Lexington Weather
Lexington, Massachusetts, USA
- Mist, Overcast
-
46.2°F / 7.9°C
-
44.8°F
- 95%
- Calm, 10-min avg: Calm, gust: None
-
- 3 miles
- 0.00 in
Current Conditions [‒] Current Conditions [+]
46.2°F
7.9°C
Chilly
Mist, Overcast
Today: Hi 55 °F
Tonight: Lo 35 °F
Dew Point:
44.8°F
Humidity: 95%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Saturday: 0.00 in
Visibility: 3 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
Forecast [‒] Forecast [+]
NWS Weather Forecast -
Today,
Tonight,
&
Monday
through
Saturday Night
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sun Apr 19, 2026 3:05am EDT
Today:
Light Rain
Hi 55 °F
A chance of rain showers and patchy fog before 9am, then rain and patchy fog between 9am and 11am, then rain and patchy fog and isolated thunderstorms. Cloudy. High near 55, with temperatures falling to around 45 in the afternoon. Southwest wind 5 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight:
Chance Light Rain then Partly Cloudy
Lo 35 °F
A chance of rain before 8pm. Partly cloudy, with a low around 35. West wind 6 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Monday:
Mostly Sunny then Chance Light Rain
Hi 50 °F
A chance of rain after noon. Mostly sunny, with a high near 50. West wind around 8 mph. Chance of precipitation is 30%.
Monday Night:
Slight Chance Rain Showers then Partly Cloudy
Lo 31 °F
A slight chance of rain showers before 8pm. Partly cloudy, with a low around 31. Northwest wind around 7 mph. Chance of precipitation is 20%.
Tuesday:
Sunny
Hi 50 °F
Sunny, with a high near 50. East wind around 7 mph.
Tuesday Night:
Partly Cloudy then Chance Rain Showers
Lo 36 °F
A chance of rain showers after 1am. Partly cloudy, with a low around 36. South wind around 7 mph. Chance of precipitation is 30%.
Wednesday:
Slight Chance Rain Showers then Mostly Cloudy
Hi 55 °F
A slight chance of rain showers before 8am. Mostly cloudy, with a high near 55. Southwest wind around 8 mph.
Wednesday Night:
Partly Cloudy
Lo 40 °F
Partly cloudy, with a low around 40. Southwest wind around 7 mph.
Thursday:
Partly Sunny
Hi 63 °F
Partly sunny, with a high near 63. Northwest wind 5 to 8 mph.
Thursday Night:
Partly Cloudy
Lo 41 °F
Partly cloudy, with a low around 41. Northwest wind around 7 mph.
Friday:
Mostly Sunny
Hi 60 °F
Mostly sunny, with a high near 60. North wind around 7 mph.
Friday Night:
Slight Chance Rain Showers
Lo 41 °F
A slight chance of rain showers after 9pm. Partly cloudy, with a low around 41. Northwest wind 3 to 7 mph.
Saturday:
Slight Chance Rain Showers
Hi 60 °F
A slight chance of rain showers. Partly sunny, with a high near 60. Northeast wind around 7 mph.
Saturday Night:
Chance Rain Showers
Lo 43 °F
A chance of rain showers. Mostly cloudy, with a low around 43. East wind around 7 mph.
