Lexington Weather
Lexington, Massachusetts, USA
- Clear
-
54.3°F / 12.4°C
- 26.6°F
-
34%
- Calm, 10-min avg: Calm, gust: 2 mph
-
- 10 miles
- 0.00 in
National Weather Service Forecast for:
Lexington, MA
Issued by:
National Weather Service Boston / Norton, MA
This Afternoon through Saturday Night
Point Forecast Updated Sun Apr 12, 2026 1:59pm EDT
This Afternoon:
Slight Chance Rain Showers
Hi 58 °F
A slight chance of rain showers after 5pm. Partly sunny, with a high near 58. Southeast wind around 8 mph. Chance of precipitation is 20%.
Tonight:
Chance Rain Showers
Lo 44 °F
A chance of rain showers after 7pm. Cloudy, with a low around 44. South wind around 9 mph, with gusts as high as 23 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Monday:
Chance Rain Showers
Hi 68 °F
A chance of rain showers before 5pm. Mostly cloudy, with a high near 68. Southwest wind 9 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Monday Night:
Partly Cloudy
Lo 59 °F
Partly cloudy, with a low around 59. West wind 6 to 13 mph, with gusts as high as 28 mph. New rainfall amounts less than a tenth of an inch possible.
Tuesday:
Mostly Sunny then Slight Chance Rain Showers
Hi 79 °F
A slight chance of rain showers after 5pm. Mostly sunny, with a high near 79. Southwest wind 5 to 8 mph. Chance of precipitation is 20%.
Tuesday Night:
Chance Rain Showers
Lo 60 °F
A chance of rain showers before 1am. Mostly cloudy, with a low around 60. Southwest wind around 8 mph. Chance of precipitation is 30%.
Wednesday:
Partly Sunny then Slight Chance Rain Showers
Hi 81 °F
A slight chance of rain showers after 2pm. Partly sunny, with a high near 81. Southwest wind 6 to 12 mph, with gusts as high as 22 mph.
Wednesday Night:
Chance Rain Showers
Lo 60 °F
A chance of rain showers. Mostly cloudy, with a low around 60. West wind 5 to 9 mph. Chance of precipitation is 40%.
Thursday:
Slight Chance Rain Showers
Hi 73 °F
A slight chance of rain showers. Mostly cloudy, with a high near 73. Southeast wind 5 to 9 mph.
Thursday Night:
Chance Rain Showers
Lo 56 °F
A chance of rain showers. Mostly cloudy, with a low around 56. South wind around 8 mph. Chance of precipitation is 30%.
Friday:
Slight Chance Rain Showers
Hi 77 °F
A slight chance of rain showers. Mostly sunny, with a high near 77. West wind around 8 mph.
Friday Night:
Slight Chance Rain Showers then Partly Cloudy
Lo 53 °F
A slight chance of rain showers before 8pm. Partly cloudy, with a low around 53. North wind 3 to 7 mph.
Saturday:
Partly Sunny
Hi 74 °F
Partly sunny, with a high near 74. East wind 3 to 8 mph.
Saturday Night:
Chance Rain Showers
Lo 55 °F
A chance of rain showers after 8pm. Mostly cloudy, with a low around 55. South wind around 8 mph.
Today 3pm through Tue 2am EDT
Updated Sun Apr 12, 2026 2:42pm EDT
3:00pm
Dew Pt 23°F
S 7 mphPrecip: 4%
4:00pm
Dew Pt 24°F
SE 7 mphPrecip: 10%
5:00pm
Dew Pt 24°F
SE 8 mphPrecip: 17%
6:00pm
Dew Pt 26°F
SE 8 mphPrecip: 14%
7:00pm
Dew Pt 27°F
S 8 mphPrecip: 17%
8:00pm
Dew Pt 27°F
S 8 mphPrecip: 22%
9:00pm
Dew Pt 28°F
Wind Chill: 45°F
S 8 mphPrecip: 33%
10:00pm
Dew Pt 29°F
Wind Chill: 43°F
S 8 mphPrecip: 44%
Rain: 0.01 in
11:00pm
Dew Pt 30°F
Wind Chill: 42°F
S 8 mphPrecip: 45%
Rain: 0.01 in
12:00am
Dew Pt 32°F
Wind Chill: 40°F
S 8 mphPrecip: 47%
Rain: 0.01 in
1:00am
Dew Pt 34°F
Wind Chill: 40°F
S 8 mphPrecip: 44%
Rain: 0.01 in
2:00am
Dew Pt 36°F
Wind Chill: 40°F
S 8 mphPrecip: 39%
