Fire Weather Planning Forecast for Southern New England
National Weather Service Boston/Norton MA
409 PM EDT Fri Jun 26 2026
.DISCUSSION...
Scattered showers and thunderstorms possible into this evening,
possibly lingering into Saturday. Additional scattered showers
possible Sunday as well. Localized areas of wetting rain, with
most areas missing out on the heavier rainfall.
Minimum relative humidity values on Saturday falling to between
45- 65 percent across the interior and 70-80 percent along the
coast. A little less humid Sunday, with minimum relative humidity
values between 35-55 percent across the interior and
65-80 percent across the Cape and islands.
.OUTLOOK...Sunday Night through Wednesday...
High pressure builds in Sunday Night into Monday. Expecting
increasing heat and humidity most of next week, the some threat
of hazardous heat. Unsettled weather may make a return some time
between Tuesday and Thursday.
MAZ015-
Southeast Middlesex MA-
Including the city of Cambridge
409 PM EDT Fri Jun 26 2026
Tonight Sat Sat Night Sun
Cloud Cover Mcldy Pcldy Pcldy Pcldy
Precip Type Tstms Showers Showers None
Chance Precip (%) 40 20 20 10
Chance of Thunder (%) 40 0 0 0
Temp (24h trend) 60 (-5) 78 (+1) 59 83
RH % (24h trend) 100 (0) 54 (+21) 100 53
20ft Wnd AM(mph) Lgt/Var Lgt/Var
20ft Wnd PM(mph) Lgt/Var Lgt/Var Lgt/Var Lgt/Var
Precip Amount 0.07 0.02 0.01 0.00
Precip Duration 1 1 1
Precip Begin 6 PM 12 PM Continuing
Precip End 11 PM Continuing 11 PM
Mixing Hgt (ft-AGL) 400 4710 390 4470
Transport Wnd (kts) NW 6 SE 6 E 5 NE 9
Vent Rate (kt-ft) 2400 28260 1950 40230
Max ADI Early 35 Fair 28 Fair 17 Gen Poor 33 Fair
Max ADI Late 7 Poor 37 Fair 5 Very Poor 52 Gen Good
Max LVORI Early 9 2 7 2
Max LVORI Late 9 2 7 2
Min Vsby Early 8 8 9 7
Min Vsby Late 7 9 6 Fog 9
Sunshine Hours N/A N/A N/A N/A
CWR 20 10 10 0
Remarks...None.
.FORECAST FOR DAYS 3 THROUGH 7...
.SUNDAY NIGHT...Partly cloudy. Lows in the lower 60s. Southeast
winds around 5 mph, becoming west after midnight.
.MONDAY...Sunny. Highs in the mid 80s. North winds around 5 mph,
becoming east around 5 mph in the afternoon.
.MONDAY NIGHT...Mostly clear. Lows in the mid 60s. South winds
around 5 mph.
.TUESDAY...Mostly sunny. Highs around 90. Southwest winds around
5 mph.
.TUESDAY NIGHT...Mostly cloudy with a chance of showers. Lows in
the upper 60s. South winds around 5 mph.
.WEDNESDAY...Mostly sunny with a chance of showers. Highs in the
upper 80s. South winds around 5 mph.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower
70s. Highs in the lower 90s. West winds around 5 mph.
.THURSDAY NIGHT...Mostly clear. Lows in the mid 70s. West winds
around 5 mph.
.FRIDAY...Mostly sunny with a chance of showers. Highs around 90.
Northwest winds around 5 mph.