Lexington Weather
Lexington, Massachusetts, USA
- Clear
-
85.8°F / 29.9°C
-
70.3°F
- 90.9°F
-
60%
- Calm, 10-min avg: Calm, gust: 9 mph
-
- 10 miles
- 0.00 in
Current Conditions [‒] Current Conditions [+]
85.8°F
29.9°C
Feels like 90.9°F
Hot
Clear
Today: Hi 88 °F
Tonight: Lo 68 °F
Dew Point:
70.3°F
Humidity:
60%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Tuesday: 0.00 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 9 mph
Forecast [‒] Forecast [+]
NWS Weather Forecast -
Today,
Tonight,
&
Thursday
through
Tuesday Night
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Wed Jun 10, 2026 4:06am EDT
Overview:
- Chances for showers and thunderstorms return this afternoon into tonight.
- Heat Advisories have been issued across interior MA and CT Thursday into Friday. Diurnal thunderstorms remain a possibility during the afternoon and evening hours Thursday and Friday.
- Temperatures remain warm with decreasing humidity throughout the weekend, while uncertainty remains high regarding potential for rain showers.
Today:
Partly Sunny
Hi 88 °F
Partly sunny, with a high near 88. Southwest wind 6 to 10 mph.
Tonight:
Chance Showers And T-Storms
Lo 68 °F
A chance of showers and thunderstorms between 8pm and 11pm, then a chance of showers and thunderstorms between 11pm and 1am, then patchy fog and a chance of showers and thunderstorms between 1am and 3am, then patchy fog and a slight chance of rain showers. Mostly cloudy, with a low around 68. Southwest wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Thursday:
Patchy Fog then Chance Showers And T-Storms
Hi 89 °F
Patchy fog before 7am, then a chance of showers and thunderstorms between 2pm and 5pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 89. West wind around 7 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Thursday Night:
Chance Showers And T-Storms then Mostly Cloudy
Lo 68 °F
A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 68. Northeast wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Friday:
Slight Chance Rain Showers
Hi 84 °F
A slight chance of rain showers between 10am and 2pm. Partly sunny, with a high near 84. East wind 2 to 8 mph. Chance of precipitation is 20%.
Friday Night:
Chance Showers And T-Storms
Lo 65 °F
A slight chance of rain showers before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65. East wind 3 to 8 mph. Chance of precipitation is 50%.
Saturday:
Chance Showers And T-Storms then Mostly Sunny
Hi 89 °F
A chance of showers and thunderstorms before 8am. Mostly sunny, with a high near 89. North wind 3 to 8 mph. Chance of precipitation is 40%.
Saturday Night:
Mostly Clear
Lo 64 °F
Mostly clear, with a low around 64. South wind 2 to 7 mph.
Sunday:
Sunny
Hi 90 °F
Sunny, with a high near 90. Southwest wind 2 to 12 mph.
Sunday Night:
Chance Rain Showers
Lo 64 °F
A chance of rain showers after 8pm. Mostly cloudy, with a low around 64. Southwest wind 6 to 12 mph. Chance of precipitation is 40%.
Monday:
Chance Rain Showers
Hi 84 °F
A chance of rain showers. Partly sunny, with a high near 84. West wind 6 to 9 mph. Chance of precipitation is 40%.
Monday Night:
Chance Rain Showers
Lo 60 °F
A chance of rain showers. Mostly cloudy, with a low around 60. West wind 5 to 9 mph. Chance of precipitation is 40%.
Tuesday:
Chance Rain Showers
Hi 80 °F
A chance of rain showers. Partly sunny, with a high near 80. Northeast wind 5 to 8 mph. Chance of precipitation is 40%.
Tuesday Night:
Chance Rain Showers
Lo 60 °F
A chance of rain showers. Mostly cloudy, with a low around 60. Northeast wind 3 to 7 mph.
