Fire Weather Planning Forecast for Southern New England
National Weather Service Boston/Norton MA
409 PM EDT Tue Sep 15 2026
.DISCUSSION...
Mainly sunny skies this afternoon with light NE winds 5-10 mph.
Min relative humidity values range from 45-55 percent (interior)
and 50 to 65 percent (coastal plain).
.Outlook...Tuesday through Friday...
Seasonably warm temperatures return return Wed through the end of
the week with high temps mainly in the 70s to near 80. Scattered
showers possible sometime late Thu into early Fri. Probabilities
for wetting rain lean on the lower end (~30%) due to scattered
nature of showers and greater likliehood that showers will be
light and brief.
MAZ015-
Southeast Middlesex MA-
Including the city of Cambridge
409 PM EDT Tue Sep 15 2026
Tonight Wed Wed Night Thu
Cloud Cover Mclear Pcldy Pcldy Pcldy
Precip Type None None None None
Chance Precip (%) 20
Chance of Thunder (%) 0 0 0 0
Temp (24h trend) 53 (+4) 79 (+11) 61 77
RH % (24h trend) 96 (0) 56 (+17) 100 64
20ft Wnd AM(mph) Lgt/Var Lgt/Var
20ft Wnd PM(mph) Lgt/Var SW 5 Lgt/Var Lgt/Var
Precip Amount 0.00 0.00 0.00 0.00
Precip Duration
Precip Begin
Precip End
Mixing Hgt (ft-AGL) 400 3370 410 2650
Transport Wnd (kts) SW 7 SW 10 N 5 SW 5
Vent Rate (kt-ft) 2800 33700 2050 13250
Max ADI Early 15 Gen Poor 33 Fair 22 Fair 10 Poor
Max ADI Late 4 Very Poor 48 Gen Good 4 Very Poor 9 Poor
Max LVORI Early 7 3 7 4
Max LVORI Late 7 3 7 4
Min Vsby Early 10 10 10 8
Min Vsby Late 10 10 10 9
Sunshine Hours N/A N/A N/A N/A
CWR 0 0 0 0
Remarks...None.
.FORECAST FOR DAYS 3 THROUGH 7...
.THURSDAY NIGHT...Mostly cloudy with a chance of showers. Lows in
the mid 60s. Southwest winds around 5 mph.
.FRIDAY...Mostly sunny. Highs in the mid 70s. Northwest winds
5 to 10 mph.
.FRIDAY NIGHT...Mostly clear. Cooler. Lows in the lower 50s.
North winds around 5 mph.
.SATURDAY...Mostly sunny. Highs in the upper 60s. Northeast winds
around 5 mph, becoming east in the afternoon.
.SATURDAY NIGHT...Mostly cloudy with a chance of showers. Lows in
the mid 50s. South winds around 5 mph.
.SUNDAY...Mostly cloudy with showers likely. Highs in the upper
60s. Southeast winds around 5 mph.
.SUNDAY NIGHT THROUGH TUESDAY...Mostly cloudy with a chance of
showers. Lows in the mid 50s. Highs in the upper 60s. Northeast
winds 5 to 10 mph.