Lexington Weather

Current Conditions [‒] Current Conditions [+]

80.2°F Warmer than last hour.

26.8°C

Feels like 82.2°F

Hot

Partly cloudy

Today: Hi 82 °F

Tonight: Lo 62 °F

Dew Point: 66.0°F Increased 1.1°F since last hour .

Humidity: 62% Decreased 5.0% since last hour.

Air Quality Index: 37

Good

(Ozone)

Barometer: 29.75 in S

1007 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Wednesday: 0.00 in

Visibility: 10 miles

Wind:

Now: 2 mph

Avg: 1 mph

Gusts: 6 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Today, Tonight, & Friday through Wednesday Night

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Thu Aug 13, 2026 5:20am EDT

Overview:

- Scattered showers and thunderstorms remain possible today and Friday.

- Dry, seasonable, and comfortable weather returns for the weekend.

- Rain chances return late Sunday into Monday, followed by quieter weather into the middle of next week.

Today:

Slight Chance Rain Showers

Hi 82 °F

A slight chance of rain showers. Mostly sunny, with a high near 82. West wind around 7 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

Tonight:

Slight Chance Rain Showers then Mostly Clear

Lo 62 °F

A slight chance of rain showers before 7pm. Mostly clear, with a low around 62. Northwest wind around 7 mph. Chance of precipitation is 20%.

Friday:

Sunny

Hi 82 °F

Sunny, with a high near 82. Northwest wind around 8 mph.

Friday Night:

Mostly Clear

Lo 59 °F

Mostly clear, with a low around 59. Northwest wind around 6 mph.

Saturday:

Sunny

Hi 81 °F

Sunny, with a high near 81. North wind around 5 mph.

Saturday Night:

Mostly Clear

Lo 59 °F

Mostly clear, with a low around 59. Southwest wind around 5 mph.

Sunday:

Mostly Sunny then Slight Chance Rain Showers

Hi 81 °F

A slight chance of rain showers after 3pm. Mostly sunny, with a high near 81. Southwest wind 2 to 9 mph.

Sunday Night:

Showers And T-Storms Likely

Lo 64 °F

Sunday Night: Showers And Thunderstorms Likely

A chance of rain showers before 8pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 64. Southwest wind around 9 mph. Chance of precipitation is 70%.

Monday:

Showers And T-Storms Likely

Hi 81 °F

Monday: Showers And Thunderstorms Likely

Showers and thunderstorms likely before 5pm. Partly sunny, with a high near 81. West wind around 8 mph. Chance of precipitation is 60%.

Monday Night:

Partly Cloudy

Lo 62 °F

Partly cloudy, with a low around 62. Northwest wind around 6 mph.

Tuesday:

Sunny

Hi 82 °F

Sunny, with a high near 82. North wind around 5 mph.

Tuesday Night:

Mostly Clear

Lo 62 °F

Mostly clear, with a low around 62. South wind around 5 mph.

Wednesday:

Sunny

Hi 84 °F

Sunny, with a high near 84. Southwest wind 3 to 7 mph.

Wednesday Night:

Partly Cloudy then Chance Rain Showers

Lo 64 °F

A chance of rain showers after 2am. Partly cloudy, with a low around 64. Southwest wind around 7 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 12pm through Fri 11pm

Issued by:
National Weather Service Boston / Norton, MA
Updated Thu Aug 13, 2026 5:20am EDT

