Lexington, Massachusetts, USA
35.1°F
1.7°C
Cold
Clear
Today: Hi 87 °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: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Tue Jun 9, 2026 6:55am EDT
- Dry conditions and low humidity continue through tonight leading to another pleasant day.
- Diurnal thunderstorms possible Wednesday through Friday, with above normal temperatures peaking on Friday.
- Temperatures remain warm, but humidity decreases, throughout the weekend, while uncertainty remains high regarding potential for rain showers.
Sunny
Hi 87 °F
Sunny, with a high near 87. West wind 8 to 13 mph, with gusts as high as 23 mph.
Mostly Clear
Lo 59 °F
Mostly clear, with a low around 59. Southwest wind 6 to 12 mph.
Partly Sunny then Chance Rain Showers
Hi 88 °F
A chance of rain showers after 2pm. Partly sunny. High near 88, with temperatures falling to around 81 in the afternoon. Southwest wind 6 to 14 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Chance Rain Showers
Lo 64 °F
A chance of rain showers before 5am. Mostly cloudy, with a low around 64. Southwest wind 5 to 13 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Showers And T-Storms Likely
Hi 90 °F
A chance of rain showers between 8am and 2pm, then showers and thunderstorms likely. Partly sunny, with a high near 90. West wind 5 to 8 mph. Chance of precipitation is 60%.
Showers And T-Storms Likely then Slight Chance Showers And T-Storms
Lo 64 °F
Showers and thunderstorms likely before 8pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 64. West wind around 6 mph. Chance of precipitation is 60%.
Slight Chance Rain Showers
Hi 85 °F
A slight chance of rain showers. Partly sunny, with a high near 85. Northeast wind 3 to 8 mph.
Chance Rain Showers
Lo 63 °F
A chance of rain showers before 2am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Southeast wind 2 to 7 mph. Chance of precipitation is 30%.
Chance Showers And T-Storms then Slight Chance Showers And T-Storms
Hi 85 °F
A chance of showers and thunderstorms before 11am, then a slight chance of showers and thunderstorms between 11am and 5pm. Partly sunny, with a high near 85. West wind 2 to 7 mph. Chance of precipitation is 30%.
Partly Cloudy
Lo 64 °F
Partly cloudy, with a low around 64. West wind around 6 mph.
Sunny
Hi 89 °F
Sunny, with a high near 89. West wind 5 to 9 mph.
Partly Cloudy then Slight Chance Rain Showers
Lo 62 °F
A slight chance of rain showers after 2am. Partly cloudy, with a low around 62. West wind 3 to 8 mph.
Chance Rain Showers
Hi 83 °F
A chance of rain showers. Mostly sunny, with a high near 83. East wind 3 to 8 mph. Chance of precipitation is 30%.
Chance Rain Showers
Lo 61 °F
A chance of rain showers. Mostly cloudy, with a low around 61. Southeast wind around 7 mph.
Issued by:
National Weather Service Boston / Norton, MA
Updated Tue Jun 9, 2026 6:55am EDT

W 13 mph
W 13 mph
W 13 mph
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W 12 mph
SW 12 mph
SW 10 mph
SW 9 mph
SW 9 mph
SW 9 mph
SW 9 mph
SW 8 mph
SW 7 mph
SW 6 mph
SW 6 mph
SW 6 mph
SW 6 mph
SW 6 mph
SW 7 mph
SW 7 mph
SW 8 mph
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SW 12 mph
S 12 mph
S 8 mph
S 7 mph
S 7 mph
S 7 mph
000
FXUS61 KBOX 091120
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
720 AM EDT Tue Jun 9 2026
.WHAT HAS CHANGED...
No significant forecast changes.
&&
.KEY MESSAGES...
- Dry conditions and low humidity continue through tonight
leading to another pleasant day.
- Diurnal thunderstorms possible Wednesday through Friday,
with above normal temperatures peaking on Friday.
- Temperatures remain warm, but humidity decreases, throughout
the weekend, while uncertainty remains high regarding
potential for rain showers.
&&
.DISCUSSION...
KEY MESSAGE 1...Dry conditions and low humidity continue
through tonight leading to another pleasant day.
