Monthly outlook for Wilmington, MA: average high 80.4°, average low 62.2°. That is 0.8° above the climate normal for August. Precipitation is expected on 8 days (about 2.7 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 9 August (94.8°), the coolest 16 August (54.2°).
80.4°/62.2°
Average high / low
+0.8°
Above normal
8 / 5
Wet days / normal
2.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
83.6°
79.6°
+2.3°
18 August – 27 August
74.9°
77.7°
-1.6°
28 August – 6 September
at normal
76°
—
August records over 66 years
98.4°2 August 1975All-time high
47.7°31 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Melrose (9 mi).
Sun, 0995° / 72°0
95 °
Wilmington, Sunday, 9 August
Clear. High 95°, low 72°.
Pressure29.88 inHg
Wind10.2 mph W
Humidity37%
Visibility6.2 mi
Dew point61°
Mon, 1092° / 70°0.04
92 °
Wilmington, Monday, 10 August
Light rain. High 92°, low 70°.
Pressure29.94 inHg
Wind5.8 mph S
Humidity31%
Visibility6.2 mi
Dew point56°
Tue, 1190° / 69°0
90 °
Wilmington, Tuesday, 11 August
Partly cloudy. High 90°, low 69°.
Pressure29.77 inHg
Wind12.6 mph NW
Humidity33%
Visibility6.2 mi
Dew point54°
Wed, 1270° / 61°0.13
70 °
Wilmington, Wednesday, 12 August
Light rain. High 70°, low 61°.
Pressure29.80 inHg
Wind5 mph NE
Humidity95%
Visibility6.2 mi
Dew point62°
Thu, 1382° / 60°0.17
82 °
Wilmington, Thursday, 13 August
Light rain. High 82°, low 60°.
Pressure29.71 inHg
Wind10.9 mph NW
Humidity77%
Visibility—
Dew point65°
Fri, 1479° / 55°0
79 °
Wilmington, Friday, 14 August
Partly cloudy. High 79°, low 55°.
Pressure29.88 inHg
Wind11.4 mph NW
Humidity39%
Visibility—
Dew point44°
Sat, 1578° / 55°0
78 °
Wilmington, Saturday, 15 August
Clear. High 78°, low 55°.
Pressure30.09 inHg
Wind8.5 mph NW
Humidity37%
Visibility—
Dew point43°
Sun, 1680° / 54°0
80 °
Wilmington, Sunday, 16 August
Clear. High 80°, low 54°.
Pressure30.27 inHg
Wind8.5 mph SE
Humidity29%
Visibility—
Dew point39°
Mon, 1784° / 59°0
84 °
Wilmington, Monday, 17 August
Overcast. High 84°, low 59°.
Pressure30.18 inHg
Wind9 mph SW
Humidity31%
Visibility—
Dew point44°
Tue, 1874° / 64°0.58
74 °
Wilmington, Tuesday, 18 August
Rain. High 74°, low 64°.
Pressure30.03 inHg
Wind9.5 mph SW
Humidity99%
Visibility—
Dew point65°
Wed, 1977° / 63°0.05
77 °
Wilmington, Wednesday, 19 August
Light rain. High 77°, low 63°.
Pressure29.85 inHg
Wind4.4 mph N
Humidity60%
Visibility—
Dew point60°
Thu, 2076° / 62°0.01
76 °
Wilmington, Thursday, 20 August
Light rain. High 76°, low 62°.
Pressure30.00 inHg
Wind7.8 mph SE
Humidity61%
Visibility—
Dew point58°
Fri, 2177° / 61°0.85
77 °
Wilmington, Friday, 21 August
Heavy rain. High 77°, low 61°.
Pressure30.00 inHg
Wind10.5 mph S
Humidity55%
Visibility—
Dew point57°
Sat, 2273° / 63°0.83
73 °
Wilmington, Saturday, 22 August
Rain. High 73°, low 63°.
Pressure29.77 inHg
Wind8.5 mph S
Humidity93%
Visibility—
Dew point68°
Sun, 2372° / 56°0
72 °
Wilmington, Sunday, 23 August
Clear. High 72°, low 56°.
Pressure29.77 inHg
Wind14.1 mph NW
Humidity45%
Visibility—
Dew point44°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2477° / 62°0.08
77 °
Wilmington, Monday, 24 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.08 in
Chance of precipitation25%
Record high90° (1998)
Record low52° (1971)
Tue, 2577° / 62°0.12
77 °
Wilmington, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.12 in
Chance of precipitation28%
Record high93° (2007)
Record low54° (1971)
Wed, 2679° / 62°0.06
79 °
Wilmington, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.06 in
Chance of precipitation18%
Record high92° (2021)
Record low52° (1981)
Thu, 2778° / 63°0.09
78 °
Wilmington, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.09 in
Chance of precipitation32%
Record high94° (1993)
Record low52° (2019)
Fri, 2878° / 64°0.11
78 °
Wilmington, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low64°
Average precipitation0.11 in
Chance of precipitation30%
Record high93° (2018)
Record low54° (1986)
Sat, 2976° / 63°0.17
76 °
Wilmington, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high76°
Average low63°
Average precipitation0.17 in
Chance of precipitation30%
Record high94° (2018)
Record low48° (1982)
Sun, 3078° / 62°0.14
78 °
Wilmington, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.14 in
Chance of precipitation23%
Record high91° (1973)
Record low48° (1965)
Mon, 3177° / 62°0.07
77 °
Wilmington, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.07 in
Chance of precipitation23%
Record high91° (2010)
Record low48° (1965)
Tue, 0176° / 61°0.06
76 °
Wilmington, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.06 in
Chance of precipitation23%
Record high92° (2010)
Record low51° (1975)
Wed, 0275° / 60°0.15
75 °
Wilmington, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.15 in
Chance of precipitation25%
Record high92° (2010)
Record low49° (2017)
Thu, 0375° / 61°0.13
75 °
Wilmington, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high75°
Average low61°
Average precipitation0.13 in
Chance of precipitation33%
Record high93° (2018)
Record low51° (1967)
Fri, 0476° / 61°0.12
76 °
Wilmington, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.12 in
Chance of precipitation22%
Record high89° (1973)
Record low51° (1987)
Sat, 0575° / 60°0.08
75 °
Wilmington, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.08 in
Chance of precipitation17%
Record high89° (1971)
Record low50° (1994)
Sun, 0674° / 60°0.16
74 °
Wilmington, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high74°
Average low60°
Average precipitation0.16 in
Chance of precipitation33%
Record high94° (2018)
Record low50° (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 Wilmington, 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 Wilmington, 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.