Lexington Weather
Lexington, Massachusetts, USA
- Clear
-
86.2°F / 30.1°C
-
56.1°F
-
36%
- Calm, 10-min avg: Calm, gust: 9 mph
-
- 10 miles
- 0.00 in
Current Conditions [‒] Current Conditions [+]
86.2°F
30.1°C
Hot
Clear
Today: Hi 89 °F
Tonight: Lo 60 °F
Dew Point:
56.1°F
Humidity:
36%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Thursday: 0.00 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 9 mph
Forecast [‒] Forecast [+]
NWS Weather Forecast -
Today,
Tonight,
&
Saturday
through
Thursday Night
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Fri Jun 5, 2026 6:30am EDT
Overview:
- Unseasonably warm to hot temperatures continue today and Saturday with dry weather persisting.
- Increasing risk for showers and a few strong to severe thunderstorms Saturday evening. Sunday trends somewhat warmer with periods of showers and possible thundershowers.
- Dry and cooler conditions return early next week with onshore flow, before temperatures trend more summerlike by midweek.
Today:
Mostly Sunny
Hi 89 °F
Mostly sunny, with a high near 89. Southwest wind 3 to 8 mph.
Tonight:
Partly Cloudy
Lo 60 °F
Partly cloudy, with a low around 60. Southeast wind 1 to 7 mph.
Saturday:
Partly Sunny then Chance Showers And T-Storms
Hi 91 °F
A slight chance of rain showers between 1pm and 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 91. Southwest wind 2 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Saturday Night:
Chance Showers And T-Storms
Lo 66 °F
A chance of showers and thunderstorms before 10pm, then a chance of showers and thunderstorms between 10pm and 3am. Mostly cloudy, with a low around 66. Southwest wind 7 to 12 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Sunday:
Showers And T-Storms
Hi 79 °F
A chance of rain showers between 8am and 2pm, then showers and thunderstorms. Partly sunny, with a high near 79. Northwest wind 7 to 10 mph. Chance of precipitation is 90%.
Sunday Night:
Showers And T-Storms Likely then Mostly Cloudy
Lo 55 °F
Showers and thunderstorms likely before 11pm. Mostly cloudy, with a low around 55. North wind 7 to 10 mph. Chance of precipitation is 70%.
Monday:
Sunny
Hi 74 °F
Sunny, with a high near 74. Northeast wind around 9 mph.
Monday Night:
Mostly Clear
Lo 56 °F
Mostly clear, with a low around 56. Southwest wind 3 to 7 mph.
Tuesday:
Sunny
Hi 85 °F
Sunny, with a high near 85. Northwest wind 3 to 7 mph.
Tuesday Night:
Mostly Clear
Lo 62 °F
Mostly clear, with a low around 62. Southwest wind around 6 mph.
Wednesday:
Sunny
Hi 90 °F
Sunny, with a high near 90. Southwest wind 3 to 7 mph.
Wednesday Night:
Partly Cloudy
Lo 67 °F
Partly cloudy, with a low around 67. Southwest wind around 7 mph.
Thursday:
Mostly Sunny then Slight Chance Rain Showers
Hi 89 °F
A slight chance of rain showers after 2pm. Mostly sunny, with a high near 89. Southwest wind 5 to 8 mph.
Thursday Night:
Slight Chance Rain Showers then Partly Cloudy
Lo 69 °F
A slight chance of rain showers before 8pm. Partly cloudy, with a low around 69. Southwest wind 3 to 7 mph.
