Lexington, Massachusetts, USA
35.1°F
1.7°C
Cold
Few Clouds
Today: Hi 62 °F
Tonight: Lo 42 °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
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Fri May 8, 2026 6:28am EDT
- No significant weather concerns are expected today, though a few brief afternoon showers are possible.
- Mother's Day weekend looks split, with widespread showers and cooler temperatures Saturday followed by somewhat warmer and drier conditions Sunday.
- Another round of unsettled weather is possible Sunday night into Monday, followed by a brief drying trend midweek with temperatures remaining below normal.
Partly Sunny then Isolated Rain Showers
Hi 62 °F
Isolated rain showers after 1pm. Partly sunny, with a high near 62. West wind 5 to 12 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Mostly Clear
Lo 42 °F
Mostly clear, with a low around 42. West wind 2 to 10 mph.
Rain Showers Likely
Hi 61 °F
Rain showers likely after 9am. Mostly cloudy, with a high near 61. South wind 3 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Rain Showers
Lo 48 °F
Rain showers before 5am. Mostly cloudy, with a low around 48. South wind 6 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly Sunny
Hi 72 °F
Mostly sunny, with a high near 72. Southwest wind 6 to 10 mph.
Rain Showers Likely
Lo 46 °F
Rain showers likely after 8pm. Mostly cloudy, with a low around 46. Northwest wind 3 to 8 mph. Chance of precipitation is 60%.
Rain Showers
Hi 56 °F
Rain showers. Mostly cloudy, with a high near 56. Northwest wind around 6 mph. Chance of precipitation is 80%.
Chance Rain Showers
Lo 43 °F
A chance of rain showers. Mostly cloudy, with a low around 43. Northwest wind 3 to 7 mph. Chance of precipitation is 40%.
Slight Chance Rain Showers
Hi 60 °F
A slight chance of rain showers. Mostly sunny, with a high near 60. Northwest wind around 9 mph.
Partly Cloudy
Lo 43 °F
Partly cloudy, with a low around 43. Northwest wind 3 to 8 mph.
Mostly Sunny
Hi 63 °F
Mostly sunny, with a high near 63. Southwest wind 3 to 8 mph.
Chance Rain Showers
Lo 45 °F
A chance of rain showers after 7pm. Mostly cloudy, with a low around 45. South wind 3 to 7 mph. Chance of precipitation is 40%.
Chance Rain Showers
Hi 62 °F
A chance of rain showers. Partly sunny, with a high near 62. East wind 3 to 9 mph. Chance of precipitation is 50%.
Chance Rain Showers
Lo 45 °F
A chance of rain showers. Mostly cloudy, with a low around 45. Northeast wind around 7 mph.
Issued by:
National Weather Service Boston / Norton, MA
Updated Fri May 8, 2026 6:28am EDT

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000
FXUS61 KBOX 080648
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
248 AM EDT Fri May 8 2026
.WHAT HAS CHANGED...
While no significant changes have been made to the forecast, cannot
rule out brief pop-up showers this afternoon, followed by widespread
rainfall Saturday. While drier on Mother's Day, there remains a low
chance of an afternoon shower or thunderstorm, though confidence
remains low in terms of the areal coverage. Unsettled once again
late Sunday night into Monday, followed with below normal
temperatures early next week.
&&
.KEY MESSAGES...
- No significant weather concerns are expected today, though a
few brief afternoon showers are possible.
- Mother's Day weekend looks split, with widespread showers and
cooler temperatures Saturday followed by somewhat warmer and
drier conditions Sunday.
- Another round of unsettled weather is possible Sunday night
into Monday, followed by a brief drying trend midweek with
temperatures remaining below normal.
&&
.DISCUSSION...
KEY MESSAGE 1...No significant weather concerns are expected today,
though a few brief afternoon showers are possible.
While high pressure builds offshore of the Carolinas, a surface
trough and fairly strong mid-level shortwave move through SNE this
afternoon. Despite this forcing, the airmass remains considerably
drier in the wake of Thursday morning's cold front passage. PWAT
values are only around 0.4-0.6 inches per the 00z HREF, indicating
limited moisture availability. As a result, expect mainly diurnal
driven showers this afternoon, with the greatest coverage across
interior MA where PoPs range from 25-40 percent. Elsewhere, PoPs are
generally 15-25 percent between roughly 2-8 PM. Not all locations
will see rainfall, and any showers that do develop should be brief
and light. Temperatures today will be seasonably cool, with highs
running a few degrees below climatological normals in the upper 50s
to lower 60s. Dry weather returns tonight, though clouds will
gradually increase from west to east ahead of a more widespread
rainfall event expected Saturday. Overnight lows fall into the 30s
and 40s, coldest across interior MA where some locations dip into
the mid 30s, while coastal areas remain milder in the mid 40s.
KEY MESSAGE 2...Mother's Day weekend looks split, with widespread
showers and cooler temperatures Saturday followed by somewhat warmer
and drier conditions Sunday.
