Lexington, Massachusetts, USA
35.1°F
1.7°C
Cold
Light rain, Overcast
This Afternoon: Hi 69 °F
Tonight: Lo 59 °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 Monday: 0.00 in
Visibility: 7 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Tue Jul 7, 2026 10:57am EDT
- Periods of rain, heavy at times continues through much of the day today. Chance for thunderstorms and isolated flooding, mainly across the Cape and Islands.
- Mainly dry with a warming trend through midweek followed by an increased chance for scattered showers and thunderstorms later in the week.
Patchy Fog
Hi 69 °F
Rain showers and patchy fog before 2pm, then patchy fog and showers and thunderstorms. Cloudy, with a high near 69. Northeast wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Patchy Fog
Lo 59 °F
Patchy fog and showers and thunderstorms likely. Cloudy, with a low around 59. Northeast wind 6 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Slight Chance Rain Showers then Partly Sunny
Hi 79 °F
A slight chance of rain showers before 8am. Partly sunny, with a high near 79. Northeast wind around 6 mph. Chance of precipitation is 20%.
Mostly Clear
Lo 63 °F
Mostly clear, with a low around 63. South wind around 6 mph.
Mostly Sunny
Hi 90 °F
Mostly sunny, with a high near 90. Southwest wind 6 to 9 mph.
Partly Cloudy
Lo 69 °F
Partly cloudy, with a low around 69. Southwest wind 6 to 9 mph.
Partly Sunny then Chance Showers And T-Storms
Hi 91 °F
A chance of showers and thunderstorms between 2pm and 5pm, then showers and thunderstorms likely. Partly sunny, with a high near 91. West wind around 8 mph. Chance of precipitation is 60%.
Chance Showers And T-Storms
Lo 67 °F
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 67. Northwest wind around 5 mph. Chance of precipitation is 50%.
Mostly Sunny
Hi 86 °F
Mostly sunny, with a high near 86. Northeast wind around 7 mph.
Mostly Clear
Lo 64 °F
Mostly clear, with a low around 64. North wind 2 to 6 mph.
Sunny
Hi 86 °F
Sunny, with a high near 86. Northeast wind 3 to 7 mph.
Partly Cloudy then Slight Chance Rain Showers
Lo 65 °F
A slight chance of rain showers after 5am. Partly cloudy, with a low around 65. South wind around 7 mph.
Chance Rain Showers
Hi 87 °F
A chance of rain showers. Mostly sunny, with a high near 87. South wind 6 to 10 mph. Chance of precipitation is 40%.
Chance Rain Showers
Lo 67 °F
A chance of rain showers before 1am. Partly cloudy, with a low around 67. West wind 6 to 9 mph.
Issued by:
National Weather Service Boston / Norton, MA
Updated Tue Jul 7, 2026 10:57am EDT

NE 9 mph
NE 10 mph
NE 10 mph
NE 10 mph
NE 9 mph
NE 9 mph
NE 9 mph
NE 8 mph
NE 8 mph
NE 7 mph
NE 7 mph
NE 6 mph
N 6 mph
N 6 mph
N 6 mph
N 6 mph
N 6 mph
N 6 mph
N 6 mph
N 6 mph
N 6 mph
N 6 mph
NE 6 mph
NE 6 mph
NE 6 mph
NE 6 mph
NE 6 mph
NE 6 mph
E 5 mph
E 5 mph
E 5 mph
SE 5 mph
S 3 mph
S 3 mph
S 3 mph
S 5 mph
000
FXUS61 KBOX 071103
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
703 AM EDT Tue Jul 7 2026
.WHAT HAS CHANGED...
Cancelled the flood watch for CT and lowered
rainfall totals across Connecticut and Central Massachusetts to 1 to
2 inches. Otherwise, no significant changes to the forecast
&&
.KEY MESSAGES...
- Periods of rain, heavy at times continues through much of the day
today. Chance for thunderstorms and isolated flooding, mainly across
the Cape and Islands.
- Mainly dry with a warming trend through midweek followed by an
increased chance for scattered showers and thunderstorms later in
the week.
&&
.DISCUSSION...
KEY MESSAGE 1...Periods of rain, heavy at times continues through
much of the day today. Chance for thunderstorms and isolated
flooding, mainly across the Cape and Islands.
Theme of the last 12 hours has been to reduce the scope and
intensity of the flooding threat for much of the area. That being
said, we cannot fully rule out at least isolated instances of
flooding through this afternoon, especially across RI and much of
Eastern MA. Current radar shows areas of tropical rain rates
offshore in the higher PWAT airmass. Further north, it's a mostly
stratiform cool-season type rainfall regime with cloud tops <15kft
and KDP values <1.0 db. As a result, rain totals have, so far,
underperformed across much of Southern New England. Environment
becomes increasingly favorable for heavy rain into the early morning
hours as a 925 mb LLJ increases to 30kts around weak low pressure
and advects higher K-values northward. BUFKIT soundings across Rhode
Island and SE MA show warm cloud depths approaching 13kft and PWAT
values increasing to 2.00" in the predawn hours. Thus, thinking the
highest chance for flooding will be in these areas. Looking like a
mostly beneficial rainfall event elsewhere with much of the CWA
experiencing D1-D2 drought conditions. Rainfall totals between 1-3"
are still expected over much of southern New England, with lighter
totals expected closer to the NH border. Locally higher totals
between 2-4" are possible parts of RI, and SE MA. Even with the
reduction in QPF among guidance, a chance for training showers and
thunderstorms means the flood watch will remain in effect across CT,
RI, and SE MA.
