Lexington Weather
Lexington, Massachusetts, USA
- Haze, Smoke, Clear
-
79.2°F / 26.2°C
-
64.0°F
-
60%
- Calm, 10-min avg: Calm, gust: 3 mph
- 6 miles
- 0.00 in
Current Conditions [‒] Current Conditions [+]
79.2°F
26.2°C
Muggy
Haze, Smoke, Clear
This Afternoon: Hi 85 °F
Tonight: Lo 67 °F
Dew Point:
64.0°F
Humidity:
60%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Tuesday: 0.00 in
Visibility: 6 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 3 mph
Alerts / Advisories [‒] Alerts / Advisories [+]
Forecast [‒] Forecast [+]
NWS Weather Forecast -
This Afternoon,
Tonight,
&
Thursday
through
Tuesday Night
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Wed Jul 15, 2026 2:29pm EDT
Overview:
- Hazy/smoky conditions linger.
- Dangerous rip currents expected on south-facing beaches into this evening.
- While seasonable temperatures return for the end of the week, chances for showers and thunderstorms begin to increase heading into the weekend.
This Afternoon:
Smoke
Hi 85 °F
Smoke before 5pm, then haze. Mostly cloudy, with a high near 85. Northwest wind around 12 mph, with gusts as high as 23 mph.
Tonight:
Haze then Mostly Clear
Lo 67 °F
Haze before 10pm. Mostly clear, with a low around 67. West wind 3 to 10 mph, with gusts as high as 21 mph.
Thursday:
Patchy Smoke
Hi 89 °F
Patchy smoke after 9am. Sunny, with a high near 89. West wind 5 to 14 mph, with gusts as high as 26 mph.
Thursday Night:
Partly Cloudy
Lo 63 °F
Partly cloudy, with a low around 63. Northwest wind 5 to 13 mph, with gusts as high as 24 mph.
Friday:
Sunny
Hi 85 °F
Sunny, with a high near 85. Northwest wind 5 to 8 mph.
Friday Night:
Partly Cloudy
Lo 63 °F
Partly cloudy, with a low around 63. West wind 1 to 7 mph.
Saturday:
Mostly Cloudy then Chance Showers And T-Storms
Hi 85 °F
A slight chance of rain showers between noon and 2pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 85. Southwest wind 2 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Saturday Night:
Showers And T-Storms
Lo 67 °F
Showers and thunderstorms. Mostly cloudy, with a low around 67. Southwest wind around 12 mph. Chance of precipitation is 90%.
Sunday:
Showers And T-Storms Likely then Slight Chance Showers And T-Storms
Hi 85 °F
Showers and thunderstorms likely before 11am, then a slight chance of showers and thunderstorms between 11am and 4pm. Partly sunny, with a high near 85. West wind around 10 mph. Chance of precipitation is 70%.
Sunday Night:
Mostly Clear
Lo 63 °F
Mostly clear, with a low around 63. Northwest wind 3 to 8 mph.
Monday:
Sunny
Hi 85 °F
Sunny, with a high near 85. Southwest wind 3 to 7 mph.
Monday Night:
Partly Cloudy
Lo 66 °F
Partly cloudy, with a low around 66. South wind 3 to 7 mph.
Tuesday:
Chance Rain Showers
Hi 86 °F
A chance of rain showers between 7am and 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. South wind 3 to 9 mph. Chance of precipitation is 40%.
Tuesday Night:
Chance Showers And T-Storms
Lo 67 °F
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Southwest wind 5 to 9 mph.