Guidance continues to support unsettled conditions developing by
late Saturday morning into the afternoon as an elevated warm front
and accompanying 850mb shortwave move through SNE. Temperatures are
somewhat below normal with highs in the upper 50s to lower 60s. Wind
direction aloft are SW, this helps to increase humidity, PWATs too
are increasing, 0.8-1.0 inches per the 00z HREF, which is more or
less the climatological normal for the first half of May, promotes
widespread beneficial rainfall. 00z GEFS indicate a moderate
probability of 50 percent for totals to exceed 0.5 inches. ECMWF ENS
show something similar, with an axis of moderate-high probabilities
(60-80 percent) of 0.5 inches across coastal RI and SE MA. This does
align somewhat with HREF, currently thinking widespread amounts of
0.3-0.6 inches with locally higher amounts possible in any convective
showers. And at this time, there are no concerns with flooding.
Conditions improve heading into Sunday as subtle mid-level height
rises support quieter and milder condition's for Mother's Day. While
SW to WSW flow persists, a notably drier airmass is not expected to
move into SNE. In fact, dew points climb into the low to mid 50s,
making it feel somewhat more humid compared to the much drier
conditions observed Thursday and Friday. Given the lingering
moisture and embedded shortwave energy within the flow, cannot rule
out a passing afternoon shower or thunderstorm as a few hundred J/kg
of CAPE may develop. That said, Sunday does not appear to be a
washout, though those with outdoor plans should remain weather
aware. Afternoon highs rise into the low to mid 70s.
KEY MESSAGE 3...Another round of unsettled weather is possible
Sunday night into Monday, followed by a brief drying trend midweek
with temperatures remaining below normal.
Attention then turns to Sunday evening into early Monday as another
mid-level trough and embedded shortwave energy moves through SNE.
This likely supports development of weak surface low pressure south
of the region, bringing another round of rain during this timeframe.
While details regarding exact timing and rainfall amounts remain
uncertain, the overall signal for unsettled conditions is
increasing. A brief drying trend is possible Tuesday into Wednesday
as high pressure attempts to build S and W of the region.
Temperatures trend back below climatological normal early next week,
with highs mainly in the 50s Monday and upper 50s to lower 60s
Tuesday and Wednesday.
&&
.AVIATION /06Z FRIDAY THROUGH TUESDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
06z TAF Update:
Today...High confidence.
VFR. SKC become SCT-BKN, with 050-080 ceilings by 15z. Lower chances
for a rouge shower mainly across interior MA, between 19-23z, like
KORH. Otherwise a dry day. WNW wind 10-14 kt, gusting 20-25kt.
Tonight...High confidence.
VFR. Mid-level clouds increasing W to E overnight. WSW to SW wind
less than 5 kt.
Saturday...High confidence.
Low-end VFR early, MVFR by late morning into early afternoon with
widespread RA developing. Cannot rule out embedded thunder at this
time, terminals along the southern coast may have the greatest
chance for rumbles. S wind increasing into the afternoon, gusts up
to 20-25 kt possible.
KBOS Terminal...High confidence in TAF.
KBDL Terminal...High confidence in TAF.
Outlook /Saturday Night through Tuesday/...
Saturday Night: Mainly VFR, with local IFR possible. Breezy.
Chance SHRA.
Sunday: VFR. Breezy. Slight chance SHRA.
Sunday Night: Mainly VFR, with local IFR possible. Chance SHRA.
Monday: Mainly VFR, with local IFR possible. SHRA likely.
Monday Night: Mainly VFR, with local MVFR possible. Slight
chance SHRA.
Tuesday: VFR. Breezy. Slight chance SHRA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Saturday...High confidence.
A weak frontal passage this afternoon produce SW gusts 20 to 25 kt
for the nearshore waters off the south coast of MA & RI, followed by
gust less than 15 kt tonight. Seas today into tonight are 2 to 4 ft.
An area of low pressure tracks well inland on Saturday, a warm front
lifting north during the day and periods of rain and embedded
thunderstorms. A wind shift to the S-SSE and increasing wind speeds
15 to 20 kt and gust 25+ kt. Seas build from S to N as well
throughout the day 4 to 7 ft. Due to these conditions, likely will
need a Small Craft Advisory come Saturday afternoon.
Outlook /Saturday Night through Tuesday/...
Saturday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft. Rain showers, isolated
thunderstorms, patchy fog.
Sunday: Winds less than 25 kt. Areas of seas approaching 5 ft.
Sunday Night: Winds less than 25 kt. Seas locally approaching
5 ft. Chance of rain showers.
Monday: Winds less than 25 kt. Rain showers.
Monday Night: Winds less than 25 kt. Seas locally approaching
5 ft. Chance of rain showers.
Tuesday: Winds less than 25 kt. Areas of seas approaching 5 ft.
Slight chance of rain showers.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.
&&
$$
DISCUSSION...Dooley
AVIATION...Dooley
MARINE...Dooley
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 2 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
Thursday:
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 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:
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:
Waning Gibbous (82%)
Moon set:
8:18am
Moon rise:
9:38pm