Lexington, Massachusetts, USA
35.1°F
1.7°C
Cold
Clear
Today: Hi 90 °F
Tonight: Lo 56 °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 Wednesday: 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 Thu Jun 4, 2026 6:20am EDT
- Quiet and dry stretch of weather through Saturday, with unseasonably warm temperatures.
- Showery activity becomes more likely late Saturday into Sunday with a frontal passage.
- Drier and cooler conditions early next week.
Sunny
Hi 90 °F
Sunny, with a high near 90. Southwest wind 6 to 13 mph.
Mostly Clear
Lo 56 °F
Mostly clear, with a low around 56. West wind 3 to 12 mph.
Mostly Sunny
Hi 90 °F
Mostly sunny, with a high near 90. West wind around 7 mph.
Partly Cloudy
Lo 66 °F
Partly cloudy, with a low around 66. Southwest wind around 6 mph.
Partly Sunny
Hi 90 °F
Partly sunny, with a high near 90. Southwest wind 5 to 12 mph, with gusts as high as 22 mph.
Slight Chance Showers And T-Storms then Chance Showers And T-Storms
Lo 66 °F
A slight chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Southwest wind 6 to 10 mph. Chance of precipitation is 40%.
Showers And T-Storms
Hi 78 °F
A chance of rain showers before 8am, then showers and thunderstorms. Mostly cloudy, with a high near 78. Northwest wind 7 to 10 mph. Chance of precipitation is 80%.
Showers And T-Storms Likely
Lo 54 °F
Showers and thunderstorms likely. Mostly cloudy, with a low around 54. Northeast wind around 9 mph. Chance of precipitation is 70%.
Slight Chance Rain Showers then Mostly Sunny
Hi 69 °F
A slight chance of rain showers before 7am. Mostly sunny, with a high near 69. Northeast wind 8 to 12 mph.
Partly Cloudy
Lo 54 °F
Partly cloudy, with a low around 54. Southeast wind 3 to 8 mph.
Mostly Sunny
Hi 76 °F
Mostly sunny, with a high near 76. Northeast wind 5 to 8 mph.
Partly Cloudy
Lo 58 °F
Partly cloudy, with a low around 58. Southwest wind around 6 mph.
Mostly Sunny
Hi 84 °F
Mostly sunny, with a high near 84. North wind 3 to 7 mph.
Partly Cloudy
Lo 65 °F
Partly cloudy, with a low around 65. Southwest wind around 6 mph.
Issued by:
National Weather Service Boston / Norton, MA
Updated Thu Jun 4, 2026 6:20am EDT

SW 10 mph
SW 13 mph
SW 13 mph
SW 13 mph
SW 13 mph
SW 12 mph
SW 10 mph
SW 9 mph
SW 9 mph
SW 8 mph
SW 7 mph
SW 6 mph
W 6 mph
W 5 mph
W 5 mph
W 3 mph
W 3 mph
W 5 mph
W 6 mph
W 6 mph
W 7 mph
W 7 mph
W 7 mph
W 7 mph
W 6 mph
W 6 mph
W 6 mph
SW 7 mph
SW 7 mph
SW 6 mph
SW 3 mph
W 3 mph
W 3 mph
W 3 mph
SW 3 mph
SW 3 mph
000
FXUS61 KBOX 041050
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
650 AM EDT Thu Jun 4 2026
.WHAT HAS CHANGED...
While no significant changes were made to the forecast, continue
to refine summery temperatures and timing of precipitation for
this coming weekend.
&&
.KEY MESSAGES...
- Quiet and dry stretch of weather through Saturday, with
unseasonably warm temperatures.
- Showery activity becomes more likely late Saturday into Sunday
with a frontal passage.
- Drier and cooler conditions early next week.
&&
.DISCUSSION...
KEY MESSAGE 1...Quiet and dry stretch of weather through Saturday,
with unseasonably warm temperatures.
Confidence remains high in dry and unseasonably warm weather through
the daylight hours Saturday as surface high pressure shifts from the
Great Lakes toward the southeastern CONUS while mid-level ridging
settles across the Northeast. Temperatures aloft continue to warm,
with 850 mb temperatures rising to around +13C to +15C today and
Friday, then +15C to +18C Saturday. Highs today should top out in
the 80s for most, with the greatest potential for 90 degree
temperatures across the Connecticut River and Merrimack Valleys
where downsloping and deeper mixing are maximized. Friday and
Saturday are expected to be the warmest days, with highs in the
upper 80s to lower 90s becoming more widespread away from the
immediate coast, where onshore flow should still provide some
moderation. NBM probabilities continue to indicate a 70 to 80
percent chance of exceeding 90 degrees across the Connecticut River
and Merrimack Valleys Friday afternoon, while much of the coastal
plain away from the shoreline has a 50 to 60 percent chance. One
caveat Saturday will be increasing cloud cover and a low risk for a
late-day shower, mainly northwest of the I-91 corridor.
