Fire Weather Planning Forecast for Southern New England
National Weather Service Boston/Norton MA
407 AM EDT Tue Jun 9 2026
.DISCUSSION...
Dry weather continues today with much warmer high temperatures in
the 80s and 90s.
Minimum relative humidity values fall to between 27 and
40 percent for the majority of southern New England, with Cape
Cod and the Islands remaining 40 to 50 percent.
Dewpoints surge Wednesday as chances for afternoon showers,
possibly thunderstorms, begin to increase each day. Minimum RH
values are expected to increase to 50 to 60 percent across the
region Wednesday.
.OUTLOOK...Thursday through Sunday...
Chances for daily afternoon shower and thunderstorm chances
increase through at least Friday, although there is low
confidence in the potential areal coverage of the storms. A
warming trend is underway through the end of the week with daily
highs in the upper 80s to lower 90s. Expecting minimum relative
humidity values to continue increasing, between 50 and 70 percent
through Friday, before lower dewpoints return.
Southeast Middlesex MA-
Including the city of Cambridge
407 AM EDT Tue Jun 9 2026
Today Tonight Wed
Cloud Cover Mclear Mclear Pcldy
Precip Type None None Showers
Chance Precip (%) 30
Chance of Thunder (%) 0 0 0
Temp (24h trend) 87 (+10) 58 (+4) 89
RH % (24h trend) 31 (+3) 78 (-15) 45
20ft Wnd AM(mph) W 6 SW 5
20ft Wnd PM(mph) W 8 SW 6 SW 8
Precip Amount 0.00 0.00 0.05
Precip Duration 1
Precip Begin 2 PM
Precip End Continuing
Mixing Hgt (ft-AGL) 6400 470 4930
Transport Wnd (kts) W 16 SW 10 SW 17
Vent Rate (kt-ft) 102400 4700 83810
Max ADI Early 84 Good 85 Good 46 Gen Good
Max ADI Late 105 Very Good12 Poor 57 Gen Good
Max LVORI Early 1 3 2
Max LVORI Late 1 3 2
Min Vsby Early 10 10 10
Min Vsby Late 10 10 10
Sunshine Hours N/A N/A N/A
CWR 0 0 20
Remarks...None.
.FORECAST FOR DAYS 3 THROUGH 7...
.WEDNESDAY NIGHT...Mostly cloudy with a chance of showers. Lows
in the mid 60s. Southwest winds 5 to 10 mph.
.THURSDAY...Partly sunny with showers likely. Highs around 90.
West winds around 5 mph, becoming northwest in the afternoon.
.THURSDAY NIGHT...Mostly cloudy with a chance of showers. Lows in
the mid 60s. Northwest winds around 5 mph.
.FRIDAY...Partly sunny. Highs in the mid 80s. Northeast winds
around 5 mph, becoming east around 5 mph in the afternoon.
.FRIDAY NIGHT...Mostly cloudy with a chance of showers. Lows in
the lower 60s. East winds around 5 mph, becoming south after
midnight.
.SATURDAY...Mostly sunny with a chance of showers. Highs in the
mid 80s. West winds around 5 mph.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the mid 60s.
Highs around 90. West winds around 5 mph.
.SUNDAY NIGHT...Partly cloudy. Lows in the lower 60s. West winds
around 5 mph.
.MONDAY...Partly sunny with a chance of showers. Highs in the
lower 80s. North winds around 5 mph, becoming southeast around
5 mph in the afternoon.