NWS Hourly Forecast -
Today 1pm through Fri 12am
Issued by:
National Weather Service Boston / Norton, MA
Updated Wed Jun 10, 2026 4:06am EDT
1:00pm
Dew Pt 63°F
Heat Index: 88°F
SW 9 mphPrecip: 4%
2:00pm
Dew Pt 63°F
Heat Index: 89°F
SW 10 mphPrecip: 5%
3:00pm
Dew Pt 63°F
Heat Index: 89°F
SW 10 mphPrecip: 6%
4:00pm
Dew Pt 64°F
Heat Index: 88°F
SW 10 mphPrecip: 9%
5:00pm
Dew Pt 64°F
Heat Index: 87°F
SW 10 mphPrecip: 10%
6:00pm
Dew Pt 64°F
Heat Index: 84°F
SW 10 mphPrecip: 12%
7:00pm
Dew Pt 65°F
Heat Index: 83°F
S 10 mphPrecip: 14%
8:00pm
Dew Pt 65°F
S 9 mphPrecip: 39%
Rain: 0.01 in
9:00pm
Dew Pt 65°F
S 8 mphPrecip: 38%
Rain: 0.01 in
10:00pm
Dew Pt 65°F
SW 8 mphPrecip: 37%
Rain: 0.01 in
11:00pm
Dew Pt 65°F
SW 7 mphPrecip: 41%
Rain: 0.02 in
12:00am
Dew Pt 65°F
S 6 mphPrecip: 40%
Rain: 0.02 in
1:00am
Dew Pt 65°F
SW 6 mphPrecip: 36%
Rain: 0.01 in
2:00am
Dew Pt 65°F
S 6 mphPrecip: 28%
3:00am
Dew Pt 65°F
S 6 mphPrecip: 21%
4:00am
Dew Pt 65°F
SW 5 mphPrecip: 17%
5:00am
Dew Pt 65°F
SW 5 mphPrecip: 11%
6:00am
Dew Pt 66°F
SW 5 mphPrecip: 8%
7:00am
Dew Pt 66°F
SW 5 mphPrecip: 7%
8:00am
Dew Pt 67°F
W 6 mphPrecip: 5%
9:00am
Dew Pt 68°F
W 6 mphPrecip: 3%
10:00am
Dew Pt 68°F
Heat Index: 84°F
W 6 mphPrecip: 0%
11:00am
Dew Pt 69°F
Heat Index: 88°F
W 7 mphPrecip: 3%
12:00pm
Dew Pt 69°F
Heat Index: 90°F
W 7 mphPrecip: 7%
1:00pm
Dew Pt 69°F
Heat Index: 92°F
W 7 mphPrecip: 10%
2:00pm
Dew Pt 69°F
Heat Index: 92°F
W 7 mphPrecip: 37%
Rain: 0.02 in
3:00pm
Dew Pt 69°F
Heat Index: 94°F
NW 7 mphPrecip: 36%
Rain: 0.02 in
4:00pm
Dew Pt 70°F
Heat Index: 93°F
NW 7 mphPrecip: 30%
Rain: 0.01 in
5:00pm
Dew Pt 70°F
Heat Index: 92°F
NW 6 mphPrecip: 33%
Rain: 0.01 in
6:00pm
Dew Pt 70°F
Heat Index: 90°F
N 5 mphPrecip: 34%
Rain: 0.01 in
7:00pm
Dew Pt 69°F
Heat Index: 87°F
E 3 mphPrecip: 22%
8:00pm
Dew Pt 69°F
Heat Index: 83°F
E 3 mphPrecip: 8%
9:00pm
Dew Pt 68°F
E 3 mphPrecip: 10%
10:00pm
Dew Pt 68°F
NE 3 mphPrecip: 12%
11:00pm
Dew Pt 67°F
NE 2 mphPrecip: 14%
12:00am
Dew Pt 67°F
NE 2 mphPrecip: 13%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 101134
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
734 AM EDT Wed Jun 10 2026
.WHAT HAS CHANGED...
Heat Advisories have been issued for interior MA and northern
CT from noon Thursday until 8PM Friday. Increasing confidence in
a few storms possibly becoming severe in nature Thursday
evening.
&&
.KEY MESSAGES...
- Chances for showers and thunderstorms return this afternoon
into tonight.
