Lexington Weather
Lexington, Massachusetts, USA
- Clear
-
63.5°F / 17.5°C
-
46.0°F
-
53%
- Calm, 10-min avg: Calm, gust: 1 mph
- 10 miles
- 0.00 in
Current Conditions [‒] Current Conditions [+]
63.5°F
17.5°C
Comfortable
Clear
This Afternoon: Hi 64 °F
Tonight: Lo 50 °F
Dew Point:
46.0°F
Humidity:
53%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Friday: 0.00 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 1 mph
Forecast [‒] Forecast [+]
NWS Weather Forecast -
This Afternoon,
Tonight,
&
Sunday
through
Friday Night
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sat May 23, 2026 1:59pm EDT
Overview:
- Rain arrives late Saturday leading to a soggy and cool Sunday with much needed rainfall. Cool daytime highs Sunday will rise Sunday night.
- Wet to start Memorial Day, drying out through the day followed by summer-like warmth for the middle of next week before trending more seasonable with a few showers to end the week.
This Afternoon:
Cloudy
Hi 64 °F
Cloudy, with a high near 64. East wind around 9 mph.
Tonight:
Cloudy then Chance Light Rain
Lo 50 °F
A chance of rain after 1am. Cloudy, with a low around 50. Southeast wind 2 to 8 mph. Chance of precipitation is 50%.
Sunday:
Light Rain
Hi 51 °F
Rain. Cloudy, with a high near 51. East wind 3 to 12 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night:
Light Rain
Lo 50 °F
Rain before 8pm, then rain and a slight chance of thunderstorms between 8pm and 2am, then areas of drizzle and areas of fog and a chance of rain. Cloudy, with a low around 50. Northeast wind 6 to 12 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Memorial Day:
Chance Rain Showers
Hi 71 °F
A chance of rain showers before 2pm. Mostly cloudy, with a high near 71. Northwest wind around 6 mph. Chance of precipitation is 50%.
Monday Night:
Mostly Cloudy
Lo 55 °F
Mostly cloudy, with a low around 55. West wind around 5 mph.
Tuesday:
Mostly Sunny
Hi 80 °F
Mostly sunny, with a high near 80. West wind 2 to 7 mph.
Tuesday Night:
Mostly Clear
Lo 61 °F
Mostly clear, with a low around 61. Southwest wind around 6 mph.
Wednesday:
Mostly Sunny then Chance Rain Showers
Hi 85 °F
A chance of rain showers after 2pm. Mostly sunny, with a high near 85. West wind 5 to 10 mph. Chance of precipitation is 30%.
Wednesday Night:
Chance Rain Showers then Partly Cloudy
Lo 57 °F
A chance of rain showers before 9pm. Partly cloudy, with a low around 57. Northwest wind 5 to 8 mph. Chance of precipitation is 30%.
Thursday:
Slight Chance Rain Showers
Hi 76 °F
A slight chance of rain showers after 10am. Mostly sunny, with a high near 76. North wind 5 to 8 mph.
Thursday Night:
Slight Chance Rain Showers then Partly Cloudy
Lo 52 °F
A slight chance of rain showers before 8pm. Partly cloudy, with a low around 52. North wind 3 to 7 mph.
Friday:
Chance Rain Showers
Hi 70 °F
A chance of rain showers after 8am. Mostly sunny, with a high near 70. North wind around 8 mph. Chance of precipitation is 30%.
Friday Night:
Chance Rain Showers
Lo 50 °F
A chance of rain showers before 1am. Partly cloudy, with a low around 50. Northeast wind around 7 mph.
