Monthly outlook for Marshtown, DE: average high 82.7°, average low 68.6°. That is 1° above the climate normal for August. Precipitation is expected on 5 days (about 0.7 inches), against a normal of 6 days and 2.4 inches. The warmest day looks like 10 August (91.3°), the coolest 15 August (60.8°).
82.7°/68.6°
Average high / low
+1°
Above normal
5 / 6
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
83.1°
81.6°
+0.9°
19 August – 28 August
81.9°
80.3°
+0.9°
29 August – 7 September
at normal
79.2°
—
August records over 66 years
95.7°15 August 2023All-time high
54.1°30 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Dewey Beach (5 mi).
Mon, 1091° / 75°0
91 °
Marshtown, Monday, 10 August
Clear. High 91°, low 75°.
Pressure30.00 inHg
Wind5.4 mph W
Humidity55%
Visibility6.2 mi
Dew point71°
Tue, 1188° / 73°0.09
88 °
Marshtown, Tuesday, 11 August
Light rain. High 88°, low 73°.
Pressure29.91 inHg
Wind5.1 mph NE
Humidity59%
Visibility6.2 mi
Dew point69°
Wed, 1286° / 73°0
86 °
Marshtown, Wednesday, 12 August
Overcast. High 86°, low 73°.
Pressure29.77 inHg
Wind16 mph W
Humidity58%
Visibility6.2 mi
Dew point68°
Thu, 1386° / 73°0.1
86 °
Marshtown, Thursday, 13 August
Light rain. High 86°, low 73°.
Pressure29.80 inHg
Wind13.6 mph NW
Humidity50%
Visibility—
Dew point64°
Fri, 1475° / 62°0
75 °
Marshtown, Friday, 14 August
Overcast. High 75°, low 62°.
Pressure30.09 inHg
Wind7.9 mph W
Humidity41%
Visibility—
Dew point49°
Sat, 1579° / 61°0
79 °
Marshtown, Saturday, 15 August
Clear. High 79°, low 61°.
Pressure30.15 inHg
Wind12.8 mph N
Humidity40%
Visibility—
Dew point51°
Sun, 1679° / 66°0
79 °
Marshtown, Sunday, 16 August
Overcast. High 79°, low 66°.
Pressure30.18 inHg
Wind8.8 mph N
Humidity38%
Visibility—
Dew point50°
Mon, 1780° / 67°0.01
80 °
Marshtown, Monday, 17 August
Light rain. High 80°, low 67°.
Pressure30.12 inHg
Wind15.3 mph S
Humidity55%
Visibility—
Dew point61°
Tue, 1876° / 67°0.19
76 °
Marshtown, Tuesday, 18 August
Light rain. High 76°, low 67°.
Pressure30.06 inHg
Wind10.6 mph SE
Humidity62%
Visibility—
Dew point61°
Wed, 1978° / 69°0.04
78 °
Marshtown, Wednesday, 19 August
Light rain. High 78°, low 69°.
Pressure29.94 inHg
Wind11.3 mph S
Humidity72%
Visibility—
Dew point65°
Thu, 2082° / 72°0.19
82 °
Marshtown, Thursday, 20 August
Rain. High 82°, low 72°.
Pressure29.71 inHg
Wind17.6 mph W
Humidity44%
Visibility—
Dew point57°
Fri, 2178° / 65°0
78 °
Marshtown, Friday, 21 August
Clear. High 78°, low 65°.
Pressure29.88 inHg
Wind17.3 mph NW
Humidity39%
Visibility—
Dew point49°
Sat, 2279° / 64°0
79 °
Marshtown, Saturday, 22 August
Mostly clear. High 79°, low 64°.
Pressure30.06 inHg
Wind9.2 mph N
Humidity38%
Visibility—
Dew point49°
Sun, 2385° / 66°0.05
85 °
Marshtown, Sunday, 23 August
Light rain. High 85°, low 66°.
Pressure30.00 inHg
Wind19.4 mph SW
Humidity53%
Visibility—
Dew point64°
Mon, 2490° / 72°0
90 °
Marshtown, Monday, 24 August
Clear. High 90°, low 72°.
Pressure29.91 inHg
Wind13 mph SW
Humidity48%
Visibility—
Dew point66°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2580° / 70°0.05
80 °
Marshtown, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low70°
Average precipitation0.05 in
Chance of precipitation18%
Record high92° (2023)
Record low62° (1994)
Wed, 2681° / 70°0.06
81 °
Marshtown, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low70°
Average precipitation0.06 in
Chance of precipitation27%
Record high89° (2016)
Record low60° (1977)
Thu, 2781° / 71°0.12
81 °
Marshtown, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high81°
Average low71°
Average precipitation0.12 in
Chance of precipitation30%
Record high92° (2020)
Record low62° (1963)
Fri, 2881° / 71°0.19
81 °
Marshtown, Friday, 28 August
Climate normal for this date — 60-year average.
Average high81°
Average low71°
Average precipitation0.19 in
Chance of precipitation43%
Record high94° (2024)
Record low58° (2025)
Sat, 2980° / 71°0.09
80 °
Marshtown, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low71°
Average precipitation0.09 in
Chance of precipitation32%
Record high91° (2018)
Record low57° (1982)
Sun, 3080° / 70°0.07
80 °
Marshtown, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low70°
Average precipitation0.07 in
Chance of precipitation28%
Record high90° (1973)
Record low54° (1986)
Mon, 3180° / 70°0.08
80 °
Marshtown, Monday, 31 August
Climate normal for this date — 60-year average.
Average high80°
Average low70°
Average precipitation0.08 in
Chance of precipitation18%
Record high90° (1991)
Record low56° (2025)
Tue, 0179° / 70°0.19
79 °
Marshtown, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low70°
Average precipitation0.19 in
Chance of precipitation37%
Record high89° (2010)
Record low59° (1986)
Wed, 0279° / 69°0.1
79 °
Marshtown, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low69°
Average precipitation0.1 in
Chance of precipitation33%
Record high90° (1980)
Record low60° (2023)
Thu, 0379° / 69°0.09
79 °
Marshtown, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low69°
Average precipitation0.09 in
Chance of precipitation32%
Record high90° (2023)
Record low59° (1967)
Fri, 0480° / 69°0.11
80 °
Marshtown, Friday, 4 September
Climate normal for this date — 60-year average.
Average high80°
Average low69°
Average precipitation0.11 in
Chance of precipitation25%
Record high93° (2023)
Record low59° (1997)
Sat, 0579° / 69°0.07
79 °
Marshtown, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low69°
Average precipitation0.07 in
Chance of precipitation30%
Record high92° (2023)
Record low60° (1994)
Sun, 0679° / 69°0.19
79 °
Marshtown, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low69°
Average precipitation0.19 in
Chance of precipitation38%
Record high93° (2023)
Record low59° (1962)
Mon, 0778° / 68°0.09
78 °
Marshtown, Monday, 7 September
Climate normal for this date — 60-year average.
Average high78°
Average low68°
Average precipitation0.09 in
Chance of precipitation28%
Record high91° (1983)
Record low59° (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 Marshtown, DE 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 Marshtown, DE 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.