Monthly outlook for De Smet, SD: average high 56.3°, average low 40.4°. That is 1.3° above the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 3 days and 1.0 inches. The warmest day looks like 20 October (65.2°), the coolest 25 October (33.5°).
56.3°/40.4°
Average high / low
+1.3°
Above normal
2 / 3
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 October – 23 October
57.9°
55.1°
+1.6°
24 October – 2 November
53.6°
50.5°
+1.7°
3 November – 12 November
at normal
44.3°
—
October records over 66 years
86.4°1 October 2023All-time high
7.9°26 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Erwin (9 mi).
Thu, 1557° / 46°0.07
57 °
De Smet, Thursday, 15 October
Light rain. High 57°, low 46°.
Pressure30.15 inHg
Wind10.4 mph NW
Humidity71%
Visibility6.2 mi
Dew point44°
Fri, 1649° / 39°0.01
49 °
De Smet, Friday, 16 October
Light rain. High 49°, low 39°.
Pressure30.65 inHg
Wind15.7 mph NW
Humidity62%
Visibility6.2 mi
Dew point30°
Sat, 1759° / 38°0
59 °
De Smet, Saturday, 17 October
Clear. High 59°, low 38°.
Pressure30.33 inHg
Wind17.5 mph S
Humidity47%
Visibility6.2 mi
Dew point30°
Sun, 1861° / 44°0
61 °
De Smet, Sunday, 18 October
Clear. High 61°, low 44°.
Pressure30.12 inHg
Wind17 mph S
Humidity46%
Visibility—
Dew point36°
Mon, 1960° / 45°0
60 °
De Smet, Monday, 19 October
Overcast. High 60°, low 45°.
Pressure30.03 inHg
Wind13.4 mph S
Humidity60%
Visibility—
Dew point42°
Tue, 2065° / 43°0
65 °
De Smet, Tuesday, 20 October
Clear. High 65°, low 43°.
Pressure30.09 inHg
Wind16.5 mph S
Humidity44%
Visibility—
Dew point37°
Wed, 2159° / 43°0
59 °
De Smet, Wednesday, 21 October
Partly cloudy. High 59°, low 43°.
Pressure30.18 inHg
Wind15.6 mph N
Humidity39%
Visibility—
Dew point31°
Thu, 2256° / 35°0
56 °
De Smet, Thursday, 22 October
Clear. High 56°, low 35°.
Pressure30.33 inHg
Wind12.3 mph SE
Humidity30%
Visibility—
Dew point20°
Fri, 2359° / 40°0
59 °
De Smet, Friday, 23 October
Overcast. High 59°, low 40°.
Pressure30.21 inHg
Wind17.3 mph S
Humidity46%
Visibility—
Dew point33°
Sat, 2449° / 40°0.48
49 °
De Smet, Saturday, 24 October
Rain. High 49°, low 40°.
Pressure30.15 inHg
Wind12.9 mph N
Humidity89%
Visibility—
Dew point45°
Sun, 2548° / 34°0
48 °
De Smet, Sunday, 25 October
Clear. High 48°, low 34°.
Pressure30.27 inHg
Wind11.5 mph NW
Humidity49%
Visibility—
Dew point25°
Mon, 2654° / 34°0
54 °
De Smet, Monday, 26 October
Partly cloudy. High 54°, low 34°.
Pressure29.85 inHg
Wind11.6 mph S
Humidity48%
Visibility—
Dew point30°
Tue, 2754° / 35°0
54 °
De Smet, Tuesday, 27 October
Clear. High 54°, low 35°.
Pressure29.97 inHg
Wind11.5 mph E
Humidity46%
Visibility—
Dew point29°
Wed, 2856° / 40°0
56 °
De Smet, Wednesday, 28 October
Overcast. High 56°, low 40°.
Pressure29.85 inHg
Wind11.1 mph SE
Humidity63%
Visibility—
Dew point40°
Thu, 2960° / 46°0
60 °
De Smet, Thursday, 29 October
Overcast. High 60°, low 46°.
Pressure29.74 inHg
Wind19.2 mph S
Humidity59%
Visibility—
Dew point44°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 3049° / 36°0.1
49 °
De Smet, Friday, 30 October
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.1 in
Chance of precipitation28%
Record high67° (1965)
Record low16° (1991)
Sat, 3149° / 34°0.06
49 °
De Smet, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.06 in
Chance of precipitation17%
Record high70° (1990)
Record low17° (2019)
Sun, 0148° / 34°0.06
48 °
De Smet, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.06 in
Chance of precipitation23%
Record high69° (1990)
Record low17° (2002)
Mon, 0247° / 33°0.04
47 °
De Smet, Monday, 2 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.04 in
Chance of precipitation15%
Record high70° (1978)
Record low8° (1991)
Tue, 0347° / 34°0.03
47 °
De Smet, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.03 in
Chance of precipitation17%
Record high70° (1978)
Record low6° (1991)
Wed, 0447° / 32°0.02
47 °
De Smet, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high47°
Average low32°
Average precipitation0.02 in
Chance of precipitation10%
Record high68° (2015)
Record low-4° (1991)
Thu, 0547° / 33°0.04
47 °
De Smet, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.04 in
Chance of precipitation22%
Record high70° (2001)
Record low11° (2003)
Fri, 0646° / 32°0.03
46 °
De Smet, Friday, 6 November
Climate normal for this date — 60-year average.
Average high46°
Average low32°
Average precipitation0.03 in
Chance of precipitation15%
Record high72° (2020)
Record low8° (2003)
Sat, 0747° / 31°0.02
47 °
De Smet, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.02 in
Chance of precipitation12%
Record high69° (2020)
Record low3° (1991)
Sun, 0846° / 31°0.07
46 °
De Smet, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.07 in
Chance of precipitation22%
Record high70° (2020)
Record low10° (2003)
Mon, 0943° / 30°0.09
43 °
De Smet, Monday, 9 November
Climate normal for this date — 60-year average.
Average high43°
Average low30°
Average precipitation0.09 in
Chance of precipitation27%
Record high64° (1999)
Record low10° (2018)
Tue, 1041° / 27°0.06
41 °
De Smet, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high41°
Average low27°
Average precipitation0.06 in
Chance of precipitation23%
Record high62° (2016)
Record low5° (1986)
Wed, 1140° / 26°0.02
40 °
De Smet, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high40°
Average low26°
Average precipitation0.02 in
Chance of precipitation15%
Record high63° (2005)
Record low2° (1986)
Thu, 1240° / 26°0.06
40 °
De Smet, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high40°
Average low26°
Average precipitation0.06 in
Chance of precipitation22%
Record high62° (1999)
Record low0° (1966)
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 De Smet, 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 De Smet, 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.