Rainy conditions continue through much of the day today mainly in
eastern MA and RI as the low pressure continues northeastward and
its associated shortwave moves east from the Great Lakes. The bulk
of the heavy rain is expected to remain offshore The low passes
offshore overnight with the upper level shortwave moving over Maine,
and high pressure to the north continues spreading southward over
southern New England as it departs. Showers may persist into
overnight across eastern MA and the Islands, but these are not
expected to be nearly as impactful as this morning's rainfall.
KEY MESSAGE 2...Mainly dry with a warming trend through midweek
followed by an increased chance for scattered showers and
thunderstorms later in the week.
Ridging builds across the eastern CONUS Wednesday and Thursday
allowing for a warming and drying trend. Closer to the surface, 925mb
temperatures rise to near 20C, allowing for surface
temperatures to begin to creep up above seasonable norms...
likely near 90 across most of southern New England Wednesday and
Thursday. Another shortwave trough and cold front pushing
through sometime Thursday may bring chances for showers and
thunderstorms Friday. Depending on the timing of the FROPA,
showers could linger into Friday. Guidance currently shows FROPA
sometime later Thursday and well after peak heating. Future
forecasts will monitor the threat for convection as we get
closer to the late week period.
&&
.AVIATION /12Z TUESDAY THROUGH SATURDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
12Z TAF Update...
Today...Moderate confidence.
Any lingering VFR conditions N of ORH deteriorate to MVFR/IFR.
Some periods of rain could be heavy at times across parts of
RI/SE MA. An embedded t-storm or two is possible in this same
area as well. Periods of rain will continue today especially
across eastern MA/RI. MVFR with localized IFR conditions will
also continue through much of the day. Winds today from the NE
at 8-16. Some gusts to 20-25 kt primarily over the Cape and
Islands.
Tonight...Moderate confidence.
Rain clears out of the region tonight, though onshore winds may
keep conditions generally MVFR with areas of IFR across
southern New England. Lower cigs more likely over eastern MA and
RI. Possible lingering -SHRA and or -DZ thru 05z for the Cape
and Islands.
KBOS Terminal...Moderate confidence in TAF. Higher confidence
in overall trends, but exact timing is less certain.
KBDL Terminal...Moderate confidence in TAF.
Outlook /Wednesday through Saturday/...
Wednesday: VFR. Breezy.
Wednesday Night: VFR.
Thursday: VFR. Breezy.
Thursday Night: VFR. Breezy. Slight chance SHRA, slight chance
TSRA.
Friday: VFR. Breezy. Chance SHRA, chance TSRA.
Friday Night: VFR. Slight chance SHRA.
Saturday: VFR.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Tuesday Night...High confidence.
Weak low pressure passes well S of the waters and slides up
against high pressure over northern New England. Resultant NE
wind gusts of 20-30 kt through much of the day today. These
will likely continue through the overnight as well. Small Craft
Advisories were extended for the northeastern outer waters
through tonight as a result. Seas to 5 ft build over the
southern waters tonight, then shift to the eastern waters
Tuesday into Tuesday night. Pockets of 6 ft seas are possible
closer to the northern ocean water zones.
Outlook /Wednesday through Saturday/...
Wednesday through Wednesday Night: Winds less than 25 kt. Seas
up to 5 ft.
Thursday: Winds less than 25 kt. Areas of seas approaching
5 ft.
Thursday Night: Winds less than 25 kt. Seas up to 5 ft. Chance
of rain showers, slight chance of thunderstorms.
Friday: Winds less than 25 kt. Seas locally approaching 5 ft.
Slight chance of rain showers, slight chance of thunderstorms.
Friday Night: Winds less than 25 kt. Areas of seas approaching
5 ft. Slight chance of rain showers.
Saturday: Winds less than 25 kt. Areas of seas approaching
5 ft.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...Flood Watch until 2 PM EDT this afternoon for MAZ017>022.
RI...Flood Watch until 2 PM EDT this afternoon for RIZ001>008.
MARINE...Small Craft Advisory until 8 PM EDT this evening for
ANZ231>235-237-251-256.
Small Craft Advisory until 8 AM EDT Wednesday for ANZ250-254-
255.
&&
$$
DISCUSSION...FT
AVIATION...BW/FT
MARINE...FT
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 0 None
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
Monday:
0.01 in
July:
1.26 in
2026
1:17pm
36.1°F
High today:
12:00am
25.2°F
Low today:
2:28pm
30.4°F
High Monday:
7:11am
16.2°F
Low Monday:
12:00am
25.2°F
Low wind chill today:
7:11am
16.2°F
Low wind chill Monday:
1:17pm
33.3°F
High dew pt today:
11:56pm
20.7°F
High dew pt Monday:
None
Wind gust today:
None
Wind gust Monday:
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:
Last Quarter (82%)
Moon set:
8:18am
Moon rise:
9:38pm