Lexington, Massachusetts, USA
35.1°F
1.7°C
Cold
Light rain, Mist, Overcast
This Afternoon: Hi 53 °F
Tonight: Lo 50 °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 Saturday: 0.00 in
Visibility: 2½ miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sun May 24, 2026 1:33pm EDT
- Steady rain Sunday afternoon transitions to drizzle and fog overnight.
- Showers Monday morning with brief downpours and a thunderstorm possible, transitions to drier weather in the mid to late afternoon from west to east. Warmer and more humid Monday with partial sunshine late.
- Above normal temperatures for the middle of next week before trending closer to normal late next week. A couple periods of showers possible, but no washouts expected.
Rain Showers
Hi 53 °F
Rain showers and patchy fog. Cloudy, with a high near 53. East wind around 9 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Rain Showers
Lo 50 °F
Rain showers and patchy fog. Cloudy, with a low around 50. East wind 2 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Rain Showers
Hi 71 °F
Rain showers and patchy fog before 3pm. Mostly cloudy, with a high near 71. West wind 2 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Mostly Cloudy
Lo 56 °F
Mostly cloudy, with a low around 56. West wind around 5 mph.
Mostly Sunny
Hi 81 °F
Mostly sunny, with a high near 81. West wind 2 to 8 mph.
Mostly Clear
Lo 63 °F
Mostly clear, with a low around 63. Southwest wind around 7 mph.
Sunny then Chance Rain Showers
Hi 86 °F
A chance of rain showers after 1pm. Sunny, with a high near 86. West wind 6 to 10 mph. Chance of precipitation is 30%.
Partly Cloudy
Lo 58 °F
Partly cloudy, with a low around 58. Northwest wind 6 to 9 mph.
Chance Rain Showers
Hi 73 °F
A chance of rain showers. Mostly sunny, with a high near 73. North wind around 8 mph. Chance of precipitation is 30%.
Partly Cloudy
Lo 53 °F
Partly cloudy, with a low around 53. North wind 3 to 7 mph.
Chance Rain Showers
Hi 71 °F
A chance of rain showers after 11am. Mostly sunny, with a high near 71. Northwest wind 3 to 9 mph. Chance of precipitation is 30%.
Slight Chance Rain Showers
Lo 51 °F
A slight chance of rain showers. Partly cloudy, with a low around 51. West wind around 7 mph.
Chance Rain Showers
Hi 69 °F
A chance of rain showers. Mostly sunny, with a high near 69. West wind 6 to 9 mph. Chance of precipitation is 30%.
Partly Cloudy
Lo 51 °F
Partly cloudy, with a low around 51. Northwest wind 3 to 7 mph.
Issued by:
National Weather Service Boston / Norton, MA
Updated Sun May 24, 2026 1:33pm EDT

E 9 mph
E 9 mph
E 9 mph
E 8 mph
E 8 mph
E 8 mph
E 7 mph
E 7 mph
E 7 mph
E 6 mph
E 5 mph
E 5 mph
E 3 mph
E 3 mph
NE 2 mph
NE 2 mph
NE 2 mph
NE 2 mph
W 2 mph
W 3 mph
SW 3 mph
SW 8 mph
W 9 mph
W 9 mph
W 9 mph
W 9 mph
W 9 mph
W 5 mph
W 3 mph
W 3 mph
W 3 mph
W 3 mph
W 3 mph
W 3 mph
NW 3 mph
NW 3 mph
000
FXUS61 KBOX 241759
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
159 PM EDT Sun May 24 2026
.WHAT HAS CHANGED...
Risk for showers with brief heavy rain and an isolated
thunderstorm possible Monday morning, lingering into early
afternoon across RI and eastern MA.
&&
.KEY MESSAGES...
- Steady rain Sunday afternoon transitions to drizzle and fog
overnight.
