Lexington Weather
Lexington, Massachusetts, USA
- Few Clouds
-
80.1°F / 26.7°C
-
58.1°F
- 80.6°F
-
47%
-
SSW 1 mph, 10-min avg: Calm, gust: 3 mph
- 10 miles
- 0.00 in
Current Conditions [‒] Current Conditions [+]
80.1°F
26.7°C
Feels like 80.6°F
Hot
Few Clouds
Today: Hi 82 °F
Tonight: Lo 64 °F
Dew Point:
58.1°F
Humidity:
47%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Wednesday: 0.01 in
Visibility: 10 miles
Wind:
Now: 1 mph
Avg: Calm
Gusts: 3 mph
Forecast [‒] Forecast [+]
NWS Weather Forecast -
Today,
Tonight,
&
Friday
through
Wednesday Night
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Thu Jun 25, 2026 10:10am EDT
Overview:
- Dry weather for much of today before the risk for scattered showers and a few thunderstorms returns tonight into Friday.
- Showers Saturday followed by a warming and drying trend that carries into next week.
Today:
Partly Sunny
Hi 82 °F
Partly sunny, with a high near 82. Southwest wind around 6 mph.
Tonight:
Mostly Cloudy then Scattered Rain Showers
Lo 64 °F
Scattered rain showers after 1am. Mostly cloudy, with a low around 64. Southwest wind 2 to 6 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Friday:
Scattered Rain Showers then Scattered Showers And T-Storms
Hi 78 °F
Scattered rain showers before 2pm, then scattered showers and thunderstorms. Partly sunny, with a high near 78. Southwest wind 6 to 9 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Friday Night:
Scattered Showers And T-Storms
Lo 66 °F
Scattered showers and thunderstorms. Mostly cloudy, with a low around 66. West wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Saturday:
Chance Rain Showers
Hi 79 °F
A chance of rain showers. Partly sunny, with a high near 79. Northeast wind around 6 mph. Chance of precipitation is 30%.
Saturday Night:
Chance Rain Showers then Partly Cloudy
Lo 59 °F
A chance of rain showers before 9pm. Partly cloudy, with a low around 59. Northeast wind around 5 mph. Chance of precipitation is 30%.
Sunday:
Mostly Sunny
Hi 82 °F
Mostly sunny, with a high near 82. Northeast wind around 6 mph.
Sunday Night:
Mostly Clear
Lo 62 °F
Mostly clear, with a low around 62. South wind around 5 mph.
Monday:
Mostly Sunny
Hi 87 °F
Mostly sunny, with a high near 87. Northeast wind 2 to 6 mph.
Monday Night:
Partly Cloudy
Lo 66 °F
Partly cloudy, with a low around 66. South wind around 6 mph.
Tuesday:
Mostly Sunny then Slight Chance Showers And T-Storms
Hi 90 °F
A slight chance of rain showers between 1pm and 2pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Southwest wind 3 to 8 mph.
Tuesday Night:
Slight Chance Showers And T-Storms
Lo 68 °F
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. Southwest wind 3 to 7 mph.
Wednesday:
Slight Chance Rain Showers
Hi 91 °F
A slight chance of rain showers. Mostly sunny, with a high near 91. Southeast wind 5 to 8 mph.
Wednesday Night:
Slight Chance Rain Showers
Lo 69 °F
A slight chance of rain showers. Partly cloudy, with a low around 69. South wind around 7 mph.
