Monthly outlook for South Byron, WI: average high 45.6°, average low 31.8°. That is 2.4° above the climate normal for November. Precipitation is expected on 3 days (about 0.9 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 22 November (61.1°), the coolest 25 November (17.8°).
45.6°/31.8°
Average high / low
+2.4°
Above normal
3 / 4
Wet days / normal
0.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 November – 22 November
50.5°
42.7°
+4.4°
23 November – 2 December
37.4°
37.8°
-0.2°
3 December – 12 December
at normal
32.2°
—
November records over 66 years
72.1°9 November 2020All-time high
-0.4°29 November 1995All-time low
Climate normals and records are computed from the nearest reference point — Theresa (9 mi).
Sat, 1447° / 34°0
47 °
South Byron, Saturday, 14 November
Overcast. High 47°, low 34°.
Pressure30.30 inHg
Wind8.4 mph NW
Humidity70%
Visibility6.2 mi
Dew point30°
Sun, 1545° / 27°0
45 °
South Byron, Sunday, 15 November
Clear. High 45°, low 27°.
Pressure30.45 inHg
Wind1.8 mph W
Humidity63%
Visibility6.2 mi
Dew point32°
Mon, 1648° / 30°0
48 °
South Byron, Monday, 16 November
Clear. High 48°, low 30°.
Pressure30.47 inHg
Wind10 mph SW
Humidity58%
Visibility6.2 mi
Dew point33°
Tue, 1751° / 34°0
51 °
South Byron, Tuesday, 17 November
Overcast. High 51°, low 34°.
Pressure30.42 inHg
Wind10.2 mph S
Humidity59%
Visibility—
Dew point33°
Wed, 1852° / 35°0
52 °
South Byron, Wednesday, 18 November
Overcast. High 52°, low 35°.
Pressure30.27 inHg
Wind14.6 mph S
Humidity61%
Visibility—
Dew point35°
Thu, 1958° / 43°0
58 °
South Byron, Thursday, 19 November
Partly cloudy. High 58°, low 43°.
Pressure30.09 inHg
Wind21 mph W
Humidity55%
Visibility—
Dew point41°
Fri, 2048° / 37°0
48 °
South Byron, Friday, 20 November
Overcast. High 48°, low 37°.
Pressure30.42 inHg
Wind8.1 mph NW
Humidity54%
Visibility—
Dew point30°
Sat, 2152° / 42°0.29
52 °
South Byron, Saturday, 21 November
Light rain. High 52°, low 42°.
Pressure30.03 inHg
Wind13.7 mph S
Humidity95%
Visibility—
Dew point49°
Sun, 2261° / 52°0.02
61 °
South Byron, Sunday, 22 November
Light rain. High 61°, low 52°.
Pressure29.83 inHg
Wind19.8 mph S
Humidity66%
Visibility—
Dew point49°
Mon, 2357° / 34°0.53
57 °
South Byron, Monday, 23 November
Snow. High 57°, low 34°.
Pressure29.77 inHg
Wind19.7 mph SW
Humidity86%
Visibility—
Dew point43°
Tue, 2431° / 22°0.05
31 °
South Byron, Tuesday, 24 November
Light snow. High 31°, low 22°.
Pressure30.18 inHg
Wind16.7 mph NW
Humidity55%
Visibility—
Dew point15°
Wed, 2527° / 18°0
27 °
South Byron, Wednesday, 25 November
Clear. High 27°, low 18°.
Pressure30.59 inHg
Wind11.9 mph NW
Humidity34%
Visibility—
Dew point1°
Thu, 2631° / 19°0
31 °
South Byron, Thursday, 26 November
Mostly clear. High 31°, low 19°.
Pressure30.53 inHg
Wind7 mph S
Humidity31%
Visibility—
Dew point2°
Fri, 2737° / 23°0
37 °
South Byron, Friday, 27 November
Overcast. High 37°, low 23°.
Pressure30.21 inHg
Wind16.4 mph SW
Humidity34%
Visibility—
Dew point10°
Sat, 2842° / 30°0
42 °
South Byron, Saturday, 28 November
Overcast. High 42°, low 30°.
Pressure30.09 inHg
Wind14.4 mph SW
Humidity59%
Visibility—
Dew point27°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 2937° / 25°0.06
37 °
South Byron, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high37°
Average low25°
Average precipitation0.06 in
Chance of precipitation32%
Record high62° (1998)
Record low0° (1995)
Mon, 3037° / 25°0.05
37 °
South Byron, Monday, 30 November
Climate normal for this date — 60-year average.
Average high37°
Average low25°
Average precipitation0.05 in
Chance of precipitation27%
Record high64° (1998)
Record low4° (1976)
Tue, 0135° / 24°0.09
35 °
South Byron, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high35°
Average low24°
Average precipitation0.09 in
Chance of precipitation32%
Record high57° (1970)
Record low2° (2025)
Wed, 0236° / 23°0.05
36 °
South Byron, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high36°
Average low23°
Average precipitation0.05 in
Chance of precipitation23%
Record high64° (1982)
Record low-1° (1976)
Thu, 0335° / 23°0.09
35 °
South Byron, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high35°
Average low23°
Average precipitation0.09 in
Chance of precipitation32%
Record high63° (1982)
Record low-7° (1985)
Fri, 0434° / 22°0.04
34 °
South Byron, Friday, 4 December
Climate normal for this date — 60-year average.
Average high34°
Average low22°
Average precipitation0.04 in
Chance of precipitation27%
Record high58° (2017)
Record low-4° (2025)
Sat, 0535° / 22°0.06
35 °
South Byron, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high35°
Average low22°
Average precipitation0.06 in
Chance of precipitation32%
Record high64° (2001)
Record low-3° (2005)
Sun, 0632° / 20°0.04
32 °
South Byron, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high32°
Average low20°
Average precipitation0.04 in
Chance of precipitation28%
Record high54° (1998)
Record low-7° (2007)
Mon, 0730° / 19°0.07
30 °
South Byron, Monday, 7 December
Climate normal for this date — 60-year average.
Average high30°
Average low19°
Average precipitation0.07 in
Chance of precipitation27%
Record high48° (1963)
Record low-9° (1972)
Tue, 0832° / 20°0.05
32 °
South Byron, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high32°
Average low20°
Average precipitation0.05 in
Chance of precipitation25%
Record high53° (2023)
Record low-6° (2005)
Wed, 0932° / 20°0.08
32 °
South Byron, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high32°
Average low20°
Average precipitation0.08 in
Chance of precipitation45%
Record high47° (1993)
Record low-11° (1995)
Thu, 1031° / 19°0.08
31 °
South Byron, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high31°
Average low19°
Average precipitation0.08 in
Chance of precipitation25%
Record high55° (2015)
Record low-9° (1978)
Fri, 1130° / 17°0.08
30 °
South Byron, Friday, 11 December
Climate normal for this date — 60-year average.
Average high30°
Average low17°
Average precipitation0.08 in
Chance of precipitation23%
Record high50° (1979)
Record low-14° (1972)
Sat, 1231° / 17°0.06
31 °
South Byron, Saturday, 12 December
Climate normal for this date — 60-year average.
Average high31°
Average low17°
Average precipitation0.06 in
Chance of precipitation17%
Record high53° (1991)
Record low-9° (1995)
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 South Byron, 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 South Byron, 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.