Lexington, Massachusetts, USA
50.5°F
10.3°C
Cool
Overcast
Tonight: Lo 47 °F
Saturday: Hi 59 °F
Dew Point:
48.6°F
Humidity:
93%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.35 in
Rain Thursday: 2.72 in
Visibility: 10 miles
Wind:
Now: 2 mph
Avg: 2 mph
Gusts: 5 mph
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Fri May 23, 2025 6:14pm EDT
Low pressure moving to the Maritimes will bring a few showers at times and cool temperatures into Saturday. Mainly dry conditions Sunday into Memorial Day with a slow warming trend but still below normal temperatures, Temperatures return to more seasonable levels Tuesday through the end of the week. Our next chance for rain looks to be sometime late next week.
Rain Showers Likely
Lo 47 °F
Rain showers likely. Cloudy, with a low around 47. Southwest wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Chance Rain Showers
Hi 59 °F
A chance of rain showers. Mostly cloudy, with a high near 59. West wind 6 to 10 mph. Chance of precipitation is 30%.
Slight Chance Rain Showers then Mostly Cloudy
Lo 47 °F
A slight chance of rain showers before 7pm. Mostly cloudy, with a low around 47. West wind around 8 mph. Chance of precipitation is 20%.
Partly Sunny
Hi 65 °F
Partly sunny, with a high near 65. Northwest wind around 9 mph.
Partly Cloudy
Lo 48 °F
Partly cloudy, with a low around 48. Northwest wind around 6 mph.
Sunny
Hi 69 °F
Sunny, with a high near 69. North wind around 5 mph.
Mostly Clear
Lo 50 °F
Mostly clear, with a low around 50. Southwest wind around 3 mph.
Sunny
Hi 76 °F
Sunny, with a high near 76. West wind 2 to 6 mph.
Mostly Cloudy
Lo 54 °F
Mostly cloudy, with a low around 54. Southwest wind 2 to 6 mph.
Partly Sunny
Hi 75 °F
Partly sunny, with a high near 75. Southwest wind 2 to 7 mph.
Slight Chance Rain Showers
Lo 55 °F
A slight chance of rain showers after 7pm. Mostly cloudy, with a low around 55. Southwest wind around 7 mph.
Chance Rain Showers
Hi 75 °F
A chance of rain showers. Partly sunny, with a high near 75. Southwest wind 5 to 8 mph. Chance of precipitation is 30%.
Chance Rain Showers
Lo 57 °F
A chance of rain showers. Mostly cloudy, with a low around 57. Southwest wind around 7 mph. Chance of precipitation is 30%.
Chance Rain Showers
Hi 76 °F
A chance of rain showers. Partly sunny, with a high near 76. Southwest wind 6 to 9 mph.
Issued by:
National Weather Service Boston / Norton, MA
Updated Fri May 23, 2025 6:14pm EDT
000 FXUS61 KBOX 240222 AFDBOX Area Forecast Discussion National Weather Service Boston/Norton MA 1022 PM EDT Fri May 23 2025 .SYNOPSIS... Low pressure moving to the Maritimes will bring a few showers at times and cool temperatures into Saturday. Mainly dry conditions Sunday into Memorial Day with a slow warming trend but still below normal temperatures, Temperatures return to more seasonable levels Tuesday through the end of the week. Our next chance for rain looks to be sometime late next week. && .NEAR TERM /UNTIL 6 AM SATURDAY MORNING/... Key Messages: * Showers developing through this evening with improving conditions overnight Mainly minor tweaks this evening. Tweaked rainfall timing and and chances overnight as brunt of the showers move offshore late this evening. Not expecting much change to temperatures the rest of tonight. Previous discussion... Showers to the west will be overspreading SNE from west to east during the afternoon and evening as shortwave moves into the region. Expect scattered to numerous showers developing making for a somewhat wet evening, especially north of the south coast. Showers should lift mostly to the north by midnight as some drying moves up from the south. It should be mainly dry overnight with just a low risk of a few showers across northern MA. && .SHORT TERM /6 AM SATURDAY MORNING THROUGH SATURDAY NIGHT/... Key Messages: * Continued cool Sat with a few showers at times Saturday... Little change in the overall pattern with upper low to the north and another shortwave rotating in from the NW. With deep moisture remaining in place, expect another round of scattered showers developing especially in the afternoon, although certainly not a washout and plenty of dry periods. Temps will continue to moderate but still well below normal. Highs will reach the upper 50s to lower 60s. Saturday night... The upper low slides slowly moves east from Maine with drier NW flow developing overnight. Other than a few lingering evening showers, we are looking at a mostly dry night with partial clearing developing. Lows will be in the 40s. && .LONG TERM /SUNDAY THROUGH FRIDAY/... Key Messages: * Mostly cloudy on Sunday, but more optimism for partly to mostly sunny conditions for the Memorial Day holiday. Temps still cooler than normal. Other than a spot shower on Sunday, dry weather prevails. * Warming trend begins Tue and likely into Wed as well with high pressure in control. * Next chance of rain around Thurs-Fri but currently not