain Showers
Hi 66 °F
A chance of rain before 8am, then a chance of rain showers. Partly sunny, with a high near 66. Northwest wind around 7 mph. Chance of precipitation is 30%.
Slight Chance Rain Showers then Partly Cloudy
Lo 45 °F
A slight chance of rain showers before 9pm. Partly cloudy, with a low around 45. West wind around 7 mph. Chance of precipitation is 20%.
Sunny
Hi 63 °F
Sunny, with a high near 63. West wind 7 to 10 mph, with gusts as high as 21 mph.
Partly Cloudy
Lo 45 °F
Partly cloudy, with a low around 45. West wind 5 to 9 mph.
Partly Sunny then Chance Rain Showers
Hi 65 °F
A chance of rain showers after noon. Partly sunny, with a high near 65. Southwest wind 5 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Chance Rain Showers
Lo 48 °F
A chance of rain showers. Mostly cloudy, with a low around 48. Southwest wind 6 to 10 mph. Chance of precipitation is 30%.
Slight Chance Rain Showers
Hi 71 °F
A slight chance of rain showers. Mostly sunny, with a high near 71. West wind 6 to 10 mph.
Chance Rain Showers
Lo 53 °F
A chance of rain showers. Mostly cloudy, with a low around 53. Southwest wind 5 to 9 mph. Chance of precipitation is 30%.
Chance Rain Showers
Hi 67 °F
A chance of rain showers. Mostly cloudy, with a high near 67. Southwest wind 6 to 9 mph. Chance of precipitation is 50%.
Chance Rain Showers
Lo 48 °F
A chance of rain showers. Mostly cloudy, with a low around 48. West wind around 7 mph.
Issued by:
National Weather Service Boston / Norton, MA
Updated Tue May 5, 2026 6:22am EDT

SW 12 mph
SW 14 mph
SW 15 mph
SW 16 mph
SW 17 mph
SW 18 mph
SW 20 mph
SW 21 mph
SW 22 mph
SW 23 mph
SW 24 mph
SW 23 mph
SW 22 mph
SW 22 mph
SW 21 mph
SW 18 mph
SW 17 mph
SW 16 mph
SW 16 mph
SW 15 mph
SW 15 mph
SW 14 mph
SW 14 mph
SW 14 mph
SW 15 mph
SW 15 mph
SW 12 mph
SW 12 mph
S 13 mph
S 13 mph
S 14 mph
S 14 mph
S 14 mph
S 14 mph
S 14 mph
S 13 mph
000
FXUS61 KBOX 050637
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
237 AM EDT Tue May 5 2026
.WHAT HAS CHANGED...
No significant changes were made to the forecast during this update.
&&
.KEY MESSAGES...
- A warm and rather windy Tuesday is on tap, with the exception
of areas along the immediate south coast of RI and MA where
onshore flow off the cooler ocean will limit temperatures.
- Cold front brings the wettest period of the week Wednesday
afternoon into Thursday with scattered showers, a few embedded
thunderstorms, and a turn to cooler temperatures.
- Late week into the weekend trends cooler, Friday is looking
drier but increasing uncertainty for Saturday/Sunday.
&&
.DISCUSSION...
KEY MESSAGE 1... A warm and rather windy Tuesday is on tap, with the
exception of areas along the immediate south coast of RI and MA
where onshore flow off the cooler ocean will limit temperatures.
Overall, the synoptic setup remains largely unchanged, with high
pressure offshore and a slow-moving cold front approaching from the
west. This configuration supports a tightening pressure gradient and
a period of strong southwest winds.
A robust 925mb low-level jet of 35-45 kt is expected along and east
of I-95 from Boston to Providence. BUFKIT soundings indicate a
shallow inversion early in the day, which should erode with daytime
heating and allow stronger winds to mix toward the surface. That
said, southwest wind events are typically more uncertain that
northwest flow event, so some uncertainty remains regarding the
extent to which 40-45 kt winds aloft will mix down. Those winds come
most likely between 3-7 PM. Notably, the strongest core of the low-
level jet increases to 50-65 kt shortly after sunset. However, as
boundary layer decoupling increases with the loss of daytime
heating, redevelopment of a nocturnal inversion should limit the
ability of these stronger winds to reach the surface. A Wind
Advisory remains in effect for southern RI and most of eastern MA
from noon through 10 PM.
In addition to the wind threat, it will be quiet warm for early May.
Southwest flow will advect anomalously warm air into the region, with
925mb temperatures peaking between +17C and +20C. This supports
highs in the upper 70s to lower 80s, well above normal, though still
well below daily record values in the lower 90s.
Given ongoing dry conditions combined with gusty winds and minimum
RH values dropping to around 30-35 percent, there is an elevated
fire weather concern. Coordination with state partners has led to
issuance of a Special Weather Statement for much of southern New
England.
Precipitation chances remain minimal today. A slow-moving cold front
approaching from the west may trigger an isolated shower or
thunderstorm, primarily across far northwest MA. The better
convective potential remains well to our north across northern New
York and northern New England.
