Lexington Weather
Lexington, Massachusetts, USA
- Mostly cloudy
-
86.4°F / 30.2°C
-
71.8°F
- 92.7°F
-
62%
- Calm, 10-min avg: Calm, gust: 1 mph
-
- 10 miles
- 0.00 in
Current Conditions [‒] Current Conditions [+]
86.4°F
30.2°C
Feels like 92.7°F
Hot
Mostly cloudy
This Afternoon: Hi 90 °F
Tonight: Lo 70 °F
Dew Point:
71.8°F
Humidity:
62%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Wednesday: 0.00 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 1 mph
Alerts / Advisories [‒] Alerts / Advisories [+]
Forecast [‒] Forecast [+]
NWS Weather Forecast -
This Afternoon,
Tonight,
&
Friday
through
Wednesday Night
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Thu Jun 11, 2026 12:49pm EDT
Overview:
- Heat Advisories advisories remain in effect for northern CT and much of interior MA from noon today to 8pm Friday.
- A few scattered strong to severe thunderstorms are possible Thursday and Friday.
- Above normal temperatures continue into early next week, but humidity will be on the decrease. Weekend looking mostly dry, while uncertainty remains high regarding potential for rain showers early next week.
This Afternoon:
Mostly Sunny
Hi 90 °F
Mostly sunny, with a high near 90. Northwest wind around 7 mph. New rainfall amounts less than a tenth of an inch possible.
Tonight:
Slight Chance Showers And T-Storms then Mostly Cloudy
Lo 70 °F
A slight chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 70. West wind around 6 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Friday:
Slight Chance Rain Showers
Hi 86 °F
A slight chance of rain showers between 8am and 3pm. Mostly sunny, with a high near 86. Northwest wind 3 to 7 mph. Chance of precipitation is 20%.
Friday Night:
Chance Showers And T-Storms
Lo 67 °F
A chance of showers and thunderstorms between 11pm and 5am. Partly cloudy, with a low around 67. West wind 3 to 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Saturday:
Sunny
Hi 90 °F
Sunny, with a high near 90. Northwest wind around 8 mph.
Saturday Night:
Mostly Clear
Lo 65 °F
Mostly clear, with a low around 65. West wind 2 to 7 mph.
Sunday:
Mostly Sunny
Hi 92 °F
Mostly sunny, with a high near 92. Southwest wind 2 to 13 mph, with gusts as high as 24 mph.
Sunday Night:
Slight Chance Showers And T-Storms then Showers And T-Storms Likely
Lo 65 °F
A slight chance of showers and thunderstorms between 9pm and 10pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 65. Southwest wind 7 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
Monday:
Chance Rain Showers
Hi 84 °F
A chance of rain showers before 4pm. Partly sunny, with a high near 84. West wind around 8 mph. Chance of precipitation is 50%.
Monday Night:
Partly Cloudy
Lo 61 °F
Partly cloudy, with a low around 61. West wind 2 to 7 mph.
Tuesday:
Partly Sunny
Hi 82 °F
Partly sunny, with a high near 82. Southwest wind 2 to 8 mph.
Tuesday Night:
Partly Cloudy
Lo 60 °F
Partly cloudy, with a low around 60. Southwest wind around 6 mph.
Wednesday:
Mostly Sunny then Slight Chance Rain Showers
Hi 83 °F
A slight chance of rain showers after noon. Mostly sunny, with a high near 83. Southwest wind 3 to 9 mph.
Wednesday Night:
Slight Chance Rain Showers
Lo 63 °F
A slight chance of rain showers. Partly cloudy, with a low around 63. Southwest wind 3 to 8 mph.
