Monthly outlook for Sioux, WI: average high 54.6°, average low 43.4°. That is 0.9° above the climate normal for October. Precipitation is expected on 8 days (about 3.6 inches), against a normal of 7 days and 1.8 inches. The warmest day looks like 10 October (80.7°), the coolest 18 October (27.8°).
54.6°/43.4°
Average high / low
+0.9°
Above normal
8 / 7
Wet days / normal
3.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 October – 18 October
57.5°
54.1°
+1.9°
19 October – 28 October
49.6°
50.2°
-0.3°
29 October – 7 November
at normal
45.5°
—
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).
Sat, 1081° / 49°0
81 °
Sioux, Saturday, 10 October
Clear. High 81°, low 49°.
Pressure29.74 inHg
Wind12.2 mph S
Humidity60%
Visibility6.2 mi
Dew point58°
Sun, 1179° / 56°0
79 °
Sioux, Sunday, 11 October
Clear. High 79°, low 56°.
Pressure29.74 inHg
Wind8.7 mph SW
Humidity57%
Visibility6.2 mi
Dew point59°
Mon, 1262° / 50°0.36
62 °
Sioux, Monday, 12 October
Rain. High 62°, low 50°.
Pressure29.85 inHg
Wind13.8 mph NE
Humidity87%
Visibility6.2 mi
Dew point50°
Tue, 1351° / 49°0.17
51 °
Sioux, Tuesday, 13 October
Light rain. High 51°, low 49°.
Pressure30.00 inHg
Wind7.4 mph NE
Humidity81%
Visibility6.2 mi
Dew point45°
Wed, 1453° / 50°0
53 °
Sioux, Wednesday, 14 October
Overcast. High 53°, low 50°.
Pressure30.24 inHg
Wind7.9 mph NW
Humidity62%
Visibility—
Dew point40°
Thu, 1554° / 47°0.99
54 °
Sioux, Thursday, 15 October
Rain. High 54°, low 47°.
Pressure30.36 inHg
Wind9.5 mph SE
Humidity62%
Visibility—
Dew point40°
Fri, 1648° / 37°1.01
48 °
Sioux, Friday, 16 October
Snow. High 48°, low 37°.
Pressure29.50 inHg
Wind23.4 mph N
Humidity90%
Visibility—
Dew point45°
Sat, 1736° / 29°0.1
36 °
Sioux, Saturday, 17 October
Snow. High 36°, low 29°.
Pressure30.45 inHg
Wind22.1 mph N
Humidity58%
Visibility—
Dew point21°
Sun, 1848° / 28°0
48 °
Sioux, Sunday, 18 October
Overcast. High 48°, low 28°.
Pressure30.06 inHg
Wind19.6 mph S
Humidity54%
Visibility—
Dew point27°
Mon, 1946° / 38°0
46 °
Sioux, Monday, 19 October
Light rain. High 46°, low 38°.
Pressure30.39 inHg
Wind10.8 mph E
Humidity80%
Visibility—
Dew point39°
Tue, 2050° / 41°0.09
50 °
Sioux, Tuesday, 20 October
Light rain. High 50°, low 41°.
Pressure30.12 inHg
Wind12.1 mph S
Humidity84%
Visibility—
Dew point43°
Wed, 2150° / 48°0.62
50 °
Sioux, Wednesday, 21 October
Rain. High 50°, low 48°.
Pressure29.91 inHg
Wind11 mph SW
Humidity92%
Visibility—
Dew point46°
Thu, 2253° / 46°0.01
53 °
Sioux, Thursday, 22 October
Light rain. High 53°, low 46°.
Pressure29.91 inHg
Wind8.8 mph NW
Humidity80%
Visibility—
Dew point46°
Fri, 2352° / 44°0
52 °
Sioux, Friday, 23 October
Overcast. High 52°, low 44°.
Pressure29.97 inHg
Wind6.4 mph NE
Humidity68%
Visibility—
Dew point41°
Sat, 2446° / 43°0.29
46 °
Sioux, Saturday, 24 October
Light rain. High 46°, low 43°.
Pressure29.83 inHg
Wind13.8 mph NW
Humidity91%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 2550° / 41°0.08
50 °
Sioux, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.08 in
Chance of precipitation40%
Record high66° (1989)
Record low28° (2020)
Mon, 2649° / 41°0.09
49 °
Sioux, Monday, 26 October
Climate normal for this date — 60-year average.
Average high49°
Average low41°
Average precipitation0.09 in
Chance of precipitation30%
Record high66° (1989)
Record low24° (2020)
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)
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.