KEY MESSAGE 2...Showery activity becomes more likely late Saturday
into Sunday with a frontal passage.
Confidence continues to increase that most, if not all, of the
daylight hours Saturday remain dry, though a brief afternoon shower
cannot be ruled out northwest of the I-91 corridor as a front
approaches from northern New England. Given summerlike warmth and
modest humidity (dewpoints near 60F), a limited risk for an isolated
thunderstorm with locally heavy downpours exists Saturday afternoon,
though confidence remains low and any activity should remain
isolated.
By Sunday, a more defined mid-level trough and associated shortwave
energy become established over southern New England, supporting a
better signal for scattered showers as weak surface low pressure
develops along a weakening frontal boundary. Temperatures trend
notably cooler, generally 10 to 15 degrees lower than Saturday,
though exact values will depend on frontal timing. Eastern areas may
cool more quickly with northeasterly flow off the Gulf of Maine,
while interior locations such as Springfield and Hartford could
remain relatively warmer.
KEY MESSAGE 3...Drier and cooler conditions early next week.
Conditions trend drier Monday into Tuesday as the weekend system
gradually shifts east of New England. Some uncertainty remains
regarding how quickly lingering troughing departs, which will
influence temperatures and cloud cover early next week. For now,
expect cooler conditions Monday with a gradual warming and drying
trend by Tuesday.
&&
.AVIATION /12Z THURSDAY THROUGH MONDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
12z TAF Update...
Today through Friday...High confidence.
VFR conditions continue through Friday. A brief sea breeze along
the eastern MA coast can not be ruled out for a few hours around
midday...But a better chance exists Friday. Otherwise...SW winds
may gust on the order of 15-20+ knots this afternoon and 20-25
knots towards the south coast and Cape.
KBOS...High confidence in TAF. Only uncertainty remains
if a brief sea breeze occurs later this morning into early
afternoon before SW gradient strengthens enough. Friday will
have a greater risk for a sea breeze.
KBDL...High confidence in TAF.
Outlook /Friday Night through Monday/...
Friday Night: VFR.
Saturday: VFR. Breezy. Slight chance SHRA, slight chance TSRA.
Saturday Night: VFR. Breezy. Chance SHRA, slight chance TSRA.
Sunday: Mainly VFR, with areas MVFR possible. Breezy. SHRA
likely, chance TSRA.
Sunday Night: Mainly VFR, with local IFR possible. Breezy.
Chance SHRA, patchy BR.
Monday: Mainly VFR, with local MVFR possible. Breezy. Slight
chance SHRA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Today through Friday...High confidence.
Winds and seas remain below SCA criteria through Friday. SW winds
increase to around 15-20 kt today, with occasional marginal SCA-
level gusts near 25 kt across the Cape and Islands waters, including
Buzzards Bay, Vineyard Sound, and Nantucket Sound, where stronger SW
flow is favored through sunset. A similar setup may develop again
Friday, though confidence is too low at this time to warrant an
additional Small Craft Advisory. Seas remain 3 ft or less on all
waters.
Outlook /Friday Night through Monday/...
Friday Night: Winds less than 25 kt. Areas of seas approaching
5 ft.
Saturday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Seas up to 5 ft.
Saturday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft. Chance of rain showers,
slight chance of thunderstorms, patchy fog.
Sunday: Winds less than 25 kt. Local rough seas. Rain showers
likely, slight chance of thunderstorms, patchy fog.
Sunday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft. Chance of rain showers,
patchy fog.
Monday: Moderate risk for Small Craft Advisory winds with gusts
up to 30 kt. Seas up to 5 ft. Slight chance of rain showers.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from noon today to 9 PM EDT this evening
for ANZ232>234.
&&
$$
DISCUSSION...Dooley
AVIATION...Frank
MARINE...Dooley
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 8 Very 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
Wednesday:
0.01 in
June:
1.26 in
2026
1:17pm
36.1°F
High today:
12:00am
25.2°F
Low today:
2:28pm
30.4°F
High Wednesday:
7:11am
16.2°F
Low Wednesday:
12:00am
25.2°F
Low wind chill today:
7:11am
16.2°F
Low wind chill Wednesday:
1:17pm
33.3°F
High dew pt today:
11:56pm
20.7°F
High dew pt Wednesday:
None
Wind gust today:
None
Wind gust Wednesday:
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