Monthly outlook for Wessington, SD: average high 88°, average low 65.5°. That is 2.8° above the climate normal for August. Precipitation is expected on 9 days (about 1.3 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 19 August (107.5°), the coolest 14 August (57.9°).
88°/65.5°
Average high / low
+2.8°
Above normal
9 / 4
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
87.5°
82.9°
+2.6°
19 August – 28 August
88.8°
82.8°
+3.3°
29 August – 7 September
at normal
80.7°
—
August records over 66 years
106.7°13 August 1965All-time high
45.9°12 August 1964All-time low
Climate normals and records are computed from the nearest reference point — St. Lawrence (13 mi).
Mon, 1091° / 60°0.4
91 °
Wessington, Monday, 10 August
Rain. High 91°, low 60°.
Pressure29.83 inHg
Wind9.7 mph SE
Humidity49%
Visibility6.2 mi
Dew point63°
Tue, 1192° / 64°0.06
92 °
Wessington, Tuesday, 11 August
Light rain. High 92°, low 64°.
Pressure29.85 inHg
Wind11.5 mph NE
Humidity45%
Visibility6.2 mi
Dew point60°
Wed, 1292° / 64°0
92 °
Wessington, Wednesday, 12 August
Partly cloudy. High 92°, low 64°.
Pressure29.91 inHg
Wind10.5 mph SE
Humidity33%
Visibility6.2 mi
Dew point51°
Thu, 1373° / 63°0.07
73 °
Wessington, Thursday, 13 August
Light rain. High 73°, low 63°.
Pressure30.03 inHg
Wind10.8 mph SE
Humidity86%
Visibility—
Dew point61°
Fri, 1476° / 58°0
76 °
Wessington, Friday, 14 August
Overcast. High 76°, low 58°.
Pressure30.09 inHg
Wind15.7 mph SE
Humidity46%
Visibility—
Dew point51°
Sat, 1576° / 63°0.01
76 °
Wessington, Saturday, 15 August
Light rain. High 76°, low 63°.
Pressure30.09 inHg
Wind11.1 mph SE
Humidity80%
Visibility—
Dew point62°
Sun, 1691° / 65°0
91 °
Wessington, Sunday, 16 August
Overcast. High 91°, low 65°.
Pressure30.12 inHg
Wind6.3 mph N
Humidity36%
Visibility—
Dew point54°
Mon, 1794° / 66°0.05
94 °
Wessington, Monday, 17 August
Light rain. High 94°, low 66°.
Pressure29.91 inHg
Wind19.2 mph SE
Humidity45%
Visibility—
Dew point63°
Tue, 18103° / 75°0.02
103 °
Wessington, Tuesday, 18 August
Light rain. High 103°, low 75°.
Pressure29.71 inHg
Wind10.4 mph NE
Humidity36%
Visibility—
Dew point63°
Wed, 19107° / 72°0.02
107 °
Wessington, Wednesday, 19 August
Light rain. High 107°, low 72°.
Pressure29.71 inHg
Wind13.9 mph NE
Humidity26%
Visibility—
Dew point56°
Thu, 2082° / 69°0
82 °
Wessington, Thursday, 20 August
Overcast. High 82°, low 69°.
Pressure30.00 inHg
Wind10.8 mph NE
Humidity44%
Visibility—
Dew point51°
Fri, 2190° / 65°0.23
90 °
Wessington, Friday, 21 August
Rain. High 90°, low 65°.
Pressure29.88 inHg
Wind14.7 mph SE
Humidity43%
Visibility—
Dew point58°
Sat, 2294° / 66°0.15
94 °
Wessington, Saturday, 22 August
Light rain. High 94°, low 66°.
Pressure29.68 inHg
Wind15.3 mph N
Humidity48%
Visibility—
Dew point63°
Sun, 2379° / 67°0.2
79 °
Wessington, Sunday, 23 August
Light rain. High 79°, low 67°.
Pressure29.94 inHg
Wind12 mph NE
Humidity86%
Visibility—
Dew point66°
Mon, 2481° / 66°0.05
81 °
Wessington, Monday, 24 August
Light rain. High 81°, low 66°.
Pressure30.00 inHg
Wind10.5 mph NE
Humidity76%
Visibility—
Dew point65°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2583° / 64°0.04
83 °
Wessington, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low64°
Average precipitation0.04 in
Chance of precipitation20%
Record high99° (1991)
Record low47° (2025)
Wed, 2683° / 63°0.08
83 °
Wessington, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low63°
Average precipitation0.08 in
Chance of precipitation25%
Record high101° (1991)
Record low46° (1992)
Thu, 2782° / 62°0.06
82 °
Wessington, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low62°
Average precipitation0.06 in
Chance of precipitation27%
Record high101° (1973)
Record low46° (1992)
Fri, 2882° / 64°0.07
82 °
Wessington, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.07 in
Chance of precipitation32%
Record high97° (1991)
Record low48° (1986)
Sat, 2983° / 63°0.06
83 °
Wessington, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low63°
Average precipitation0.06 in
Chance of precipitation23%
Record high100° (2012)
Record low48° (1988)
Sun, 3082° / 62°0.08
82 °
Wessington, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low62°
Average precipitation0.08 in
Chance of precipitation22%
Record high98° (1961)
Record low49° (2009)
Mon, 3181° / 63°0.04
81 °
Wessington, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.04 in
Chance of precipitation18%
Record high94° (1979)
Record low47° (1992)
Tue, 0181° / 62°0.07
81 °
Wessington, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low62°
Average precipitation0.07 in
Chance of precipitation25%
Record high97° (1970)
Record low45° (1965)
Wed, 0281° / 62°0.13
81 °
Wessington, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high81°
Average low62°
Average precipitation0.13 in
Chance of precipitation25%
Record high101° (1983)
Record low47° (1974)
Thu, 0381° / 61°0.04
81 °
Wessington, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high81°
Average low61°
Average precipitation0.04 in
Chance of precipitation20%
Record high97° (2005)
Record low42° (1974)
Fri, 0481° / 61°0.06
81 °
Wessington, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low61°
Average precipitation0.06 in
Chance of precipitation17%
Record high97° (2023)
Record low44° (1962)
Sat, 0580° / 61°0.1
80 °
Wessington, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low61°
Average precipitation0.1 in
Chance of precipitation13%
Record high100° (1978)
Record low42° (1965)
Sun, 0680° / 60°0.05
80 °
Wessington, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low60°
Average precipitation0.05 in
Chance of precipitation20%
Record high102° (1976)
Record low43° (2025)
Mon, 0778° / 58°0.11
78 °
Wessington, Monday, 7 September
Climate normal for this date — 60-year average.
Average high78°
Average low58°
Average precipitation0.11 in
Chance of precipitation30%
Record high96° (1980)
Record low42° (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 Wessington, 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 Wessington, 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.