NWS Hourly Forecast -
Today 7am through Mon 6pm
Issued by:
National Weather Service Boston / Norton, MA
Updated Sun Apr 19, 2026 3:05am EDT
7:00am
Dew Pt 45°F
Wind Chill: 45°F
S 5 mphPrecip: 30%
8:00am
Dew Pt 46°F
Wind Chill: 47°F
S 6 mphPrecip: 36%
Rain: 0.01 in
9:00am
Dew Pt 47°F
Wind Chill: 48°F
S 5 mphPrecip: 55%
Rain: 0.03 in
10:00am
Dew Pt 48°F
S 5 mphPrecip: 76%
Rain: 0.04 in
11:00am
Dew Pt 49°F
SW 5 mphPrecip: 84%
Rain: 0.04 in
12:00pm
Dew Pt 49°F
SW 6 mphPrecip: 78%
Rain: 0.04 in
1:00pm
Dew Pt 49°F
W 6 mphPrecip: 74%
Rain: 0.04 in
2:00pm
Dew Pt 48°F
NW 12 mphPrecip: 94%
Rain: 0.04 in
3:00pm
Dew Pt 45°F
Wind Chill: 45°F
NW 15 mphPrecip: 87%
Rain: 0.04 in
4:00pm
Dew Pt 42°F
Wind Chill: 41°F
NW 15 mphPrecip: 82%
Rain: 0.04 in
5:00pm
Dew Pt 39°F
Wind Chill: 38°F
NW 15 mphPrecip: 71%
Rain: 0.03 in
6:00pm
Dew Pt 39°F
Wind Chill: 38°F
NW 13 mphPrecip: 44%
Rain: 0.01 in
7:00pm
Dew Pt 37°F
Wind Chill: 37°F
NW 12 mphPrecip: 16%
8:00pm
Dew Pt 36°F
Wind Chill: 37°F
NW 10 mphPrecip: 6%
9:00pm
Dew Pt 35°F
Wind Chill: 36°F
W 9 mphPrecip: 2%
10:00pm
Dew Pt 34°F
Wind Chill: 34°F
W 9 mphPrecip: 2%
11:00pm
Dew Pt 33°F
Wind Chill: 35°F
W 8 mphPrecip: 0%
12:00am
Dew Pt 32°F
Wind Chill: 34°F
W 7 mphPrecip: 0%
1:00am
Dew Pt 31°F
Wind Chill: 34°F
W 7 mphPrecip: 0%
2:00am
Dew Pt 30°F
Wind Chill: 34°F
W 6 mphPrecip: 0%
3:00am
Dew Pt 29°F
Wind Chill: 32°F
W 6 mphPrecip: 0%
4:00am
Dew Pt 29°F
Wind Chill: 32°F
W 6 mphPrecip: 0%
5:00am
Dew Pt 28°F
Wind Chill: 31°F
W 6 mphPrecip: 1%
6:00am
Dew Pt 28°F
Wind Chill: 31°F
W 6 mphPrecip: 1%
7:00am
Dew Pt 29°F
Wind Chill: 32°F
W 6 mphPrecip: 1%
8:00am
Dew Pt 29°F
Wind Chill: 35°F
W 6 mphPrecip: 5%
9:00am
Dew Pt 30°F
Wind Chill: 37°F
W 6 mphPrecip: 7%
10:00am
Dew Pt 30°F
Wind Chill: 41°F
W 6 mphPrecip: 10%
11:00am
Dew Pt 29°F
Wind Chill: 44°F
W 6 mphPrecip: 13%
12:00pm
Dew Pt 28°F
Wind Chill: 46°F
W 7 mphPrecip: 15%
1:00pm
Dew Pt 28°F
Wind Chill: 46°F
W 8 mphPrecip: 18%
2:00pm
Dew Pt 27°F
Wind Chill: 46°F
W 8 mphPrecip: 20%
3:00pm
Dew Pt 27°F
Wind Chill: 47°F
W 8 mphPrecip: 22%
4:00pm
Dew Pt 27°F
Wind Chill: 46°F
NW 8 mphPrecip: 25%
5:00pm
Dew Pt 27°F
Wind Chill: 46°F
NW 7 mphPrecip: 28%
6:00pm
Dew Pt 28°F
Wind Chill: 44°F
NW 7 mphPrecip: 23%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 191114
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
714 AM EDT Sun Apr 19 2026
.WHAT HAS CHANGED...
Wind gusts associated with the cold front will likely bring small
craft advisory conditions across the northern waters as well.
Confidence continuing to increase in the chance for scattered
showers and increased cloud cover associated with a weak low
pressure Monday.
&&
.KEY MESSAGES...
- Strong cold front brings a round of widespread showers today.
