Monthly outlook for Mahan, DE: average high 82.5°, average low 66.7°. That is 0° above the climate normal for August. Precipitation is expected on 6 days (about 1.4 inches), against a normal of 6 days and 2.3 inches. The warmest day looks like 10 August (93°), the coolest 16 August (57.3°).
82.5°/66.7°
Average high / low
+0°
Above normal
6 / 6
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
84.6°
83.1°
+0.8°
18 August – 27 August
79.1°
81.6°
-1.4°
28 August – 6 September
at normal
80.9°
—
August records over 66 years
96.1°3 August 2006All-time high
52.9°30 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Dover (12 mi).
Sun, 0992° / 72°0.01
92 °
Mahan, Sunday, 9 August
Light rain. High 92°, low 72°.
Pressure30.00 inHg
Wind8.6 mph W
Humidity51%
Visibility6.2 mi
Dew point69°
Mon, 1093° / 76°0.02
93 °
Mahan, Monday, 10 August
Light rain. High 93°, low 76°.
Pressure30.00 inHg
Wind6.3 mph NW
Humidity51%
Visibility6.2 mi
Dew point71°
Tue, 1189° / 69°0.11
89 °
Mahan, Tuesday, 11 August
Light rain. High 89°, low 69°.
Pressure29.94 inHg
Wind10.6 mph W
Humidity61%
Visibility6.2 mi
Dew point68°
Wed, 1286° / 71°0.09
86 °
Mahan, Wednesday, 12 August
Light rain. High 86°, low 71°.
Pressure29.80 inHg
Wind11.3 mph NW
Humidity60%
Visibility6.2 mi
Dew point67°
Thu, 1389° / 73°0.02
89 °
Mahan, Thursday, 13 August
Light rain. High 89°, low 73°.
Pressure29.80 inHg
Wind12.4 mph NW
Humidity45%
Visibility—
Dew point63°
Fri, 1471° / 62°0.34
71 °
Mahan, Friday, 14 August
Rain. High 71°, low 62°.
Pressure30.00 inHg
Wind6.3 mph SW
Humidity60%
Visibility—
Dew point56°
Sat, 1576° / 58°0
76 °
Mahan, Saturday, 15 August
Clear. High 76°, low 58°.
Pressure30.18 inHg
Wind11 mph N
Humidity39%
Visibility—
Dew point47°
Sun, 1679° / 57°0
79 °
Mahan, Sunday, 16 August
Clear. High 79°, low 57°.
Pressure30.27 inHg
Wind6.9 mph S
Humidity36%
Visibility—
Dew point48°
Mon, 1783° / 61°0
83 °
Mahan, Monday, 17 August
Partly cloudy. High 83°, low 61°.
Pressure30.15 inHg
Wind12.2 mph S
Humidity50%
Visibility—
Dew point60°
Tue, 1873° / 70°0.12
73 °
Mahan, Tuesday, 18 August
Light rain. High 73°, low 70°.
Pressure30.00 inHg
Wind11.7 mph S
Humidity90%
Visibility—
Dew point68°
Wed, 1985° / 68°0.2
85 °
Mahan, Wednesday, 19 August
Rain. High 85°, low 68°.
Pressure29.85 inHg
Wind11.4 mph N
Humidity47%
Visibility—
Dew point61°
Thu, 2081° / 64°0
81 °
Mahan, Thursday, 20 August
Overcast. High 81°, low 64°.
Pressure29.97 inHg
Wind7 mph NE
Humidity53%
Visibility—
Dew point56°
Fri, 2177° / 67°0.37
77 °
Mahan, Friday, 21 August
Rain. High 77°, low 67°.
Pressure29.88 inHg
Wind12.5 mph S
Humidity92%
Visibility—
Dew point71°
Sat, 2286° / 68°0.03
86 °
Mahan, Saturday, 22 August
Light rain. High 86°, low 68°.
Pressure29.77 inHg
Wind10.1 mph NW
Humidity49%
Visibility—
Dew point62°
Sun, 2373° / 60°0
73 °
Mahan, Sunday, 23 August
Partly cloudy. High 73°, low 60°.
Pressure30.03 inHg
Wind17.9 mph N
Humidity34%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 68°0.05
82 °
Mahan, Monday, 24 August
Climate normal for this date — 60-year average.
Average high82°
Average low68°
Average precipitation0.05 in
Chance of precipitation23%
Record high92° (1995)
Record low59° (1994)
Tue, 2582° / 68°0.06
82 °
Mahan, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low68°
Average precipitation0.06 in
Chance of precipitation15%
Record high94° (1968)
Record low60° (1963)
Wed, 2682° / 69°0.07
82 °
Mahan, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low69°
Average precipitation0.07 in
Chance of precipitation22%
Record high91° (1975)
Record low60° (1963)
Thu, 2783° / 70°0.14
83 °
Mahan, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low70°
Average precipitation0.14 in
Chance of precipitation33%
Record high91° (2020)
Record low59° (2025)
Fri, 2882° / 70°0.22
82 °
Mahan, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low70°
Average precipitation0.22 in
Chance of precipitation47%
Record high95° (2024)
Record low58° (2025)
Sat, 2982° / 69°0.1
82 °
Mahan, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low69°
Average precipitation0.1 in
Chance of precipitation27%
Record high93° (1973)
Record low53° (1982)
Sun, 3082° / 69°0.08
82 °
Mahan, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low69°
Average precipitation0.08 in
Chance of precipitation23%
Record high93° (1973)
Record low53° (1986)
Mon, 3182° / 69°0.07
82 °
Mahan, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low69°
Average precipitation0.07 in
Chance of precipitation23%
Record high92° (1973)
Record low55° (1986)
Tue, 0180° / 68°0.15
80 °
Mahan, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low68°
Average precipitation0.15 in
Chance of precipitation27%
Record high92° (1980)
Record low58° (1986)
Wed, 0280° / 68°0.11
80 °
Mahan, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low68°
Average precipitation0.11 in
Chance of precipitation37%
Record high94° (1980)
Record low58° (2023)
Thu, 0381° / 68°0.13
81 °
Mahan, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high81°
Average low68°
Average precipitation0.13 in
Chance of precipitation30%
Record high92° (1993)
Record low54° (1967)
Fri, 0481° / 68°0.09
81 °
Mahan, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low68°
Average precipitation0.09 in
Chance of precipitation25%
Record high95° (2023)
Record low56° (1997)
Sat, 0580° / 68°0.09
80 °
Mahan, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low68°
Average precipitation0.09 in
Chance of precipitation27%
Record high94° (2023)
Record low57° (1997)
Sun, 0680° / 67°0.18
80 °
Mahan, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low67°
Average precipitation0.18 in
Chance of precipitation33%
Record high96° (2023)
Record low56° (1962)
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 Mahan, 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 Mahan, 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.