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Lexington Weather

Lexington, Massachusetts, USA

73°F
5/19/2026 11:16pm 
  • Lexington Conditions: Clear
  • Temperature: 73.0°F / 22.8°CColder 0.6°F than last hour.
  • Dew Point: 70.3°FDecreased 0.4°Fsince last hour.
  • Relative Humidity: 91
  • Wind: Calm, 10-min avg: Calm, gust: 4 mph
  • Barometer: 29.84 in Steady
  • Visibility: 10 miles
  • Rain Today: 0.08 in
  •   
Southeast Middlesex County, MA - Heat Advisory
 - SEE ALL NEARBY ALERTS -

Current Conditions [‒] Current Conditions [+]

73.0°F Colder than last hour.

22.8°C

 

 Very Muggy 

Clear

Clear

Tonight:  Lo 71 °F

Wednesday:  Hi 90 °F

 

Dew Point:  70.3°F Decreased 0.4°F since last hour.

Humidity:  91%  

 

Air Quality Index: 55

 Moderate 

(Fine Particles)

Barometer:  29.84 in S

1010 mb

 

Rain Rate:  0.00 in/hr

Rain Today:  0.08 in

Rain Monday 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 4 mph

Calm wind


Forecast [‒] Forecast [+]

NWS Weather Forecast -
Tonight, Wednesday, & Wednesday Night through Tuesday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Tue May 19, 2026 8:07pm EDT


Overview:

- Lingering thunderstorm activity quickly winds down with the loss of daytime heating. Expecting very warm minimum temps tonight with lows in the 60s and low to mid 70s in more urban areas.

- Final day of record warmth Wednesday with highs in the 90s away from the immediate coast. Chance for strong to severe thunderstorms by the afternoon with a risk for damaging winds and small hail.

- Cooler temperatures through Memorial Day Weekend. Unsettled weather returns for the weekend with periods of rain possible, but confidence is low.



Tonight:

Mostly Clear

Lo 71 °F

Tonight: Mostly Clear

Mostly clear, with a low around 71. Southwest wind around 8 mph.


Wednesday:

Mostly Sunny then Chance Showers And T-Storms

Hi 90 °F

Wednesday: Mostly Sunny then Chance Showers And Thunderstorms

A chance of rain showers between 2pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 90. West wind 8 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.


Wednesday Night:

Slight Chance Rain Showers then Mostly Cloudy

Lo 55 °F

Wednesday Night: Slight Chance Rain Showers then Mostly Cloudy

A slight chance of rain showers before 7pm. Mostly cloudy, with a low around 55. Northwest wind 8 to 13 mph. Chance of precipitation is 20%.


Thursday:

Partly Sunny

Hi 68 °F

Thursday: Partly Sunny

Partly sunny, with a high near 68. Northwest wind around 9 mph.


Thursday Night:

Partly Cloudy

Lo 47 °F

Thursday Night: Partly Cloudy

Partly cloudy, with a low around 47. North wind around 6 mph.


Friday:

Mostly Sunny

Hi 68 °F

Friday: Mostly Sunny

Mostly sunny, with a high near 68. East wind 2 to 7 mph.


Friday Night:

Mostly Cloudy then Slight Chance Rain Showers

Lo 49 °F

Friday Night: Mostly Cloudy then Slight Chance Rain Showers

A slight chance of rain showers after 3am. Mostly cloudy, with a low around 49. Southwest wind 1 to 7 mph.


Saturday:

Chance Rain Showers

Hi 62 °F

Saturday: Chance Rain Showers

A chance of rain showers. Mostly cloudy, with a high near 62. East wind 1 to 7 mph. Chance of precipitation is 40%.


Saturday Night:

Chance Rain Showers

Lo 47 °F

Saturday Night: Chance Rain Showers

A chance of rain showers. Mostly cloudy, with a low around 47. East wind 2 to 6 mph. Chance of precipitation is 50%.


Sunday:

Chance Rain Showers

Hi 61 °F

Sunday: Chance Rain Showers

A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 61. East wind 3 to 9 mph. Chance of precipitation is 50%.


Sunday Night:

Chance Showers And T-Storms

Lo 48 °F

Sunday Night: Chance Showers And Thunderstorms

A chance of showers and thunderstorms. Mostly cloudy, with a low around 48. East wind 3 to 7 mph. Chance of precipitation is 50%.


Memorial Day:

Chance Rain Showers

Hi 67 °F

Memorial Day: Chance Rain Showers

A chance of rain showers before 3pm. Mostly cloudy, with a high near 67. Northeast wind 3 to 7 mph. Chance of precipitation is 40%.