Leaves colder temperatures and drier conditions in its wake.
- Cooler than normal Monday. Generally dry weather expected in
the morning, then increased cloud cover and the chance for
spotty showers moves in during the afternoon.
- Seasonable temperatures Wednesday, then another cold front
arrives.
&&
.DISCUSSION...
KEY MESSAGE 1...Strong cold front brings a round of widespread
showers today. Leaves colder temperatures and drier conditions in
its wake.
A strong cold front today will bring a round of widespread showers.
This front is part of a strong upper level trough that will continue
shifting east from the Great Lakes today into Monday. Ahead of this
front and trough, PWAT values this morning ahead of the front are
elevated, reaching 1.4". This is part of a moisture plume that will
help set the stage for the widespread rain today. Given these higher
values, moderate to heavy rainfall rates are a possibility. The
progressive nature of these incoming showers with the front should
keep any flash flooding threat at bay, however, localized rainfall
totals of around an inch cannot be ruled out in any convective
showers that develop. MUCAPE around 500 J/kg this afternoon is
indicative of some marginal instability that could lead to some
embedded thunderstorms/convective showers.
Colder and drier air is left in the front's wake, reinforced by
breezy W to NW winds starting this afternoon. Gusts to 30 MPH are a
possibility post-front, particularly towards the Cape and Islands.
Elsewhere, gusts to 25 MPH can be expected. Showers may be mixed
with some snow in the higher elevations of western MA as this colder
airmass takes hold, but any accumulations more than a coating at
most are not expected at this time. Lows tonight will likely fall to
the upper 20s, while more urban areas, the Cape and Islands, and the
CT Valley can expect lows in the mid to upper 30s.
KEY MESSAGE 2...Cooler than normal Monday. Generally dry weather
expected in the morning, then increased cloud cover and the chance
for spotty showers moves in during the afternoon.
The upper level trough settles overhead Monday, and with it, an
unseasonably cold airmass moves in. 925 mb temperatures fall below
0C during the day, then further to -5C heading into the overnight
hours. Breezy W to NW winds continue, and highs may not climb out of
the upper 40s and low 50s. Winds will start to diminish as high
pressure approaches from the west, and lows Monday night may fall
into the 20s for much of southern New England, aside from the
coastal areas where 30s can be expected. Even with approaching high
pressure, guidance has continued to indicate a weak low pressure
moving into the region Monday that would bring increased clouds and
scattered showers. Across different guidance suites, high res and
global scale models have continued to trend towards scattered
showers popping up in the afternoon hours. Some spatial and temporal
discrepancies do still exist, but latest trends indicate the chance
for these showers starting out in the interior by the late
morning/early afternoon hours, then moving east through the day.
Showers would then be expected out in eastern MA by the late
afternoon/evening hours if this trend holds. Outside of system,
incoming high pressure should keep the region dry for much of the
start of the week.
KEY MESSAGE 3...Seasonable temperatures Wednesday, then another
cold front arrives.
Some showers are a possibility once again heading into Wednesday as
another shortwave approaches, but more seasonable temperatures make
a return as the trough from early in the week exits. 925 mb
temperatures recover to around 5C, supporting more seasonable highs
in the upper 50s/low 60s. NW flow makes a return towards
Thursday/Friday in the wake of another front passing through
sometime late Wednesday, and high pressure builds back in as ridging
approaches, which should keep the region dry. Discrepancies
regarding the placement of the edge of the trough over northern
New England and parts of eastern Canada may also affect how far
east the warmer temperatures aloft make it for the second half
of the week. These would likely, in turn, affect highs later in
the week. High pressure returns going into Friday as a ridge
approaches, but guidance is hinting at another approaching
disturbance in the Great Lakes region towards the end of the
week that could bring increased rain chances.
&&
.AVIATION /12Z SUNDAY THROUGH THURSDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
12Z TAF Update:
Today...Moderate Confidence.
