Lexington Weather

Current Conditions [‒] Current Conditions [+]

63.7°F Colder than last hour.

17.6°C

Comfortable

Clear

Overnight: Lo 61 °F

Sunday: Hi 84 °F

Dew Point: 53.8°F

Humidity: 70% Increased 3.0% since last hour.

Barometer: 30.10 in S

1019 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Saturday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Overnight, Sunday, & Sunday Night through Saturday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sat Aug 29, 2026 10:57pm EDT

Overview:

- More summer-like conditions return tomorrow. Rain chances return late Sunday.

- Backdoor cold frontal boundary Monday brings onshore flow, decreased cloud cover and cooling afternoon temperatures.

- Unsettled Tuesday through Thursday with several opportunities for showers and thunderstorms, with a chance for some to become strong in western MA and CT. Timing which days may have better storm chances is still uncertain.

Overnight:

Partly Cloudy

Lo 61 °F

Partly cloudy, with a low around 61. Southwest wind around 6 mph.

Sunday:

Mostly Sunny

Hi 84 °F

Mostly sunny, with a high near 84. Southwest wind 6 to 12 mph.

Sunday Night:

Slight Chance Rain Showers then Mostly Cloudy

Lo 63 °F

A slight chance of rain showers between 8pm and 10pm. Mostly cloudy, with a low around 63. West wind 3 to 10 mph. Chance of precipitation is 20%.

Monday:

Sunny

Hi 77 °F

Sunny, with a high near 77. Northeast wind around 6 mph.

Monday Night:

Partly Cloudy then Chance Rain Showers

Lo 63 °F

A chance of rain showers after 2am. Partly cloudy, with a low around 63. South wind 2 to 6 mph. Chance of precipitation is 30%.

Tuesday:

Showers And T-Storms Likely

Hi 76 °F

Tuesday: Showers And Thunderstorms Likely

A chance of rain showers before 8am, then showers and thunderstorms likely. Mostly cloudy, with a high near 76. Southeast wind 2 to 7 mph. Chance of precipitation is 70%.

Tuesday Night:

Showers And T-Storms Likely

Lo 63 °F

Tuesday Night: Showers And Thunderstorms Likely

Showers and thunderstorms likely. Mostly cloudy, with a low around 63. East wind around 6 mph. Chance of precipitation is 70%.

Wednesday:

Chance Rain Showers

Hi 76 °F

A chance of rain showers. Mostly cloudy, with a high near 76. East wind 3 to 7 mph. Chance of precipitation is 40%.

Wednesday Night:

Showers And T-Storms Likely

Lo 65 °F

Wednesday Night: Showers And Thunderstorms Likely

A chance of rain showers before 8pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 65. Southeast wind around 6 mph. Chance of precipitation is 60%.

Thursday:

Chance Rain Showers

Hi 79 °F

A chance of rain showers. Mostly cloudy, with a high near 79. Southeast wind 5 to 8 mph. Chance of precipitation is 50%.

Thursday Night:

Chance Rain Showers

Lo 62 °F

A chance of rain showers. Mostly cloudy, with a low around 62. Northeast wind around 7 mph. Chance of precipitation is 50%.

Friday:

Chance Rain Showers

Hi 75 °F

A chance of rain showers. Partly sunny, with a high near 75. North wind around 8 mph. Chance of precipitation is 30%.

Friday Night:

Chance Rain Showers

Lo 60 °F

A chance of rain showers before 2am. Mostly cloudy, with a low around 60. North wind around 6 mph. Chance of precipitation is 30%.