Monday Night:

Slight Chance Rain Showers

Lo 51 °F

Monday Night: Slight Chance Rain Showers

A slight chance of rain showers after 8pm. Mostly cloudy, with a low around 51. North wind 2 to 6 mph.


Tuesday:

Slight Chance Rain Showers

Hi 72 °F

Tuesday: Slight Chance Rain Showers

A slight chance of rain showers. Partly sunny, with a high near 72. North wind 2 to 6 mph.


NWS Hourly Forecast -
Tonight 11pm through Thu 10am

Issued by:
National Weather Service Boston / Norton, MA
Updated Tue May 19, 2026 8:07pm EDT

 
11:00pm
Tue 11:00pm: Mostly Clear
Mostly Clear
75°F
Dew Pt 63°F
Wind from SW SW 6 mph
Precip: 1%
Wed
12:00am
Wed 12:00am: Mostly Clear
Mostly Clear
74°F
Dew Pt 62°F
Wind from SW SW 6 mph
Precip: 2%
Wed
1:00am
Wed 1:00am: Mostly Clear
Mostly Clear
73°F
Dew Pt 62°F
Wind from SW SW 6 mph
Precip: 2%
Wed
2:00am
Wed 2:00am: Mostly Clear
Mostly Clear
72°F
Dew Pt 61°F
Wind from SW SW 7 mph
Precip: 1%
Wed
3:00am
Wed 3:00am: Mostly Clear
Mostly Clear
72°F
Dew Pt 61°F
Wind from SW SW 7 mph
Precip: 1%
Wed
4:00am
Wed 4:00am: Mostly Clear
Mostly Clear
71°F
Dew Pt 60°F
Wind from SW SW 7 mph
Precip: 2%
Wed
5:00am
Wed 5:00am: Partly Cloudy
Partly Cloudy
71°F
Dew Pt 60°F
Wind from SW SW 7 mph
Precip: 3%
Wed
6:00am
Wed 6:00am: Mostly Sunny
Mostly Sunny
72°F
Dew Pt 60°F
Wind from SW SW 8 mph
Precip: 3%
Wed
7:00am
Wed 7:00am: Mostly Sunny
Mostly Sunny
74°F
Dew Pt 60°F
Wind from SW SW 8 mph
Precip: 4%
Wed
8:00am
Wed 8:00am: Sunny
Sunny
76°F
Dew Pt 62°F
Wind from SW SW 8 mph
Precip: 8%
Wed
9:00am
Wed 9:00am: Sunny
Sunny
80°F
Dew Pt 62°F
Heat Index: 81°F
Wind from W W 9 mph
Precip: 7%
Wed
10:00am
Wed 10:00am: Sunny
Sunny
83°F
Dew Pt 63°F
Heat Index: 84°F
Wind from W W 10 mph
Precip: 6%
Wed
11:00am
Wed 11:00am: Sunny
Sunny
85°F
Dew Pt 64°F
Heat Index: 86°F
Wind from W W 12 mph
Precip: 7%
Wed
12:00pm
Wed 12:00pm: Mostly Sunny
Mostly Sunny
86°F
Dew Pt 64°F
Heat Index: 87°F
Wind from W W 12 mph
Precip: 7%
Wed
1:00pm
Wed 1:00pm: Sunny
Sunny
87°F
Dew Pt 64°F
Heat Index: 88°F
Wind from W W 13 mph
Precip: 14%
Wed
2:00pm
Wed 2:00pm: Slight Chance Rain Showers
Slight Chance Rain Showers
86°F
Dew Pt 64°F
Heat Index: 87°F
Wind from W W 13 mph
Precip: 20%
Wed
3:00pm
Wed 3:00pm: Chance Rain Showers
Chance Rain Showers
88°F
Dew Pt 63°F
Heat Index: 89°F
Wind from W W 13 mph
Precip: 26%
Wed
4:00pm
Wed 4:00pm: Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
90°F
Dew Pt 62°F
Wind from W W 13 mph
Precip: 32%
Wed
5:00pm
Wed 5:00pm: Chance Rain Showers
Chance Rain Showers
86°F
Dew Pt 60°F
Wind from W W 13 mph
Precip: 25%
Wed
6:00pm
Wed 6:00pm: Slight Chance Rain Showers
Slight Chance Rain Showers
85°F
Dew Pt 58°F
Wind from W W 13 mph
Precip: 15%
Wed
7:00pm
Wed 7:00pm: Partly Cloudy
Partly Cloudy
82°F
Dew Pt 54°F
Wind from W W 10 mph
Precip: 7%
Wed
8:00pm
Wed 8:00pm: Partly Cloudy
Partly Cloudy
75°F
Dew Pt 52°F
Wind from W W 9 mph
Precip: 3%
Wed
9:00pm
Wed 9:00pm: Mostly Clear
Mostly Clear
72°F
Dew Pt 50°F
Wind from W W 8 mph
Precip: 0%
Wed
10:00pm
Wed 10:00pm: Mostly Cloudy
Mostly Cloudy
69°F
Dew Pt 49°F
Wind from W W 8 mph
Precip: 0%
Wed
11:00pm
Wed 11:00pm: Mostly Cloudy
Mostly Cloudy
67°F
Dew Pt 48°F
Wind from NW NW 8 mph
Precip: 0%
Thu
12:00am
Thu 12:00am: Mostly Cloudy
Mostly Cloudy
65°F
Dew Pt 46°F
Wind from NW NW 8 mph
Precip: 0%
Thu
1:00am
Thu 1:00am: Mostly Cloudy
Mostly Cloudy
64°F
Dew Pt 45°F
Wind from NW NW 8 mph
Precip: 0%
Thu
2:00am
Thu 2:00am: Mostly Cloudy
Mostly Cloudy
61°F
Dew Pt 43°F
Wind from NW NW 8 mph
Precip: 0%
Thu
3:00am
Thu 3:00am: Mostly Cloudy
Mostly Cloudy
60°F
Dew Pt 41°F
Wind from N N 8 mph
Precip: 1%
Thu
4:00am
Thu 4:00am: Mostly Cloudy
Mostly Cloudy
58°F
Dew Pt 40°F
Wind from N N 8 mph
Precip: 2%
Thu
5:00am
Thu 5:00am: Mostly Cloudy
Mostly Cloudy
57°F
Dew Pt 38°F
Wind from N N 9 mph
Precip: 3%
Thu
6:00am
Thu 6:00am: Mostly Cloudy
Mostly Cloudy
56°F
Dew Pt 37°F
Wind from N N 9 mph
Precip: 3%
Thu
7:00am
Thu 7:00am: Partly Sunny
Partly Sunny
55°F
Dew Pt 36°F
Wind from N N 9 mph
Precip: 2%
Thu
8:00am
Thu 8:00am: Mostly Cloudy
Mostly Cloudy
55°F
Dew Pt 34°F
Wind from N N 9 mph
Precip: 3%
Thu
9:00am
Thu 9:00am: Cloudy
Cloudy
57°F
Dew Pt 34°F
Wind from N N 8 mph
Precip: 3%
Thu
10:00am
Thu 10:00am: Mostly Cloudy
Mostly Cloudy
59°F
Dew Pt 34°F
Wind from N N 7 mph
Precip: 3%




