Monthly outlook for De Smet, SD: average high 60.4°, average low 44.9°. That is 3.1° above the climate normal for October. Precipitation is expected on 2 days (about 1.4 inches), against a normal of 3 days and 1.0 inches. The warmest day looks like 22 October (77.8°), the coolest 25 October (33.2°).
60.4°/44.9°
Average high / low
+3.1°
Above normal
2 / 3
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
61.7°
55.9°
+3.3°
22 October – 31 October
58.1°
51.8°
+3.5°
1 November – 10 November
at normal
45.8°
—
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).
Tue, 1352° / 43°0.02
52 °
De Smet, Tuesday, 13 October
Light rain. High 52°, low 43°.
Pressure30.00 inHg
Wind8.9 mph NW
Humidity67%
Visibility6.2 mi
Dew point40°
Wed, 1455° / 40°0.01
55 °
De Smet, Wednesday, 14 October
Light rain. High 55°, low 40°.
Pressure30.27 inHg
Wind3.6 mph NE
Humidity65%
Visibility6.2 mi
Dew point40°
Thu, 1561° / 46°0.04
61 °
De Smet, Thursday, 15 October
Light rain. High 61°, low 46°.
Pressure30.24 inHg
Wind6.9 mph NW
Humidity65%
Visibility6.2 mi
Dew point44°
Fri, 1650° / 40°0
50 °
De Smet, Friday, 16 October
Clear. High 50°, low 40°.
Pressure30.68 inHg
Wind9.9 mph NW
Humidity60%
Visibility6.2 mi
Dew point32°
Sat, 1763° / 41°0
63 °
De Smet, Saturday, 17 October
Clear. High 63°, low 41°.
Pressure30.12 inHg
Wind16.9 mph S
Humidity38%
Visibility—
Dew point29°
Sun, 1867° / 49°0
67 °
De Smet, Sunday, 18 October
Overcast. High 67°, low 49°.
Pressure29.88 inHg
Wind15.2 mph S
Humidity40%
Visibility—
Dew point36°
Mon, 1967° / 47°0
67 °
De Smet, Monday, 19 October
Mostly clear. High 67°, low 47°.
Pressure29.97 inHg
Wind9.5 mph SE
Humidity44%
Visibility—
Dew point40°
Tue, 2070° / 51°0
70 °
De Smet, Tuesday, 20 October
Overcast. High 70°, low 51°.
Pressure29.91 inHg
Wind17.6 mph S
Humidity67%
Visibility—
Dew point52°
Wed, 2167° / 57°0.18
67 °
De Smet, Wednesday, 21 October
Rain. High 67°, low 57°.
Pressure29.77 inHg
Wind22.4 mph S
Humidity84%
Visibility—
Dew point59°
Thu, 2278° / 53°1.01
78 °
De Smet, Thursday, 22 October
Heavy rain. High 78°, low 53°.
Pressure29.71 inHg
Wind22.9 mph S
Humidity67%
Visibility—
Dew point58°
Fri, 2358° / 44°0.04
58 °
De Smet, Friday, 23 October
Light rain. High 58°, low 44°.
Pressure29.71 inHg
Wind20.5 mph W
Humidity66%
Visibility—
Dew point40°
Sat, 2444° / 37°0.03
44 °
De Smet, Saturday, 24 October
Light rain. High 44°, low 37°.
Pressure30.00 inHg
Wind19.5 mph NW
Humidity74%
Visibility—
Dew point35°
Sun, 2552° / 33°0
52 °
De Smet, Sunday, 25 October
Overcast. High 52°, low 33°.
Pressure30.09 inHg
Wind5.8 mph SE
Humidity54%
Visibility—
Dew point30°
Mon, 2659° / 42°0
59 °
De Smet, Monday, 26 October
Overcast. High 59°, low 42°.
Pressure30.03 inHg
Wind12 mph S
Humidity57%
Visibility—
Dew point38°
Tue, 2759° / 46°0.03
59 °
De Smet, Tuesday, 27 October
Light rain. High 59°, low 46°.
Pressure29.85 inHg
Wind12.4 mph NW
Humidity62%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2851° / 36°0.03
51 °
De Smet, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.03 in
Chance of precipitation15%
Record high71° (2024)
Record low20° (2023)
Thu, 2951° / 36°0.06
51 °
De Smet, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.06 in
Chance of precipitation23%
Record high68° (2004)
Record low18° (1991)
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)
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.