Lexington Weather

Current Conditions [‒] Current Conditions [+]

46.0°F Warmer than last hour.

7.8°C

Chilly

Light rain, Overcast

Overnight: Lo 47 °F

Thursday: Hi 57 °F

Dew Point: 44.4°F Increased 0.2°F since last hour .

Humidity: 94%

Air Quality Index: 28

Good

(Ozone)

Barometer: 29.72 in S

1006 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.04 in

Rain Wednesday: 0.00 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Overnight, Thursday, & Thursday Night through Wednesday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Thu Apr 30, 2026 2:30am EDT

Overview:

- Steady rain continues through much of the day giving way to a clearing trend from west to east this afternoon.

- Cooler and mainly dry this weekend with a coastal storm passing well offshore.

- Warmer albeit unsettled conditions return next week.

Overnight:

Chance Rain Showers

Lo 47 °F

A chance of rain showers. Cloudy, with a low around 47. North wind around 2 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.

Thursday:

Rain Showers Likely

Hi 57 °F

Rain showers likely before 3pm. Cloudy, with a high near 57. Southeast wind around 3 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.

Thursday Night:

Slight Chance Rain Showers then Mostly Cloudy

Lo 45 °F

A slight chance of rain showers between 7pm and 8pm. Mostly cloudy, with a low around 45. West wind 2 to 6 mph. Chance of precipitation is 20%.

Friday:

Mostly Sunny

Hi 62 °F

Mostly sunny, with a high near 62. Northwest wind around 9 mph.

Friday Night:

Partly Cloudy

Lo 42 °F

Partly cloudy, with a low around 42. West wind 3 to 8 mph.

Saturday:

Partly Sunny then Chance Light Rain

Hi 60 °F

A chance of rain after noon. Partly sunny, with a high near 60. Southwest wind 3 to 7 mph. Chance of precipitation is 30%.

Saturday Night:

Chance Light Rain

Lo 43 °F

A chance of rain. Mostly cloudy, with a low around 43. West wind 3 to 7 mph. Chance of precipitation is 40%.

Sunday:

Chance Light Rain

Hi 58 °F

A chance of rain. Partly sunny, with a high near 58. Northwest wind 5 to 9 mph. Chance of precipitation is 40%.

Sunday Night:

Slight Chance Light Rain then Partly Cloudy

Lo 39 °F

A slight chance of rain before 7pm. Partly cloudy, with a low around 39. West wind 6 to 9 mph.

Monday:

Sunny

Hi 64 °F

Sunny, with a high near 64. Southwest wind 6 to 14 mph, with gusts as high as 26 mph.

Monday Night:

Slight Chance Rain Showers

Lo 49 °F

A slight chance of rain showers after 8pm. Partly cloudy, with a low around 49. Southwest wind around 12 mph, with gusts as high as 23 mph.

Tuesday:

Chance Rain Showers

Hi 72 °F

A chance of rain showers. Mostly sunny, with a high near 72. Southwest wind 8 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.

Tuesday Night:

Chance Rain Showers

Lo 50 °F

A chance of rain showers. Mostly cloudy, with a low around 50. Southwest wind 7 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

Wednesday:

Chance Rain Showers

Hi 72 °F

A chance of rain showers. Partly sunny, with a high near 72. Southwest wind 7 to 13 mph, with gusts as high as 24 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 6am through Fri 5pm

Issued by:
National Weather Service Boston / Norton, MA
Updated Thu Apr 30, 2026 2:30am EDT

