Monthly outlook for Oacoma, SD: average high 88.6°, average low 63.9°. That is 2.4° above the climate normal for August. Precipitation is expected on 7 days (about 1.8 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 10 August (103.4°), the coolest 21 August (58°).
88.6°/63.9°
Average high / low
+2.4°
Above normal
7 / 4
Wet days / normal
1.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
90.5°
84.4°
+3.4°
18 August – 27 August
85.5°
84.4°
+0.6°
28 August – 6 September
at normal
82.6°
—
August records over 66 years
107.2°29 August 2012All-time high
46°23 August 1966All-time low
Climate normals and records are computed from the nearest reference point — Reliance (13 mi).
Sun, 0995° / 66°0
95 °
Oacoma, Sunday, 9 August
Mostly clear. High 95°, low 66°.
Pressure29.77 inHg
Wind15.4 mph NE
Humidity40%
Visibility6.2 mi
Dew point62°
Mon, 10103° / 66°0.09
103 °
Oacoma, Monday, 10 August
Light rain. High 103°, low 66°.
Pressure29.80 inHg
Wind7.9 mph E
Humidity35%
Visibility6.2 mi
Dew point59°
Tue, 1195° / 66°0.04
95 °
Oacoma, Tuesday, 11 August
Light rain. High 95°, low 66°.
Pressure29.83 inHg
Wind12.2 mph NE
Humidity45%
Visibility6.2 mi
Dew point63°
Wed, 1293° / 68°0.21
93 °
Oacoma, Wednesday, 12 August
Rain. High 93°, low 68°.
Pressure29.88 inHg
Wind6 mph E
Humidity43%
Visibility6.2 mi
Dew point60°
Thu, 1377° / 64°0.8
77 °
Oacoma, Thursday, 13 August
Heavy rain. High 77°, low 64°.
Pressure30.00 inHg
Wind17.4 mph E
Humidity71%
Visibility—
Dew point61°
Fri, 1481° / 61°0
81 °
Oacoma, Friday, 14 August
Overcast. High 81°, low 61°.
Pressure30.06 inHg
Wind17.4 mph S
Humidity46%
Visibility—
Dew point54°
Sat, 1582° / 65°0
82 °
Oacoma, Saturday, 15 August
Light rain. High 82°, low 65°.
Pressure30.12 inHg
Wind9.1 mph SE
Humidity68%
Visibility—
Dew point63°
Sun, 1690° / 66°0.01
90 °
Oacoma, Sunday, 16 August
Light rain. High 90°, low 66°.
Pressure30.03 inHg
Wind8.3 mph SE
Humidity55%
Visibility—
Dew point63°
Mon, 1796° / 67°0.12
96 °
Oacoma, Monday, 17 August
Light rain. High 96°, low 67°.
Pressure29.94 inHg
Wind11.9 mph SW
Humidity52%
Visibility—
Dew point65°
Tue, 1898° / 69°0.01
98 °
Oacoma, Tuesday, 18 August
Light rain. High 98°, low 69°.
Pressure29.91 inHg
Wind7.6 mph SW
Humidity27%
Visibility—
Dew point51°
Wed, 1982° / 63°0.03
82 °
Oacoma, Wednesday, 19 August
Light rain. High 82°, low 63°.
Pressure30.12 inHg
Wind19.4 mph NE
Humidity36%
Visibility—
Dew point47°
Thu, 2070° / 58°0.21
70 °
Oacoma, Thursday, 20 August
Rain. High 70°, low 58°.
Pressure30.09 inHg
Wind14.7 mph SE
Humidity83%
Visibility—
Dew point59°
Fri, 2186° / 58°0.28
86 °
Oacoma, Friday, 21 August
Rain. High 86°, low 58°.
Pressure29.83 inHg
Wind22.1 mph S
Humidity40%
Visibility—
Dew point53°
Sat, 2289° / 64°0
89 °
Oacoma, Saturday, 22 August
Clear. High 89°, low 64°.
Pressure29.80 inHg
Wind15.8 mph NW
Humidity34%
Visibility—
Dew point52°
Sun, 2388° / 62°0.01
88 °
Oacoma, Sunday, 23 August
Light rain. High 88°, low 62°.
Pressure29.94 inHg
Wind9.4 mph SE
Humidity26%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2485° / 65°0.05
85 °
Oacoma, Monday, 24 August
Climate normal for this date — 60-year average.
Average high85°
Average low65°
Average precipitation0.05 in
Chance of precipitation15%
Record high99° (1991)
Record low50° (1966)
Tue, 2585° / 65°0.04
85 °
Oacoma, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high85°
Average low65°
Average precipitation0.04 in
Chance of precipitation15%
Record high103° (1991)
Record low49° (1964)
Wed, 2684° / 64°0.04
84 °
Oacoma, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low64°
Average precipitation0.04 in
Chance of precipitation20%
Record high103° (1970)
Record low51° (1992)
Thu, 2784° / 64°0.04
84 °
Oacoma, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high84°
Average low64°
Average precipitation0.04 in
Chance of precipitation22%
Record high100° (1962)
Record low46° (1992)
Fri, 2884° / 65°0.07
84 °
Oacoma, Friday, 28 August
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.07 in
Chance of precipitation18%
Record high99° (2012)
Record low49° (1986)
Sat, 2984° / 64°0.04
84 °
Oacoma, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high84°
Average low64°
Average precipitation0.04 in
Chance of precipitation13%
Record high107° (2012)
Record low50° (2018)
Sun, 3084° / 64°0.09
84 °
Oacoma, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high84°
Average low64°
Average precipitation0.09 in
Chance of precipitation20%
Record high96° (1961)
Record low50° (1992)
Mon, 3182° / 64°0.03
82 °
Oacoma, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.03 in
Chance of precipitation17%
Record high96° (1975)
Record low50° (1993)
Tue, 0182° / 63°0.07
82 °
Oacoma, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high82°
Average low63°
Average precipitation0.07 in
Chance of precipitation22%
Record high100° (1983)
Record low44° (1965)
Wed, 0283° / 63°0.11
83 °
Oacoma, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high83°
Average low63°
Average precipitation0.11 in
Chance of precipitation18%
Record high102° (1983)
Record low47° (1974)
Thu, 0382° / 62°0.05
82 °
Oacoma, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low62°
Average precipitation0.05 in
Chance of precipitation23%
Record high99° (2023)
Record low42° (1974)
Fri, 0482° / 62°0.07
82 °
Oacoma, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low62°
Average precipitation0.07 in
Chance of precipitation17%
Record high99° (2001)
Record low45° (1962)
Sat, 0581° / 62°0.06
81 °
Oacoma, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low62°
Average precipitation0.06 in
Chance of precipitation18%
Record high100° (1978)
Record low45° (1965)
Sun, 0682° / 61°0.04
82 °
Oacoma, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high82°
Average low61°
Average precipitation0.04 in
Chance of precipitation17%
Record high103° (1976)
Record low43° (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 Oacoma, 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 Oacoma, 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.