Monthly outlook for Sun Prairie, WI: average high 57°, average low 44.1°. That is 2.9° above the climate normal for October. Precipitation is expected on 6 days (about 2.1 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 23 October (71.5°), the coolest 3 November (32.5°).
57°/44.1°
Average high / low
+2.9°
Above normal
6 / 4
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
23 October – 1 November
59.8°
53.3°
+3.6°
2 November – 11 November
52.4°
47.9°
+2.5°
12 November – 21 November
at normal
43°
—
October records over 66 years
85.1°3 October 2025All-time high
20.8°30 October 1988All-time low
Climate normals and records are computed from the nearest reference point — Windsor (5 mi).
Sat, 2469° / 50°0.02
69 °
Sun Prairie, Saturday, 24 October
Light rain. High 69°, low 50°.
Pressure30.30 inHg
Wind10.7 mph S
Humidity61%
Visibility6.2 mi
Dew point50°
Sun, 2570° / 54°0
70 °
Sun Prairie, Sunday, 25 October
Clear. High 70°, low 54°.
Pressure30.33 inHg
Wind5 mph SW
Humidity61%
Visibility6.2 mi
Dew point52°
Mon, 2655° / 49°0
55 °
Sun Prairie, Monday, 26 October
Light rain. High 55°, low 49°.
Pressure30.42 inHg
Wind8.8 mph NE
Humidity53%
Visibility6.2 mi
Dew point37°
Tue, 2760° / 47°0.04
60 °
Sun Prairie, Tuesday, 27 October
Light rain. High 60°, low 47°.
Pressure30.27 inHg
Wind10.3 mph E
Humidity73%
Visibility—
Dew point47°
Wed, 2867° / 52°0.02
67 °
Sun Prairie, Wednesday, 28 October
Light rain. High 67°, low 52°.
Pressure29.94 inHg
Wind15.9 mph SW
Humidity66%
Visibility—
Dew point51°
Thu, 2963° / 50°0.56
63 °
Sun Prairie, Thursday, 29 October
Rain. High 63°, low 50°.
Pressure30.06 inHg
Wind16.8 mph SW
Humidity75%
Visibility—
Dew point52°
Fri, 3050° / 45°1.03
50 °
Sun Prairie, Friday, 30 October
Rain. High 50°, low 45°.
Pressure30.09 inHg
Wind16.6 mph NE
Humidity94%
Visibility—
Dew point48°
Sat, 3148° / 44°0.24
48 °
Sun Prairie, Saturday, 31 October
Light rain. High 48°, low 44°.
Pressure29.97 inHg
Wind17.1 mph NE
Humidity96%
Visibility—
Dew point46°
Sun, 0145° / 41°0.14
45 °
Sun Prairie, Sunday, 1 November
Light rain. High 45°, low 41°.
Pressure29.97 inHg
Wind9.7 mph N
Humidity94%
Visibility—
Dew point42°
Mon, 0246° / 36°0.07
46 °
Sun Prairie, Monday, 2 November
Snow. High 46°, low 36°.
Pressure30.09 inHg
Wind13 mph NW
Humidity53%
Visibility—
Dew point28°
Tue, 0351° / 32°0
51 °
Sun Prairie, Tuesday, 3 November
Clear. High 51°, low 32°.
Pressure30.21 inHg
Wind11 mph W
Humidity51%
Visibility—
Dew point30°
Wed, 0451° / 35°0
51 °
Sun Prairie, Wednesday, 4 November
Mostly clear. High 51°, low 35°.
Pressure30.21 inHg
Wind10.2 mph NW
Humidity53%
Visibility—
Dew point32°
Thu, 0555° / 37°0
55 °
Sun Prairie, Thursday, 5 November
Clear. High 55°, low 37°.
Pressure30.18 inHg
Wind13.4 mph SW
Humidity48%
Visibility—
Dew point33°
Fri, 0655° / 41°0
55 °
Sun Prairie, Friday, 6 November
Overcast. High 55°, low 41°.
Pressure30.06 inHg
Wind15.6 mph SW
Humidity48%
Visibility—
Dew point34°
Sat, 0756° / 44°0
56 °
Sun Prairie, Saturday, 7 November
Overcast. High 56°, low 44°.
Pressure30.12 inHg
Wind10.1 mph E
Humidity48%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0848° / 34°0.04
48 °
Sun Prairie, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.04 in
Chance of precipitation20%
Record high70° (2020)
Record low2° (2019)
Mon, 0947° / 34°0.11
47 °
Sun Prairie, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.11 in
Chance of precipitation33%
Record high72° (2020)
Record low18° (1991)
Tue, 1046° / 33°0.11
46 °
Sun Prairie, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.11 in
Chance of precipitation38%
Record high70° (2022)
Record low12° (2017)
Wed, 1144° / 30°0.08
44 °
Sun Prairie, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.08 in
Chance of precipitation30%
Record high68° (1964)
Record low11° (2019)
Thu, 1242° / 30°0.06
42 °
Sun Prairie, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.06 in
Chance of precipitation30%
Record high62° (1964)
Record low2° (2019)
Fri, 1343° / 30°0.04
43 °
Sun Prairie, Friday, 13 November
Climate normal for this date — 60-year average.
Average high43°
Average low30°
Average precipitation0.04 in
Chance of precipitation17%
Record high66° (1999)
Record low6° (1986)
Sat, 1444° / 31°0.04
44 °
Sun Prairie, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.04 in
Chance of precipitation22%
Record high65° (1971)
Record low12° (2019)
Sun, 1544° / 32°0.05
44 °
Sun Prairie, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.05 in
Chance of precipitation25%
Record high66° (2025)
Record low17° (1995)
Mon, 1644° / 31°0.05
44 °
Sun Prairie, Monday, 16 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.05 in
Chance of precipitation22%
Record high60° (1975)
Record low19° (1989)
Tue, 1744° / 32°0.08
44 °
Sun Prairie, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.08 in
Chance of precipitation25%
Record high68° (2016)
Record low12° (2005)
Wed, 1844° / 31°0.08
44 °
Sun Prairie, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.08 in
Chance of precipitation28%
Record high63° (2001)
Record low10° (2014)
Thu, 1943° / 30°0.06
43 °
Sun Prairie, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high43°
Average low30°
Average precipitation0.06 in
Chance of precipitation25%
Record high61° (2020)
Record low6° (1986)
Fri, 2042° / 30°0.07
42 °
Sun Prairie, Friday, 20 November
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.07 in
Chance of precipitation32%
Record high60° (1982)
Record low10° (2022)
Sat, 2140° / 28°0.09
40 °
Sun Prairie, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high40°
Average low28°
Average precipitation0.09 in
Chance of precipitation27%
Record high63° (1990)
Record low6° (1964)
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 Sun Prairie, 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 Sun Prairie, 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.