Monthly outlook for Rosedale Colony, SD: average high 87.7°, average low 66.3°. That is 2.6° above the climate normal for August. Precipitation is expected on 8 days (about 2.0 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 18 August (99.9°), the coolest 14 August (60.1°).
87.7°/66.3°
Average high / low
+2.6°
Above normal
8 / 5
Wet days / normal
2.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
86.2°
83°
+1.8°
19 August – 28 August
90.3°
83.1°
+4°
29 August – 7 September
at normal
81.1°
—
August records over 66 years
106.3°13 August 1965All-time high
46.2°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Ethan (8 mi).
Mon, 1089° / 63°0.43
89 °
Rosedale Colony, Monday, 10 August
Heavy rain. High 89°, low 63°.
Pressure29.83 inHg
Wind11.2 mph S
Humidity42%
Visibility6.2 mi
Dew point61°
Tue, 1198° / 65°0.03
98 °
Rosedale Colony, Tuesday, 11 August
Light rain. High 98°, low 65°.
Pressure29.80 inHg
Wind9.8 mph NE
Humidity39%
Visibility6.2 mi
Dew point60°
Wed, 1293° / 63°0.11
93 °
Rosedale Colony, Wednesday, 12 August
Rain. High 93°, low 63°.
Pressure29.88 inHg
Wind10.3 mph SE
Humidity37%
Visibility6.2 mi
Dew point56°
Thu, 1375° / 62°0.6
75 °
Rosedale Colony, Thursday, 13 August
Rain. High 75°, low 62°.
Pressure30.06 inHg
Wind12.1 mph E
Humidity95%
Visibility—
Dew point61°
Fri, 1468° / 60°0.01
68 °
Rosedale Colony, Friday, 14 August
Light rain. High 68°, low 60°.
Pressure30.15 inHg
Wind11.5 mph SE
Humidity77%
Visibility—
Dew point57°
Sat, 1576° / 63°0.01
76 °
Rosedale Colony, Saturday, 15 August
Light rain. High 76°, low 63°.
Pressure30.12 inHg
Wind10.2 mph SE
Humidity79%
Visibility—
Dew point62°
Sun, 1688° / 66°0
88 °
Rosedale Colony, Sunday, 16 August
Overcast. High 88°, low 66°.
Pressure30.12 inHg
Wind8.1 mph SW
Humidity44%
Visibility—
Dew point59°
Mon, 1787° / 65°0.01
87 °
Rosedale Colony, Monday, 17 August
Light rain. High 87°, low 65°.
Pressure29.94 inHg
Wind18.1 mph SE
Humidity53%
Visibility—
Dew point65°
Tue, 18100° / 71°0
100 °
Rosedale Colony, Tuesday, 18 August
Mostly clear. High 100°, low 71°.
Pressure29.74 inHg
Wind15.4 mph S
Humidity44%
Visibility—
Dew point66°
Wed, 1996° / 74°0
96 °
Rosedale Colony, Wednesday, 19 August
Overcast. High 96°, low 74°.
Pressure29.74 inHg
Wind11.9 mph SE
Humidity32%
Visibility—
Dew point59°
Thu, 2088° / 71°0.07
88 °
Rosedale Colony, Thursday, 20 August
Light rain. High 88°, low 71°.
Pressure29.91 inHg
Wind15.6 mph NE
Humidity34%
Visibility—
Dew point51°
Fri, 2182° / 66°0.11
82 °
Rosedale Colony, Friday, 21 August
Light rain. High 82°, low 66°.
Pressure29.91 inHg
Wind10.2 mph S
Humidity57%
Visibility—
Dew point60°
Sat, 2297° / 68°0.11
97 °
Rosedale Colony, Saturday, 22 August
Light rain. High 97°, low 68°.
Pressure29.68 inHg
Wind14.4 mph N
Humidity49%
Visibility—
Dew point65°
Sun, 2393° / 69°0.16
93 °
Rosedale Colony, Sunday, 23 August
Light rain. High 93°, low 69°.
Pressure29.85 inHg
Wind12.3 mph E
Humidity54%
Visibility—
Dew point65°
Mon, 2484° / 67°0.37
84 °
Rosedale Colony, Monday, 24 August
Rain. High 84°, low 67°.
Pressure29.97 inHg
Wind9.8 mph E
Humidity65%
Visibility—
Dew point66°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2583° / 64°0.1
83 °
Rosedale Colony, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low64°
Average precipitation0.1 in
Chance of precipitation23%
Record high100° (1991)
Record low49° (2015)
Wed, 2683° / 65°0.09
83 °
Rosedale Colony, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.09 in
Chance of precipitation35%
Record high99° (1973)
Record low51° (1992)
Thu, 2783° / 64°0.08
83 °
Rosedale Colony, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low64°
Average precipitation0.08 in
Chance of precipitation27%
Record high97° (1973)
Record low46° (1992)
Fri, 2883° / 64°0.07
83 °
Rosedale Colony, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low64°
Average precipitation0.07 in
Chance of precipitation23%
Record high102° (2012)
Record low46° (1986)
Sat, 2983° / 64°0.05
83 °
Rosedale Colony, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low64°
Average precipitation0.05 in
Chance of precipitation18%
Record high104° (2012)
Record low50° (1988)
Sun, 3082° / 63°0.06
82 °
Rosedale Colony, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low63°
Average precipitation0.06 in
Chance of precipitation20%
Record high100° (2012)
Record low50° (2009)
Mon, 3181° / 63°0.08
81 °
Rosedale Colony, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.08 in
Chance of precipitation22%
Record high94° (2013)
Record low48° (1992)
Tue, 0181° / 63°0.08
81 °
Rosedale Colony, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.08 in
Chance of precipitation15%
Record high97° (1970)
Record low45° (1965)
Wed, 0282° / 63°0.09
82 °
Rosedale Colony, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low63°
Average precipitation0.09 in
Chance of precipitation30%
Record high102° (2023)
Record low46° (1972)
Thu, 0381° / 63°0.06
81 °
Rosedale Colony, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.06 in
Chance of precipitation23%
Record high98° (2023)
Record low40° (1974)
Fri, 0481° / 62°0.09
81 °
Rosedale Colony, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low62°
Average precipitation0.09 in
Chance of precipitation22%
Record high101° (2023)
Record low45° (1962)
Sat, 0580° / 62°0.07
80 °
Rosedale Colony, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.07 in
Chance of precipitation25%
Record high97° (1990)
Record low43° (1962)
Sun, 0681° / 61°0.04
81 °
Rosedale Colony, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high81°
Average low61°
Average precipitation0.04 in
Chance of precipitation18%
Record high101° (1970)
Record low44° (2025)
Mon, 0779° / 60°0.11
79 °
Rosedale Colony, Monday, 7 September
Climate normal for this date — 60-year average.
Average high79°
Average low60°
Average precipitation0.11 in
Chance of precipitation27%
Record high95° (1978)
Record low42° (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 Rosedale Colony, 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 Rosedale Colony, 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.