Lexington, Massachusetts, USA
35.1°F
1.7°C
Cold
Clear
Overnight: Lo 59 °F
Saturday: Hi 79 °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 Friday: 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 Sat Aug 29, 2026 12:05am EDT
- Mainly dry this afternoon, though a rogue shower or thunderstorm remains possible through sunset.
- A fall-like feel with seasonable temperatures and very low humidity Saturday, becoming more summer-like Sunday. The weekend remains dry, with increasing clouds late Sunday.
- Cloudy and unsettled early to mid next week with several opportunities for showers and storms. While Monday now looks cloudy but generally dry, better chances for showers and storms are anticipated for Tue through Thurs.
Mostly Clear
Lo 59 °F
Mostly clear, with a low around 59. Northwest wind around 7 mph.
Sunny
Hi 79 °F
Sunny, with a high near 79. Northwest wind around 6 mph.
Partly Cloudy
Lo 60 °F
Partly cloudy, with a low around 60. Southwest wind around 5 mph.
Partly Sunny
Hi 83 °F
Partly sunny, with a high near 83. Southwest wind 5 to 10 mph.
Mostly Cloudy
Lo 65 °F
Mostly cloudy, with a low around 65. West wind 5 to 8 mph.
Mostly Sunny
Hi 79 °F
Mostly sunny, with a high near 79. Northeast wind around 7 mph.
Partly Cloudy
Lo 61 °F
Partly cloudy, with a low around 61. South wind 2 to 6 mph.
Chance Rain Showers
Hi 75 °F
A chance of rain showers between 8am and 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 75. Southeast wind 2 to 7 mph. Chance of precipitation is 50%.
Chance Showers And T-Storms
Lo 62 °F
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Southeast wind 3 to 7 mph. Chance of precipitation is 50%.
Showers And T-Storms Likely
Hi 75 °F
A chance of rain showers before 2pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 75. South wind around 7 mph. Chance of precipitation is 70%.
Showers And T-Storms Likely
Lo 64 °F
Showers and thunderstorms likely. Mostly cloudy, with a low around 64. South wind around 6 mph. Chance of precipitation is 70%.
Chance Rain Showers
Hi 78 °F
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 78. Southwest wind around 8 mph. Chance of precipitation is 40%.
Chance Showers And T-Storms
Lo 62 °F
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 62. West wind around 7 mph. Chance of precipitation is 40%.
Partly Sunny then Slight Chance Rain Showers
Hi 76 °F
A slight chance of rain showers after 2pm. Partly sunny, with a high near 76. Northwest wind around 8 mph.
Issued by:
National Weather Service Boston / Norton, MA
Updated Fri Aug 28, 2026 2:11pm EDT

N 7 mph
N 7 mph
N 7 mph
N 7 mph
NW 7 mph
NW 7 mph
NW 6 mph
NW 6 mph
N 6 mph
N 6 mph
N 6 mph
N 5 mph
NW 5 mph
NW 3 mph
W 3 mph
W 3 mph
W 3 mph
SW 3 mph
SW 3 mph
S 3 mph
S 3 mph
W 3 mph
SW 3 mph
SW 3 mph
W 3 mph
W 3 mph
W 3 mph
SW 3 mph
SW 5 mph
SW 5 mph
SW 5 mph
SW 5 mph
SW 6 mph
SW 6 mph
SW 7 mph
SW 8 mph
000
FXUS61 KBOX 282344
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
744 PM EDT Fri Aug 28 2026
.WHAT HAS CHANGED...
No significant changes.
&&
.KEY MESSAGES...
- Mainly dry this afternoon, though a rogue shower or
thunderstorm remains possible through sunset.
- A fall-like feel with seasonable temperatures and very low
humidity Saturday, becoming more summer-like Sunday. The
weekend remains dry, with increasing clouds late Sunday.
- Cloudy and unsettled early to mid next week with several
opportunities for showers and storms. While Monday now looks
cloudy but generally dry, better chances for showers and
storms are anticipated for Tue through Thurs.
&&
.DISCUSSION...
KEY MESSAGE 1...Mainly dry this afternoon, though a rogue shower or
thunderstorm remains possible through sunset.
Seasonably warm and muggy this afternoon, though many locations will
remain dry. Earlier cloud cover resulted in lower CAPE values and,
in some instances, a weak cap along and east of I-95. However, that
cap is eroding, with isolated showers and garden-variety
thunderstorms developing. With the approach of a cold front this
afternoon, a rogue pop-up shower or thunderstorm remains possible;
however, coverage should be sparse.
Storms should remain sub-severe, though sufficient DCAPE of 800-1000
J/kg exists mainly west of I-495 in MA and across northern and
central CT. Any storms that develop in these areas could produce
gusty straight-line winds. The best timing for storms is between 2
and 8 PM. With the loss of daytime heating, any storms that develop
will quickly diminish. That being said, there is nothing worth
canceling outdoor plans over.