NWS Hourly Forecast -
Today 1pm through Sun 12am
Issued by:
National Weather Service Boston / Norton, MA
Updated Fri Jun 5, 2026 6:30am EDT
1:00pm
Dew Pt 48°F
W 5 mphPrecip: 0%
2:00pm
Dew Pt 48°F
W 5 mphPrecip: 0%
3:00pm
Dew Pt 49°F
SW 6 mphPrecip: 0%
4:00pm
Dew Pt 49°F
S 7 mphPrecip: 0%
5:00pm
Dew Pt 51°F
SE 8 mphPrecip: 0%
6:00pm
Dew Pt 53°F
SE 7 mphPrecip: 0%
7:00pm
Dew Pt 55°F
E 7 mphPrecip: 0%
8:00pm
Dew Pt 55°F
E 6 mphPrecip: 0%
9:00pm
Dew Pt 56°F
SE 5 mphPrecip: 0%
10:00pm
Dew Pt 55°F
SE 5 mphPrecip: 0%
11:00pm
Dew Pt 56°F
S 3 mphPrecip: 0%
12:00am
Dew Pt 56°F
S 2 mphPrecip: 0%
1:00am
Dew Pt 56°F
S 2 mphPrecip: 0%
2:00am
Dew Pt 55°F
S 1 mphPrecip: 0%
3:00am
Dew Pt 56°F
S 1 mphPrecip: 0%
4:00am
Dew Pt 56°F
S 1 mphPrecip: 0%
5:00am
Dew Pt 56°F
S 1 mphPrecip: 0%
6:00am
Dew Pt 55°F
S 2 mphPrecip: 0%
7:00am
Dew Pt 56°F
S 3 mphPrecip: 0%
8:00am
Dew Pt 56°F
S 3 mphPrecip: 1%
9:00am
Dew Pt 57°F
SW 6 mphPrecip: 0%
10:00am
Dew Pt 58°F
SW 7 mphPrecip: 0%
11:00am
Dew Pt 58°F
SW 8 mphPrecip: 0%
12:00pm
Dew Pt 59°F
SW 9 mphPrecip: 8%
1:00pm
Dew Pt 59°F
SW 10 mphPrecip: 16%
2:00pm
Dew Pt 60°F
SW 12 mphPrecip: 24%
Rain: 0.02 in
3:00pm
Dew Pt 61°F
SW 12 mphPrecip: 26%
Rain: 0.02 in
4:00pm
Dew Pt 61°F
SW 12 mphPrecip: 29%
Rain: 0.02 in
5:00pm
Dew Pt 62°F
SW 13 mphPrecip: 31%
Rain: 0.02 in
6:00pm
Dew Pt 63°F
Heat Index: 85°F
SW 12 mphPrecip: 34%
Rain: 0.02 in
7:00pm
Dew Pt 63°F
Heat Index: 82°F
W 10 mphPrecip: 37%
Rain: 0.02 in
8:00pm
Dew Pt 64°F
W 9 mphPrecip: 40%
9:00pm
Dew Pt 61°F
W 9 mphPrecip: 40%
10:00pm
Dew Pt 61°F
SW 8 mphPrecip: 40%
11:00pm
Dew Pt 61°F
SW 7 mphPrecip: 40%
12:00am
Dew Pt 61°F
SW 7 mphPrecip: 33%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 051054
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
654 AM EDT Fri Jun 5 2026
.WHAT HAS CHANGED...
Continue to refine summery temperatures and timing of
precipitation along with the risk for thunderstorms (some could
be severe) for this coming weekend.
&&
.KEY MESSAGES...
- Unseasonably warm to hot temperatures continue today and
Saturday with dry weather persisting.
- Increasing risk for showers and a few strong to severe
thunderstorms Saturday evening. Sunday trends somewhat warmer
with periods of showers and possible thundershowers.
- Dry and cooler conditions return early next week with onshore
flow, before temperatures trend more summerlike by midweek.
&&
.DISCUSSION...
KEY MESSAGE 1...Unseasonably warm to hot temperatures continue today
and Saturday with dry weather persisting.
There are no notable changes to the near and short-term forecast
through the daylight hours of Saturday. Confidence remains high that
dry weather continues along with unseasonably warm to hot
temperatures. As advertised over the past several days, the primary
weather feature remains an area of high pressure centered across the
southeastern CONUS, which slowly shifts offshore this weekend ahead
of more unsettled conditions. Little has changed regarding
temperatures aloft, with 850 mb values remaining between +13C and
+15C Friday and increasing to +15C to +18C Saturday. Given a well-
mixed boundary layer reaching 850-800 mb, highs should climb well
into the upper 80s to lower 90s. While temperatures aloft are warmer
Saturday, increasing moisture and cloud cover may temper daytime
heating somewhat. Nevertheless, temperatures remain well above
normal for early June, when average highs are typically in the lower
70s. A more westerly wind today should allow coastal communities to
warm efficiently, while stronger southwest flow Saturday keeps
southern coastal areas somewhat cooler, generally in the upper 70s
to lower 80s. Dewpoints remain comfortable today in the 50s but rise
into the upper 50s to lower 60s Saturday, leading to a somewhat
muggier feel, though not overly oppressive.
For those heading to the beaches, there is a moderate risk for rip
currents Saturday along east-facing beaches of Cape Cod, ocean-
facing beaches of Nantucket and Marthas Vineyard, and south-facing
beaches from Point Judith, RI to Westport, MA. Always check with
lifeguards regarding local rip current conditions.
KEY MESSAGE 2...Increasing risk for showers and a few strong to
severe thunderstorms Saturday evening. Sunday trends somewhat warmer
with periods of showers and possible thundershowers.
Confidence continues to increase that most, if not all, of the
daylight hours Saturday remain dry, though a brief afternoon shower
cannot be ruled out north and west of the I-91 corridor, likely
associated with a prefrontal trough. Increasing heat and humidity
will lead to a moderately unstable atmosphere, with CAPE values
between 500-1000 J/kg, though some guidance suggests locally higher
values approaching 1500 J/kg. This should support convective
initiation by late afternoon, though activity may hold together
after sunset given modest mid-level lapse rates around 6.5-7.5 C/km.