Saturday:

Mostly Sunny then Slight Chance Rain Showers

Hi 75 °F

A slight chance of rain showers after 5pm. Mostly sunny, with a high near 75. North wind 5 to 8 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 12am through Mon 11am

Issued by:
National Weather Service Boston / Norton, MA
Updated Sat Aug 29, 2026 10:57pm EDT

12:00am

Mostly Clear

63°F
Dew Pt 52°F
Wind from W

W 5 mph
Precip: 0%

1:00am

Partly Cloudy

62°F
Dew Pt 52°F
Wind from W

W 5 mph
Precip: 0%

2:00am

Mostly Cloudy

62°F
Dew Pt 52°F
Wind from SW

SW 5 mph
Precip: 0%

3:00am

Partly Cloudy

61°F
Dew Pt 52°F
Wind from SW

SW 5 mph
Precip: 0%

4:00am

Partly Cloudy

61°F
Dew Pt 52°F
Wind from SW

SW 5 mph
Precip: 0%

5:00am

Partly Cloudy

61°F
Dew Pt 52°F
Wind from SW

SW 6 mph
Precip: 0%

6:00am

Mostly Sunny

61°F
Dew Pt 52°F
Wind from SW

SW 6 mph
Precip: 0%

7:00am

Mostly Sunny

62°F
Dew Pt 53°F
Wind from SW

SW 6 mph
Precip: 0%

8:00am

Mostly Sunny

66°F
Dew Pt 55°F
Wind from SW

SW 6 mph
Precip: 1%

9:00am

Mostly Sunny

70°F
Dew Pt 56°F
Wind from SW

SW 7 mph
Precip: 1%

10:00am

Mostly Sunny

74°F
Dew Pt 56°F
Wind from SW

SW 8 mph
Precip: 1%

11:00am

Mostly Sunny

78°F
Dew Pt 56°F
Wind from SW

SW 9 mph
Precip: 1%

12:00pm

Mostly Sunny

80°F
Dew Pt 56°F
Wind from W

W 10 mph
Precip: 1%

1:00pm

Mostly Sunny

82°F
Dew Pt 56°F
Wind from W

W 12 mph
Precip: 1%

2:00pm

Mostly Sunny

82°F
Dew Pt 56°F
Wind from W

W 12 mph
Precip: 2%

3:00pm

Partly Sunny

82°F
Dew Pt 57°F
Wind from W

W 12 mph
Precip: 3%

4:00pm

Partly Sunny

83°F
Dew Pt 58°F
Wind from W

W 12 mph
Precip: 4%

5:00pm

Mostly Cloudy

81°F
Dew Pt 60°F
Heat Index: 82°F
Wind from SW

SW 12 mph
Precip: 5%

6:00pm

Mostly Cloudy

80°F
Dew Pt 60°F
Heat Index: 81°F
Wind from SW

SW 10 mph
Precip: 7%

7:00pm

Mostly Cloudy

78°F
Dew Pt 61°F
Wind from SW

SW 9 mph
Precip: 10%

8:00pm

Slight Chance Rain Showers

75°F
Dew Pt 62°F
Wind from SW

SW 6 mph
Precip: 20%

9:00pm

Slight Chance Rain Showers

72°F
Dew Pt 62°F
Wind from SW

SW 6 mph
Precip: 19%

10:00pm

Mostly Cloudy

70°F
Dew Pt 63°F
Wind from W

W 6 mph
Precip: 12%

11:00pm

Mostly Cloudy

69°F
Dew Pt 63°F
Wind from W

W 5 mph
Precip: 8%

Mon
12:00am

Mostly Cloudy

69°F
Dew Pt 63°F
Wind from W

W 5 mph
Precip: 6%

Mon
1:00am

Mostly Cloudy

68°F
Dew Pt 62°F
Wind from W

W 5 mph
Precip: 6%

Mon
2:00am

Mostly Cloudy

67°F
Dew Pt 62°F
Wind from W

W 5 mph
Precip: 6%

Mon
3:00am

Mostly Cloudy

66°F
Dew Pt 61°F
Wind from W

W 3 mph
Precip: 1%

Mon
4:00am

Mostly Cloudy

65°F
Dew Pt 61°F
Wind from NW

NW 3 mph
Precip: 0%

Mon
5:00am

Partly Cloudy

64°F
Dew Pt 61°F
Wind from NW

NW 3 mph
Precip: 0%

Mon
6:00am

Mostly Sunny

63°F
Dew Pt 61°F
Wind from NW

NW 3 mph
Precip: 0%

Mon
7:00am

Mostly Sunny

64°F
Dew Pt 60°F
Wind from N

N 3 mph
Precip: 0%

Mon
8:00am

Mostly Sunny

66°F
Dew Pt 60°F
Wind from N

N 5 mph
Precip: 4%

Mon
9:00am

Mostly Sunny

68°F
Dew Pt 59°F
Wind from N

N 5 mph
Precip: 4%

Mon
10:00am

Mostly Sunny

72°F
Dew Pt 59°F
Wind from NE