NWS Hourly Forecast -
Today 3pm through Fri 2am
Issued by:
National Weather Service Boston / Norton, MA
Updated Wed Jul 15, 2026 9:25am EDT
3:00pm
Dew Pt 59°F
NW 12 mphPrecip: 7%
4:00pm
Dew Pt 58°F
NW 12 mphPrecip: 7%
5:00pm
Dew Pt 57°F
NW 12 mphPrecip: 8%
6:00pm
Dew Pt 56°F
NW 10 mphPrecip: 6%
7:00pm
Dew Pt 56°F
NW 9 mphPrecip: 3%
8:00pm
Dew Pt 56°F
NW 7 mphPrecip: 1%
9:00pm
Dew Pt 56°F
NW 6 mphPrecip: 0%
10:00pm
Dew Pt 56°F
NW 5 mphPrecip: 0%
11:00pm
Dew Pt 56°F
W 3 mphPrecip: 0%
12:00am
Dew Pt 56°F
W 3 mphPrecip: 0%
1:00am
Dew Pt 56°F
W 3 mphPrecip: 0%
2:00am
Dew Pt 56°F
W 3 mphPrecip: 0%
3:00am
Dew Pt 56°F
W 3 mphPrecip: 0%
4:00am
Dew Pt 56°F
W 5 mphPrecip: 0%
5:00am
Dew Pt 56°F
W 5 mphPrecip: 0%
6:00am
Dew Pt 56°F
W 5 mphPrecip: 0%
7:00am
Dew Pt 58°F
W 5 mphPrecip: 0%
8:00am
Dew Pt 60°F
W 6 mphPrecip: 0%
9:00am
Dew Pt 60°F
W 7 mphPrecip: 0%
10:00am
Dew Pt 58°F
W 9 mphPrecip: 0%
11:00am
Dew Pt 57°F
W 10 mphPrecip: 0%
12:00pm
Dew Pt 57°F
W 12 mphPrecip: 0%
1:00pm
Dew Pt 57°F
W 13 mphPrecip: 0%
2:00pm
Dew Pt 57°F
W 13 mphPrecip: 0%
3:00pm
Dew Pt 56°F
W 13 mphPrecip: 1%
4:00pm
Dew Pt 56°F
W 14 mphPrecip: 1%
5:00pm
Dew Pt 56°F
W 14 mphPrecip: 3%
6:00pm
Dew Pt 56°F
W 13 mphPrecip: 2%
7:00pm
Dew Pt 56°F
W 10 mphPrecip: 1%
8:00pm
Dew Pt 56°F
W 8 mphPrecip: 0%
9:00pm
Dew Pt 56°F
NW 7 mphPrecip: 0%
10:00pm
Dew Pt 56°F
NW 6 mphPrecip: 0%
11:00pm
Dew Pt 55°F
NW 5 mphPrecip: 0%
12:00am
Dew Pt 55°F
NW 5 mphPrecip: 0%
1:00am
Dew Pt 54°F
NW 5 mphPrecip: 0%
2:00am
Dew Pt 54°F
NW 5 mphPrecip: 0%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 151903
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
303 PM EDT Wed Jul 15 2026
.WHAT HAS CHANGED...
No significant changes. Monitoring sfc haze/smoke conditions for
the day as Canadian wildfire smoke continues to move in.
&&
.KEY MESSAGES...
- Hazy/smoky conditions linger.
- Dangerous rip currents expected on south-facing beaches into
this evening.
- While seasonable temperatures return for the end of the week,
chances for showers and thunderstorms begin to increase
heading into the weekend.
&&
.DISCUSSION...
KEY MESSAGE 1...Hazy/smoky conditions linger.
While hazy and smoky conditions should persists into Thursday,
the question remains about how concentrated it will be close to
the ground. Currently thinking there is not much hope of the
smoke aloft completely dissipating before Friday. Favored the
lower temperature guidance for Thursday after seeing how the
smoke affected them today. Even so, perhaps have not gone low
enough with high temperatures tomorrow.
Not much chance for showers through Thursday night. Any that do
form would likely bring more smoke to the ground, and not result
in much rainfall.
KEY MESSAGE 2...Dangerous rip currents expected on south-facing
beaches into this evening.
Wave heights continue to subside this evening, gradually
bringing an end to the threat of rip currents along the south-
facing beaches overnight. Swim near vicinity of lifeguards and
stay off jetties today.
KEY MESSAGE 3...While seasonable temperatures return for the end
of the week, chances for showers and thunderstorms begin to
increase heading into the weekend.
Seasonable temperatures return Friday as the upper level ridge
that's been dominating the region slides offshore and a cold
front ushers in a cooler airmass. 925 mb temperatures fall to
generally around 18-20C, which will be more supportive of high
temperatures in the low to mid 80s through the weekend and into
early next week.
Chances for showers and thunderstorms begin to increase heading
into the weekend as a surface low approaches Saturday, bringing
prolonged southwesterly flow and surging PWATs. Consensus is
improving that southern New England could see beneficial
rainfall Saturday into Sunday but the latest ensemble guidance
is quite spread on exactly how much precipitation could fall.
A brief spell of drier conditions is possible Monday as high
pressure builds somewhere over the Appalachian region. Chances
for showers then increase again for the middle of next week as
a surface low moves east across Ontario and a trailing cold
front sweeps through the mid-Atlantic region into New England.
&&
.AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Thursday Night: High confidence.
VFR, though hazy/smoky skies continue into Thursday. W/NW winds
around 5-10 kt tonight, then increasing with gusts to 25 kt Thu.
Light NW winds Thu night.
KBOS Terminal...High confidence.