6:00am

Rain Showers Likely

47°F
Dew Pt 45°F
Wind from N

N 2 mph
Precip: 60%
Rain: 0.01 in

7:00am

Rain Showers Likely

47°F
Dew Pt 45°F
Wind from E

E 2 mph
Precip: 56%
Rain: 0.01 in

8:00am

Chance Rain Showers

48°F
Dew Pt 47°F
Wind from E

E 2 mph
Precip: 46%
Rain: 0.01 in

9:00am

Chance Rain Showers

49°F
Dew Pt 47°F
Wind from NE

NE 2 mph
Precip: 48%
Rain: 0.02 in

10:00am

Chance Rain Showers

50°F
Dew Pt 47°F
Wind from SE

SE 2 mph
Precip: 27%
Rain: 0.02 in

11:00am

Chance Rain Showers

50°F
Dew Pt 48°F
Wind from S

S 2 mph
Precip: 40%
Rain: 0.02 in

12:00pm

Rain Showers Likely

52°F
Dew Pt 47°F
Wind from S

S 3 mph
Precip: 62%
Rain: 0.02 in

1:00pm

Chance Rain Showers

54°F
Dew Pt 48°F
Wind from SW

SW 3 mph
Precip: 44%
Rain: 0.01 in

2:00pm

Slight Chance Rain Showers

55°F
Dew Pt 48°F
Wind from SW

SW 3 mph
Precip: 16%
Rain: 0.02 in

3:00pm

Mostly Cloudy

55°F
Dew Pt 48°F
Wind from SW

SW 3 mph
Precip: 13%
Rain: 0.01 in

4:00pm

Mostly Cloudy

56°F
Dew Pt 48°F
Wind from SW

SW 3 mph
Precip: 8%

5:00pm

Mostly Cloudy

57°F
Dew Pt 48°F
Wind from SW

SW 3 mph
Precip: 6%

6:00pm

Mostly Cloudy

55°F
Dew Pt 48°F
Wind from SW

SW 3 mph
Precip: 3%

7:00pm

Slight Chance Rain Showers

55°F
Dew Pt 48°F
Wind from SW

SW 2 mph
Precip: 21%

8:00pm

Mostly Cloudy

55°F
Dew Pt 48°F
Wind from SW

SW 2 mph
Precip: 4%

9:00pm

Mostly Cloudy

53°F
Dew Pt 48°F
Wind from SW

SW 3 mph
Precip: 6%

10:00pm

Mostly Cloudy

52°F
Dew Pt 48°F
Wind from W

W 3 mph
Precip: 4%

11:00pm

Mostly Cloudy

51°F
Dew Pt 48°F
Wind from NW

NW 5 mph
Precip: 4%

Fri
12:00am

Mostly Cloudy

51°F
Dew Pt 46°F
Wind from NW

NW 6 mph
Precip: 3%

Fri
1:00am

Mostly Cloudy

50°F
Dew Pt 46°F
Wind Chill: 48°F
Wind from NW

NW 6 mph
Precip: 2%

Fri
2:00am

Partly Cloudy

49°F
Dew Pt 45°F
Wind Chill: 47°F
Wind from NW

NW 6 mph
Precip: 2%

Fri
3:00am

Partly Cloudy

48°F
Dew Pt 44°F
Wind Chill: 45°F
Wind from NW

NW 6 mph
Precip: 3%

Fri
4:00am

Partly Cloudy

47°F
Dew Pt 43°F
Wind Chill: 44°F
Wind from NW

NW 6 mph
Precip: 2%

Fri
5:00am

Partly Cloudy

46°F
Dew Pt 42°F
Wind Chill: 43°F
Wind from NW

NW 6 mph
Precip: 2%

Fri
6:00am

Mostly Sunny

46°F
Dew Pt 42°F
Wind Chill: 42°F
Wind from NW

NW 7 mph
Precip: 1%

Fri
7:00am

Sunny

46°F
Dew Pt 41°F
Wind Chill: 42°F
Wind from NW

NW 7 mph
Precip: 1%

Fri
8:00am

Sunny

48°F
Dew Pt 40°F
Wind Chill: 44°F
Wind from NW

NW 8 mph
Precip: 0%

Fri
9:00am

Sunny

50°F
Dew Pt 39°F
Wind Chill: 47°F
Wind from NW

NW 8 mph
Precip: 1%

Fri
10:00am

Sunny

53°F
Dew Pt 38°F
Wind from NW

NW 8 mph
Precip: 1%

Fri
11:00am

Sunny

56°F
Dew Pt 37°F
Wind from W

W 8 mph
Precip: 2%

Fri
12:00pm

Mostly Sunny

58°F
Dew Pt 36°F
Wind from W

W 8 mph
Precip: 2%

Fri
1:00pm

Mostly Sunny

59°F
Dew Pt 36°F
Wind from W

W 9 mph
Precip: 3%

Fri
2:00pm

Mostly Sunny

60°F
Dew Pt 35°F
Wind from W

W 9 mph
Precip: 3%

Fri
3:00pm

Mostly Sunny

61°F
Dew Pt 34°F
Wind from W

W 9 mph
Precip: 3%

Fri
4:00pm

Mostly Sunny

62°F
Dew Pt 33°F
Wind from W

W 9 mph
Precip: 4%

Fri
5:00pm

Mostly Sunny

61°F
Dew Pt 32°F
Wind from W

W 9 mph
Precip: 4%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 300636
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
236 AM EDT Thu Apr 30 2026

.WHAT HAS CHANGED...

Extended the Small Craft Advisory for the outer waters through 
8pm Friday.

&&

.KEY MESSAGES...

- Steady rain continues through much of the day giving way to a 
clearing trend from west to east this afternoon. 