KEY MESSAGE 2...A fall-like feel with seasonable temperatures and
very low humidity Saturday, becoming more summer-like Sunday. The
weekend remains dry, with increasing clouds late Sunday.
A post-cold-frontal air mass arrives overnight, ushering in
refreshing conditions and setting the stage for a nice weekend. High
pressure moves in from the northwest, leading to dry weather both
Saturday and Sunday.
Dew points Saturday will be fall-like, mainly in the 50s. However,
the lower humidity will be short-lived, as southwest flow returns
Sunday and brings dew points back into the middle and upper 60s.
Otherwise, temperatures will be seasonable Saturday, with highs in
the upper 70s to around 80 degrees, then slightly warmer Sunday,
with highs in the lower to middle 80s.
As mentioned, Sunday remains dry, though clouds increase during the
afternoon ahead of the next chance for rain. A few cool nights are
also expected, allowing for a break from the air conditioning.
Temperatures fall into the 50s overnight into Saturday morning and
again Saturday night into Sunday morning, though urban centers
remain in the lower 60s.
Additionally, there is a moderate risk for rip currents Saturday.
Those heading to the beach should check with beach staff or
lifeguards regarding rip current conditions before entering the
water.
KEY MESSAGE 3...Cloudy and unsettled early to mid next week
with several opportunities for showers and storms. While Monday
now looks cloudy but generally dry, better chances for showers
and storms are anticipated for Tue through Thurs.
Still looks unsettled during the early to middle part of the
workweek. A backdoor cool front looks to build westward through
Southern New England on Mon with generally dry but cloudy weather,
then remain to our southwest Tue and Wed. Periods of showers and
storms now seem more favored around Tue and Wed versus Mon. Thurs
may offer a better shot at widespread showers and storms regionally,
as a cold front looks to progress the stalled frontal boundary
southward. Expect a narrower range in high/low temps Mon through
Wed, with highs running a little cooler than normal and lows
slightly milder than normal.
&&
.AVIATION /00Z SATURDAY THROUGH WEDNESDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
00Z TAF Update:
Tonight: High confidence.
VFR. WNW winds under 10 kt shift to northerly and increase to
around 10 kt with occasional sub-20 kt gusts overnight, then
trending northerly under 10 kt by daybreak.
Saturday and Saturday Night...High confidence.
VFR. NW winds 5 to 8 kt, with a sea breeze possible across eastern
MA during the day. Winds shift to the SW overnight, with speeds less
than 5 kt.
KBOS Terminal...High confidence.
KBDL Terminal...High confidence.
Outlook /Saturday Night through Wednesday/...
Sunday: VFR. Breezy.
Sunday Night: VFR. Breezy. Chance SHRA.
Monday: VFR.
Monday Night: VFR. Slight chance SHRA.
Tuesday: VFR. Chance SHRA, slight chance TSRA.
Tuesday Night: VFR. SHRA likely, slight chance TSRA.
Wednesday: Mainly VFR, with local IFR possible. Breezy. Chance
SHRA, slight chance TSRA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Sunday...High confidence.
A cold front clears the coast tonight, with winds shifting from SW
to N by Saturday. However, winds over the waters off the eastern MA
coast remain E due to a localized sea breeze. In general, ideal
boating conditions are expected Saturday.
Winds shift to SSW by Sunday, with gusts of 20 to 25 kt, especially
in areas prone to funneling, such as Vineyard Sound and Buzzards
Bay. Seas during this period will generally range from 2 to 4 ft,
with the highest waves over the outer waters.
Outlook /Saturday Night through Wednesday/...
Sunday: Winds less than 25 kt.
Sunday Night: Winds less than 25 kt. Seas locally approaching
5 ft. Chance of rain showers.
Monday through Monday Night: Winds less than 25 kt.
Tuesday: Winds less than 25 kt. Seas locally approaching 5 ft.
Slight chance of rain showers.
Tuesday Night: Winds less than 25 kt. Areas of seas approaching
5 ft. Chance of rain showers, slight chance of thunderstorms.
Wednesday: Winds less than 25 kt. Areas of seas approaching
5 ft. Chance of rain showers.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.
&&
$$
DISCUSSION...Loconto/Dooley
AVIATION...Loconto/Dooley
MARINE...Loconto/Dooley
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 7 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
Friday:
0.01 in
August:
1.26 in
2026
1:17pm
36.1°F
High today:
12:00am
25.2°F
Low today:
2:28pm
30.4°F
High Friday:
7:11am
16.2°F
Low Friday:
12:00am
25.2°F
Low wind chill today:
7:11am
16.2°F
Low wind chill Friday:
1:17pm
33.3°F
High dew pt today:
11:56pm
20.7°F
High dew pt Friday:
None
Wind gust today:
None
Wind gust Friday:
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