Monthly outlook for Winthrop, MA: average high 78.8°, average low 65.1°. That is 0.8° above the climate normal for August. Precipitation is expected on 7 days (about 5.0 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 9 August (95.5°), the coolest 16 August (60.2°).
78.8°/65.1°
Average high / low
+0.8°
Above normal
7 / 5
Wet days / normal
5.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
82.4°
78°
+2.4°
18 August – 27 August
72.8°
76.3°
-1.9°
28 August – 6 September
at normal
74.7°
—
August records over 66 years
95.9°2 August 2006All-time high
48.9°30 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Revere (3 mi).
Sun, 0995° / 73°0
95 °
Winthrop, Sunday, 9 August
Clear. High 95°, low 73°.
Pressure29.88 inHg
Wind10.4 mph W
Humidity39%
Visibility6.2 mi
Dew point61°
Mon, 1089° / 71°0.06
89 °
Winthrop, Monday, 10 August
Light rain. High 89°, low 71°.
Pressure29.94 inHg
Wind5.3 mph SE
Humidity39%
Visibility6.2 mi
Dew point58°
Tue, 1189° / 71°0
89 °
Winthrop, Tuesday, 11 August
Partly cloudy. High 89°, low 71°.
Pressure29.77 inHg
Wind12.2 mph NW
Humidity35%
Visibility6.2 mi
Dew point55°
Wed, 1273° / 64°0.57
73 °
Winthrop, Wednesday, 12 August
Rain. High 73°, low 64°.
Pressure29.77 inHg
Wind8.1 mph E
Humidity93%
Visibility6.2 mi
Dew point63°
Thu, 1377° / 62°0.35
77 °
Winthrop, Thursday, 13 August
Light rain. High 77°, low 62°.
Pressure29.71 inHg
Wind10.6 mph W
Humidity73%
Visibility—
Dew point65°
Fri, 1479° / 60°0
79 °
Winthrop, Friday, 14 August
Overcast. High 79°, low 60°.
Pressure29.88 inHg
Wind10 mph W
Humidity43%
Visibility—
Dew point46°
Sat, 1575° / 61°0
75 °
Winthrop, Saturday, 15 August
Clear. High 75°, low 61°.
Pressure30.09 inHg
Wind9.3 mph SE
Humidity41%
Visibility—
Dew point46°
Sun, 1676° / 60°0
76 °
Winthrop, Sunday, 16 August
Clear. High 76°, low 60°.
Pressure30.27 inHg
Wind10.5 mph S
Humidity35%
Visibility—
Dew point43°
Mon, 1782° / 62°0
82 °
Winthrop, Monday, 17 August
Overcast. High 82°, low 62°.
Pressure30.21 inHg
Wind12 mph SW
Humidity35%
Visibility—
Dew point46°
Tue, 1872° / 66°1.55
72 °
Winthrop, Tuesday, 18 August
Heavy rain. High 72°, low 66°.
Pressure30.03 inHg
Wind12.1 mph S
Humidity97%
Visibility—
Dew point65°
Wed, 1973° / 65°0
73 °
Winthrop, Wednesday, 19 August
Partly cloudy. High 73°, low 65°.
Pressure29.85 inHg
Wind6.8 mph E
Humidity73%
Visibility—
Dew point63°
Thu, 2073° / 65°0
73 °
Winthrop, Thursday, 20 August
Overcast. High 73°, low 65°.
Pressure30.00 inHg
Wind8.5 mph E
Humidity67%
Visibility—
Dew point59°
Fri, 2175° / 63°0.94
75 °
Winthrop, Friday, 21 August
Heavy rain. High 75°, low 63°.
Pressure30.00 inHg
Wind10.6 mph S
Humidity62%
Visibility—
Dew point59°
Sat, 2274° / 66°1.39
74 °
Winthrop, Saturday, 22 August
Heavy rain. High 74°, low 66°.
Pressure29.77 inHg
Wind11.3 mph S
Humidity94%
Visibility—
Dew point69°
Sun, 2371° / 60°0
71 °
Winthrop, Sunday, 23 August
Clear. High 71°, low 60°.
Pressure29.77 inHg
Wind14.5 mph W
Humidity52%
Visibility—
Dew point47°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2476° / 63°0.08
76 °
Winthrop, Monday, 24 August
Climate normal for this date — 60-year average.
Average high76°
Average low63°
Average precipitation0.08 in
Chance of precipitation27%
Record high88° (1998)
Record low53° (1971)
Tue, 2576° / 63°0.12
76 °
Winthrop, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high76°
Average low63°
Average precipitation0.12 in
Chance of precipitation28%
Record high91° (1969)
Record low55° (1971)
Wed, 2677° / 63°0.06
77 °
Winthrop, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high77°
Average low63°
Average precipitation0.06 in
Chance of precipitation18%
Record high88° (1993)
Record low53° (1981)
Thu, 2777° / 64°0.09
77 °
Winthrop, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high77°
Average low64°
Average precipitation0.09 in
Chance of precipitation32%
Record high91° (1993)
Record low54° (1989)
Fri, 2876° / 64°0.11
76 °
Winthrop, Friday, 28 August
Climate normal for this date — 60-year average.
Average high76°
Average low64°
Average precipitation0.11 in
Chance of precipitation30%
Record high92° (2018)
Record low55° (1986)
Sat, 2975° / 64°0.17
75 °
Winthrop, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high75°
Average low64°
Average precipitation0.17 in
Chance of precipitation30%
Record high93° (2018)
Record low49° (1982)
Sun, 3076° / 63°0.14
76 °
Winthrop, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high76°
Average low63°
Average precipitation0.14 in
Chance of precipitation22%
Record high89° (1973)
Record low49° (1965)
Mon, 3176° / 62°0.07
76 °
Winthrop, Monday, 31 August
Climate normal for this date — 60-year average.
Average high76°
Average low62°
Average precipitation0.07 in
Chance of precipitation23%
Record high89° (2010)
Record low49° (1965)
Tue, 0174° / 62°0.05
74 °
Winthrop, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high74°
Average low62°
Average precipitation0.05 in
Chance of precipitation23%
Record high89° (2010)
Record low53° (1975)
Wed, 0274° / 61°0.16
74 °
Winthrop, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.16 in
Chance of precipitation25%
Record high90° (2010)
Record low50° (2017)
Thu, 0374° / 62°0.13
74 °
Winthrop, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high74°
Average low62°
Average precipitation0.13 in
Chance of precipitation33%
Record high92° (2018)
Record low51° (1967)
Fri, 0474° / 62°0.12
74 °
Winthrop, Friday, 4 September
Climate normal for this date — 60-year average.
Average high74°
Average low62°
Average precipitation0.12 in
Chance of precipitation22%
Record high86° (1973)
Record low52° (1987)
Sat, 0574° / 61°0.08
74 °
Winthrop, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.08 in
Chance of precipitation18%
Record high87° (1971)
Record low51° (1994)
Sun, 0673° / 61°0.15
73 °
Winthrop, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high73°
Average low61°
Average precipitation0.15 in
Chance of precipitation33%
Record high94° (2018)
Record low51° (1965)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Winthrop, MA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Winthrop, MA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.