Old Res Weather
Lexington, Massachusetts, USA
- Clear
-
35.1°F / 1.7°C
-
32.4°F
- 90%
- Calm, 10-min avg: Calm, gust: None
-
- 10 miles
- 0.01 in
- $VPuv None
Current Conditions [‒] Current Conditions [+]
35.1°F
1.7°C
Cold
Clear
This Afternoon: Hi 41 °F
Tonight: Lo 23 °F
Dew Point:
32.4°F
Humidity: 90%
UV Index: 0.0 None
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.01 in
Rain Thursday: 0.00 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
Expected Snow [‒] Expected Snow [+]
72-Hour Snowfall Forecast
For Lexington, 1" expected.
Forecast [‒] Forecast [+]
NWS Weather Forecast -
This Afternoon,
Tonight,
&
Saturday
through
Thursday Night
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Fri Feb 27, 2026 2:35pm EST
This Afternoon:
Sunny
Hi 41 °F
Sunny, with a high near 41. South wind around 6 mph.
Tonight:
Mostly Clear
Lo 23 °F
Mostly clear, with a low around 23. South wind around 7 mph.
Saturday:
Patchy Fog then Mostly Sunny
Hi 50 °F
Patchy fog between 8am and 10am. Mostly sunny, with a high near 50. Southwest wind 7 to 10 mph.
Saturday Night:
Mostly Clear then Slight Chance Light Snow
Lo 28 °F
A slight chance of snow after 5am. Mostly clear, with a low around 28. West wind around 6 mph. Chance of precipitation is 20%.
Sunday:
Light Snow Likely
Hi 36 °F
Snow likely. Mostly cloudy, with a high near 36. North wind 5 to 8 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Sunday Night:
Slight Chance Light Snow then Mostly Clear
Lo 11 °F
A slight chance of snow before 9pm. Mostly clear, with a low around 11. Northwest wind around 8 mph. Chance of precipitation is 20%. New snow accumulation of less than half an inch possible.
Monday:
Mostly Sunny
Hi 25 °F
Mostly sunny, with a high near 25. Northwest wind around 7 mph.
Monday Night:
Mostly Clear
Lo 12 °F
Mostly clear, with a low around 12. Southwest wind around 5 mph.
Tuesday:
Chance Light Snow
Hi 39 °F
A chance of snow before 2pm, then a chance of rain between 2pm and 5pm, then a chance of rain and snow. Partly sunny, with a high near 39. South wind 5 to 9 mph. Chance of precipitation is 50%.
Tuesday Night:
Chance Rain And Snow then Rain And Snow Likely
Lo 32 °F
A chance of rain and snow before 8pm, then rain and snow likely. Cloudy, with a low around 32. Southwest wind around 8 mph. Chance of precipitation is 70%.
Wednesday:
Chance Light Rain
Hi 47 °F
A chance of rain before 2pm. Mostly sunny, with a high near 47. West wind around 8 mph. Chance of precipitation is 50%.
Wednesday Night:
Mostly Cloudy then Slight Chance Light Snow
Lo 31 °F
A slight chance of rain between 1am and 4am, then a slight chance of snow. Mostly cloudy, with a low around 31. Southwest wind around 6 mph.
Thursday:
Chance Light Rain
Hi 44 °F
A chance of rain. Mostly cloudy, with a high near 44. Southeast wind 5 to 8 mph. Chance of precipitation is 40%.
Thursday Night:
Light Rain Likely
Lo 32 °F
Rain likely before 2am, then rain and snow likely. Cloudy, with a low around 32. East wind around 9 mph.