KEY MESSAGE 2...Cold front brings the wettest period of the week
Wednesday afternoon into Thursday with scattered showers, a few
embedded thunderstorms, and a turn to cooler temperatures.
A slow-moving cold front moves across southern New England starting
late Wednesday afternoon as it approaches western New England and
should exit the coastal waters by Thursday morning. This will likely
be the wettest stretch of the week as a plume of higher PWATs, with
values ~1.3" (1.5-2 standard deviations above normal) advect into the
region with modest 850mb shortwave energy. Temperatures are going to
be noticeably cooler, in the upper 60s to lower 70s. With the high
PWATs, dew points are 53-57F, should support 100-200 units of CAPE
and should promote embedded thunder. The front moves offshore and
while previous model runs have indicated a secondary surface low
moving near or south of the coastal waters, tonight's runs do not
favor this outcome. A shift of winds occur Thursday to the northwest
and this will lead to PWATs falling below 0.3". Feeling a bit more
confident in drier conditions into Thursday afternoon, though it
will be seasonable in the mid 60s.
KEY MESSAGE 3...Late week into the weekend trends cooler, Friday is
looking drier but increasing uncertainty for Saturday/Sunday.
Late week into the weekend will be a noticeable change from the warm
start to the week, with cooler temperatures settling in. Highs
generally run slightly below normal for early to mid-May, mainly in
the lower 60s, though temperatures may approach the 70 degree mark
by Mother's Day (do not forget kiddos).
Friday currently looks drier as the system departs, but uncertainty
increases heading into the weekend. Guidance continues to suggest
another area of low pressure may approach sometime Saturday, though
timing and evolution remain low confidence at this range. Whether
conditions improve in time for Sunday is still uncertain and will be
monitored in subsequent forecasts.
&&
.AVIATION /06Z TUESDAY THROUGH SATURDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
06z TAF Update:
Today...High confidence.
VFR. Persistent SW winds, morning wind speeds are 10-14 kt, becoming
gusty, 25-30 kt between 14-16z, strongest gusts after 18z approach
40-45 kt along the BOS to PVD corridor. A low chance (less than 20%)
of a pop-up shower/thunderstorm for terminals across NW MA after
21z.
Tonight...High confidence in trends, moderate confidence in timing.
Mainly VFR. SW gusts diminish, lowering to 20-25 kt. Areas of patchy
fog and MVFR stratus developing along the south coast after 00z may
expand into SE MA, RI, and E CT by 09z.
Wednesday...Moderate confidence.
Low-end VFR to MVFR. SHRA arriving from W to E between 18-00z. Wind
out of the S 12-18 kt and gusts 25-30 kt.
KBOS Terminal...High confidence.
Strong SW gust nearing 30 kt by 16z and 40 kt after 18z, there is a
low chance gust could reach 45 kt.
KBDL Terminal...High confidence.
Outlook /Wednesday Night through Saturday/...
Wednesday Night: Mainly VFR, with local IFR possible. Breezy.
Chance SHRA.
Thursday: VFR. Chance SHRA.
Thursday Night: VFR.
Friday: VFR. Breezy.
Friday Night: VFR.
Saturday: Mainly VFR, with local MVFR possible. Breezy. Chance
SHRA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Today through Wednesday...High confidence.
After a brief lull, another round of near shore SW Gales are on tap
for this afternoon and evening with strong small crafts persisting
across the outer-waters. Agitated seas 5-9 ft across the souther
waters and 3-7 ft for the eastern waters Tuesday night, with areas
of low stratus and fog develop across the southern waters. SW wind
becomes S overnight, 25-30 kt, areas under a Gale Warning will need
to be converted to a Small Craft Advisory, which could linger into
the day on Wednesday. Wednesday features unsettled conditions with
showers and embedded thunderstorms during the afternoon.
Outlook /Wednesday Night through Saturday/...
Wednesday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of rough seas. Rain showers, slight
chance of thunderstorms.
Thursday: Winds less than 25 kt. Local rough seas. Chance of
rain showers.
Thursday Night: Winds less than 25 kt. Areas of seas
approaching 5 ft. Slight chance of rain showers.
Friday through Friday Night: Winds less than 25 kt. Areas of
seas approaching 5 ft.
Saturday: Winds less than 25 kt. Areas of seas approaching
5 ft. Slight chance of rain showers.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...Wind Advisory from noon today to 10 PM EDT this evening for
MAZ005>007-013>022.
RI...Wind Advisory from noon today to 10 PM EDT this evening for
RIZ002>007.
MARINE...Gale Warning from 11 AM this morning to 11 PM EDT this evening
for ANZ230>237-251.
Small Craft Advisory until 8 PM EDT Wednesday for ANZ250-
254>256.
&&
$$
Dooley
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 6 High
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
Monday:
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 Monday:
7:11am
16.2°F
Low Monday:
12:00am
25.2°F
Low wind chill today:
7:11am
16.2°F
Low wind chill Monday:
1:17pm
33.3°F
High dew pt today:
11:56pm
20.7°F
High dew pt Monday:
None
Wind gust today:
None
Wind gust Monday:
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