- Cooler and mainly dry this weekend with a coastal storm passing 
well offshore.

- Warmer albeit unsettled conditions return next week.

&&

.DISCUSSION...

KEY MESSAGE 1... Steady rain continues through much of the day 
giving way to a clearing trend from west to east this afternoon. 

Broad lift from approaching low pressure brings a shield of rain to 
southern New England through much of the day today. Main area of low 
pressure tracks through the St. Lawrence Valley. Weak secondary low 
tracking from mid Atlantic will help enhance showers mainly across 
eastern Mass and the Islands this afternoon into the early evening. 
High-res guidance still shows some elevated instability developing 
by the afternoon as the dry slot works its way overhead. Best chance 
for any isolated thunder will be on the edge of the dry slot
focused near Cape Cod and Islands, but moreso offshore. Solid 
rainfall event on the order of around 0.5" for most, but still 
much needed given recent rainfall departures.

KEY MESSAGE 2...Cooler and mainly dry this weekend with a coastal 
storm passing well offshore.

Amplified pattern over the weekend should feature a building ridge 
of high pressure over central Canada which traps a closed 532 
decimeter upper low over southern Ontario. There are still slight 
differences among global guidance in the exact location and strength 
of the ridge over Canada. The ECMWF shows a more southern solution 
and thus a bit more in the way of shower activity later Saturday 
afternoon. On the whole, southern New England should be far 
enough removed from coldest air aloft to keep us mostly dry, 
especially given W/NW flow, but pattern certainly favors diurnal
clouds and perhaps a few afternoon sprinkles over weekend.

Guidance continues to show a fairly weak low that may bring a few 
showers or perhaps a period of light rain to the southern coast and 
the Cape/Islands Saturday night into Sunday morning. Recent trends 
still paint a weak unamplified picture with the majority of the EPS 
and GEFS ensembles showing a further offshore track. 

KEY MESSAGE 3... Warmer albeit unsettled conditions return next 
week.

Pattern relaxes a bit early next week as closed low lifts farther 
north, but we remain under broad cyclonic flow aloft. Eventually 
longer range guidance shows closed low setting up near upper Great 
Lakes, putting us in SW flow aloft. This could end up bringing more 
moisture and warmer air into region by Tuesday/Wednesday as weak 
front approaches resulting in scattered showers. Ensemble guidance 
shows 850 mb temp anomalies climbing to +10F above climo Tuesday and 
Wednesday of next week.

&&

.AVIATION /06Z THURSDAY THROUGH MONDAY/...
Forecaster Confidence Levels...

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

06z TAF Update: Moderate confidence due to timing of flight 
categories.

Widespread -SHRA thru 14z with IFR ceilings/visibilities. 
Showers come to an end around midday today with gradual 
improvement to MVFR ceilings, and possibly VFR later in day with
the exception of Cape Cod and Islands. 

Quick improvements to VFR from W to E tonight with slower
improvements for the Cape and Islands. 

KBOS Terminal...Moderate confidence. Reduced confidence in the
end time of IFR/LIFR this afternoon.

KBDL Terminal...High confidence in TAF.

Outlook /Friday Night through Monday/...

Friday Night: VFR. 

Saturday through Saturday Night: VFR. Chance RA.

Sunday: VFR. Breezy. Slight chance RA.

Sunday Night: VFR. 

Monday: VFR. Breezy. 

&&

.MARINE...
Forecaster Confidence Levels...

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

High confidence through the end of the week.

Pressure gradient between slow-moving low pressure SE of the 40/70 
benchmark and high pressure over the Canadian Maritimes keeps E/NE 
winds in play through the end of the week. 

Main issue will be the long fetch of NE winds resulting in rough 
seas of 5 to 8 feet on outer waters through Thu where SCA remains 
posted. Areas of fog will persist through tonight along with 
showers.

Outlook /Friday Night through Monday/...

Friday Night: Winds less than 25 kt. Seas up to 5 ft. 

Saturday: Winds less than 25 kt. Areas of seas approaching
5 ft. Slight chance of rain. 

Saturday Night through Sunday: Winds less than 25 kt. Seas
locally approaching 5 ft. Chance of rain. 

Sunday Night: Winds less than 25 kt. Areas of seas approaching
5 ft. 

Monday: Low risk for Small Craft Advisory winds with gusts up
to 30 kt. Seas up to 5 ft. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 8 AM EDT Friday for ANZ250.
     Small Craft Advisory until 8 PM EDT Friday for ANZ254>256.

&&

$$

DISCUSSION...FT
AVIATION...FT
MARINE...FT

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