Monthly outlook for Hisega, SD: average high 81.7°, average low 59.2°. That is 0.7° above the climate normal for August. Precipitation is expected on 7 days (about 1.7 inches), against a normal of 5 days and 1.1 inches. The warmest day looks like 10 August (95.7°), the coolest 19 August (53.7°).
81.7°/59.2°
Average high / low
+0.7°
Above normal
7 / 5
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
82.4°
80.3°
+1.2°
18 August – 27 August
80.4°
80.4°
+0°
28 August – 6 September
at normal
78.4°
—
August records over 66 years
100.4°29 August 2012All-time high
38.3°22 August 1966All-time low
Climate normals and records are computed from the nearest reference point — Blackhawk (8 mi).
Sun, 0987° / 61°0
87 °
Hisega, Sunday, 9 August
Overcast. High 87°, low 61°.
Pressure29.83 inHg
Wind12.9 mph E
Humidity22%
Visibility6.2 mi
Dew point42°
Mon, 1096° / 60°0
96 °
Hisega, Monday, 10 August
Partly cloudy. High 96°, low 60°.
Pressure29.74 inHg
Wind12.7 mph E
Humidity22%
Visibility6.2 mi
Dew point46°
Tue, 1187° / 63°0.07
87 °
Hisega, Tuesday, 11 August
Light rain. High 87°, low 63°.
Pressure29.85 inHg
Wind11.6 mph E
Humidity42%
Visibility6.2 mi
Dew point56°
Wed, 1288° / 58°0.11
88 °
Hisega, Wednesday, 12 August
Light rain. High 88°, low 58°.
Pressure29.85 inHg
Wind11 mph SE
Humidity41%
Visibility6.2 mi
Dew point55°
Thu, 1363° / 55°0.86
63 °
Hisega, Thursday, 13 August
Heavy rain. High 63°, low 55°.
Pressure30.00 inHg
Wind11.4 mph NE
Humidity88%
Visibility—
Dew point56°
Fri, 1470° / 59°0.18
70 °
Hisega, Friday, 14 August
Rain. High 70°, low 59°.
Pressure29.97 inHg
Wind11.8 mph S
Humidity70%
Visibility—
Dew point57°
Sat, 1577° / 58°0.02
77 °
Hisega, Saturday, 15 August
Light rain. High 77°, low 58°.
Pressure30.12 inHg
Wind9.6 mph NE
Humidity47%
Visibility—
Dew point51°
Sun, 1679° / 60°0.18
79 °
Hisega, Sunday, 16 August
Light rain. High 79°, low 60°.
Pressure30.06 inHg
Wind6.6 mph E
Humidity63%
Visibility—
Dew point56°
Mon, 1785° / 61°0
85 °
Hisega, Monday, 17 August
Overcast. High 85°, low 61°.
Pressure29.91 inHg
Wind7.4 mph SE
Humidity33%
Visibility—
Dew point50°
Tue, 1891° / 65°0
91 °
Hisega, Tuesday, 18 August
Overcast. High 91°, low 65°.
Pressure29.91 inHg
Wind13.3 mph N
Humidity27%
Visibility—
Dew point46°
Wed, 1974° / 54°0.01
74 °
Hisega, Wednesday, 19 August
Light rain. High 74°, low 54°.
Pressure30.09 inHg
Wind13.1 mph SE
Humidity53%
Visibility—
Dew point49°
Thu, 2076° / 59°0.2
76 °
Hisega, Thursday, 20 August
Light rain. High 76°, low 59°.
Pressure29.91 inHg
Wind8.5 mph SE
Humidity54%
Visibility—
Dew point56°
Fri, 2179° / 61°0.04
79 °
Hisega, Friday, 21 August
Light rain. High 79°, low 61°.
Pressure29.68 inHg
Wind14.9 mph NW
Humidity39%
Visibility—
Dew point50°
Sat, 2278° / 58°0
78 °
Hisega, Saturday, 22 August
Clear. High 78°, low 58°.
Pressure29.85 inHg
Wind14.2 mph NE
Humidity30%
Visibility—
Dew point42°
Sun, 2384° / 55°0
84 °
Hisega, Sunday, 23 August
Clear. High 84°, low 55°.
Pressure29.85 inHg
Wind13.6 mph SE
Humidity31%
Visibility—
Dew point43°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2481° / 60°0.04
81 °
Hisega, Monday, 24 August
Climate normal for this date — 60-year average.
Average high81°
Average low60°
Average precipitation0.04 in
Chance of precipitation27%
Record high96° (2024)
Record low44° (1966)
Tue, 2580° / 59°0.03
80 °
Hisega, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low59°
Average precipitation0.03 in
Chance of precipitation22%
Record high94° (2020)
Record low42° (1964)
Wed, 2680° / 58°0.09
80 °
Hisega, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low58°
Average precipitation0.09 in
Chance of precipitation30%
Record high98° (1970)
Record low46° (1992)
Thu, 2780° / 58°0.07
80 °
Hisega, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low58°
Average precipitation0.07 in
Chance of precipitation22%
Record high98° (2010)
Record low45° (1987)
Fri, 2879° / 59°0.04
79 °
Hisega, Friday, 28 August
Climate normal for this date — 60-year average.
Average high79°
Average low59°
Average precipitation0.04 in
Chance of precipitation15%
Record high93° (1969)
Record low44° (1988)
Sat, 2980° / 58°0.06
80 °
Hisega, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low58°
Average precipitation0.06 in
Chance of precipitation22%
Record high100° (2012)
Record low46° (1988)
Sun, 3080° / 58°0.05
80 °
Hisega, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low58°
Average precipitation0.05 in
Chance of precipitation25%
Record high95° (2023)
Record low43° (1992)
Mon, 3178° / 57°0.04
78 °
Hisega, Monday, 31 August
Climate normal for this date — 60-year average.
Average high78°
Average low57°
Average precipitation0.04 in
Chance of precipitation17%
Record high94° (2008)
Record low42° (1962)
Tue, 0178° / 57°0.06
78 °
Hisega, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high78°
Average low57°
Average precipitation0.06 in
Chance of precipitation22%
Record high95° (2012)
Record low43° (1974)
Wed, 0279° / 58°0.07
79 °
Hisega, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low58°
Average precipitation0.07 in
Chance of precipitation18%
Record high96° (1960)
Record low40° (1974)
Thu, 0378° / 56°0.02
78 °
Hisega, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high78°
Average low56°
Average precipitation0.02 in
Chance of precipitation20%
Record high95° (2024)
Record low38° (1974)
Fri, 0478° / 56°0.07
78 °
Hisega, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low56°
Average precipitation0.07 in
Chance of precipitation28%
Record high97° (1960)
Record low40° (1962)
Sat, 0578° / 56°0.06
78 °
Hisega, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low56°
Average precipitation0.06 in
Chance of precipitation18%
Record high99° (2020)
Record low37° (1965)
Sun, 0677° / 55°0.04
77 °
Hisega, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high77°
Average low55°
Average precipitation0.04 in
Chance of precipitation23%
Record high97° (1978)
Record low40° (2025)
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 Hisega, 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 Hisega, 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.