12:00pm

Mostly Sunny

78°F
Dew Pt 67°F
Wind from W

W 6 mph
Precip: 14%

1:00pm

Slight Chance Rain Showers

80°F
Dew Pt 67°F
Heat Index: 82°F
Wind from W

W 7 mph
Precip: 15%

2:00pm

Slight Chance Rain Showers

81°F
Dew Pt 67°F
Heat Index: 83°F
Wind from W

W 7 mph
Precip: 19%
Rain: 0.01 in

3:00pm

Mostly Sunny

82°F
Dew Pt 66°F
Heat Index: 84°F
Wind from W

W 7 mph
Precip: 14%

4:00pm

Slight Chance Rain Showers

82°F
Dew Pt 65°F
Heat Index: 84°F
Wind from W

W 7 mph
Precip: 18%

5:00pm

Slight Chance Rain Showers

82°F
Dew Pt 64°F
Heat Index: 83°F
Wind from NW

NW 7 mph
Precip: 20%
Rain: 0.01 in

6:00pm

Slight Chance Rain Showers

80°F
Dew Pt 64°F
Heat Index: 82°F
Wind from NW

NW 7 mph
Precip: 18%

7:00pm

Mostly Clear

78°F
Dew Pt 64°F
Wind from NW

NW 6 mph
Precip: 14%

8:00pm

Mostly Clear

76°F
Dew Pt 62°F
Wind from NW

NW 5 mph
Precip: 3%

9:00pm

Mostly Clear

72°F
Dew Pt 62°F
Wind from NW

NW 5 mph
Precip: 2%

10:00pm

Clear

71°F
Dew Pt 62°F
Wind from NW

NW 5 mph
Precip: 1%

11:00pm

Clear

70°F
Dew Pt 61°F
Wind from NW

NW 5 mph
Precip: 1%

Fri
12:00am

Clear

68°F
Dew Pt 61°F
Wind from NW

NW 5 mph
Precip: 1%

Fri
1:00am

Clear

67°F
Dew Pt 60°F
Wind from NW

NW 5 mph
Precip: 1%

Fri
2:00am

Clear

66°F
Dew Pt 60°F
Wind from NW

NW 5 mph
Precip: 0%

Fri
3:00am

Clear

64°F
Dew Pt 59°F
Wind from NW

NW 5 mph
Precip: 0%

Fri
4:00am

Clear

64°F
Dew Pt 58°F
Wind from NW

NW 5 mph
Precip: 0%

Fri
5:00am

Clear

63°F
Dew Pt 58°F
Wind from NW

NW 6 mph
Precip: 0%

Fri
6:00am

Sunny

62°F
Dew Pt 58°F
Wind from NW

NW 6 mph
Precip: 0%

Fri
7:00am

Sunny

64°F
Dew Pt 59°F
Wind from NW

NW 6 mph
Precip: 0%

Fri
8:00am

Sunny

67°F
Dew Pt 60°F
Wind from NW

NW 6 mph
Precip: 0%

Fri
9:00am

Sunny

69°F
Dew Pt 60°F
Wind from NW

NW 7 mph
Precip: 0%

Fri
10:00am

Sunny

74°F
Dew Pt 60°F
Wind from NW

NW 7 mph
Precip: 0%

Fri
11:00am

Sunny

77°F
Dew Pt 59°F
Wind from NW

NW 7 mph
Precip: 0%

Fri
12:00pm

Sunny

78°F
Dew Pt 59°F
Wind from NW

NW 8 mph
Precip: 0%

Fri
1:00pm

Sunny

80°F
Dew Pt 58°F
Heat Index: 81°F
Wind from NW

NW 8 mph
Precip: 0%

Fri
2:00pm

Sunny

81°F
Dew Pt 58°F
Wind from NW

NW 8 mph
Precip: 0%

Fri
3:00pm

Sunny

82°F
Dew Pt 58°F
Wind from NW

NW 8 mph
Precip: 0%

Fri
4:00pm

Sunny

81°F
Dew Pt 57°F
Wind from NW

NW 7 mph
Precip: 0%

Fri
5:00pm

Sunny

82°F
Dew Pt 57°F
Wind from NW

NW 7 mph
Precip: 0%

Fri
6:00pm

Clear

80°F
Dew Pt 57°F
Wind from NW

NW 6 mph
Precip: 0%

Fri
7:00pm

Clear

78°F
Dew Pt 57°F
Wind from NW

NW 5 mph
Precip: 1%

Fri
8:00pm

Clear

76°F
Dew Pt 56°F
Wind from NW

NW 5 mph
Precip: 4%

Fri
9:00pm

Mostly Clear

71°F
Dew Pt 55°F
Wind from NW

NW 5 mph
Precip: 5%

Fri
10:00pm

Mostly Clear

69°F
Dew Pt 55°F
Wind from N

N 5 mph
Precip: 5%

Fri
11:00pm

Mostly Clear

68°F
Dew Pt 55°F
Wind from N

N 5 mph
Precip: 6%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 131124
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
724 AM EDT Thu Aug 13 2026

.WHAT HAS CHANGED...
Monitoring early morning shower and embedded thunderstorms 
across southern New England, though storms aren't anticipated to
become severe.

&&

.KEY MESSAGES...

- Scattered showers and thunderstorms remain possible today and
  Friday.

- Dry, seasonable, and comfortable weather returns for the 
  weekend.

- Rain chances return late Sunday into Monday, followed by  
  quieter weather into the middle of next week.

&&

.DISCUSSION...
KEY MESSAGE 1...Scattered showers and thunderstorms remain possible 
today and Friday.

Monitoring a cluster of showers with embedded thunderstorms south of 
I-90 early this morning, mainly impacting Connecticut as of 0530Z. 
While storms remain sub-severe, they are producing lightning and 
localized wind gusts up to 40 mph. This complex of showers and 
storms will move east toward Rhode Island and southeastern 
Massachusetts prior to sunrise, leading to a wet start for the early 
morning commute. However, multiple runs of the HRRR overnight have 
shown the potential for a secondary cluster of showers and embedded 
thunderstorms to redevelop across eastern Connecticut, Rhode Island, 
and southeastern Massachusetts from 09Z to 12Z. Otherwise, expect a 
cloudy start to the day.