KBDL Terminal...Moderate confidence. MVFR visibility
restrictions are possible today due to surface smoke from
Canadian wildfires.
Outlook /Friday through Monday/...
Friday through Friday Night: VFR.
Saturday: Mainly VFR, with local MVFR possible. Breezy. Chance
SHRA, slight chance TSRA.
Saturday Night: Mainly VFR, with local IFR possible. Breezy.
SHRA, chance TSRA.
Sunday: VFR. Breezy. Chance SHRA, slight chance TSRA.
Sunday Night through Monday: VFR.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Thursday Night: High confidence.
Lingering rough seas and gusty southwest winds will continue to
subside this afternoon. Will permit the Small Craft Advisories
to expire at 8 PM. Relatively light winds and seas expected into
Thursday night. There may be a few gusts up to 25 kt for a time
late morning Thursday into the afternoon. Not enough confidence
to extend a Small Craft Advisory across the southern coastal
waters at this time. That may come with later forecasts.
Otherwise, hazy/smoky sky conditions are expected through
Thursday night. Some areas of reduced visibility could be
possible due to this smoke.
Outlook /Friday through Monday/...
Friday through Friday Night: Winds less than 25 kt.
Saturday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Chance of rain showers.
Saturday Night: Moderate risk for Small Craft Advisory winds
with gusts up to 30 kt. Areas of seas approaching 5 ft. Rain
showers, chance of thunderstorms.
Sunday: Low risk for Small Craft Advisory winds with gusts up
to 30 kt. Areas of seas approaching 5 ft. Chance of rain
showers, slight chance of thunderstorms.
Sunday Night: Winds less than 25 kt. Areas of seas approaching
5 ft. Slight chance of rain showers.
Monday: Winds less than 25 kt. Seas up to 5 ft.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Air Quality Alert until midnight EDT tonight for CTZ002>004.
MA...Air Quality Alert until midnight EDT tonight for MAZ002>024-
026.
High Risk for Rip Currents until 8 PM EDT this evening for
MAZ020>024.
RI...High Risk for Rip Currents until 8 PM EDT this evening for
RIZ006>008.
Air Quality Alert until noon EDT Thursday for RIZ001>008.
MARINE...Small Craft Advisory until 8 PM EDT this evening for
ANZ232>235-237-254>256.
&&
$$
DISCUSSION...Belk/McMinn
AVIATION...Belk/McMinn
MARINE...Belk/McMinn
Radar [‒] Radar [+]
Radar images courtesy Weather Underground / Intellicast.
Satellite [‒] Satellite [+]
Satellite images courtesy Weather Underground / Intellicast.
-
GOES
East
-
Weather
Underground
Visible -
Weather
Underground
Infrared -
Weather Underground
Wundermap
(opens in new tab)
Tap Click image to go to NESDIS
Tap Click image to go to Weather Underground
Tap Click image to go to Weather Underground
UV Forecast [‒] UV Forecast [+]
UV Index forecast from the Environmental Protection Agency
UV Index forecast high for today: 6 High
Current (Estimated): 4 Medium
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:
2.48 in
July:
14.30 in
2026
Daily Extremes [‒] Daily Extremes [+]
10:52am
80.8°F
High today:
2:46am
77.0°F
Low today:
4:53pm
86.5°F
High Tuesday:
3:21am
70.5°F
Low Tuesday:
10:52am
74.5°F
High dew pt today:
3:30pm
74.1°F
High dew pt Tuesday:
10:52am
86.1°F
High heat index today:
3:51pm
94.6°F
High heat index Tuesday:
12:14am
7 mph
Wind gust today:
2:52pm
12 mph
Wind gust Tuesday:
Sun / Moon [‒] Sun / Moon [+]
First Light:
4:48am
Sunrise:
5:22am
Sunset:
8:20pm
Twilight ends:
8:54pm
Daylight length:
14 hours 59 minutes
Phase:
Waxing Crescent (3%)
Moon rise:
6:34am
Moon set:
9:31pm
Social Media - Mastodon [‒] Social Media - Mastodon [+]
© 2026, LexMAWeather
@LexMAWeather@toot.community
@LexMAWeather.toot.community.ap.brid.gy
Site development based on the USA and Meteobridge templates from
Saratoga-Weather.org.
Additional code adapted from
SE Lincoln Weather Scripts.
Weather data and images courtesy the National Weather Service, Environmental Protection Agency, AirNow, Weather Underground / Intellicast, Vaisala Xweather (formerly AerisWeather), earth.nullschool.net, Windy.com, and Leaflet/OpenStreetMap