NWS Hourly Forecast -
Today 4pm through Sun 3am
Issued by:
National Weather Service Boston / Norton, MA
Updated Fri Feb 27, 2026 2:35pm EST
4:00pm
Dew Pt 26°F
Wind Chill: 38°F
S 5 mphPrecip: 0%
5:00pm
Dew Pt 26°F
Wind Chill: 34°F
S 5 mphPrecip: 0%
6:00pm
Dew Pt 25°F
Wind Chill: 30°F
S 6 mphPrecip: 0%
7:00pm
Dew Pt 25°F
Wind Chill: 25°F
S 6 mphPrecip: 0%
8:00pm
Dew Pt 24°F
Wind Chill: 23°F
SW 7 mphPrecip: 0%
9:00pm
Dew Pt 24°F
Wind Chill: 21°F
SW 7 mphPrecip: 0%
10:00pm
Dew Pt 23°F
Wind Chill: 18°F
SW 7 mphPrecip: 0%
11:00pm
Dew Pt 22°F
Wind Chill: 19°F
SW 6 mphPrecip: 0%
12:00am
Dew Pt 22°F
Wind Chill: 18°F
SW 6 mphPrecip: 0%
1:00am
Dew Pt 21°F
Wind Chill: 16°F
S 6 mphPrecip: 0%
2:00am
Dew Pt 22°F
Wind Chill: 15°F
S 7 mphPrecip: 0%
3:00am
Dew Pt 22°F
Wind Chill: 16°F
S 6 mphPrecip: 0%
4:00am
Dew Pt 23°F
Wind Chill: 16°F
S 6 mphPrecip: 0%
5:00am
Dew Pt 23°F
Wind Chill: 16°F
S 6 mphPrecip: 0%
6:00am
Dew Pt 23°F
Wind Chill: 15°F
S 7 mphPrecip: 0%
7:00am
Dew Pt 24°F
Wind Chill: 15°F
S 8 mphPrecip: 0%
8:00am
Dew Pt 27°F
Wind Chill: 21°F
S 8 mphPrecip: 1%
9:00am
Dew Pt 30°F
Wind Chill: 26°F
S 8 mphPrecip: 2%
10:00am
Dew Pt 32°F
Wind Chill: 33°F
S 8 mphPrecip: 2%
11:00am
Dew Pt 33°F
Wind Chill: 38°F
S 9 mphPrecip: 3%
12:00pm
Dew Pt 34°F
Wind Chill: 41°F
S 9 mphPrecip: 3%
1:00pm
Dew Pt 35°F
Wind Chill: 42°F
S 10 mphPrecip: 3%
2:00pm
Dew Pt 35°F
Wind Chill: 45°F
S 9 mphPrecip: 4%
3:00pm
Dew Pt 36°F
Wind Chill: 45°F
S 9 mphPrecip: 4%
4:00pm
Dew Pt 36°F
Wind Chill: 46°F
SW 7 mphPrecip: 3%
5:00pm
Dew Pt 35°F
Wind Chill: 42°F
SW 7 mphPrecip: 3%
6:00pm
Dew Pt 34°F
Wind Chill: 39°F
SW 6 mphPrecip: 3%
7:00pm
Dew Pt 34°F
Wind Chill: 38°F
SW 5 mphPrecip: 0%
8:00pm
Dew Pt 33°F
Wind Chill: 37°F
SW 5 mphPrecip: 0%
9:00pm
Dew Pt 32°F
Wind Chill: 34°F
W 5 mphPrecip: 0%
10:00pm
Dew Pt 31°F
Wind Chill: 32°F
W 5 mphPrecip: 0%
11:00pm
Dew Pt 30°F
Wind Chill: 31°F
W 5 mphPrecip: 1%
12:00am
Dew Pt 28°F
Wind Chill: 30°F
W 3 mphPrecip: 1%
1:00am
Dew Pt 27°F
Wind Chill: 29°F
NW 3 mphPrecip: 1%
2:00am
Dew Pt 26°F
Wind Chill: 28°F
NW 3 mphPrecip: 2%
3:00am
Dew Pt 25°F
Wind Chill: 25°F
NW 5 mphPrecip: 2%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 271933
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
233 PM EST Fri Feb 27 2026
.WHAT HAS CHANGED...
Increased confidence in patchy fog across the region tonight,
especially in low-lying areas. Less snowfall expected Sunday
with a drier cold front. Looking warmer and wetter next week
with a chance for precipitation during the mid to late week
timeframe.
&&
.KEY MESSAGES...
- Patchy fog tonight and warmer Saturday
- Cold front brings a period of accumulating snow on Sunday. A
very cold Arctic airmass follows in its wake.
- Warmer and unsettled next week with multiple chances for
precipitation starting Tuesday into Wednesday.
