Monthly outlook for Rousseau, SD: average high 59.4°, average low 43.7°. That is 3° above the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 23 October (78.7°), the coolest 5 November (35.5°).
59.4°/43.7°
Average high / low
+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
21 October – 30 October
60.6°
55.9°
+2.7°
31 October – 9 November
57.4°
49.9°
+4.2°
10 November – 19 November
at normal
44.1°
—
October records over 66 years
91°3 October 2025All-time high
1°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Canning (6 mi).
Thu, 2276° / 48°0
76 °
Rousseau, Thursday, 22 October
Mostly clear. High 76°, low 48°.
Pressure30.06 inHg
Wind11.5 mph SE
Humidity69%
Visibility6.2 mi
Dew point54°
Fri, 2379° / 59°0
79 °
Rousseau, Friday, 23 October
Overcast. High 79°, low 59°.
Pressure29.80 inHg
Wind16.7 mph SE
Humidity62%
Visibility6.2 mi
Dew point57°
Sat, 2466° / 49°0.05
66 °
Rousseau, Saturday, 24 October
Light rain. High 66°, low 49°.
Pressure30.24 inHg
Wind15.2 mph NW
Humidity65%
Visibility6.2 mi
Dew point41°
Sun, 2549° / 43°0.54
49 °
Rousseau, Sunday, 25 October
Rain. High 49°, low 43°.
Pressure30.39 inHg
Wind10.1 mph NE
Humidity87%
Visibility2.1 mi
Dew point40°
Mon, 2646° / 40°0.02
46 °
Rousseau, Monday, 26 October
Light rain. High 46°, low 40°.
Pressure30.42 inHg
Wind13.7 mph N
Humidity71%
Visibility—
Dew point35°
Tue, 2757° / 40°0
57 °
Rousseau, Tuesday, 27 October
Overcast. High 57°, low 40°.
Pressure30.15 inHg
Wind11.3 mph S
Humidity72%
Visibility—
Dew point42°
Wed, 2854° / 43°0
54 °
Rousseau, Wednesday, 28 October
Mostly clear. High 54°, low 43°.
Pressure30.12 inHg
Wind18.9 mph NW
Humidity39%
Visibility—
Dew point28°
Thu, 2956° / 40°0
56 °
Rousseau, Thursday, 29 October
Overcast. High 56°, low 40°.
Pressure30.27 inHg
Wind9.3 mph S
Humidity32%
Visibility—
Dew point22°
Fri, 3056° / 45°0
56 °
Rousseau, Friday, 30 October
Overcast. High 56°, low 45°.
Pressure29.88 inHg
Wind23.2 mph SE
Humidity46%
Visibility—
Dew point32°
Sat, 3168° / 51°0.01
68 °
Rousseau, Saturday, 31 October
Light rain. High 68°, low 51°.
Pressure29.38 inHg
Wind17.6 mph SE
Humidity64%
Visibility—
Dew point49°
Sun, 0153° / 43°0
53 °
Rousseau, Sunday, 1 November
Mostly clear. High 53°, low 43°.
Pressure30.06 inHg
Wind22.7 mph NW
Humidity41%
Visibility—
Dew point27°
Mon, 0255° / 37°0
55 °
Rousseau, Monday, 2 November
Clear. High 55°, low 37°.
Pressure30.24 inHg
Wind6.1 mph SE
Humidity36%
Visibility—
Dew point24°
Tue, 0359° / 40°0
59 °
Rousseau, Tuesday, 3 November
Clear. High 59°, low 40°.
Pressure30.18 inHg
Wind6.7 mph NE
Humidity36%
Visibility—
Dew point26°
Wed, 0455° / 37°0
55 °
Rousseau, Wednesday, 4 November
Partly cloudy. High 55°, low 37°.
Pressure29.94 inHg
Wind8.8 mph N
Humidity46%
Visibility—
Dew point29°
Thu, 0554° / 35°0
54 °
Rousseau, Thursday, 5 November
Clear. High 54°, low 35°.
Pressure29.59 inHg
Wind6.3 mph NW
Humidity37%
Visibility—
Dew point23°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0650° / 32°0.02
50 °
Rousseau, Friday, 6 November
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.02 in
Chance of precipitation15%
Record high74° (2020)
Record low4° (2003)
Sat, 0750° / 32°0.04
50 °
Rousseau, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.04 in
Chance of precipitation13%
Record high71° (2006)
Record low1° (1971)
Sun, 0849° / 32°0.07
49 °
Rousseau, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high49°
Average low32°
Average precipitation0.07 in
Chance of precipitation17%
Record high78° (1999)
Record low10° (1991)
Mon, 0946° / 31°0.04
46 °
Rousseau, Monday, 9 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.04 in
Chance of precipitation22%
Record high67° (2016)
Record low10° (1966)
Tue, 1044° / 28°0.05
44 °
Rousseau, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.05 in
Chance of precipitation23%
Record high67° (1989)
Record low2° (1986)
Wed, 1143° / 28°0.02
43 °
Rousseau, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high43°
Average low28°
Average precipitation0.02 in
Chance of precipitation13%
Record high66° (2005)
Record low-1° (1986)
Thu, 1244° / 28°0.05
44 °
Rousseau, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.05 in
Chance of precipitation17%
Record high68° (1999)
Record low0° (1986)
Fri, 1346° / 29°0.03
46 °
Rousseau, Friday, 13 November
Climate normal for this date — 60-year average.
Average high46°
Average low29°
Average precipitation0.03 in
Chance of precipitation17%
Record high70° (1981)
Record low-10° (1986)
Sat, 1445° / 30°0.02
45 °
Rousseau, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high45°
Average low30°
Average precipitation0.02 in
Chance of precipitation10%
Record high67° (2025)
Record low-5° (2014)
Sun, 1544° / 29°0.02
44 °
Rousseau, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high44°
Average low29°
Average precipitation0.02 in
Chance of precipitation20%
Record high63° (1999)
Record low6° (2000)
Mon, 1645° / 28°0.03
45 °
Rousseau, Monday, 16 November
Climate normal for this date — 60-year average.
Average high45°
Average low28°
Average precipitation0.03 in
Chance of precipitation10%
Record high70° (2001)
Record low1° (2014)
Tue, 1744° / 28°0.03
44 °
Rousseau, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.03 in
Chance of precipitation18%
Record high68° (2001)
Record low1° (2000)
Wed, 1843° / 27°0.04
43 °
Rousseau, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high43°
Average low27°
Average precipitation0.04 in
Chance of precipitation23%
Record high61° (2020)
Record low2° (2014)
Thu, 1942° / 28°0.03
42 °
Rousseau, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high42°
Average low28°
Average precipitation0.03 in
Chance of precipitation18%
Record high65° (2003)
Record low8° (1985)
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 Rousseau, 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 Rousseau, 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.