NWS Hourly Forecast -
Today 2pm through Mon 1am
Issued by:
National Weather Service Boston / Norton, MA
Updated Sat May 23, 2026 1:59pm EDT
2:00pm
Dew Pt 40°F
E 8 mphPrecip: 0%
3:00pm
Dew Pt 41°F
E 8 mphPrecip: 0%
4:00pm
Dew Pt 41°F
E 9 mphPrecip: 0%
5:00pm
Dew Pt 41°F
E 8 mphPrecip: 0%
6:00pm
Dew Pt 41°F
E 8 mphPrecip: 2%
7:00pm
Dew Pt 42°F
SE 7 mphPrecip: 4%
8:00pm
Dew Pt 42°F
SE 6 mphPrecip: 6%
9:00pm
Dew Pt 43°F
SE 5 mphPrecip: 8%
10:00pm
Dew Pt 42°F
SE 3 mphPrecip: 10%
11:00pm
Dew Pt 41°F
S 3 mphPrecip: 12%
12:00am
Dew Pt 41°F
S 3 mphPrecip: 13%
1:00am
Dew Pt 42°F
S 2 mphPrecip: 15%
2:00am
Dew Pt 42°F
S 3 mphPrecip: 17%
3:00am
Dew Pt 43°F
SE 2 mphPrecip: 27%
4:00am
Dew Pt 43°F
SE 3 mphPrecip: 37%
5:00am
Dew Pt 44°F
Wind Chill: 49°F
SE 3 mphPrecip: 47%
6:00am
Dew Pt 44°F
Wind Chill: 49°F
SE 3 mphPrecip: 58%
Rain: 0.01 in
7:00am
Dew Pt 45°F
Wind Chill: 48°F
SE 5 mphPrecip: 66%
Rain: 0.01 in
8:00am
Dew Pt 45°F
SE 6 mphPrecip: 73%
Rain: 0.02 in
9:00am
Dew Pt 45°F
SE 6 mphPrecip: 81%
Rain: 0.03 in
10:00am
Dew Pt 44°F
SE 7 mphPrecip: 89%
Rain: 0.03 in
11:00am
Dew Pt 44°F
E 7 mphPrecip: 97%
Rain: 0.03 in
12:00pm
Dew Pt 44°F
Wind Chill: 45°F
E 10 mphPrecip: 98%
Rain: 0.03 in
1:00pm
Dew Pt 46°F
Wind Chill: 45°F
E 10 mphPrecip: 98%
Rain: 0.03 in
2:00pm
Dew Pt 46°F
Wind Chill: 44°F
E 12 mphPrecip: 99%
Rain: 0.06 in
3:00pm
Dew Pt 46°F
Wind Chill: 44°F
E 12 mphPrecip: 99%
Rain: 0.06 in
4:00pm
Dew Pt 46°F
Wind Chill: 44°F
E 12 mphPrecip: 100%
Rain: 0.06 in
5:00pm
Dew Pt 46°F
Wind Chill: 44°F
E 12 mphPrecip: 100%
Rain: 0.06 in
6:00pm
Dew Pt 47°F
Wind Chill: 44°F
E 12 mphPrecip: 100%
Rain: 0.06 in
7:00pm
Dew Pt 48°F
Wind Chill: 46°F
E 12 mphPrecip: 100%
Rain: 0.06 in
8:00pm
Dew Pt 49°F
Wind Chill: 46°F
E 12 mphPrecip: 100%
Rain: 0.05 in
9:00pm
Dew Pt 49°F
Wind Chill: 46°F
E 12 mphPrecip: 92%
Rain: 0.05 in
10:00pm
Dew Pt 50°F
Wind Chill: 46°F
E 10 mphPrecip: 84%
Rain: 0.04 in
11:00pm
Dew Pt 51°F
E 9 mphPrecip: 76%
Rain: 0.04 in
12:00am
Dew Pt 51°F
E 8 mphPrecip: 68%
Rain: 0.04 in
1:00am
Dew Pt 51°F
NE 7 mphPrecip: 61%
Rain: 0.03 in
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 231744
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
144 PM EDT Sat May 23 2026
.WHAT HAS CHANGED...
Small Craft Advisories extended and expanded into the eastern
outer waters on late Sunday through Monday.
&&
.KEY MESSAGES...
- Rain arrives late Saturday leading to a soggy and cool Sunday
with much needed rainfall. Cool daytime highs Sunday will
rise Sunday night.
- Wet to start Memorial Day, drying out through the day followed
by summer-like warmth for the middle of next week before
trending more seasonable with a few showers to end the week.
&&
.DISCUSSION...