&&
.DISCUSSION...
Key Message 1...Patchy fog tonight and warmer Saturday.
High pressure overhead will continue shifting east heading into the
start of the weekend. Southerly to southwesterly winds will persist
across southern New England with sea breezes remaining possible
through the rest of this afternoon. Low level temperatures climb
above 0C tonight in the midst of WAA from light southerly to
southwesterly flow. Higher dewpoints will be advected in as well,
shrinking dew point depressions and increasing the chance for patchy
fog across the region, especially amidst all the snow on the ground.
Guidance has continued to trend up the chance for patchy fog across
southern New England tonight, with the highest chances in low-lying
areas. Lows tonight will be mostly in the 20s and upper teens.
The warming trend overnight will continue through Saturday as
southwesterly flow continues and 925 mb temperatures remain around 2-
4C. 850 mb temperatures will remain above 0C through the afternoon
as well. A front passing through Saturday will shift winds more NW
heading into Saturday night. Latest guidance does not indicate much
in the way of a spot shower or two for this frontal passage as
moisture is lacking and forcing is weak (notably, lapse rates are
quite low). Lows for Saturday night will be similar to tonight's,
falling mostly in the 20s across the region ahead of a more
significant cold front Sunday.
Key Message 2...Cold front brings a period of accumulating snow on
Sunday. A very cold Arctic airmass follows in its wake.
A strong cold front moves through on Sunday and brings a period of
snow from W-E late Sunday afternoon into the evening. Trend in
guidance has been to lower overall moisture and QPF amounts.
Notably, models have shown a sharp decrease in 700-800mb RH and PWAT
values along and ahead of the front. These changes result in a
largely unsaturated DGZ with poor snowflake growth and lower overall
totals Sunday afternoon. The NBM has followed suit with probs for 1"
or greater dropping from 40-50% areawide to around 30-45%. Thus,
have gone ahead and lowered forecast snowfall totals with 1-3 inches
possible mainly along and north of the Mass Pike and lesser amounts
of up to an inch elsewhere. Still think a reasonable worst-case
scenario is a 2-4 inch event if QPF trends higher. Higher-end snow
totals should remain confined to higher terrain as temperatures
become more marginal closer to the coast.
Bigger story with the frontal passage will be a sharp drop in
temperatures Sunday night. Highs start in the 30s early in the day,
then drop into the upper 20s and upper teens by 00z Monday. Core of
the Arctic airmass moves through Sunday night with 850mb temps
falling into the mid teens below zero Celsius. No surprise that it
will be a cold night with lows falling into the single digits and
lower teens for most of the region. Well mixed boundary layer will
keep most spots from realizing the coldest possible temps. Exception
will be in interior valleys where the boundary layer is able to
decouple and increase radiational cooling. In these spots, lows may
even fall to near or just below zero! Temps will be slow to rebound
Monday even under mostly clear skies. Highs range from the lower 20s
at elevations in the interior to the upper 20s to near 30 across the
coastal plain. Low temperatures Monday night bottom out in the
single digits once again. Winds will be elevated, but do not look as
strong as previous cold air advection events as the LLJ will likely
only be 20-25 kts. Still, could see impactful wind chills Monday
morning. Most locations will see wind chill values around or just
below zero, with the lowest values across elevated portions of the
interior.
Key Message 3... Warmer and unsettled next week with multiple chances
for precipitation starting Tuesday into Wednesday.
Upper air pattern over the CONUS becomes more zonal through the
middle of next week with a strengthening Pacific Jet. Embedded
disturbances bring multiple chances for precipitation mid week.
Pattern becomes more amplified late next week with a strengthening
southeast ridge. At the surface, these changes result in
temperatures warming back to seasonal averages Tuesday through the
rest of next week. Precip type will be a bit less straightforward
than with the last few events as highs warm into the upper 30s and
low 40s.
Chances of precipitation arrive with several weak waves of
shortwave energy moving in from the Great Lakes and Ohio River
Valley during the middle to end of next week. Given the cold air in
place ahead of the first wave on Wednesday, any WAA will lead to a
messy mixed precipitation setup with anything from snow to sleet to
freezing rain. The active pattern may continue for much of the week
as a warm front stalls near Southern New England on its northward
journey. NBM has a 30-50% chance of an inch of QPF for this
timeframe so we could see hydrologic impacts but confidence is low
at this time.