The high pressure system sitting south of Long Island will
continue to slowly meander further south throughout today,
allowing for the continuation of dry conditions and mostly clear
skies. Temperatures will continue to warm over the next week,
aided by southwesterly flow, bringing today's high temperatures
well into the 80s, with the exception of the immediate south
coast, Cape, and Islands, where temperatures should remain in
the low to mid 70s. Dewpoints will remain generally below 55, so
humidity levels will remain quite comfortable despite the warm
temperatures.
KEY MESSAGE 2...Diurnal thunderstorms possible Wednesday
through Friday, with above normal temperatures peaking on
Friday.
As the high pressure system moves south, dew points will surge
generally in the mid to upper 60s... possible to near 70 degrees
in some areas. While the combination of heat and humidity will
create enough instability for elevated chances for the
development of scattered showers and thunderstorms, several weak
disturbances moving through the upper atmosphere could help
trigger this activity, particularly during the afternoon and
evening hours.
There remains little indication of a widespread severe weather
event at this time. Guidance continues to indicate a possible
weak warm front, somewhat limited instability, and weaker wind
shear on Friday. Even so, a few stronger storms cannot be ruled
out. The latest CSU machine-learning guidance continues to
indicate a 5 to 15 percent probability of severe weather
Thursday into Friday, with slightly higher probabilities of 15
to 30 percent across portions of Connecticut. Forecast
confidence regarding thunderstorm coverage and intensity should
improve as higher-resolution guidance becomes available over the
next couple of days.
Confidence is slowly increasing that heat and humidity could
pose a risk, especially Thursday and Friday when heat index
values may approach 100 degrees in parts of the Connecticut
River Valley. These values are associated with moderate to major
heat impacts, increasing the risk of heat-related illness for
anyone spending extended time outdoors without adequate
hydration or access to cooling.
KEY MESSAGE 3...Temperatures remain warm, but humidity
decreases, throughout the weekend, while uncertainty remains
high regarding potential for rain showers.
By the weekend, a mid-level ridge is expected to strengthen
over southern New England, promoting rising heights aloft and a
somewhat drier air mass. Some ensemble guidance is even
indicating a quick low spinning up over southern New England
Saturday or Sunday, which introduces the potential for some
spotty rain showers. Regardless, temperatures will remain quite
warm, but dew points should fall back into the 50s, resulting in
noticeably more comfortable conditions.
&&
.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...High confidence.
VFR conditions continue today into much of Wednesday. Some MVFR
to localized IFR conditions may overspread parts of the region
from southwest to northeast by late Wednesday afternoon/early
evening along with a few showers.
SW winds will gust around 20 knots this afternoon...except
25-30 knots towards the Cape. Gusts diminish early this
evening...but may linger a bit longer near the upper
Cape/Buzzards Bay area.
KBOS Terminal...High confidence in TAF.
KBDL Terminal...High confidence in TAF.
Outlook /Wednesday Night through Saturday/...
Wednesday Night: Mainly VFR, with areas IFR possible. Breezy.
Chance SHRA, slight chance TSRA.
Thursday: VFR. Chance SHRA, slight chance TSRA.
Thursday Night through Friday: Mainly VFR, with local MVFR
possible. Slight chance SHRA, slight chance TSRA.
Friday Night: VFR. Chance SHRA, slight chance TSRA.
Saturday: VFR. 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.
Through Wednesday Morning...High confidence.
High pressure centered across the mid-Atlantic states will
continue to slowly sink southward through Tuesday night, with
winds already shifting SW. Good mixing over the land should
yield SW wind gusts around 25 knots across our nearshore
southern waters Tuesday afternoon, prompting the continuation of
Small Craft Advisories. The rest of the region should generally
remain below small craft advisory criteria through Wednesday
morning.
Outlook /Wednesday Night through Saturday/...
Wednesday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft. Rain showers, slight chance
of thunderstorms.
Thursday: Winds less than 25 kt. Local rough seas. Slight
chance of rain showers, slight chance of thunderstorms.
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. Areas of seas approaching 5 ft.
Friday Night through Saturday: 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 7 PM EDT this evening for
ANZ231>236.
&&
$$
DISCUSSION...McMinn
AVIATION...Frank
MARINE...McMinn
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 9 Very High
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
June:
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:
Waning Crescent (82%)
Moon set:
8:18am
Moon rise:
9:38pm