Monthly outlook for South Byron, WI: average high 45.2°, average low 31.1°. That is 2.4° above the climate normal for November. Precipitation is expected on 6 days (about 2.0 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 21 November (58.9°), the coolest 24 November (18.7°).
45.2°/31.1°
Average high / low
+2.4°
Above normal
6 / 4
Wet days / normal
2.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 November – 23 November
48.7°
42.5°
+3.5°
24 November – 3 December
39.4°
37.1°
+1.3°
4 December – 13 December
at normal
31.9°
—
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).
Sun, 1548° / 28°0
48 °
South Byron, Sunday, 15 November
Clear. High 48°, low 28°.
Pressure30.45 inHg
Wind2.1 mph W
Humidity65%
Visibility6.2 mi
Dew point33°
Mon, 1649° / 33°0
49 °
South Byron, Monday, 16 November
Mostly clear. High 49°, low 33°.
Pressure30.45 inHg
Wind10.8 mph SW
Humidity59%
Visibility6.2 mi
Dew point33°
Tue, 1752° / 35°0
52 °
South Byron, Tuesday, 17 November
Clear. High 52°, low 35°.
Pressure30.42 inHg
Wind11.8 mph SW
Humidity57%
Visibility6.2 mi
Dew point36°
Wed, 1853° / 39°0
53 °
South Byron, Wednesday, 18 November
Overcast. High 53°, low 39°.
Pressure30.21 inHg
Wind14.9 mph S
Humidity62%
Visibility6.2 mi
Dew point38°
Thu, 1955° / 43°0
55 °
South Byron, Thursday, 19 November
Light rain. High 55°, low 43°.
Pressure30.09 inHg
Wind14.7 mph SW
Humidity72%
Visibility—
Dew point45°
Fri, 2049° / 33°0.35
49 °
South Byron, Friday, 20 November
Rain. High 49°, low 33°.
Pressure30.27 inHg
Wind12.7 mph S
Humidity60%
Visibility—
Dew point33°
Sat, 2159° / 48°0.12
59 °
South Byron, Saturday, 21 November
Light rain. High 59°, low 48°.
Pressure29.88 inHg
Wind16.9 mph S
Humidity62%
Visibility—
Dew point45°
Sun, 2250° / 27°0.43
50 °
South Byron, Sunday, 22 November
Snow. High 50°, low 27°.
Pressure29.77 inHg
Wind25.7 mph N
Humidity95%
Visibility—
Dew point34°
Mon, 2329° / 22°0
29 °
South Byron, Monday, 23 November
Overcast. High 29°, low 22°.
Pressure30.47 inHg
Wind19.4 mph N
Humidity68%
Visibility—
Dew point19°
Tue, 2434° / 19°0
34 °
South Byron, Tuesday, 24 November
Mostly clear. High 34°, low 19°.
Pressure30.59 inHg
Wind6.2 mph S
Humidity69%
Visibility—
Dew point22°
Wed, 2534° / 23°0
34 °
South Byron, Wednesday, 25 November
Overcast. High 34°, low 23°.
Pressure30.45 inHg
Wind10.6 mph S
Humidity48%
Visibility—
Dew point15°
Thu, 2638° / 24°0
38 °
South Byron, Thursday, 26 November
Overcast. High 38°, low 24°.
Pressure30.21 inHg
Wind11.1 mph S
Humidity42%
Visibility—
Dew point16°
Fri, 2745° / 32°0.53
45 °
South Byron, Friday, 27 November
Rain. High 45°, low 32°.
Pressure29.74 inHg
Wind21.7 mph E
Humidity72%
Visibility—
Dew point33°
Sat, 2847° / 35°0.51
47 °
South Byron, Saturday, 28 November
Snow. High 47°, low 35°.
Pressure29.12 inHg
Wind20.1 mph W
Humidity95%
Visibility—
Dew point38°
Sun, 2938° / 30°0.04
38 °
South Byron, Sunday, 29 November
Light snow. High 38°, low 30°.
Pressure29.88 inHg
Wind19.8 mph W
Humidity71%
Visibility—
Dew point29°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Sun, 1332° / 19°0.04
32 °
South Byron, Sunday, 13 December
Climate normal for this date — 60-year average.
Average high32°
Average low19°
Average precipitation0.04 in
Chance of precipitation20%
Record high60° (2015)
Record low-14° (1986)
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.