- Showers Monday morning with brief downpours and a thunderstorm
possible, transitions to drier weather in the mid to late
afternoon from west to east. Warmer and more humid Monday with
partial sunshine late.
- Above normal temperatures for the middle of next week before trending
closer to normal late next week. A couple periods of showers
possible, but no washouts expected.
&&
.DISCUSSION...
KEY MESSAGE 1...Steady rain Sunday afternoon transitions to
drizzle and fog overnight.
Large warm frontal rain shield over SNE this afternoon, being driven
by a modest 35-45 kt low level SE jet off the Atlantic. This jet is
resulting in breezy conditions along the coast, with ESE winds
gusting to 20-25 mph at times. Winds will slacken later this evening
and overnight, as this jet exits offshore overnight. Thus, steady
rains this afternoon and evening will transition to more of a spotty
light rain/drizzle overnight. As a warm front approaches from the
south, could see some areas of dense fog develop tonight.
KEY MESSAGE 2...Showers Monday morning with brief downpours and a
thunderstorm possible, transitions to drier weather in the mid to
late afternoon from west to east. Warmer and more humid Monday with
partial sunshine late.
Warm front lifts north through the region Monday morning. Warm
sector airmass will be accompanied by dew pts in the 60s, so it will
feel warmer and more humid Monday. Short wave trough and
accompanying cold front move through the region later in the morning
and into the afternoon, from west to east. Modest synoptic and
frontal scale forcing, coupled with copious deep layer moisture (dew
pts in the 60s and PWATs 1.75-2.0 inches) along with some
instability, will yield showers with embedded heavier rain/downpours
and a low risk of an isolated thunderstorm. Not expecting any
flooding (other than nuisance, minor urban/street) but more
beneficial rains, with an additional 0.35 to 0.75 inches of rainfall
tonight into Monday. Isolated higher amounts possible if any
thunderstorms develop. Good column drying behind the FROPA 18z-00z
from west to east, with PWATs crashing and yielding clouds giving
way to breaks of sunshine from west to east mid to late afternoon.
This should support highs of 70-75 and with dew pts in the 60s,
it will feel considerably warmer than previous days.
KEY MESSAGE 3...Above normal temperatures for the middle of next
week before trending closer to normal late next week. A couple
periods of showers possible, but no washouts expected.
Not much change to the expected overall mid level synoptic pattern
from yesterday. However, considerable differences remain between the
deterministic models after Wednesday. Thus, have low confidence in
the details late next week into next weekend. Will be relying more
on ensembles and focusing more on the trends until greater clarity
develops.
Expecting well above normal temperatures to be in place Tuesday into
Wednesday. While we should be on the backside of a cold front for
Thursday, there are signals in the NAEFS and NationalBlend that the
lower temperatures for Thursday could still turn out to be slightly
above normal for late May, with the near to slightly below normal
temperatures hold off until Friday into next weekend. Given the
uncertainty at this time range, anticipating this timing part of the
forecast is likely to change over the coming week.
Rainfall-wise, it is very difficult to pin down specific windows of
time when the risk for showers is greatest. We can't seem to get
sufficient moisture aligned with lift. The synoptic pattern suggests
that Wednesday still has potential to be one of those periods as a
cold front should be crossing our region. However, the ensembles
started to dry out the atmosphere a little more, meaning that shower
coverage could be less than previously anticipated. For Thursday,
the cooler conditions means increased relative humidity, but there
is not much organized lift to focus it. Perhaps colder air aloft
could trigger diurnal showers, but the timing of this colder air is
questionable. These issues continue right into next weekend with the
potential approach of a low pressure. Again, anticipating this
aspect of the forecast is likely to undergo changes as this week
progresses.
&&
.AVIATION /18Z SUNDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
18Z update...
This afternoon and tonight: High confidence.
MVFR/IFR in steady light rain this afternoon, continues to lower to
widespread IFR this evening and tonight, with marginal IFR/LIFR at
times in drizzle/spotty light rain and areas of dense fog. Marginal
LLWS this afternoon and evening from low level SE jet of 35-45 kt,
ends after 00z-03z west to east as low level jet moves offshore.
