Monthly outlook for Sioux, WI: average high 56.6°, average low 46.8°. That is 2.5° above the climate normal for October. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 7 days and 1.7 inches. The warmest day looks like 11 October (78.2°), the coolest 17 October (33.9°).
56.6°/46.8°
Average high / low
+2.5°
Above normal
3 / 7
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
56.5°
53.2°
+1.8°
21 October – 30 October
56.8°
49.4°
+4.1°
31 October – 9 November
at normal
44.5°
—
October records over 66 years
86.4°1 October 2023All-time high
20.8°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Washburn (4 mi).
Mon, 1261° / 51°0.2
61 °
Sioux, Monday, 12 October
Rain. High 61°, low 51°.
Pressure29.85 inHg
Wind15.1 mph NE
Humidity90%
Visibility4.5 mi
Dew point51°
Tue, 1354° / 51°0.03
54 °
Sioux, Tuesday, 13 October
Light rain. High 54°, low 51°.
Pressure29.91 inHg
Wind3.9 mph NE
Humidity83%
Visibility6.2 mi
Dew point47°
Wed, 1453° / 48°0
53 °
Sioux, Wednesday, 14 October
Overcast. High 53°, low 48°.
Pressure30.21 inHg
Wind6.6 mph NW
Humidity70%
Visibility6.2 mi
Dew point43°
Thu, 1554° / 45°0.02
54 °
Sioux, Thursday, 15 October
Light rain. High 54°, low 45°.
Pressure30.18 inHg
Wind11.8 mph W
Humidity68%
Visibility—
Dew point42°
Fri, 1654° / 45°0.01
54 °
Sioux, Friday, 16 October
Light rain. High 54°, low 45°.
Pressure30.47 inHg
Wind16.8 mph NW
Humidity50%
Visibility—
Dew point33°
Sat, 1743° / 34°0
43 °
Sioux, Saturday, 17 October
Clear. High 43°, low 34°.
Pressure30.50 inHg
Wind9.8 mph NW
Humidity32%
Visibility—
Dew point12°
Sun, 1855° / 34°0
55 °
Sioux, Sunday, 18 October
Overcast. High 55°, low 34°.
Pressure29.91 inHg
Wind21.1 mph SW
Humidity42%
Visibility—
Dew point28°
Mon, 1960° / 46°0
60 °
Sioux, Monday, 19 October
Clear. High 60°, low 46°.
Pressure30.15 inHg
Wind11.5 mph SW
Humidity42%
Visibility—
Dew point34°
Tue, 2055° / 45°0
55 °
Sioux, Tuesday, 20 October
Overcast. High 55°, low 45°.
Pressure30.21 inHg
Wind8 mph E
Humidity57%
Visibility—
Dew point39°
Wed, 2159° / 51°0.19
59 °
Sioux, Wednesday, 21 October
Light rain. High 59°, low 51°.
Pressure30.00 inHg
Wind10.6 mph S
Humidity69%
Visibility—
Dew point47°
Thu, 2262° / 50°0
62 °
Sioux, Thursday, 22 October
Mostly clear. High 62°, low 50°.
Pressure30.15 inHg
Wind9.8 mph S
Humidity63%
Visibility—
Dew point47°
Fri, 2357° / 48°0
57 °
Sioux, Friday, 23 October
Overcast. High 57°, low 48°.
Pressure30.21 inHg
Wind6.4 mph NE
Humidity71%
Visibility—
Dew point47°
Sat, 2458° / 46°0
58 °
Sioux, Saturday, 24 October
Overcast. High 58°, low 46°.
Pressure30.18 inHg
Wind6.8 mph S
Humidity68%
Visibility—
Dew point46°
Sun, 2558° / 48°0.01
58 °
Sioux, Sunday, 25 October
Light rain. High 58°, low 48°.
Pressure29.85 inHg
Wind14.9 mph NW
Humidity48%
Visibility—
Dew point38°
Mon, 2647° / 42°0.04
47 °
Sioux, Monday, 26 October
Light rain. High 47°, low 42°.
Pressure29.77 inHg
Wind19.4 mph NW
Humidity73%
Visibility—
Dew point36°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2749° / 40°0.14
49 °
Sioux, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.14 in
Chance of precipitation42%
Record high63° (1989)
Record low21° (2020)
Wed, 2848° / 39°0.07
48 °
Sioux, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high48°
Average low39°
Average precipitation0.07 in
Chance of precipitation33%
Record high68° (2024)
Record low30° (1988)
Thu, 2947° / 39°0.11
47 °
Sioux, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high47°
Average low39°
Average precipitation0.11 in
Chance of precipitation30%
Record high64° (2022)
Record low26° (2019)
Fri, 3048° / 39°0.09
48 °
Sioux, Friday, 30 October
Climate normal for this date — 60-year average.
Average high48°
Average low39°
Average precipitation0.09 in
Chance of precipitation40%
Record high63° (1971)
Record low22° (2020)
Sat, 3147° / 38°0.09
47 °
Sioux, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.09 in
Chance of precipitation40%
Record high62° (2022)
Record low23° (1996)
Sun, 0146° / 38°0.12
46 °
Sioux, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high46°
Average low38°
Average precipitation0.12 in
Chance of precipitation38%
Record high65° (2022)
Record low23° (2023)
Mon, 0246° / 37°0.1
46 °
Sioux, Monday, 2 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.1 in
Chance of precipitation38%
Record high72° (2022)
Record low19° (1984)
Tue, 0345° / 37°0.06
45 °
Sioux, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high45°
Average low37°
Average precipitation0.06 in
Chance of precipitation33%
Record high69° (2022)
Record low20° (1991)
Wed, 0444° / 36°0.09
44 °
Sioux, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high44°
Average low36°
Average precipitation0.09 in
Chance of precipitation35%
Record high66° (2020)
Record low17° (1991)
Thu, 0544° / 36°0.07
44 °
Sioux, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high44°
Average low36°
Average precipitation0.07 in
Chance of precipitation35%
Record high60° (2016)
Record low15° (1991)
Fri, 0644° / 36°0.07
44 °
Sioux, Friday, 6 November
Climate normal for this date — 60-year average.
Average high44°
Average low36°
Average precipitation0.07 in
Chance of precipitation27%
Record high72° (2020)
Record low13° (1991)
Sat, 0744° / 35°0.05
44 °
Sioux, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high44°
Average low35°
Average precipitation0.05 in
Chance of precipitation33%
Record high68° (2020)
Record low13° (1991)
Sun, 0843° / 35°0.06
43 °
Sioux, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high43°
Average low35°
Average precipitation0.06 in
Chance of precipitation27%
Record high70° (2020)
Record low12° (1991)
Mon, 0943° / 34°0.11
43 °
Sioux, Monday, 9 November
Climate normal for this date — 60-year average.
Average high43°
Average low34°
Average precipitation0.11 in
Chance of precipitation45%
Record high70° (2020)
Record low16° (2017)
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 Sioux, WI 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 Sioux, WI 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.