Monthly outlook for Manchester, SD: average high 87.3°, average low 60.8°. That is 3.6° above the climate normal for August. Precipitation is expected on 6 days (about 1.0 inches), against a normal of 4 days and 1.6 inches. The warmest day looks like 10 August (99.1°), the coolest 21 August (54.5°).
87.3°/60.8°
Average high / low
+3.6°
Above normal
6 / 4
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
88.7°
80.9°
+4.3°
19 August – 28 August
85°
80.7°
+2.4°
29 August – 7 September
at normal
78.7°
—
August records over 66 years
102.9°13 August 1965All-time high
45.7°31 August 1987All-time low
Climate normals and records are computed from the nearest reference point — Bancroft (8 mi).
Mon, 1099° / 61°0.17
99 °
Manchester, Monday, 10 August
Rain. High 99°, low 61°.
Pressure29.80 inHg
Wind10 mph SE
Humidity34%
Visibility6.2 mi
Dew point58°
Tue, 1191° / 64°0.15
91 °
Manchester, Tuesday, 11 August
Rain. High 91°, low 64°.
Pressure29.83 inHg
Wind7.6 mph N
Humidity48%
Visibility6.2 mi
Dew point63°
Wed, 1293° / 64°0
93 °
Manchester, Wednesday, 12 August
Clear. High 93°, low 64°.
Pressure29.91 inHg
Wind10.4 mph E
Humidity27%
Visibility6.2 mi
Dew point49°
Thu, 1378° / 61°0.2
78 °
Manchester, Thursday, 13 August
Light rain. High 78°, low 61°.
Pressure30.00 inHg
Wind12.4 mph E
Humidity61%
Visibility—
Dew point58°
Fri, 1486° / 58°0
86 °
Manchester, Friday, 14 August
Overcast. High 86°, low 58°.
Pressure30.09 inHg
Wind11.4 mph S
Humidity34%
Visibility—
Dew point48°
Sat, 1581° / 61°0
81 °
Manchester, Saturday, 15 August
Overcast. High 81°, low 61°.
Pressure30.12 inHg
Wind13.1 mph S
Humidity44%
Visibility—
Dew point55°
Sun, 1687° / 61°0
87 °
Manchester, Sunday, 16 August
Overcast. High 87°, low 61°.
Pressure30.06 inHg
Wind7.2 mph SE
Humidity58%
Visibility—
Dew point61°
Mon, 1792° / 63°0.18
92 °
Manchester, Monday, 17 August
Light rain. High 92°, low 63°.
Pressure29.97 inHg
Wind9.4 mph E
Humidity51%
Visibility—
Dew point62°
Tue, 1897° / 65°0
97 °
Manchester, Tuesday, 18 August
Partly cloudy. High 97°, low 65°.
Pressure29.91 inHg
Wind15 mph N
Humidity23%
Visibility—
Dew point46°
Wed, 1981° / 58°0.02
81 °
Manchester, Wednesday, 19 August
Light rain. High 81°, low 58°.
Pressure30.12 inHg
Wind16.4 mph NE
Humidity33%
Visibility—
Dew point43°
Thu, 2075° / 61°0.03
75 °
Manchester, Thursday, 20 August
Light rain. High 75°, low 61°.
Pressure30.12 inHg
Wind11.5 mph S
Humidity56%
Visibility—
Dew point52°
Fri, 2185° / 54°0.23
85 °
Manchester, Friday, 21 August
Rain. High 85°, low 54°.
Pressure29.88 inHg
Wind20.5 mph S
Humidity33%
Visibility—
Dew point46°
Sat, 2289° / 61°0.01
89 °
Manchester, Saturday, 22 August
Light rain. High 89°, low 61°.
Pressure29.77 inHg
Wind19.3 mph W
Humidity37%
Visibility—
Dew point52°
Sun, 2386° / 56°0
86 °
Manchester, Sunday, 23 August
Clear. High 86°, low 56°.
Pressure29.94 inHg
Wind7.4 mph E
Humidity29%
Visibility—
Dew point42°
Mon, 2494° / 61°0.06
94 °
Manchester, Monday, 24 August
Light rain. High 94°, low 61°.
Pressure29.74 inHg
Wind16.8 mph S
Humidity33%
Visibility—
Dew point56°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2581° / 63°0.08
81 °
Manchester, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.08 in
Chance of precipitation30%
Record high95° (1991)
Record low47° (2015)
Wed, 2681° / 63°0.1
81 °
Manchester, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.1 in
Chance of precipitation27%
Record high98° (1976)
Record low47° (1992)
Thu, 2780° / 62°0.06
80 °
Manchester, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.06 in
Chance of precipitation22%
Record high97° (1973)
Record low47° (1992)
Fri, 2880° / 63°0.1
80 °
Manchester, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.1 in
Chance of precipitation32%
Record high95° (1973)
Record low47° (1965)
Sat, 2980° / 62°0.06
80 °
Manchester, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.06 in
Chance of precipitation20%
Record high98° (2012)
Record low46° (1988)
Sun, 3080° / 61°0.08
80 °
Manchester, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low61°
Average precipitation0.08 in
Chance of precipitation23%
Record high94° (1961)
Record low49° (2009)
Mon, 3179° / 62°0.07
79 °
Manchester, Monday, 31 August
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.07 in
Chance of precipitation25%
Record high91° (1961)
Record low46° (1987)
Tue, 0179° / 62°0.08
79 °
Manchester, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.08 in
Chance of precipitation20%
Record high95° (1970)
Record low44° (1965)
Wed, 0279° / 61°0.09
79 °
Manchester, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low61°
Average precipitation0.09 in
Chance of precipitation22%
Record high98° (1983)
Record low46° (1974)
Thu, 0379° / 61°0.06
79 °
Manchester, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low61°
Average precipitation0.06 in
Chance of precipitation20%
Record high95° (2023)
Record low41° (1974)
Fri, 0479° / 60°0.09
79 °
Manchester, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low60°
Average precipitation0.09 in
Chance of precipitation17%
Record high97° (2023)
Record low44° (1962)
Sat, 0578° / 60°0.08
78 °
Manchester, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.08 in
Chance of precipitation22%
Record high95° (1978)
Record low41° (1965)
Sun, 0678° / 59°0.06
78 °
Manchester, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low59°
Average precipitation0.06 in
Chance of precipitation20%
Record high100° (1970)
Record low42° (2025)
Mon, 0776° / 58°0.1
76 °
Manchester, Monday, 7 September
Climate normal for this date — 60-year average.
Average high76°
Average low58°
Average precipitation0.1 in
Chance of precipitation27%
Record high94° (1978)
Record low40° (1986)
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 Manchester, SD 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 Manchester, SD 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.