- Heat Advisories have been issued across interior MA and
CT Thursday into Friday. Diurnal thunderstorms remain a
possibility during the afternoon and evening hours Thursday
and Friday.
- Temperatures remain warm with decreasing humidity throughout
the weekend, while uncertainty remains high regarding
potential for rain showers.
&&
.DISCUSSION...
KEY MESSAGE 1...Chances for showers and thunderstorms return
this afternoon into tonight.
A warm front associated with low pressure system tracking
through the Great Lakes and southern Ontario will sweep through
southern New England will bring some showers and possibly
thunderstorms to the region later this afternoon and into the
overnight period. Potential for severe still seems low, with the
CSU ML probabilities remaining at a 5-15 percent chance for
severe wind across western MA and CT. Similar trends are being
seen in the latest run of the HRRR Neural Network, with highest
potential for severe winds across interior MA and CT tonight.
Given winds turning southwesterly today, expecting to see
dewpoints and PWATs surge... the latest model guidance is
indicating PWATs 1.9"-2.0" across most of southern New England,
with pockets of up to 2.2" possible across central and southern
CT heading into the early Thursday morning hours. Unfortunately,
confidence in where exactly storms could initiate remains on
the lower side. Latest guidance continues to keep the heaviest
rainfall in northern New England and offshore to the south...
regardless, any rainfall that does form is likely to be heavy in
nature.
KEY MESSAGE 2...Heat Advisories have been issued across
interior MA and CT Thursday into Friday. Diurnal thunderstorms
remain a possibility during the afternoon and evening hours
Thursday and Friday.
Confidence continues to increase that heat and humidity will
pose a risk Thursday and Friday. As the warm front from
Wednesday lifts further north, prolonged southwesterly flow will
bring a surge of very hot and humid air, especially as 925mb
temperatures increase to +27C Thursday and up to +30C Friday.
Surface dewpoints are likely to top out in the upper 60s to low
70s, especially across interior MA and northern CT. These high
dewpoints combined with temperatures climbing into the low to
mid 90s will lead to heat index values approaching 100F Thursday
and likely above 100F Friday across the CT River Valley,
prompting Heat Advisories to be issued for northern CT and
western MA from noon Thursday until 8PM Friday.
Temperatures across RI and eastern MA likely remain in the mid
80s to low 90s across both days. Dewpoints surging to near 70
will lead to heat indicies in the low 90s, especially away from
the coastal plain. Heat Advisories may be expanded further east;
however, a backdoor cold front is expected to drop into eastern
MA sometime on Friday. Onshore flow will provide some relief
from the heat Friday, but the question remains how far inland
the front will drop. Regardless, widespread moderate heat
impacts across the region, with major impacts expected in the CT
River Valley, both Thursday and Friday, leading to an increased
risk of heat-related illness for anyone spending extended time
outdoors without adequate hydration or access to cooling.
The increased heat and humidity combined with a series of weak
upper- level disturbances will also set the stage for higher
chances of showers and thunderstorms Thursday and Friday, with
increasing potential that some storms Thursday may be severe in
nature. CSU ML probabilities have increased to 15-30 percent for
severe wind potential and 5-15 percent chance to see small hail
across the interior. Latest guidance is showing CAPE values of
1300+ J/kg Thursday evening, with pockets of up to 2000 J/kg
possible across far western CT... however, those higher values
are likely to rapidly decay as they push east, which would lead
to short-level cells. Regardless, confidence has increased
enough to upgrade the western portion of southern New England
from General Thunderstorms to a Slight Risk for severe weather
Thursday.
KEY MESSAGE 3...Temperatures remain warm with decreasing
humidity throughout the weekend, while uncertainty remains high
regarding potential for rain showers.
Anticipating the passage of a couple fronts Saturday and
Sunday. The main impact will be lower humidity, with Sunday
anticipated the drier of the two. Lingering showers possible
Saturday, but plenty of dry hours too. Some guidance members
indicated a weak low pressure passing by towards the south coast
of New England sometime Monday into Tuesday. Kept a mention of
showers in the forecast, but confidence in these details is low.