NWS Hourly Forecast -
Today 1pm through Sat 12am
Issued by:
National Weather Service Boston / Norton, MA
Updated Thu Jun 25, 2026 10:10am EDT
1:00pm
Dew Pt 56°F
W 6 mphPrecip: 1%
2:00pm
Dew Pt 56°F
Heat Index: 82°F
W 6 mphPrecip: 1%
3:00pm
Dew Pt 56°F
SW 6 mphPrecip: 1%
4:00pm
Dew Pt 56°F
SW 6 mphPrecip: 1%
5:00pm
Dew Pt 57°F
Heat Index: 82°F
SW 6 mphPrecip: 1%
6:00pm
Dew Pt 58°F
SW 5 mphPrecip: 2%
7:00pm
Dew Pt 59°F
SW 5 mphPrecip: 2%
8:00pm
Dew Pt 60°F
S 2 mphPrecip: 8%
9:00pm
Dew Pt 59°F
S 5 mphPrecip: 9%
10:00pm
Dew Pt 59°F
S 6 mphPrecip: 12%
11:00pm
Dew Pt 59°F
S 6 mphPrecip: 12%
12:00am
Dew Pt 59°F
S 6 mphPrecip: 14%
1:00am
Dew Pt 59°F
S 6 mphPrecip: 16%
2:00am
Dew Pt 59°F
S 6 mphPrecip: 34%
Rain: 0.01 in
3:00am
Dew Pt 59°F
S 6 mphPrecip: 38%
Rain: 0.01 in
4:00am
Dew Pt 59°F
S 6 mphPrecip: 45%
Rain: 0.01 in
5:00am
Dew Pt 59°F
S 6 mphPrecip: 51%
Rain: 0.01 in
6:00am
Dew Pt 60°F
S 6 mphPrecip: 43%
Rain: 0.01 in
7:00am
Dew Pt 61°F
S 6 mphPrecip: 51%
Rain: 0.01 in
8:00am
Dew Pt 63°F
S 6 mphPrecip: 43%
Rain: 0.02 in
9:00am
Dew Pt 65°F
S 7 mphPrecip: 34%
Rain: 0.01 in
10:00am
Dew Pt 65°F
S 8 mphPrecip: 37%
Rain: 0.02 in
11:00am
Dew Pt 66°F
S 9 mphPrecip: 36%
Rain: 0.02 in
12:00pm
Dew Pt 67°F
S 9 mphPrecip: 36%
Rain: 0.02 in
1:00pm
Dew Pt 67°F
S 9 mphPrecip: 35%
Rain: 0.02 in
2:00pm
Dew Pt 68°F
SW 9 mphPrecip: 37%
Rain: 0.01 in
3:00pm
Dew Pt 68°F
SW 9 mphPrecip: 36%
Rain: 0.01 in
4:00pm
Dew Pt 68°F
SW 8 mphPrecip: 31%
Rain: 0.01 in
5:00pm
Dew Pt 68°F
SW 8 mphPrecip: 26%
Rain: 0.01 in
6:00pm
Dew Pt 68°F
SW 6 mphPrecip: 27%
Rain: 0.01 in
7:00pm
Dew Pt 67°F
SW 5 mphPrecip: 27%
Rain: 0.01 in
8:00pm
Dew Pt 67°F
SW 5 mphPrecip: 27%
9:00pm
Dew Pt 66°F
SW 3 mphPrecip: 25%
10:00pm
Dew Pt 65°F
SW 3 mphPrecip: 23%
11:00pm
Dew Pt 64°F
W 3 mphPrecip: 21%
12:00am
Dew Pt 63°F
W 3 mphPrecip: 22%
FORECAST DISCUSSION
Area Forecast Discussion
for Boston / Norton, MA
000
FXUS61 KBOX 250719
AFDBOX
Area Forecast Discussion
National Weather Service Boston/Norton MA
319 AM EDT Thu Jun 25 2026
.WHAT HAS CHANGED...
Increase in confidence regarding the overall severe weather risk
Friday.
&&
.KEY MESSAGES...
- Dry weather for much of today before the risk for scattered
showers and a few thunderstorms returns tonight into Friday.
- Showers Saturday followed by a warming and drying trend that
carries into next week.
&&
.DISCUSSION...
KEY MESSAGE 1...Dry weather for much of today before the risk for
scattered showers and a few thunderstorms returns tonight into
Friday.
High pressure continues to dominate for much of the day today,
continuing the drier weather we saw yesterday. Highs will reach once
more into the 80s and upper 70s.
The pattern changes as we head into tonight and Friday. A warm front
associated with a surface low whose center will track through
southern Ontario into Quebec will cross over the region. With it, a
line of showers with some embedded thunder will be likely,
progressing over the region from west to east. With regards to
thunder and the risk for severe storms, that risk is quite low due
to the lack of instability present overnight as indicated by the
latest CAMs. Some embedded rumbles of thunder over western MA aren't
out of the question, though. The main concern for any storms turning
severe is towards Friday afternoon/evening.