NWS Hourly Forecast -
Today 1pm through Sat 12am
Issued by:
National Weather Service Boston / Norton, MA
Updated Thu Jun 11, 2026 4:29am EDT
1:00pm
Dew Pt 69°F
Heat Index: 94°F
W 7 mphPrecip: 4%
2:00pm
Dew Pt 69°F
Heat Index: 95°F
W 7 mphPrecip: 6%
3:00pm
Dew Pt 69°F
Heat Index: 95°F
W 7 mphPrecip: 5%
4:00pm
Dew Pt 69°F
Heat Index: 95°F
NW 7 mphPrecip: 7%
5:00pm
Dew Pt 69°F
Heat Index: 95°F
NW 6 mphPrecip: 11%
6:00pm
Dew Pt 69°F
Heat Index: 91°F
W 5 mphPrecip: 17%
7:00pm
Dew Pt 69°F
Heat Index: 89°F
W 5 mphPrecip: 24%
Rain: 0.01 in
8:00pm
Dew Pt 70°F
Heat Index: 85°F
NW 3 mphPrecip: 19%
9:00pm
Dew Pt 70°F
W 3 mphPrecip: 17%
10:00pm
Dew Pt 70°F
W 3 mphPrecip: 15%
11:00pm
Dew Pt 69°F
W 3 mphPrecip: 13%
12:00am
Dew Pt 69°F
W 3 mphPrecip: 10%
1:00am
Dew Pt 69°F
W 3 mphPrecip: 9%
2:00am
Dew Pt 69°F
W 3 mphPrecip: 5%
3:00am
Dew Pt 68°F
W 3 mphPrecip: 5%
4:00am
Dew Pt 68°F
W 3 mphPrecip: 6%
5:00am
Dew Pt 68°F
W 3 mphPrecip: 7%
6:00am
Dew Pt 68°F
W 3 mphPrecip: 7%
7:00am
Dew Pt 69°F
W 3 mphPrecip: 8%
8:00am
Dew Pt 70°F
NW 3 mphPrecip: 7%
9:00am
Dew Pt 70°F
Heat Index: 83°F
NW 3 mphPrecip: 5%
10:00am
Dew Pt 70°F
Heat Index: 87°F
NW 3 mphPrecip: 1%
11:00am
Dew Pt 70°F
Heat Index: 90°F
NW 5 mphPrecip: 0%
12:00pm
Dew Pt 70°F
Heat Index: 92°F
W 5 mphPrecip: 1%
1:00pm
Dew Pt 70°F
Heat Index: 93°F
W 6 mphPrecip: 3%
2:00pm
Dew Pt 69°F
Heat Index: 94°F
SW 6 mphPrecip: 17%
3:00pm
Dew Pt 69°F
Heat Index: 92°F
SE 7 mphPrecip: 13%
4:00pm
Dew Pt 69°F
Heat Index: 90°F
SE 8 mphPrecip: 9%
5:00pm
Dew Pt 68°F
Heat Index: 87°F
SE 8 mphPrecip: 9%
6:00pm
Dew Pt 68°F
Heat Index: 85°F
SE 7 mphPrecip: 10%
7:00pm
Dew Pt 68°F
Heat Index: 83°F
SE 6 mphPrecip: 12%
8:00pm
Dew Pt 68°F
E 5 mphPrecip: 12%
9:00pm
Dew Pt 68°F
SE 5 mphPrecip: 27%
10:00pm
Dew Pt 67°F
SW 5 mphPrecip: 42%
Rain: 0.01 in
11:00pm
Dew Pt 67°F
W 3 mphPrecip: 57%
Rain: 0.02 in
12:00am
Dew Pt 67°F
W 3 mphPrecip: 52%
Rain: 0.01 in
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 111131
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
731 AM EDT Thu Jun 11 2026
.WHAT HAS CHANGED...
Forecast remains on track at this time.
&&
.KEY MESSAGES...
- Heat Advisories advisories remain in effect for northern CT
and much of interior MA from noon today to 8pm Friday.
- A few scattered strong to severe thunderstorms are possible
Thursday and Friday.
- Above normal temperatures continue into early next week, but
humidity will be on the decrease. Weekend looking mostly dry,
while uncertainty remains high regarding potential for rain
showers early next week.
&&
.DISCUSSION...
KEY MESSAGE 1...Heat Advisories advisories remain in effect for
northern CT and much of interior MA from noon today to 8pm
Friday.
Increasing heat and humidity pose a risk today and Friday with
the arrival of the warmest airmass of the season. 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 already in the low 60s
just after 2AM and will only continue to climb throughout the
day, likely topping out at or near 70, 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 today and likely above 100F Friday
across the CT River Valley. As such, Heat Advisories remain in
effect for these areas through 8pm Friday.
Temperatures across RI and eastern MA likely remain in the
upper 80s to low 90s across both days. Dewpoints surging to at
or near 70 across most of southern New England both today and
Friday will lead to heat indicies in the low 90s, especially
away from the coastal plain. A backdoor cold front is also
expected to drop into eastern MA sometime on Friday. Onshore
flow will provide some relief from the heat Friday... likely
leading to temperatures along the immediate coast topping out in
the low 80 with heat indicies in the mid to upper 80s. Some
uncertainty still remains how far inland the front will push,
but currently thinking it'll fall short of reaching ORH.
Regardless, widespread moderate heat impacts are expected across
the region, with pockets of major heat impacts possible in the
CT River Valley, both today and Friday, leading to an increased
risk of heat-related illness for anyone spending extended time
outdoors without adequate hydration or access to cooling.
KEY MESSAGE 2...A few scattered strong to severe thunderstorms
are possible Thursday and Friday.
The increased heat and humidity combined with a series of weak
upper- level disturbances continue to be the catalyst for
showers and thunderstorms later today and again Friday. While
confidence has waned somewhat, the potential for some severe
storms across western CT this evening remain. CSU ML
probabilities continue to show 15-30 percent for severe wind
potential, and the latest guidance shows CAPE values upwards of
1500 J/kg with pockets of up to 2200 J/kg possible across far
western CT... however, those higher values are likely to quickly
decay as they push east, which would lead to short- level
cells. Latest CAMs continue to show 0-6km Bulk Shear values
struggling to reach 20 kts, with highest values concentrated
across western and southern CT. Regardless, any storms that do
form will quickly tap into the unstable airmass, with the
primary threat continuing to be damaging winds.