Radar [‒] Radar [+]

Satellite [‒] Satellite [+]

Satellite images courtesy Weather Underground / Intellicast.

GOES East  

Tap Click image to go to NESDIS

Weather Underground Visible

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Weather Underground Infrared

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UV Forecast [‒] UV Forecast [+]

UV Index forecast from the Environmental Protection Agency

UV Index forecast high for today: 8    Very High 

Current (Estimated): 0   None

Precipitation [‒] Precipitation [+]

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:

0.08 in

Rain Today:

0.00 in

Monday:

1.24 in

May:

8.74 in

2026

51.1 in

Season Snow:

Daily Extremes [‒] Daily Extremes [+]

2:41pm

95.5°F

High today:

2:18am

68.9°F

Low today:

11:57am

75.0°F

High Monday:

6:55am

59.4°F

Low Monday:

11:36am

73.6°F

High dew pt today:

10:57pm

63.1°F

High dew pt Monday:

1:16pm

101.4°F

High heat index today:

5:17pm

19 mph

Wind gust today:

3:12pm

5 mph

Wind gust Monday:


Sun / Moon [‒] Sun / Moon [+]

Sun

First Light:

4:46am

Sunrise:

5:19am

Sunset:

8:04pm

Twilight ends:

8:37pm

Daylight length:

14 hours 45 minutes

Waxing Crescent, Moon age: 3 days, 7 hours, 16 minutes, 16%

Phase:

Waxing Crescent (16%)

Moon rise:

7:30am

Moon set:

11:51pm


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