As the warm front moves through, winds shift more southerly and
dewpoints climb into the mid to upper 60s. Compared to Thursday, it
may feel slightly more humid as a result. Previous model runs have
not been in much agreement regarding the development of instability
over the region, though they have been supportive of good jet
dynamics with >40 kt of effective bulk shear. However, with the
latest runs, more of a consensus has been reached with increased
instability in the afternoon. A number of CAMs are favoring around
1000 J/kg of MUCAPE with areas of 1500 J/kg of MUCAPE in western MA
and CT. MLCAPE values in these models are not far behind them, and
effective bulk shear ranges between 40-50 kt. All of this combined
with the forcing that will come with the aforementioned low's cold
front could aid in the development of isolated to scattered severe
storms. It is worth noting that southern New England is also under a
Marginal (1/5) risk for severe weather Friday. Continue to check
back for updates regarding this risk.
KEY MESSAGE 2...Showers Saturday followed by a warming and drying
trend that carries into next week.
Another wave of low pressure is expected to track to our south
Saturday. Some showers associated with this wave are more likely to
scrape along the south coast into the Cape and Islands, but they are
not expected to be very significant at this time. Aside from these
showers, dry weather is expected to return heading into the start of
next week as high pressure associated with an amplified upper level
ridge moves into southern New England. A warming trend also kicks
off for the start of the work week, continuing into midweek.
However, details on just how warm it may get are still uncertain at
this time. The outlook for hazardous temperatures next week keep the
elevated risks to our SW, but we will see how this evolves as we get
closer in time.
&&
.AVIATION /07Z THURSDAY THROUGH MONDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent. Moderate - 30 to 60 percent. High -
greater than 60 percent.
06Z TAF Update...
Through this afternoon...High confidence.
VFR with southwesterly winds 10 kts, or less. There is a
potential for a localized sea breeze to develop across portions
of the immediate coast this afternoon.
Tonight...Moderate confidence.
Chances for showers and thunderstorms after 00z tonight increase
from W to E. The greatest risk for isolated thunderstorms
remains in western MA between 06z-12z. Included a PROB30 for BDL
to account for this risk. VFR ceilings steadily drop to MVFR and
even IFR heading into Friday morning. Fog along the south coast
and into SE MA is also likely overnight.
Friday...Moderate confidence.
Showers expected in the morning hours, then the risk for
isolated thunderstorms picks back up in the afternoon. However,
coverage of possible storms for the afternoon period is still
uncertain. Generally lower-end VFR through much of the day
expected with areas of MVFR not out of the question.
KBOS Terminal...High confidence in TAF.
KBDL Terminal...High confidence in TAF.
Outlook /Friday Night through Monday/...
Friday Night: VFR. Slight chance SHRA.
Saturday: VFR. Chance SHRA.
Saturday Night through Monday: VFR.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent. Moderate - 30 to 60 percent. High -
greater than 60 percent.
Through Friday...High confidence.
Expect winds to remain generally light through this afternoon,
before becoming a little breezy (gusts possible up to 20 kt)
Friday afternoon. SSW winds also shift more S-ly tonight into
Friday. Seas should remain 2 to 4 ft. Showers and thunderstorms
may start to impact the waters Thursday night into Friday.
Outlook /Friday Night through Monday/...
Friday Night: Winds less than 25 kt. Slight chance of rain
showers.
Saturday through Saturday Night: Winds less than 25 kt. Chance
of rain showers.
Sunday through Monday: Winds less than 25 kt.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.
&&
$$
DISCUSSION...Hrencecin
AVIATION...Hrencecin
MARINE...Hrencecin
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:
0.01 in
Wednesday:
1.81 in
June:
11.69 in
2026
51.1 in
Season Snow:
Daily Extremes [‒] Daily Extremes [+]
12:58pm
80.1°F
High today:
6:07am
59.5°F
Low today:
1:45pm
79.9°F
High Wednesday:
6:21am
60.4°F
Low Wednesday:
12:28pm
63.7°F
High dew pt today:
10:12am
65.3°F
High dew pt Wednesday:
1:01pm
81.3°F
High heat index today:
11:39am
5 mph
Wind gust today:
5:36pm
9 mph
Wind gust Wednesday:
Alerts / Advisories [‒] Alerts / Advisories [+]
No alerts/warnings active for Southeast Middlesex County.
Sun / Moon [‒] Sun / Moon [+]
First Light:
4:34am
Sunrise:
5:09am
Sunset:
8:26pm
Twilight ends:
9:01pm
Daylight length:
15 hours 17 minutes
Phase:
Waxing Gibbous (84%)
Moon set:
1:43am
Moon rise:
4:58pm
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