Monthly outlook for Terraville, SD: average high 81.8°, average low 58.6°. That is 0.1° above the climate normal for August. Precipitation is expected on 7 days (about 2.6 inches), against a normal of 5 days and 1.0 inches. The warmest day looks like 10 August (92.8°), the coolest 19 August (52.3°).
81.8°/58.6°
Average high / low
+0.1°
Above normal
7 / 5
Wet days / normal
2.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
82.5°
81.5°
+0.6°
18 August – 27 August
80.5°
81.5°
-0.5°
28 August – 6 September
at normal
79.4°
—
August records over 66 years
101.1°6 August 1961All-time high
38.3°23 August 1966All-time low
Climate normals and records are computed from the nearest reference point — Whitewood (9 mi).
Sun, 0984° / 60°0
84 °
Terraville, Sunday, 9 August
Overcast. High 84°, low 60°.
Pressure29.80 inHg
Wind12.2 mph E
Humidity18%
Visibility6.2 mi
Dew point38°
Mon, 1093° / 61°0
93 °
Terraville, Monday, 10 August
Overcast. High 93°, low 61°.
Pressure29.74 inHg
Wind10.1 mph NE
Humidity19%
Visibility6.2 mi
Dew point43°
Tue, 1186° / 63°0.03
86 °
Terraville, Tuesday, 11 August
Light rain. High 86°, low 63°.
Pressure29.83 inHg
Wind13.3 mph E
Humidity35%
Visibility6.2 mi
Dew point53°
Wed, 1287° / 58°0.07
87 °
Terraville, Wednesday, 12 August
Light rain. High 87°, low 58°.
Pressure29.80 inHg
Wind6.6 mph E
Humidity24%
Visibility6.2 mi
Dew point46°
Thu, 1369° / 56°0.86
69 °
Terraville, Thursday, 13 August
Heavy rain. High 69°, low 56°.
Pressure29.97 inHg
Wind15.9 mph SE
Humidity71%
Visibility—
Dew point55°
Fri, 1479° / 60°1.04
79 °
Terraville, Friday, 14 August
Heavy rain. High 79°, low 60°.
Pressure29.88 inHg
Wind9.9 mph S
Humidity46%
Visibility—
Dew point54°
Sat, 1576° / 56°0.05
76 °
Terraville, Saturday, 15 August
Light rain. High 76°, low 56°.
Pressure30.12 inHg
Wind9.1 mph NE
Humidity51%
Visibility—
Dew point52°
Sun, 1675° / 59°0.24
75 °
Terraville, Sunday, 16 August
Light rain. High 75°, low 59°.
Pressure30.06 inHg
Wind8.2 mph SE
Humidity59%
Visibility—
Dew point57°
Mon, 1785° / 60°0
85 °
Terraville, Monday, 17 August
Partly cloudy. High 85°, low 60°.
Pressure29.94 inHg
Wind9.2 mph N
Humidity31%
Visibility—
Dew point48°
Tue, 1887° / 62°0
87 °
Terraville, Tuesday, 18 August
Overcast. High 87°, low 62°.
Pressure29.91 inHg
Wind12.1 mph NE
Humidity25%
Visibility—
Dew point44°
Wed, 1980° / 52°0.01
80 °
Terraville, Wednesday, 19 August
Light rain. High 80°, low 52°.
Pressure30.03 inHg
Wind10.5 mph SE
Humidity48%
Visibility—
Dew point49°
Thu, 2078° / 57°0.17
78 °
Terraville, Thursday, 20 August
Light rain. High 78°, low 57°.
Pressure29.88 inHg
Wind11.2 mph E
Humidity44%
Visibility—
Dew point52°
Fri, 2173° / 60°0.11
73 °
Terraville, Friday, 21 August
Light rain. High 73°, low 60°.
Pressure29.77 inHg
Wind17.2 mph NW
Humidity68%
Visibility—
Dew point57°
Sat, 2277° / 58°0
77 °
Terraville, Saturday, 22 August
Clear. High 77°, low 58°.
Pressure29.88 inHg
Wind14 mph NW
Humidity34%
Visibility—
Dew point43°
Sun, 2389° / 55°0
89 °
Terraville, Sunday, 23 August
Mostly clear. High 89°, low 55°.
Pressure29.80 inHg
Wind8.5 mph S
Humidity23%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 60°0.04
82 °
Terraville, Monday, 24 August
Climate normal for this date — 60-year average.
Average high82°
Average low60°
Average precipitation0.04 in
Chance of precipitation20%
Record high96° (2000)
Record low45° (1966)
Tue, 2581° / 59°0.03
81 °
Terraville, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high81°
Average low59°
Average precipitation0.03 in
Chance of precipitation25%
Record high94° (1991)
Record low41° (1964)
Wed, 2681° / 58°0.07
81 °
Terraville, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low58°
Average precipitation0.07 in
Chance of precipitation33%
Record high97° (1970)
Record low47° (1992)
Thu, 2781° / 59°0.06
81 °
Terraville, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high81°
Average low59°
Average precipitation0.06 in
Chance of precipitation18%
Record high97° (2010)
Record low46° (1987)
Fri, 2880° / 59°0.02
80 °
Terraville, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low59°
Average precipitation0.02 in
Chance of precipitation13%
Record high94° (2012)
Record low46° (1987)
Sat, 2980° / 58°0.04
80 °
Terraville, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low58°
Average precipitation0.04 in
Chance of precipitation20%
Record high100° (2012)
Record low47° (1988)
Sun, 3082° / 59°0.04
82 °
Terraville, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low59°
Average precipitation0.04 in
Chance of precipitation28%
Record high97° (1990)
Record low44° (1992)
Mon, 3179° / 58°0.05
79 °
Terraville, Monday, 31 August
Climate normal for this date — 60-year average.
Average high79°
Average low58°
Average precipitation0.05 in
Chance of precipitation22%
Record high95° (1975)
Record low42° (1993)
Tue, 0179° / 57°0.05
79 °
Terraville, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low57°
Average precipitation0.05 in
Chance of precipitation22%
Record high96° (2012)
Record low44° (1974)
Wed, 0280° / 58°0.05
80 °
Terraville, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low58°
Average precipitation0.05 in
Chance of precipitation23%
Record high99° (2024)
Record low40° (1974)
Thu, 0379° / 57°0.03
79 °
Terraville, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low57°
Average precipitation0.03 in
Chance of precipitation20%
Record high94° (2007)
Record low38° (1974)
Fri, 0479° / 57°0.08
79 °
Terraville, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low57°
Average precipitation0.08 in
Chance of precipitation20%
Record high100° (1960)
Record low39° (1962)
Sat, 0579° / 57°0.08
79 °
Terraville, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low57°
Average precipitation0.08 in
Chance of precipitation22%
Record high97° (1978)
Record low38° (1965)
Sun, 0678° / 55°0.05
78 °
Terraville, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low55°
Average precipitation0.05 in
Chance of precipitation27%
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 Terraville, 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 Terraville, 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.