KEY MESSAGE 1...Rain arrives late Saturday leading to a soggy and
cool Sunday with much needed rainfall. Cool daytime highs Sunday
will rise Sunday night.
High pressure centered to our north and east will direct cool,
easterly onshore flow into southern New England today. This
trajectory with thickening and lowering clouds ahead of a warm front
will lead to a cool day, topping out in the mid 60s. Fortunately,
model soundings indicate a good amount of dry air in the low/mid
levels and this, together with stubborn high pressure will keep the
rain at bay for much of the region on Saturday. The most likely to
stay dry all day will be areas RI north and east, with a better
chance for afternoon or evening rain further west in CT and MA.
By mid to late afternoon widespread, isentropically forced rainfall
overspreads western CT/MA slowly expanding north and east. This is
the start of a prolonged period of wet weather that continues
through at least Sunday night. Forcing comes from low/mid level
convergence and a potent 30-50 kts LLJ acting on an anomolously
moist airmass (PWATs approaching 1.75"). Expecting rainfall totals
of 0.5-1" for most of the region, with 1-2" more likely along the
south coast of RI and MA before all is said and done. Small Craft
Advisories are in place on Sunday where better mixing over the water
will lead to wind gusts 25 to 35 mph while over land, gusts of 20 to
30 mph are more likely.
KEY MESSAGE 2...Wet to start Memorial Day, drying out through the
day followed by summer-like warmth for the middle of next week
before trending more seasonable with a few showers to end the week.
The mid level trough axis crosses SNE on Memorial Day ushering in a
period of drier, zonal flow to later be followed by much more
amplified flow late week. What it means for the Memorial Day is a
transition between a very wet low passage on Sunday/Sunday night and
dry high pressure on Tuesday. While confidence is only moderate at
this point, ensemble and deterministic guidance would suggest an
improving forecast through the day; read: best chance of lingering
showers early in the morning, with decreasing POPs as the day
progresses. This together with significantly warmer temperatures in
the low 70s will make Monday more palatable than Sunday for many,
even if clouds will be slow to clear.
Models then agree on a warmer and drier period through mid week as
850 mb temps rise to the 12-13C range meaning we'll be back into the
80s Tuesday, flirting with the upper 80s by Wednesday. For the back
half of the week, the previously mentioned return to amplified flow
introduces more rain chances and cooler periods.
&&
.AVIATION /18Z SATURDAY THROUGH THURSDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
18z TAF Update:
Through 00z Sunday: High confidence.
BKN/OVC VFR high clouds for most of the TAFs; exception is BDL
with OVC VFR ceilings to go along with light -RA. E/SE winds
5-10 kt.
Tonight: High confidence in TAF/trends but moderate on timing.
Mainly VFR through midnight/05z, with VFR -RA at BDL continuing.
Rain shield then begins to spread slowly eastward, and as
steadier rains develop, expect categories to deteriorate to
sub-VFR levels. MVFR visby RA with MVFR- IFR ceilings at BDL,
and deteriorating eastward with onset of light rain 07-10z,
becoming steadier shortly thereafter. SE winds increasing to
around 8-12 kt.
Sunday: Moderate confidence.
MVFR to IFR ceilings, steady light to moderate rain with visbys
3-5 SM. Localized downpours mainly for TAFs S/E of I-95 in the
afternoon. SE winds around 10-15 kt with gusts 20-25 kt,
becoming E/ENE for the eastern TAFs in afternoon.
Sunday Night: Moderate confidence.
MVFR-IFR in steady rain moving off the east coast around 03-06z.
Clearing of steadier rain then brings widespread IFR-LIFR with
drizzle, mist and fog with light NE winds.
KBOS...High confidence in TAF. VFR, east winds become SE around
10 kt by 00z Sunday. Onset of RA not likely until at least 08z,
becoming a steadier light rain with MVFR more likely after 10z.
KBDL...High confidence in TAF. VFR light -RA prevails thru
03-05z, then becoming steadier with MVFR visbys and ceilings
becoming MVFR-IFR. SE winds around 5-10 kt.
Outlook /Sunday Night through Thursday/...
Sunday Night: MVFR/IFR conditions possible. Breezy. Chance
SHRA, isolated TSRA.
