Monthly outlook for Old Elm Spring Colony, SD: average high 86.8°, average low 64.6°. That is 2° above the climate normal for August. Precipitation is expected on 6 days (about 3.5 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 24 August (99.6°), the coolest 23 August (61.6°).
86.8°/64.6°
Average high / low
+2°
Above normal
6 / 5
Wet days / normal
3.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
85.2°
83°
+1.2°
19 August – 28 August
89.3°
83.1°
+3.5°
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 (10 mi).
Mon, 1085° / 62°0.99
85 °
Old Elm Spring Colony, Monday, 10 August
Heavy rain. High 85°, low 62°.
Pressure29.83 inHg
Wind6.3 mph E
Humidity47%
Visibility6.2 mi
Dew point63°
Tue, 1192° / 67°0.03
92 °
Old Elm Spring Colony, Tuesday, 11 August
Light rain. High 92°, low 67°.
Pressure29.77 inHg
Wind11.8 mph NE
Humidity50%
Visibility6.2 mi
Dew point66°
Wed, 1292° / 66°0.06
92 °
Old Elm Spring Colony, Wednesday, 12 August
Light rain. High 92°, low 66°.
Pressure29.83 inHg
Wind9.9 mph E
Humidity48%
Visibility6.2 mi
Dew point63°
Thu, 1379° / 66°1.17
79 °
Old Elm Spring Colony, Thursday, 13 August
Heavy rain. High 79°, low 66°.
Pressure29.94 inHg
Wind12.6 mph NE
Humidity63%
Visibility—
Dew point62°
Fri, 1474° / 63°0.15
74 °
Old Elm Spring Colony, Friday, 14 August
Light rain. High 74°, low 63°.
Pressure30.03 inHg
Wind16.8 mph E
Humidity59%
Visibility—
Dew point58°
Sat, 1580° / 67°0.41
80 °
Old Elm Spring Colony, Saturday, 15 August
Rain. High 80°, low 67°.
Pressure30.06 inHg
Wind7.9 mph SE
Humidity95%
Visibility—
Dew point67°
Sun, 1684° / 63°0
84 °
Old Elm Spring Colony, Sunday, 16 August
Overcast. High 84°, low 63°.
Pressure30.18 inHg
Wind6.6 mph SE
Humidity57%
Visibility—
Dew point61°
Mon, 1781° / 67°0
81 °
Old Elm Spring Colony, Monday, 17 August
Overcast. High 81°, low 67°.
Pressure30.00 inHg
Wind18.6 mph S
Humidity54%
Visibility—
Dew point61°
Tue, 1896° / 62°0.73
96 °
Old Elm Spring Colony, Tuesday, 18 August
Heavy rain. High 96°, low 62°.
Pressure29.77 inHg
Wind14.4 mph NW
Humidity45%
Visibility—
Dew point62°
Wed, 1980° / 63°0
80 °
Old Elm Spring Colony, Wednesday, 19 August
Partly cloudy. High 80°, low 63°.
Pressure30.00 inHg
Wind11.3 mph N
Humidity51%
Visibility—
Dew point56°
Thu, 2090° / 63°0
90 °
Old Elm Spring Colony, Thursday, 20 August
Partly cloudy. High 90°, low 63°.
Pressure29.88 inHg
Wind10 mph S
Humidity42%
Visibility—
Dew point56°
Fri, 2194° / 67°0
94 °
Old Elm Spring Colony, Friday, 21 August
Mostly clear. High 94°, low 67°.
Pressure29.68 inHg
Wind12.4 mph N
Humidity35%
Visibility—
Dew point56°
Sat, 2285° / 64°0
85 °
Old Elm Spring Colony, Saturday, 22 August
Mostly clear. High 85°, low 64°.
Pressure30.03 inHg
Wind13.4 mph N
Humidity34%
Visibility—
Dew point49°
Sun, 2387° / 62°0
87 °
Old Elm Spring Colony, Sunday, 23 August
Partly cloudy. High 87°, low 62°.
Pressure30.09 inHg
Wind10.3 mph SE
Humidity33%
Visibility—
Dew point49°
Mon, 24100° / 65°0
100 °
Old Elm Spring Colony, Monday, 24 August
Clear. High 100°, low 65°.
Pressure29.94 inHg
Wind15.3 mph S
Humidity31%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2583° / 64°0.1
83 °
Old Elm Spring 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 °
Old Elm Spring 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 °
Old Elm Spring 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 °
Old Elm Spring 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 °
Old Elm Spring 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 °
Old Elm Spring 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 °
Old Elm Spring 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 °
Old Elm Spring 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 °
Old Elm Spring 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 °
Old Elm Spring 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 °
Old Elm Spring 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 °
Old Elm Spring 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 °
Old Elm Spring 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 °
Old Elm Spring 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 Old Elm Spring 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 Old Elm Spring 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.