Friday looks to be very similar, with the exception that CSU ML
probabilities have a narrow corridor in western CT favoring a
30 to 45 percent chance for severe winds. Some model sounding
are indicating significantly higher DCAPE values Friday evening
compared to this evening, which would support a chance for
higher thunderstorm driven winds. Uncertainty remains Friday
regarding how widespread storm coverage could be.
KEY MESSAGE 3...Above normal temperatures continue into early
next week, but humidity will be on the decrease. Weekend looking
mostly dry, while uncertainty remains high regarding potential
for rain showers early next week.
A weak high pressure sandwiched between two fronts should
dominate our weather for most of this weekend, bringing lowering
dewpoints and decreased humidity. While it will still be plenty
warm for most of southern New England, peak heat index values
should remain mainly in the 80s, with a few locations reaching
the lower 90s.
Still quite a bit of uncertainty with the details of the
forecast early next week. The latest guidance stalls yet another
front towards the south coast of New England as a weak low
pressure develops towards NJ sometime Monday night into Tuesday.
The forcing looks rather weak, but cannot completely dismiss
the idea of scattered showers in our area at times. A subtle
shift of even just 20 miles to the south, and the forecast could
be largely dry. Changes with later forecasts are expected.
&&
.AVIATION /12Z THURSDAY THROUGH MONDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Thursday... High Confidence
Mainly VFR today except for Cape/Islands where some IFR/MVFR
ceilings and vsbys will be present. There is a risk for
thunderstorms after 18Z, but the risk is highest at BAF/BDL.
While there is a non-zero chance for -SHRA/-TSRA at the other
terminals, confidence is not currently high enough to mention in
TAF. A sea-breeze is likely at BOS beginning 17-18Z.
Thursday Night...Moderate confidence.
Any -SHRA/-TSRA tapers off by 03-04Z. Mainly VFR, with some
MVFR/IFR vsbys developing in patchy fog. Light and variable
winds.
Friday...Moderate confidence.
VFR. Light onshore winds developing.
KBOS Terminal...High in TAF.
KBDL Terminal...Moderate Confidence in TAF. Risk for -TSRA this
afternoon/evening after 18Z.
Outlook /Friday Night through Monday/...
Friday Night: VFR. Breezy. Chance SHRA, slight chance TSRA.
Saturday: VFR. Breezy.
Saturday Night: VFR.
Sunday: VFR. Breezy.
Sunday Night: VFR. Breezy. Chance SHRA, slight chance TSRA.
Monday: VFR. Chance SHRA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Friday...High confidence.
Seas 2-4 feet for the majority of the waters except 3-5 feet
across the southern outer waters tonight. SW winds increase to
15-25 kt with gusts as high as 30 kts. Areas of showers and
perhaps a thunderstorm or two through Thursday morning. SCA
conditions continue for the southern waters Thursday before
gradually subsiding by the late evening.
Outlook /Friday Night through Monday/...
Friday Night: Winds less than 25 kt. Chance of rain showers.
Saturday through Sunday: Winds less than 25 kt.
Sunday Night: Winds less than 25 kt. Seas locally approaching
5 ft. Rain showers likely, slight chance of thunderstorms.
Monday: Winds less than 25 kt. Chance of rain showers, slight
chance of thunderstorms.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Heat Advisory from noon today to 8 PM EDT Friday for
CTZ002>004.
MA...Heat Advisory from noon today to 8 PM EDT Friday for MAZ002-
003-008>011.
Air Quality Alert from 11 AM this morning to 11 PM EDT this
evening for MAZ013-016>024.
RI...Air Quality Alert from 11 AM this morning to 11 PM EDT this
evening for RIZ001>008.
MARINE...Small Craft Advisory until 8 PM EDT this evening for
ANZ254>256.
&&
$$
DISCUSSION...McMinn
AVIATION...McMinn/RM
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
Wednesday:
0.25 in
June:
10.13 in
2026
51.1 in
Season Snow:
Daily Extremes [‒] Daily Extremes [+]
1:16pm
87.1°F
High today:
6:16am
69.3°F
Low today:
1:54pm
87.4°F
High Wednesday:
5:27am
63.0°F
Low Wednesday:
12:45pm
74.5°F
High dew pt today:
1:06pm
72.1°F
High dew pt Wednesday:
12:45pm
95.5°F
High heat index today:
2:54pm
94.0°F
High heat index Wednesday:
11:53am
3 mph
Wind gust today:
12:46pm
14 mph
Wind gust Wednesday:
Sun / Moon [‒] Sun / Moon [+]
First Light:
4:33am
Sunrise:
5:07am
Sunset:
8:22pm
Twilight ends:
8:57pm
Daylight length:
15 hours 15 minutes
Phase:
Waning Crescent (17%)
Moon rise:
2:05am
Moon set:
4:33pm
Social Media - Mastodon [‒] Social Media - Mastodon [+]
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