looking like a significant rain event. Details: Sunday and Monday: The stubborn upper level low over the Northeast will slowly start to pull away later on Memorial Day, although lower-than-normal 500 mb heights and cooler-than-normal 925-850 mb temps will still govern conditions in Southern New England. Sunday looks to feature the most diurnally-driven cloudiness toward partly to mostly cloudy look to sky cover, and can't rule out a stray shower in northwest MA but the majority of the day is dry. Looks to be a little less RH in the column as we move into the Memorial Day holiday so more optimism on partly to mostly sunny conditions. Temps will still run about 5-10 degrees cooler than normal. Highs on Sunday in the lower to mid 60s. With a bit more sun on Monday, better chance that highs near the coast reach into the low 70s but still only in the mid 60s along the coasts. Tuesday: Warming, modifying trend back to more seasonable temperatures then looks to be in the offing as we move into Tue. High pressure at surface and shortwave ridging aloft then reasserts itself into Southern New England with dry weather and mostly sunny conditions. Highs 75-80 degrees inland and cooler lower 70s along the coasts. Wednesday into Friday: Looks like most of the 12z ensemble guidance has slowed down the arrival of our next period of more unsettled weather into Wed night and Thurs, as another upper level low moves into the Gt Lakes from the northern Plains. Wednesday could end up being generally dry but with increased cloud cover. Monitoring late next week (Thurs - Fri) for better chances at rain showers, but this is still not set in stone as 500 mb confluent flow aloft may still hold dry weather around; recent guidance has shifted the greatest QPF into the mid- Atlc region vs the Northeast. Maintained NBM with little edits to it for the time being, which feature increasing chances for rain for the Thurs-Fri timeframe but at Chance levels. Temps overall are seasonable to slightly above normal. && .AVIATION /03Z SATURDAY THROUGH WEDNESDAY/... Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Tonight: Moderate confidence. Rain showers lift northward into NH/VT between 03-05z. Some improvement in cloud bases to BKN VFR levels roughly along the Mass Pike south, with MVFR bases more likely to continue thru overnight. W/SW winds 5-10 kt. Saturday and Saturday Night...High confidence. Areas of MVFR cigs during the morning improving to VFR in the afternoon with VFR persisting Sat night. A few showers possible during the day. WNW wind gusts to 20 kt, up to 25 kt over the Islands. BOS TAF...Moderate confidence. Couldn't rule out an MVFR base thru 03z as rain showers move across, but should be largely VFR otherwise overnight. Possible hit/miss -SHRA again Sat after 17z but left as PROB30s with better chc in interior SNE. BDL TAF...Moderate confidence. BKN VFR thru tonight; ceilings then trend MVFR after 15z Sat, with hit/miss rain showers which were indicated with VCSH. Outlook /Sunday through Wednesday/... Sunday through Tuesday Night: VFR. Wednesday: VFR. Slight chance SHRA. && .MARINE... Forecaster Confidence Levels: Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. Through Saturday Night: High confidence. Rough seas over eastern MA waters will slowly subside through tonight dropping below 5 ft toward daybreak, but seas on the southern waters will build to 5 ft overnight in response to 10-20 kt westerly winds. A period of 25 kt W wind gusts possible over southern waters Sat, with WNW winds 10-20 kt Sat night. Outlook /Sunday through Wednesday/... Sunday: Winds less than 25 kt. Seas locally approaching 5 ft. Sunday Night through Tuesday Night: Winds less than 25 kt. Wednesday: Winds less than 25 kt. Slight chance of rain showers. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...None. MA...None. RI...None. MARINE...Small Craft Advisory until 6 AM EDT Saturday for ANZ250-251. Small Craft Advisory until 2 AM EDT Sunday for ANZ254>256. && $$ SYNOPSIS...KJC/Loconto NEAR TERM...Belk/KJC SHORT TERM...KJC LONG TERM...Loconto AVIATION...Belk/KJC/Loconto MARINE...KJC/Loconto
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 2 Low
Current (Estimated): 0 None
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):
0.01 in
Rain Last 60 min:
0.35 in
Rain Today:
2.72 in
Thursday:
6.80 in
May:
18.20 in
2025
3:13pm
55.8°F
High today:
3:45am
43.3°F
Low today:
12:00am
47.5°F
High Thursday:
10:49pm
43.9°F
Low Thursday:
12:28am
38.1°F
Low wind chill today:
10:03pm
38.1°F
Low wind chill Thursday:
5:03pm
48.9°F
High dew pt today:
10:32am
45.0°F
High dew pt Thursday:
1:08am
11 mph
Wind gust today:
10:03pm
12 mph
Wind gust Thursday:
No alerts/warnings active for Southeast Middlesex County.
First Light:
4:42am
Sunrise:
5:16am
Sunset:
8:08pm
Twilight ends:
8:41pm
Daylight length:
14 hours 52 minutes
Phase:
Waning Crescent (13%)
Moon rise:
2:53am
Moon set:
4:06pm