&&
.AVIATION /12Z WEDNESDAY THROUGH SUNDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Tonight...High confidence to start, moderate confidence
towards the nighttime hours.
VFR conditions continue through much of today. Some MVFR to
localized IFR conditions may overspread parts of the region from
southwest to northeast by early this evening along with a few
showers. Showers become more likely tonight, but coverage is
still relatively uncertain, with western terminals most likely
to see showers and a rumble of thunder.
Gusts to around 20 kt may make a return by the mid/late morning
hours. SW winds will shift more S in the wake of a passing warm
front later today into tonight.
Thursday...Moderate confidence.
Generally MVFR/IFR conditions. Improvement from showers and fog
overnight will likely be slow (not until 12z or later). Some
areas could be on the cusp of LIFR conditions as any lingering
showers push offshore. SW winds continue through the morning
hours, generally around 10 kts once showers move out.
KBOS Terminal...High confidence in trends. Moderate confidence
in timing. Seabreeze possible today between 14-20z before winds
flip back to SW. PROB30 for SHRA switched to a TEMPO.
KBDL Terminal...High confidence in trends. Moderate confidence
in timing. Timing for SHRA and later TSRA still a bit uncertain.
Included as TEMPOs for now.
Outlook /Thursday Night through Sunday/...
Thursday Night: VFR. Slight chance SHRA.
Friday: Mainly VFR, with local MVFR possible. Slight chance
SHRA.
Friday Night: Mainly VFR, with local IFR possible. Chance SHRA,
slight chance TSRA.
Saturday through Saturday Night: VFR.
Sunday: VFR. Breezy.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Thursday Morning...High confidence.
Winds shift more SW then SSW Wednesday afternoon, sustained at
around 15-20 kt with gusts remaining just below Small Craft
criteria. Seas generally 2-4 ft through Wednesday night, though
the southern outer waters may start to creep to 5 ft heading
into Thursday morning.
Outlook /Thursday Night through Sunday/...
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.
Friday Night through Saturday: Winds less than 25 kt. Slight
chance of rain showers.
Saturday Night: Winds less than 25 kt. Seas locally approaching
5 ft.
Sunday: Winds less than 25 kt.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Heat Advisory from noon Thursday to 8 PM EDT Friday for
CTZ002>004.
MA...Heat Advisory from noon Thursday to 8 PM EDT Friday for MAZ002-
003-008>011.
RI...None.
MARINE...None.
&&
$$
DISCUSSION...McMinn
AVIATION...Hrencecin/McMinn
MARINE...McMinn
Radar [‒] Radar [+]
Radar images courtesy Weather Underground / Intellicast.
Satellite [‒] Satellite [+]
Satellite images courtesy Weather Underground / Intellicast.
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UV Forecast [‒] UV Forecast [+]
UV Index forecast from the Environmental Protection Agency
UV Index forecast high for today: 9 Very High
Current (Estimated): 9 Very High
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:
0.00 in
Rain Today:
0.00 in
Tuesday:
0.25 in
June:
10.13 in
2026
51.1 in
Season Snow:
Daily Extremes [‒] Daily Extremes [+]
12:56pm
86.0°F
High today:
5:27am
63.0°F
Low today:
4:41pm
82.2°F
High Tuesday:
5:48am
57.9°F
Low Tuesday:
12:01pm
71.8°F
High dew pt today:
7:45pm
63.3°F
High dew pt Tuesday:
12:57pm
91.8°F
High heat index today:
5:19pm
83.3°F
High heat index Tuesday:
12:46pm
14 mph
Wind gust today:
1:09pm
8 mph
Wind gust Tuesday:
Alerts / Advisories [‒] Alerts / Advisories [+]
No alerts/warnings active for Southeast Middlesex County.
Sun / Moon [‒] Sun / Moon [+]
First Light:
4:33am
Sunrise:
5:07am
Sunset:
8:21pm
Twilight ends:
8:56pm
Daylight length:
15 hours 14 minutes
Phase:
Waning Crescent (26%)
Moon rise:
1:41am
Moon set:
3:16pm
Social Media - Mastodon [‒] Social Media - Mastodon [+]
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