Memorial Day: Mainly VFR, with local IFR possible. Chance SHRA.
Monday Night: VFR. Slight chance SHRA.
Tuesday: Mainly VFR, with local IFR possible.
Tuesday Night: VFR.
Wednesday: VFR. Breezy. Slight chance SHRA, slight chance TSRA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Saturday winds will be out of the E/SE 5-10 kts except 10-15 kts
on the southern waters. A frontal system will bring enhanced
southeast winds, building seas, and steady rain for the waters
this evening through Sunday. Over the southern waters, SE winds
increase to 25-30 kt by tonight, continuing through Sunday.
Seas 1-4 ft on Saturday build to 6 to 10 ft through Sunday. SCAs
are in effect for Sunday into Sunday night. Rain, some heavy at
times Sunday, could reduce visibility as well.
Outlook /Sunday Night through Thursday/...
Sunday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of rough seas. Rain showers, slight
chance of thunderstorms.
Memorial Day: Winds less than 25 kt. Seas up to 5 ft. Chance of
rain showers.
Monday Night: Winds less than 25 kt. Seas up to 5 ft. Slight
chance of rain showers.
Tuesday: Winds less than 25 kt. Areas of seas approaching 5 ft.
Tuesday Night: Winds less than 25 kt.
Wednesday: 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 5 AM Sunday to 2 AM EDT Monday for
ANZ231.
Small Craft Advisory from 2 AM Sunday to 5 AM EDT Monday for
ANZ232>235-237.
Small Craft Advisory from 5 PM Sunday to 8 PM EDT Monday for
ANZ250.
Small Craft Advisory from 8 PM this evening to 8 PM EDT Monday
for ANZ254>256.
&&
$$
DISCUSSION...BW
AVIATION...Belk/Loconto
MARINE...BW/Nash
Radar [‒] Radar [+]
Radar images courtesy Weather Underground / Intellicast.
Satellite [‒] Satellite [+]
Satellite images courtesy Weather Underground / Intellicast.
-
GOES
East
-
Weather
Underground
Visible -
Weather
Underground
Infrared -
Weather Underground
Wundermap
(opens in new tab)
Tap Click image to go to NESDIS
Tap Click image to go to Weather Underground
Tap Click image to go to Weather Underground
UV Forecast [‒] UV Forecast [+]
UV Index forecast from the Environmental Protection Agency
UV Index forecast high for today: 4 Medium
Current (Estimated): 4 Medium
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
Friday:
1.24 in
May:
8.74 in
2026
51.1 in
Season Snow:
Daily Extremes [‒] Daily Extremes [+]
1:38pm
64.6°F
High today:
4:51am
50.0°F
Low today:
2:16pm
62.4°F
High Friday:
6:17am
47.7°F
Low Friday:
4:51am
50.0°F
Low wind chill today:
6:17am
47.7°F
Low wind chill Friday:
10:58am
46.6°F
High dew pt today:
12:04am
42.3°F
High dew pt Friday:
11:27am
3 mph
Wind gust today:
1:48pm
7 mph
Wind gust Friday:
Alerts / Advisories [‒] Alerts / Advisories [+]
No alerts/warnings active for Southeast Middlesex County.
Sun / Moon [‒] Sun / Moon [+]
First Light:
4:43am
Sunrise:
5:16am
Sunset:
8:08pm
Twilight ends:
8:41pm
Daylight length:
14 hours 52 minutes
Phase:
First Quarter (53%)
Moon set:
1:32am
Moon rise:
12:33pm
Social Media - Mastodon [‒] Social Media - Mastodon [+]
© 2026, LexMAWeather
@LexMAWeather@toot.community
@LexMAWeather.toot.community.ap.brid.gy
Site development based on the USA and Meteobridge templates from
Saratoga-Weather.org.
Additional code adapted from
SE Lincoln Weather Scripts.
Weather data and images courtesy the National Weather Service, Environmental Protection Agency, AirNow, Weather Underground / Intellicast, Vaisala Xweather (formerly AerisWeather), earth.nullschool.net, Windy.com, and Leaflet/OpenStreetMap