NE 5 mph
Precip: 4%

Mon
11:00am

Sunny

75°F
Dew Pt 58°F
Wind from NE

NE 5 mph
Precip: 4%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 300025
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
825 PM EDT Sat Aug 29 2026

.WHAT HAS CHANGED...
No significant changes.

&&

.KEY MESSAGES...

- More summer-like conditions return tomorrow. Rain chances
  return late Sunday.

- Backdoor cold frontal boundary Monday brings onshore flow, 
  decreased cloud cover and cooling afternoon temperatures.

- Unsettled Tuesday through Thursday with several opportunities 
  for showers and thunderstorms, with a chance for some to 
  become strong in western MA and CT. Timing which days may have
  better storm chances is still uncertain.

&&

.DISCUSSION...
KEY MESSAGE 1...More summer-like conditions return tomorrow. 
Rain chances return late Sunday.

Dry and sunny conditions with some diurnal cu continue through the 
rest of today. Dew points remain in the 40s and 50s across the 
region through tonight as well with lows in the 50s and low 60s. 925 
mb temperatures remain generally around 15C as well before 
increasing slightly to around 18-20C tomorrow with high pressure 
starting to shift more to the east and SW winds kicking in. Highs 
tomorrow return to the low to mid 80s along with slightly increased 
humidity.

Latest guidance continued to indicated a weak low pressure moving 
close to the region, emphasizing chance for rain generally south of 
I-90 Sunday night. It's worth noting, though, that showers do remain 
possible across all of southern New England starting in the late 
evening hours. There's a low chance for some embedded thunder, but 
that is generally relegated to the south coast and the southern 
waters. Not anticipating much of a washout with these. Higher 
confidence that showery conditions continue overnight Sunday towards 
the south coast, clearing out heading into Monday morning. 

KEY MESSAGE 2...Backdoor cold frontal boundary Monday brings 
onshore flow, decreased cloud cover and cooling afternoon 
temperatures. 

Monday looks to be the least-active of the upcoming workweek, but it 
still features a backdoor cool front slipping SW from coastal NH/ME 
early in the day, then continuing on SW and tending to stall 
somewhere near southwest CT or southern NY late in the day. 
Considerable cloudiness to start then gives way to increasing NE 
winds, decreased cloud cover and temps either hovering or slowly 
cooling off. Though temps should reach the low 80s in western MA/CT, 
midday highs in the mid/upper 70s eastern MA and RI then cool off to 
the low/mid 70s by sundown. Cloud cover then increases Mon night but 
should still end up dry for the most part, though rain chances 
increase into the pre-dawn hours. 

KEY MESSAGE 3...Unsettled Tuesday through Thursday with several
opportunities for showers and thunderstorms, with a chance for 
some to become strong in western MA and CT. Timing which days 
may have better storm chances is still uncertain. 