Clouds disperse this afternoon with daytime heating and mixing 
within the boundary layer, allowing temperatures to warm into the 
lower to middle 80s. Storm coverage this afternoon remains limited. 
As mentioned by the previous forecaster, the mid-levels are dry with 
northwest flow. Outside of a few hit-or-miss showers, the afternoon 
is largely dry as the better forcing remains associated with the mid-
level trough and shortwave across northern New England. By late this 
evening, the first cold front moves offshore, with a secondary surge 
of drier air reinforcing on Friday. CAMs try to initiate a few pop-
up storms along the edge of this boundary, but given the dry air in 
place, don't expect anything more than isolated coverage of garden-
variety thunderstorms. The vast majority of southern New England 
remains dry, with lower humidity and highs in the lower 80s.

KEY MESSAGE 2...Dry, seasonable, and comfortable weather returns for 
the weekend.

Quiet weather-wise this weekend as an area of high pressure 
originating from northern Canada settles across the Northeast for 
Saturday and the first half of Sunday. PWATs lower quite 
dramatically, with values between 0.5 and 0.7 inches, or nearly one 
standard deviation below normal. Thus, little to no humidity is 
expected Saturday, and conditions may actually feel quite dry, with 
almost fall-like humidity. Temperatures remain near seasonable 
levels, ranging from the upper 70s to lower 80s. Saturday night into 
Sunday morning, clear skies and light winds provide favorable 
conditions for effective radiational cooling. Lows tumble into the 
mid-50s, while urban centers hover near 60 degrees. On Sunday, high 
pressure exits as a low pressure system approaches from the Great 
Lakes region. Warm air advection ushers moisture northward from the 
southwest with the passage of a warm front, resulting in increasing 
cloud cover through the afternoon. Temperatures remain seasonable 
and similar to Saturday, though dew points increase to near 60 
degrees.

KEY MESSAGE 3...Rain chances return late Sunday into Monday, 
followed by quieter weather into the middle of next week.

The next opportunity for rainfall comes during the second half of 
Sunday into Monday. However, there remains uncertainty regarding 
rainfall amounts, as the best forcing is associated with the surface 
low and track variability makes it difficult to pin down where the 
greatest rainfall will occur. This is worth monitoring, as global 
guidance is in agreement that PWATs may exceed 2 inches, indicating 
the potential for heavy rainfall. This is also supported by a 
Marginal Risk (level 1 of 4) for excessive rainfall. Global 
ensembles highlight areas north of I-90 as having the greatest 
likelihood for measurable rainfall, with a 40-60 percent probability 
of at least a half inch of rain between Sunday evening and Monday 
evening. That said, if rainfall becomes more convective, localized 
totals could be higher. One positive is that this system appears 
progressive, with the cold front clearing east of New England on 
Monday. Drier air then advects in from the northwest, leading to 
another dry stretch from the latter half of Monday through Tuesday 
and Wednesday as surface high pressure builds back into the region. 
During this time, temperatures are expected to remain seasonable, 
with highs in the lower to middle 80s and tolerable humidity as dew 
points remain in the lower 60s.

&&

.AVIATION /12Z THURSDAY THROUGH MONDAY/...
Forecaster Confidence Levels...

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

Today...Moderate confidence.

Leftover SCT/BKN VFR/MVFR decks should begin to scatter out 
between 15-17Z, increasing the risk for SHRA/TS, mainly north of
the Mass Pike, as a sfc cold front moves through. Coverage 
looks spotty but will need to monitor with later updates. Winds
SW to W under 10 kt, then shifting to WNW/NW at 5-10 kt after 
20Z.

Tonight...High confidence.

Any lingering SHRA dissipates early, with VFR conditions prevailing 
thereafter. NW winds 5-10 kt.

Friday...High confidence.

VFR. Low probability of an isolated afternoon thunderstorm across 
interior southern New England; otherwise, dry. NW winds 8-12 kt.

KBOS Terminal...High confidence.

KBDL Terminal...High confidence.

Outlook /Friday Night through Monday/...

Friday Night through Saturday Night: VFR. 

Sunday: Mainly VFR, with local MVFR possible. Breezy. Chance
SHRA.

Sunday Night: Mainly VFR, with local IFR possible. Breezy.
Chance SHRA, slight chance TSRA.

Monday: VFR. Breezy. Chance SHRA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Friday...High confidence.

Early morning showers and embedded thunderstorms across the southern 
waters off the coasts of Rhode Island and southeastern Massachusetts 
today will clear by mid to late morning. SW to SSW winds are 
expected today, with gusts around 20 kt. Winds shift to the NW 
tonight at 10-15 kt and continue through Friday, along with dry 
conditions. Seas will remain below 3 ft throughout the forecast 
period.

Outlook /Friday Night through Monday/...

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

Saturday through Saturday Night: Winds less than 25 kt. 

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

Sunday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Local rough seas. Chance of rain showers,
slight chance of thunderstorms. 

Monday: 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.

&&

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

&&

$$

DISCUSSION...Dooley
AVIATION...BW/Dooley
MARINE...Dooley

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