Lexington Weather

Lexington, Massachusetts, USA

69°F

6/8/2026 11:12am

Lexington Conditions: Clear
Temperature: 68.5°F / 20.3°C
Dew Point: 53.2°F
Relative Humidity: 58%
Wind: Calm, 10-min avg: Calm, gust: None
Barometer: 30.19 in Steady
Visibility: 10 miles
Rain Today: 0.01 in

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 020000
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
800 PM EDT Mon Jun 1 2026

.WHAT HAS CHANGED...
No significant changes to the forecast.

&&

.KEY MESSAGES...
- A few scattered showers possible both this afternoon and
  Tuesday afternoon. Tuesday begins a pattern of steadily
  climbing temperatures each day through the week. 

- Forecast confidence decreases for late this week. Conditions
  more likely to be dry and warm, but we continue to monitor the
  potential for an offshore system to bring showers this
  weekend.

&&

.DISCUSSION...
KEY MESSAGE 1...A few scattered showers possible both this
afternoon and Tuesday afternoon. Tuesday begins a pattern of 
steadily climbing temperatures each day through the week. 

The synoptic pattern continues to feature a broad upper trough 
lingering over the Northeast with the associated cold pool
leading to widespread diurnal cloudcover over inland areas, 
and even some decent pop-up shower coverage over western and 
central SNE. This activity will continue through sundown when 
skies quickly clear setting up for a good radiational cooling 
night. Given building surface high pressure leading to calm 
winds and clear skies overnight, the forecast has been trended 
toward the cooler MOS guidance. We're expecting lows in the 
upper 30s/low 40s in the typical cold spots, closer to 50 in the
urban centers. 

Tuesday features a transition from the broader trough we've
dealt with the last several days to a building mid level 
ridge. As such, we expect warm advection and clear to mostly 
sunny skies to lead to highs well into the 70s. That being said,
a weak disturbance rounding the base of the exiting trough will
be enough to once again kick off a few diurnal showers and even
a thunderstorm given a few hundred J/kg of elevated CAPE. 
Expect the most sun in the morning before low level diurnal 
clouds and some mid/high clouds filter in in the afternoon. 

KEY MESSAGE 2...Forecast confidence decreases for late this
week. Conditions more likely to be dry and warm, but we 
continue to monitor the potential for an offshore system to 
bring showers this weekend.

Mid level omega block expected to start breaking down Wednesday
into Friday. The mid level flow at that point should remain 
rather amplified for an early meteorological summer pattern. 
There are significant timing differences in how short this 
breakdown process will be, which is not all that unusual. These 
details matter, and will take a more probabilistic approach with
the forecast from Wednesday on. 

Overall, it appears that southern New England finally edges more 
into the higher heights part of the block around Wednesday, with
a surface high pressure over the Great Lakes. Expecting dry 
weather with warmer conditions Wednesday into Friday. 

The forecast this weekend into early next week is more
problematic. Much will depend on how quickly the aforementioned 
omega block breaks. At this time, there is a chance that we 
remain dry for most of the day Saturday. However, there are also
enough signals where a mention of scattered afternoon showers 
is warranted. A low pressure passing by along a nearly stalled 
front for Sunday is a more favorable pattern for showers. This 
front could linger into Monday, continuing the risk for some 
showers. 

Temperatures should start to lower Saturday, but the cooldown is 
anticipated to be more noticeable Sunday into Monday.

&&

.AVIATION /00Z TUESDAY THROUGH SATURDAY/...
Forecaster Confidence Levels...

Low - less than 30 percent.
Moderate - 30 to 60 percent. 
High - greater than 60 percent.

Tonight...High Confidence. 

VFR. Light to calm winds.

Tuesday...High Confidence. 

VFR. NE 5-10 kts for inland terminals with sea breezes along the
coast. 

KBOS...High confidence in TAF. 

KBDL...High confidence in TAF.

Outlook /Wednesday through Saturday/...

Wednesday through Thursday Night: VFR. 

Friday: VFR. Breezy. 

Friday Night through Saturday: VFR.

&&

.MARINE...
Forecaster Confidence Levels...

Low - less than 30 percent. 
Moderate - 30 to 60 percent. 
High - greater than 60 percent.

Through Tuesday Night...High Confidence. 

NE winds 5-10 kts this afternoon become light and variable
overnight. Winds then increase Tuesday, 5-10 kts out of the 
SW. Seas generally 3-4 ft this afternoon will continue to 
decrease becoming 1-3 ft overnight and continuing through at 
least mid week. 

Outlook /Wednesday through Saturday/...

Wednesday: Winds less than 25 kt. 

Wednesday Night: Winds less than 25 kt. Seas locally
approaching 5 ft. 

Thursday: Winds less than 25 kt. Areas of seas approaching
5 ft. 

Thursday Night through Saturday: Winds less than 25 kt. Seas up
to 5 ft.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.

&&

$$

DISCUSSION...Belk/BW
AVIATION...Belk/BW
MARINE...Belk/BW