Tue through Thurs look more active/unsettled, as the backdoor 
frontal boundary stalls from SW to NE through NY State and the 
northeast fringe of a substantial heat ridge centered over the Ohio 
Valley by Tue tries to build into the northern mid-Atlantic and 
perhaps into a small portion of Southern New England. This places 
Southern New England between a more stable and seasonable airmass to 
the northeast and a warm/hot, humid and conditionally unstable 
airmass to our southwest. Above the stalled sfc boundary lies a belt 
of strong NW flow aloft (e.g. 300 mb winds approaching 100 kt), 
which tends to favor shortwave energy impulses moving SE along the 
stalled front. Several opportunities for showers and thunderstorms 
seem likely in this period, but the details of which are uncertain. 
Those hinge on the exact placement/evolution of the frontal 
boundary, if we can tap into the more unstable air to our southwest, 
and the timing of shortwaves in the strong NW flow aloft. Machine-
learning guidance from the GEFS and Colorado State show some severe 
weather potential for our western/southwest counties in this period, 
and SPC highlights a small sliver of western Hampden County and 
western/central Hartford County in a 15% probability for severe 
weather for Wednesday, uncommon for what is a Day-5 forecast. Am 
skeptical we get entrenched into the more unstable air to our 
southwest but the best potential for doing so would more likely be 
south and west of Worcester. Something that we'll need to monitor as 
we get into the mesoscale model range. PoPs are pretty high given 
the medium-range nature of the forecast for the Tue thru Thurs 
timeframe, in the 30-60% range. Temperatures were kept in the 70s to 
low 80s Tue thru Thurs, with rather mild lows in the mid 60s (climo 
low temperature values are in the upper 50s/around 60).

&&

.AVIATION /00Z SUNDAY THROUGH THURSDAY/...
Forecaster Confidence Levels...

Low - less than 30 percent. 
Moderate - 30 to 60 percent. 
High - greater than 60 percent.

Tonight through Sunday...High confidence.

VFR. NW to N winds 5 to around 10 kt, becoming light this
afternoon. Local seabreezes continue through the afternoon,
kicking out around sunset or just after it. Winds shift to the 
SW overnight, with speeds less than 5 kt, then increase to 
around 10 kt Sunday. Some occasional gusts look possible in the
afternoon, particularly towards the Cape and Island terminals.

Sunday night...Moderate confidence.

VFR, though showers are possible across CT/RI/SE MA and into the
Cape and Islands. Periods of MVFR visibilities in any SHRA that
develop are possible, though confidence is low at this time.
Winds shift more NW heading into Monday morning, though remain
light.

KBOS Terminal...High confidence.

KBDL Terminal...High confidence.

Outlook /Monday through Thursday/...

Monday: VFR. 

Monday Night: VFR. Chance SHRA.

Tuesday: MVFR/IFR conditions possible. Chance SHRA, slight
chance TSRA.

Tuesday Night: Mainly VFR, with areas IFR possible. Chance
SHRA.

Wednesday: Mainly VFR, with areas IFR possible. Chance SHRA,
slight chance TSRA.

Wednesday Night: MVFR/IFR conditions possible. Chance SHRA,
slight chance TSRA.

Thursday: Mainly VFR, with areas IFR possible. Chance SHRA.

&&

.MARINE...
Forecaster Confidence Levels...

Low - less than 30 percent. 
Moderate - 30 to 60 percent. 
High - greater than 60 percent.

Through Sunday Night...High confidence.

High pressure remains over the waters today before shifting more
offshore Sunday. Showers may move in over the waters late Sunday
into Sunday night as weak low pressure tracks towards the waters
from the west. Local seabreezes continue through the rest of
this afternoon before winds shift more SW tonight. These SW
winds increase to around 15 kt Sunday with gusts around 20 kt 
possible in the afternoon and evening. Seas remain generally 2-3
ft with areas of 4 ft seas possible Sunday night.

Outlook /Monday through Thursday/...

Monday: Winds less than 25 kt. 

Monday Night: Winds less than 25 kt. Slight chance of rain
showers. 

Tuesday through Tuesday Night: Winds less than 25 kt. Chance of
rain showers, slight chance of thunderstorms. 

Wednesday: Winds less than 25 kt. Seas locally approaching
5 ft. Chance of rain showers. 

Wednesday Night: Winds less than 25 kt. Areas of seas
approaching 5 ft. Chance of rain showers. 

Thursday: Winds less than 25 kt. Areas of rough seas. Chance of
rain showers.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.

&&

$$

DISCUSSION...Loconto/Hrencecin
AVIATION...Loconto/BW/Hrencecin
MARINE...Loconto/Hrencecin

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