The better wind shear arrives Saturday evening, with 0-6 km bulk
shear increasing to around 30-40 kt. Given this setup, a marginal
risk for severe thunderstorms has been introduced for southern New
England, with the primary threats being strong to damaging straight-
line winds and locally heavy downpours as PWAT values climb to
around 1.8 inches. CAM guidance is beginning to resolve this
timeframe, though refinement in storm timing and placement is still
expected.
By Sunday morning, weak subsidence behind the front may allow for
drier, albeit humid, conditions with a mix of clouds and sunshine.
By afternoon, a more defined mid-level trough and associated
shortwave energy move across southern New England, though recent
guidance trends the surface low farther north into the Gulf of
Maine. As a result, rainfall appears more showery and less
widespread, with the greatest concentration of showers and general
thunder across eastern portions of southern New England. Cooler air
arrives more gradually, which may allow highs to still reach the
upper 70s to lower 80s before northeast flow develops later in the
day.
KEY MESSAGE 3...Dry and cooler conditions return early next week
with onshore flow, before temperatures trend more summerlike by
midweek.
Conditions trend drier and cooler Monday, though some uncertainty
remains regarding how quickly lingering troughing departs, which
will influence temperatures and cloud cover. For now, expect cooler
conditions Monday with a warming trend returning Tuesday into the
middle of next week as temperatures return into the 80s. High
pressure appears likely to return by Tuesday, supporting mainly dry
weather through midweek.
&&
.AVIATION /12Z FRIDAY THROUGH TUESDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
12z TAF Update...
Today and Tonight...High confidence.
VFR conditions continue through tonight. W winds generally 5 to
10 knots today...But with sea breezes developing along portions
of the immediate coast roughly between 15z and 17z. Winds
become light southerly/calm tonight.
Saturday...High confidence.
VFR conditions outside of an afternoon shower or t-storm.
Greater risk for scattered showers and t-storms a few of which
may be strong to severe will be after 21z/22z until about 03z
particularly across interior MA and CT. SW wind gusts of 20 to
25 knots develop by afternoon...But localized stronger wind
gusts possible in any thunderstorm.
KBOS...High confidence in TAF.
KBDL...High confidence in TAF.
Outlook /Sunday through Tuesday/...
Sunday: VFR. Breezy. Chance SHRA, isolated TSRA.
Sunday Night: Mainly VFR, with local MVFR possible. Breezy.
Slight chance SHRA.
Monday: VFR. Breezy.
Monday Night through Tuesday: VFR.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Today through Saturday...High confidence.
Today, winds remain similar to Thursdays setup, though generally
expected to remain just below Small Craft Advisory criteria across
Buzzards Bay, Vineyard Sound, and Nantucket Sound. Across the
remaining waters, winds up to 20 kt are possible through this
evening, then all waters should remain at or below 15 kt on Friday
and Friday night. Seas generally hold in the 2-4 ft range through
Friday night.
On Saturday, southwest winds increase with gusts approaching 25 kt
and seas building to 3-5 ft by early afternoon. It is becoming more
likely that Small Craft Advisory conditions will be needed Saturday
afternoon into the weekend as these conditions develop.
Outlook /Saturday Night through Tuesday/...
Saturday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft. Chance of rain showers.
Sunday: Winds less than 25 kt. Seas up to 5 ft. Chance of rain
showers.
Sunday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft. Slight chance of rain
showers.
Monday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Seas up to 5 ft.
Monday Night: Winds less than 25 kt. Seas up to 5 ft.
Tuesday: Winds less than 25 kt. Local rough seas.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.
&&
$$
DISCUSSION...Dooley
AVIATION...Frank
MARINE...Dooley
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: 8 Very High
Current (Estimated): 8 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
Thursday:
0.00 in
June:
9.88 in
2026
51.1 in
Season Snow:
Daily Extremes [‒] Daily Extremes [+]
1:25pm
86.2°F
High today:
6:17am
59.9°F
Low today:
1:31pm
87.4°F
High Thursday:
5:43am
57.9°F
Low Thursday:
11:47am
61.0°F
High dew pt today:
12:10pm
61.5°F
High dew pt Thursday:
1:25pm
86.2°F
High heat index today:
1:31pm
87.4°F
High heat index Thursday:
1:17pm
9 mph
Wind gust today:
12:41pm
6 mph
Wind gust Thursday:
Alerts / Advisories [‒] Alerts / Advisories [+]
No alerts/warnings active for Southeast Middlesex County.
Sun / Moon [‒] Sun / Moon [+]
First Light:
4:34am
Sunrise:
5:09am
Sunset:
8:18pm
Twilight ends:
8:53pm
Daylight length:
15 hours 10 minutes
Phase:
Waning Gibbous (76%)
Moon rise:
No moon rise today
Moon set:
9:35am
Social Media - Mastodon [‒] Social Media - Mastodon [+]
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