IFR/LIFR conditions persist through the morning until a cold
front arrives from west to east with -RA between 15-18Z. Steady
improvements to IFR/MVFR thereafter with a period of gusty
post-frontal winds between 18-00Z. Gusts from 25 to 30 knots
possible.
Sunday Night...High Confidence.
VFR. Diminishing wind gusts. W wind 5-10 knots.
Monday...High Confidence.
VFR. Scattered SHRA possible, but VFR conditions expected to
continue. W winds sustained up to 10 kt shifting more NW later
in the day.
KBOS Terminal...Moderate confidence in TAF. Timing of wind shift
should be 17-18Z. Expect MVFR vsbys this morning between 3-5SM
with persistent IFR/LIFR ceilings. Gradual improvements to MVFR
after 18Z wind shift, expect VFR ceilings by around 00Z.
KBDL Terminal...High confidence in TAF.
Outlook /Monday Night through Thursday/...
Monday Night: VFR. Breezy.
Tuesday: VFR.
Tuesday Night: Mainly VFR, with local MVFR possible. Slight
chance SHRA.
Wednesday: Mainly VFR, with areas MVFR possible.
Wednesday Night through Thursday: VFR.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Sunday Night: High Confidence.
Strong cold front today brings SCA conditions and rain, seas
3-5 feet, and W-NW gust up to 30 knots for most of the waters
this evening into early Monday morning. Winds shift NW and ease
following this frontal passage late tonight. Winds shift W over
the southern waters and more S over the eastern/northern waters
Monday and fall to 10-15 knots. Seas also fall to 2-3 ft.
Outlook /Monday Night through Thursday/...
Monday Night: Winds less than 25 kt. Slight chance of rain
showers.
Tuesday: Winds less than 25 kt.
Tuesday Night: Winds less than 25 kt. Slight chance of rain
showers.
Wednesday: Winds less than 25 kt. Seas locally approaching
5 ft. Slight chance of rain showers.
Wednesday Night: Winds less than 25 kt. Seas locally
approaching 5 ft.
Thursday: Winds less than 25 kt.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 4 PM this afternoon to 8 PM EDT this
evening for ANZ230>232-250-251.
Small Craft Advisory from 11 AM this morning to 6 PM EDT this
evening for ANZ235-237.
Small Craft Advisory from 11 AM this morning to 11 PM EDT this
evening for ANZ254>256.
&&
$$
DISCUSSION...Hrencecin
AVIATION...RM
MARINE...Hrencecin
Radar [‒] Radar [+]
Radar images courtesy Weather Underground / Intellicast.
Satellite [‒] Satellite [+]
Satellite images courtesy Weather Underground / Intellicast.
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UV Forecast [‒] UV Forecast [+]
UV Index forecast from the Environmental Protection Agency
UV Index forecast high for today: 1 Low
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:
0.00 in
Rain Today:
0.00 in
Saturday:
1.51 in
April:
7.13 in
2026
51.1 in
Season Snow:
1 snow day in April
Daily Extremes [‒] Daily Extremes [+]
7:32am
46.2°F
High today:
1:38am
45.3°F
Low today:
1:08pm
58.6°F
High Saturday:
4:21am
45.7°F
Low Saturday:
1:38am
45.3°F
Low wind chill today:
4:21am
45.7°F
Low wind chill Saturday:
7:32am
44.8°F
High dew pt today:
11:45am
50.9°F
High dew pt Saturday:
None
Wind gust today:
12:48pm
9 mph
Wind gust Saturday:
Alerts / Advisories [‒] Alerts / Advisories [+]
No alerts/warnings active for Southeast Middlesex County.
Sun / Moon [‒] Sun / Moon [+]
First Light:
5:27am
Sunrise:
5:57am
Sunset:
7:31pm
Twilight ends:
8:01pm
Daylight length:
13 hours 34 minutes
Phase:
Waxing Crescent (6%)
Moon rise:
6:50am
Moon set:
10:54pm
Social Media - Mastodon [‒] Social Media - Mastodon [+]
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