3:00am
Dew Pt 38°F
Wind Chill: 41°F
S 8 mphPrecip: 34%
4:00am
Dew Pt 39°F
Wind Chill: 41°F
S 9 mphPrecip: 31%
5:00am
Dew Pt 40°F
Wind Chill: 43°F
S 9 mphPrecip: 36%
6:00am
Dew Pt 41°F
Wind Chill: 44°F
S 9 mphPrecip: 34%
7:00am
Dew Pt 42°F
Wind Chill: 45°F
S 10 mphPrecip: 29%
8:00am
Dew Pt 44°F
S 12 mphPrecip: 12%
9:00am
Dew Pt 46°F
SW 13 mphPrecip: 10%
10:00am
Dew Pt 48°F
SW 13 mphPrecip: 7%
11:00am
Dew Pt 50°F
SW 13 mphPrecip: 8%
12:00pm
Dew Pt 51°F
SW 14 mphPrecip: 9%
1:00pm
Dew Pt 51°F
SW 14 mphPrecip: 10%
2:00pm
Dew Pt 51°F
SW 14 mphPrecip: 18%
3:00pm
Dew Pt 52°F
SW 14 mphPrecip: 19%
4:00pm
Dew Pt 52°F
SW 13 mphPrecip: 17%
5:00pm
Dew Pt 52°F
SW 13 mphPrecip: 14%
Rain: 0.01 in
6:00pm
Dew Pt 52°F
SW 13 mphPrecip: 11%
Rain: 0.01 in
7:00pm
Dew Pt 52°F
SW 10 mphPrecip: 8%
8:00pm
Dew Pt 54°F
SW 10 mphPrecip: 5%
9:00pm
Dew Pt 53°F
SW 10 mphPrecip: 5%
10:00pm
Dew Pt 53°F
W 9 mphPrecip: 5%
11:00pm
Dew Pt 54°F
W 9 mphPrecip: 5%
12:00am
Dew Pt 54°F
W 8 mphPrecip: 5%
1:00am
Dew Pt 55°F
W 8 mphPrecip: 4%
2:00am
Dew Pt 55°F
W 7 mphPrecip: 3%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 121853
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
253 PM EDT Sun Apr 12 2026
.WHAT HAS CHANGED...
Gale Watches have been upgraded to Gale Warnings Monday for
Cape Cod/Buzzards Bays and Nantucket/Vineyard Sounds.
&&
.KEY MESSAGES...
- Dry weather through this afternoon with highs in the 50s. A
few showers tonight, mainly across northern MA. Gusty
southerly winds develop for Monday, especially across the Cape
and Islands.
- Unseasonably warm, summer-like conditions are expected next
week with highs mainly in the 70s to low 80s, though
confidence is tempered by uncertainty in a possible backdoor
cold front; otherwise, mainly dry with only isolated showers
and a period of gusty winds Wednesday afternoon.
&&
.DISCUSSION...
KEY MESSAGE 1...Dry weather through this afternoon with highs
in the 50s. A few showers tonight, mainly across northern MA.
Gusty southerly winds develop for Monday, especially across the
Cape and Islands.
A large high pressure moves further offshore this afternoon,
leaving southern New England dry through the rest of the evening
with increasing cloudiness and high temperatures in the low to
mid 50s.
Later tonight, a shortwave associated with a warm front pushes
through the region, bringing increased chances for a few rain
showers (mainly across northern MA). As the warm front
approaches the region by daybreak Monday, a 45-55 knot
southwesterly LLJ develops over the South Shore and Cape. This
will bring a surge of warm air and gusty winds, leading to high
temperatures ranging from the mid 50s over the Cape/Islands to
upper 60s/low 70s further inland. Wind gusts increase to 30-40
mph over the Cape/Islands... 25- 30 mph elsewhere.
KEY MESSAGE 2...Unseasonably warm, summer-like conditions are
expected next week with highs mainly in the 70s to low 80s,
though confidence is tempered by uncertainty in a possible
backdoor cold front; otherwise, mainly dry with only isolated
showers and a period of gusty winds Wednesday afternoon.
Bottom line up front: a period of summer-like warmth is
expected away from the immediate coast beginning Tuesday and
lasting through the end of the workweek, as a strong subtropical
ridge develops over the Gulf. This will support southwest flow,
advecting higher moisture and temperatures into the Northeast.
