Fire Weather Planning Forecast for Southern New England
National Weather Service Boston/Norton MA
407 AM EDT Sun May 17 2026
.DISCUSSION...
Dry and unseasonably warm today followed by a brief cooldown near
the coast Monday.
Minimum relative humidity this afternoon will be 30 to
35 percent, except 45 to 55 percent along the immediate south
coast. Minimum relative humidity Wednesday will be 35 to
45 percent, except 45 to 60 percent along the south coast.
.OUTLOOK...Tuesday through Saturday...
Becoming hot with increasing humidity Tuesday and Wednesday.
Isolated interior thunderstorms possible Tuesday afternoon with a
better chance of scattered strong to severe storms Wednesday as a
cold front moves into the region. Turning cooler and drier
Thursday and Friday, then the next chance of showers will be
Friday night and Saturday as a low pressure approaches.
Southeast Middlesex MA-
Including the city of Cambridge
407 AM EDT Sun May 17 2026
Today Tonight Mon
Cloud Cover Clear Pcldy Pcldy
Precip Type None None None
Chance Precip (%)
Chance of Thunder (%) 0 0 0
Temp (24h trend) 85 (+6) 55 (-2) 76
RH % (24h trend) 31 (-5) 72 (-21) 38
20ft Wnd AM(mph) W 5 Lgt/Var
20ft Wnd PM(mph) W 9 G22 NW 5 G19 SE 7
Precip Amount 0.00 0.00 0.00
Precip Duration
Precip Begin
Precip End
Mixing Hgt (ft-AGL) 8010 420 2930
Transport Wnd (kts) W 22 E 8 SE 11
Vent Rate (kt-ft) 176220 3360 32230
Max ADI Early 84 Good 105 Very Good31 Fair
Max ADI Late 105 Very Good9 Poor 44 Gen Good
Max LVORI Early 1 3 2
Max LVORI Late 1 3 2
Min Vsby Early 9 9 9
Min Vsby Late 9 9 9
Sunshine Hours N/A N/A N/A
CWR 0 0 0
Remarks...None.
.FORECAST FOR DAYS 3 THROUGH 7...
.MONDAY NIGHT...Mostly clear. Lows in the lower 60s. South winds
around 5 mph.
.TUESDAY...Sunny. Highs in the lower 90s. Southwest winds 5 to
10 mph.
.TUESDAY NIGHT...Partly cloudy. Lows around 70. Southwest winds
5 to 10 mph.
.WEDNESDAY...Mostly sunny with showers likely. Highs in the lower
90s. Southwest winds 5 to 10 mph.
.WEDNESDAY NIGHT...Mostly cloudy with showers likely. Cooler.
Lows in the mid 50s. West winds 5 to 10 mph.
.THURSDAY THROUGH FRIDAY...Partly cloudy. Cooler. Lows 49 to 55.
Highs in the upper 60s. Southeast winds around 5 mph.
.FRIDAY NIGHT AND SATURDAY...Mostly cloudy. Lows in the upper
40s. Highs in the mid 60s. Southeast winds around 5 mph.