Monthly outlook for Rousseau, SD: average high 63.4°, average low 44.4°. That is 4.5° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 22 October (76.4°), the coolest 31 October (34°).
63.4°/44.4°
Average high / low
+4.5°
Above normal
1 / 3
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
66.8°
57.5°
+5.2°
29 October – 7 November
57.6°
50.9°
+3.7°
8 November – 17 November
at normal
45°
—
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).
Tue, 2071° / 45°0
71 °
Rousseau, Tuesday, 20 October
Clear. High 71°, low 45°.
Pressure30.09 inHg
Wind11.1 mph SE
Humidity68%
Visibility6.2 mi
Dew point50°
Wed, 2169° / 49°0
69 °
Rousseau, Wednesday, 21 October
Clear. High 69°, low 49°.
Pressure30.21 inHg
Wind6.9 mph NE
Humidity71%
Visibility6.2 mi
Dew point53°
Thu, 2276° / 54°0
76 °
Rousseau, Thursday, 22 October
Mostly clear. High 76°, low 54°.
Pressure30.09 inHg
Wind11.6 mph SE
Humidity75%
Visibility6.2 mi
Dew point57°
Fri, 2374° / 60°0
74 °
Rousseau, Friday, 23 October
Partly cloudy. High 74°, low 60°.
Pressure29.77 inHg
Wind20.3 mph SE
Humidity58%
Visibility—
Dew point53°
Sat, 2467° / 50°0
67 °
Rousseau, Saturday, 24 October
Overcast. High 67°, low 50°.
Pressure29.97 inHg
Wind13.5 mph W
Humidity71%
Visibility—
Dew point52°
Sun, 2555° / 42°0
55 °
Rousseau, Sunday, 25 October
Mostly clear. High 55°, low 42°.
Pressure30.30 inHg
Wind14.8 mph E
Humidity29%
Visibility—
Dew point18°
Mon, 2655° / 40°0
55 °
Rousseau, Monday, 26 October
Overcast. High 55°, low 40°.
Pressure30.15 inHg
Wind13.6 mph NE
Humidity32%
Visibility—
Dew point21°
Tue, 2756° / 35°0
56 °
Rousseau, Tuesday, 27 October
Clear. High 56°, low 35°.
Pressure30.15 inHg
Wind15.8 mph SE
Humidity43%
Visibility—
Dew point27°
Wed, 2872° / 42°0
72 °
Rousseau, Wednesday, 28 October
Overcast. High 72°, low 42°.
Pressure29.77 inHg
Wind20.4 mph S
Humidity47%
Visibility—
Dew point41°
Thu, 2966° / 52°0.21
66 °
Rousseau, Thursday, 29 October
Rain. High 66°, low 52°.
Pressure29.38 inHg
Wind20.8 mph SE
Humidity71%
Visibility—
Dew point52°
Fri, 3049° / 41°0
49 °
Rousseau, Friday, 30 October
Partly cloudy. High 49°, low 41°.
Pressure29.59 inHg
Wind32.5 mph W
Humidity40%
Visibility—
Dew point24°
Sat, 3153° / 34°0
53 °
Rousseau, Saturday, 31 October
Clear. High 53°, low 34°.
Pressure30.03 inHg
Wind15.7 mph W
Humidity30%
Visibility—
Dew point18°
Sun, 0153° / 39°0
53 °
Rousseau, Sunday, 1 November
Overcast. High 53°, low 39°.
Pressure29.88 inHg
Wind20.3 mph NW
Humidity45%
Visibility—
Dew point28°
Mon, 0267° / 42°0
67 °
Rousseau, Monday, 2 November
Mostly clear. High 67°, low 42°.
Pressure29.68 inHg
Wind19.5 mph S
Humidity26%
Visibility—
Dew point24°
Tue, 0357° / 47°0
57 °
Rousseau, Tuesday, 3 November
Overcast. High 57°, low 47°.
Pressure29.47 inHg
Wind18.4 mph S
Humidity46%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0450° / 33°0.01
50 °
Rousseau, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high50°
Average low33°
Average precipitation0.01 in
Chance of precipitation8%
Record high76° (1978)
Record low6° (1991)
Thu, 0551° / 34°0.04
51 °
Rousseau, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low34°
Average precipitation0.04 in
Chance of precipitation15%
Record high74° (2001)
Record low14° (2003)
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)
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.