&&
.AVIATION /19Z FRIDAY THROUGH WEDNESDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
18z TAF update...
Rest of Today...High Confidence.
VFR. Some variable winds this afternoon near the eastern coastal
areas, but all should become more SW by around 21z today. Winds
remain light under 10 kt.
Tonight...Moderate Confidence.
VFR with areas of MVFR possible in BR over the CT Valley, RI,
and into NE MA. Light SW winds, becoming calm in some locations.
Saturday...High Confidence.
VFR. Light SW-ly winds 5-10 knots. Increasing mid-level
cloudiness into the afternoon.
Saturday Night...Moderate Confidence.
VFR with areas of MVFR and some IFR possible. Light winds shift
more NW. Chance for some precipitation increases heading into
Sunday morning.
KBOS Terminal...High confidence in TAF.
Sea breeze continuing this afternoon before shifting more S-ly
around 00z this evening. Low chance for MVFR BR later tonight,
so not included in TAF at this time.
KBDL Terminal...Moderate confidence in TAF.
VFR outside of a chance for MVFR visbys in BR early Sat
morning. Moderate confidence in lower ceilings at that same
time.
Outlook /Sunday through Wednesday/...
Sunday: Mainly VFR, with local IFR possible. Chance SN, chance
RA.
Sunday Night: VFR. Breezy.
Monday: VFR.
Monday Night: VFR. Slight chance SN.
Tuesday: VFR. Breezy. Chance RA, slight chance SN.
Tuesday Night: Mainly MVFR, with areas IFR possible. Breezy. RA
likely.
Wednesday: Mainly VFR, with local MVFR possible. Chance RA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Saturday Night...High confidence.
Small Craft Advisory dropped over the outer waters as seas
continue to diminish tonight below 5 ft. Winds generally below
15 knots, with the exception of the occasional gust up to 20
knots over the far northeast waters later tonight into Saturday
morning. S to SE winds shift more N Saturday night into Sunday
morning.
Outlook /Sunday through Wednesday/...
Sunday: Winds less than 25 kt. Chance of rain, chance of snow.
Sunday Night: Low risk for Small Craft Advisory winds with
gusts up to 20 kt. Areas of seas approaching 5 ft.
Monday: Winds less than 25 kt. Seas locally approaching 5 ft.
Monday Night: Winds less than 25 kt.
Tuesday: Winds less than 25 kt. Chance of rain, slight chance
of snow.
Tuesday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas locally approaching 5 ft. Rain likely.
Wednesday: Winds less than 25 kt. Areas of seas approaching
5 ft. Chance of rain.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.
&&
$$
DISCUSSION...Hrencecin/FT
AVIATION...Hrencecin
MARINE...Hrencecin/FT
Radar [‒] Radar [+]
Radar images courtesy Weather Underground / Intellicast.
Satellite [‒] Satellite [+]
Satellite images courtesy Weather Underground / Intellicast.
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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:
0.01 in
Rain Today:
0.00 in
Thursday:
0.01 in
February:
1.26 in
2026
Daily Extremes [‒] Daily Extremes [+]
1:17pm
36.1°F
High today:
12:00am
25.2°F
Low today:
2:28pm
30.4°F
High Thursday:
7:11am
16.2°F
Low Thursday:
12:00am
25.2°F
Low wind chill today:
7:11am
16.2°F
Low wind chill Thursday:
1:17pm
33.3°F
High dew pt today:
11:56pm
20.7°F
High dew pt Thursday:
None
Wind gust today:
None
Wind gust Thursday:
Alerts / Advisories [‒] Alerts / Advisories [+]
No alerts/warnings active for Southeast Middlesex County.
Sun / Moon [‒] Sun / Moon [+]
First Light:
6:11am
Sunrise:
6:39am
Sunset:
5:19pm
Twilight ends:
5:47pm
Daylight length:
10 hours 39 minutes
Phase:
Waxing Gibbous (82%)
Moon set:
8:18am
Moon rise:
9:38pm