This jet will result in ENE surface winds gusting up to 20-30 kt at
times at coastal terminals until 00z-03z, then slackening
thereafter.
Monday: High confidence in trends. Moderate confidence in
exact timing.
LIFR/LIFR at 12z Monday in drizzle/areas of rain and fog. As cold
front approaches from the west, showers become widespread along with
embedded heavier rain and low prob of -TSRA. After 15z LIFR/IFR
begin to lift to IFR/MVFR and eventually VFR 18z-00z from west to
east. SSW winds in the morning become west in the afternoon with the
FROPA.
Monday night: High confidence.
Light west wind becoming NNW late. Any lingering IFR/MVFR over Cape
Cod and Islands at 00z, will improve to VFR with the wind shift from
SW to west and eventually NNW overnight. Low prob of MVFR in patchy
fog overnight.
KBOS...High confidence in TAF. Marginal LLWS (WS020 15040KT) 00z-03z
Monday.
KBDL...High confidence in TAF. Marginal LLWS (WS020 14040KT) 00z-03z
Monday.
Outlook /Tuesday through Friday/...
Tuesday through Tuesday Night: VFR.
Wednesday: VFR. Breezy. Slight chance SHRA.
Wednesday Night: VFR.
Thursday: VFR. Slight chance SHRA.
Thursday Night: VFR.
Friday: VFR. Slight chance SHRA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
130 PM update...
Sunday afternoon and night...
SCAs remain in effect for most waters, with east winds gusting up to
20-30 kt at times Sunday afternoon and evening, then diminishing 8
pm to 1 am from west to east Sunday night. Rain and fog lowering
vsby 1 to 3 miles this afternoon, then less than 1 mile at times
tonight in areas of fog and drizzle/light rain. The long easterly
fetch of winds will build seas 5-8 ft across the ocean waters of
RI/MA.
Monday and Mon night...
Showers with embedded heavy rain, areas of dense fog and low risk of
an isolated thunderstorm in the morning, lingering into the
early/mid afternoon for the southern waters. Then followed by
drier/improving weather 2-5 pm from northwest to southeast (later
south of the islands). Wind shift from SSW in the morning, to west
in the afternoon and evening, then NNW overnight.
Outlook /Tuesday through Friday/...
Tuesday: Winds less than 25 kt. Areas of seas approaching 5 ft.
Tuesday Night: Winds less than 25 kt. Seas locally approaching
5 ft.
Wednesday: Winds less than 25 kt. Seas locally approaching
5 ft. Slight chance of rain showers.
Wednesday Night: Winds less than 25 kt.
Thursday: Winds less than 25 kt. Slight chance of rain showers.
Thursday Night: Winds less than 25 kt.
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 until 2 AM EDT Monday for ANZ231.
Small Craft Advisory until 5 AM EDT Monday for ANZ232>235-237.
Small Craft Advisory from 5 PM this afternoon to 8 PM EDT
Monday for ANZ250.
Small Craft Advisory until 8 PM EDT Monday for ANZ254>256.
&&
$$
DISCUSSION...Belk/Nocera
AVIATION...Belk/Nocera
MARINE...Belk/Nocera
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 1 Low
Current (Measured): 0.0 None
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
Saturday:
0.01 in
May:
1.26 in
2026
1:17pm
36.1°F
High today:
12:00am
25.2°F
Low today:
2:28pm
30.4°F
High Saturday:
7:11am
16.2°F
Low Saturday:
12:00am
25.2°F
Low wind chill today:
7:11am
16.2°F
Low wind chill Saturday:
1:17pm
33.3°F
High dew pt today:
11:56pm
20.7°F
High dew pt Saturday:
None
Wind gust today:
None
Wind gust Saturday:
No alerts/warnings active for Southeast Middlesex County.
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