Monthly outlook for Angostura, SD: average high 90.6°, average low 68.2°. That is 3° above the climate normal for August. Precipitation is expected on 6 days (about 1.5 inches), against a normal of 4 days and 0.9 inches. The warmest day looks like 19 August (100.2°), the coolest 13 August (62.1°).
90.6°/68.2°
Average high / low
+3°
Above normal
6 / 4
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
89.6°
85.1°
+2.5°
19 August – 28 August
92.3°
85.1°
+4°
29 August – 7 September
at normal
82.7°
—
August records over 66 years
104.9°7 August 1975All-time high
43.9°22 August 1966All-time low
Climate normals and records are computed from the nearest reference point — Oelrichs (12 mi).
Mon, 10100° / 66°0
100 °
Angostura, Monday, 10 August
Mostly clear. High 100°, low 66°.
Pressure29.71 inHg
Wind2.3 mph SE
Humidity20%
Visibility6.2 mi
Dew point47°
Tue, 1197° / 68°0
97 °
Angostura, Tuesday, 11 August
Light rain. High 97°, low 68°.
Pressure29.80 inHg
Wind12 mph E
Humidity36%
Visibility6.2 mi
Dew point57°
Wed, 1298° / 68°0.04
98 °
Angostura, Wednesday, 12 August
Light rain. High 98°, low 68°.
Pressure29.80 inHg
Wind10.5 mph E
Humidity32%
Visibility6.2 mi
Dew point57°
Thu, 1366° / 62°0.43
66 °
Angostura, Thursday, 13 August
Rain. High 66°, low 62°.
Pressure29.97 inHg
Wind21.3 mph E
Humidity85%
Visibility—
Dew point59°
Fri, 1479° / 62°0.13
79 °
Angostura, Friday, 14 August
Light rain. High 79°, low 62°.
Pressure29.97 inHg
Wind13.4 mph E
Humidity69%
Visibility—
Dew point58°
Sat, 1578° / 64°0.39
78 °
Angostura, Saturday, 15 August
Rain. High 78°, low 64°.
Pressure30.12 inHg
Wind11.9 mph NE
Humidity71%
Visibility—
Dew point59°
Sun, 1689° / 65°0.08
89 °
Angostura, Sunday, 16 August
Light rain. High 89°, low 65°.
Pressure30.09 inHg
Wind16.9 mph SE
Humidity46%
Visibility—
Dew point56°
Mon, 1798° / 71°0
98 °
Angostura, Monday, 17 August
Clear. High 98°, low 71°.
Pressure29.85 inHg
Wind15.9 mph W
Humidity26%
Visibility—
Dew point50°
Tue, 1897° / 76°0
97 °
Angostura, Tuesday, 18 August
Partly cloudy. High 97°, low 76°.
Pressure29.77 inHg
Wind14 mph W
Humidity19%
Visibility—
Dew point44°
Wed, 19100° / 75°0
100 °
Angostura, Wednesday, 19 August
Partly cloudy. High 100°, low 75°.
Pressure29.77 inHg
Wind18.5 mph NE
Humidity20%
Visibility—
Dew point46°
Thu, 2089° / 69°0.03
89 °
Angostura, Thursday, 20 August
Light rain. High 89°, low 69°.
Pressure29.97 inHg
Wind16.4 mph NE
Humidity32%
Visibility—
Dew point47°
Fri, 2197° / 70°0
97 °
Angostura, Friday, 21 August
Clear. High 97°, low 70°.
Pressure29.74 inHg
Wind18 mph S
Humidity24%
Visibility—
Dew point48°
Sat, 2293° / 72°0.01
93 °
Angostura, Saturday, 22 August
Light rain. High 93°, low 72°.
Pressure29.74 inHg
Wind17.9 mph W
Humidity31%
Visibility—
Dew point52°
Sun, 2387° / 67°0.39
87 °
Angostura, Sunday, 23 August
Rain. High 87°, low 67°.
Pressure29.83 inHg
Wind17.7 mph W
Humidity43%
Visibility—
Dew point56°
Mon, 2487° / 67°0.02
87 °
Angostura, Monday, 24 August
Light rain. High 87°, low 67°.
Pressure29.94 inHg
Wind12 mph NE
Humidity55%
Visibility—
Dew point59°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2585° / 62°0.03
85 °
Angostura, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high85°
Average low62°
Average precipitation0.03 in
Chance of precipitation22%
Record high101° (2020)
Record low46° (1964)
Wed, 2685° / 61°0.07
85 °
Angostura, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high85°
Average low61°
Average precipitation0.07 in
Chance of precipitation23%
Record high101° (1970)
Record low50° (1992)
Thu, 2785° / 61°0.06
85 °
Angostura, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high85°
Average low61°
Average precipitation0.06 in
Chance of precipitation23%
Record high103° (2010)
Record low44° (1992)
Fri, 2884° / 61°0.03
84 °
Angostura, Friday, 28 August
Climate normal for this date — 60-year average.
Average high84°
Average low61°
Average precipitation0.03 in
Chance of precipitation13%
Record high98° (2012)
Record low47° (1977)
Sat, 2984° / 60°0.06
84 °
Angostura, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high84°
Average low60°
Average precipitation0.06 in
Chance of precipitation22%
Record high103° (2012)
Record low49° (2018)
Sun, 3085° / 60°0.04
85 °
Angostura, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high85°
Average low60°
Average precipitation0.04 in
Chance of precipitation15%
Record high99° (1990)
Record low45° (1992)
Mon, 3183° / 60°0.04
83 °
Angostura, Monday, 31 August
Climate normal for this date — 60-year average.
Average high83°
Average low60°
Average precipitation0.04 in
Chance of precipitation17%
Record high101° (1960)
Record low46° (1993)
Tue, 0182° / 59°0.04
82 °
Angostura, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high82°
Average low59°
Average precipitation0.04 in
Chance of precipitation18%
Record high98° (2012)
Record low45° (1965)
Wed, 0283° / 60°0.05
83 °
Angostura, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high83°
Average low60°
Average precipitation0.05 in
Chance of precipitation13%
Record high98° (1960)
Record low41° (1974)
Thu, 0383° / 59°0.02
83 °
Angostura, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high83°
Average low59°
Average precipitation0.02 in
Chance of precipitation18%
Record high97° (2017)
Record low40° (1974)
Fri, 0483° / 59°0.05
83 °
Angostura, Friday, 4 September
Climate normal for this date — 60-year average.
Average high83°
Average low59°
Average precipitation0.05 in
Chance of precipitation23%
Record high101° (1960)
Record low42° (1962)
Sat, 0582° / 59°0.04
82 °
Angostura, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high82°
Average low59°
Average precipitation0.04 in
Chance of precipitation17%
Record high100° (2020)
Record low42° (1968)
Sun, 0682° / 58°0.02
82 °
Angostura, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high82°
Average low58°
Average precipitation0.02 in
Chance of precipitation13%
Record high99° (2002)
Record low41° (2025)
Mon, 0780° / 57°0.02
80 °
Angostura, Monday, 7 September
Climate normal for this date — 60-year average.
Average high80°
Average low57°
Average precipitation0.02 in
Chance of precipitation17%
Record high96° (2022)
Record low42° (2020)
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 Angostura, 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 Angostura, 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.