That said, there are forecast challenges that could lead to
notable temperature busts, primarily tied to a potential
backdoor cold front. Uncertainty remains regarding the placement
of the backdoor cold front. On Tuesday, it appears to be
displaced north of southern New England. However, localized sea
breezes may develop, resulting in onshore flow and keeping
coastal communities noticeably cooler (upper 50s), while areas
just inland warm into the 70s. Few spots in the Connecticut
River Valley may approach 80F. By Wednesday, NAM12km places the
backdoor cold front across northeastern Massachusetts. While not
taken as gospel, it highlights the potential for a sharp
temperatures gradient across southern New England. Upper 40s to
lower 50s at the tip of Cape Ann and Cape Cod versus lower 80s
in the Connecticut River Valley. Ensembles guidance supports
this uncertainty, with temperature spreads of 20-25 degrees,
reflecting sensitivity to frontal placement and potential for
forecast busts. Confidence should improve as higher-resolution
guidance resolves this feature. For now, expect highs generally
in the 70s through the week (and possible into the upcoming
weekend) with a few days potentially reaching the lower 80s.
Western areas will likely be the warmest, while eastern areas
remain most susceptible to cooler marine air. Overnight lows
will be mild, in the mid-50s to lower 60s.
In terms of sensible weather, no significant synoptic systems
are on the horizon for the coming week. However, with elevated
PWATs, even weak forcing may be enough to generate a few
isolated showers or a rumble of thunder at times, mainly Tuesday
night and again Wednesday afternoon into the evening, as weak
surface lows and mid-level shortwaves traverse the periphery of
the Gulf-centered ridge. No widespread or washout rainfall is
expected. Additionally, Wednesday afternoon could become gusty
from a low-level jet passage. Opt'd to increase wind/gusts with
a blend of the NMB 90th percentile which bumped wind gusts
across interior southern New England to 20-30 mph.
&&
.AVIATION /18Z SUNDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
High confidence.
Mainly VFR conditions continue through Monday. A few showers
tonight mainly across northern MA may result in briefly lower
conditions in some areas. Possible MVFR-IFR conditions in low
clouds and fog patches developing near the south coast Monday
afternoon as high dewpoint air begins to work over the
relatively cold ocean.
Southerly winds 6-12 kt this afternoon, but with localized sea
breezes developing along parts of the immediate coast. SW winds
will increase overnight tonight into Monday with gusts of 20 to
30 kts expected in most areas, except up to 35 kts possible over
the Cape/Island terminals
KBOS Terminal... High confidence in TAF. Sea breeze should kick
out 23z-00z.
KBDL Terminal... High confidence in TAF.
Outlook /Tuesday through Friday/...
Tuesday through Tuesday Night: VFR. Slight chance SHRA.
Wednesday: VFR. Breezy. Slight chance SHRA.
Wednesday Night: VFR. Chance SHRA, slight chance TSRA.
Thursday through Friday: VFR. Slight chance SHRA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Monday Night...High confidence.
Winds/seas increase to Small Craft Advisory thresholds tonight
as a strengthening LLJ brings southwesterly wind gusts of 25 to
30+ kt over all the waters. Buzzards/Cape Cod Bays and
Nantucket/Vineyard Sounds could see some nearshore 35 kt gusts,
which prompted upgrading Gale Watches to Warning for Monday.
Will also likely see the development of fog across the southern
waters on Monday as high dewpoint air advects northward over the
relatively cold ocean.
Outlook /Tuesday through Friday/...
Tuesday: Winds less than 25 kt. Areas of seas approaching 5 ft.
Tuesday Night: Winds less than 25 kt. Areas of seas approaching
5 ft. Slight chance of rain showers.
Wednesday: Winds less than 25 kt. Seas locally approaching
5 ft.
Wednesday Night through Thursday Night: Winds less than 25 kt.
Seas locally approaching 5 ft. Slight chance of rain showers.
Friday: Winds less than 25 kt. Slight chance of rain showers.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 2 AM to 8 PM EDT Monday for ANZ230-
236.
Gale Warning from 6 AM to 6 PM EDT Monday for ANZ231>234.
Small Craft Advisory from 2 AM Monday to 5 AM EDT Tuesday for
ANZ235-237.
Small Craft Advisory from 10 PM this evening to 2 AM EDT
Tuesday for ANZ250-251.
Small Craft Advisory from 2 AM Monday to 8 AM EDT Tuesday for
ANZ254>256.
&&
$$
DISCUSSION...Dooley/McMinn
AVIATION...Dooley/McMinn
MARINE...McMinn
Meta data
Point forecast:
https://api.weather.gov/gridpoints/BOX/65,93/forecast
Zone forecast:
https://api.weather.gov/zones/forecast/MAZ014/forecast
Hourly forecast:
https://api.weather.gov/gridpoints/BOX/65,93/forecast/hourly
Hourly detail:
https://api.weather.gov/gridpoints/BOX/65,93
Point detail:
https://api.weather.gov/points/42.4399,-71.2405
Alerts:
https://api.weather.gov/alerts?active=1&point=42.4399,-71.2405
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