Monthly outlook for Sylvan Mounds, WI: average high 59.7°, average low 42.7°. That is 1.9° above the climate normal for October. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 5 days and 1.3 inches. The warmest day looks like 21 October (70.9°), the coolest 28 October (32.1°).
59.7°/42.7°
Average high / low
+1.9°
Above normal
4 / 5
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 October – 23 October
62.3°
57.6°
+2.6°
24 October – 2 November
55.3°
53.8°
+0.9°
3 November – 12 November
at normal
48.2°
—
October records over 66 years
84.9°3 October 2025All-time high
21.4°30 October 1988All-time low
Climate normals and records are computed from the nearest reference point — Fort Atkinson (8 mi).
Thu, 1563° / 55°0.51
63 °
Sylvan Mounds, Thursday, 15 October
Rain. High 63°, low 55°.
Pressure30.00 inHg
Wind9.3 mph E
Humidity94%
Visibility3.0 mi
Dew point56°
Fri, 1655° / 42°0.17
55 °
Sylvan Mounds, Friday, 16 October
Rain. High 55°, low 42°.
Pressure30.09 inHg
Wind13 mph NW
Humidity85%
Visibility6.2 mi
Dew point46°
Sat, 1755° / 36°0
55 °
Sylvan Mounds, Saturday, 17 October
Clear. High 55°, low 36°.
Pressure30.53 inHg
Wind7.2 mph SW
Humidity50%
Visibility6.2 mi
Dew point33°
Sun, 1860° / 43°0
60 °
Sylvan Mounds, Sunday, 18 October
Clear. High 60°, low 43°.
Pressure30.36 inHg
Wind16 mph SW
Humidity48%
Visibility—
Dew point36°
Mon, 1962° / 42°0
62 °
Sylvan Mounds, Monday, 19 October
Overcast. High 62°, low 42°.
Pressure30.36 inHg
Wind9.6 mph SW
Humidity55%
Visibility—
Dew point42°
Tue, 2067° / 48°0
67 °
Sylvan Mounds, Tuesday, 20 October
Mostly clear. High 67°, low 48°.
Pressure30.27 inHg
Wind7.5 mph SW
Humidity46%
Visibility—
Dew point42°
Wed, 2171° / 49°0
71 °
Sylvan Mounds, Wednesday, 21 October
Clear. High 71°, low 49°.
Pressure30.12 inHg
Wind11.8 mph S
Humidity45%
Visibility—
Dew point45°
Thu, 2264° / 44°0.35
64 °
Sylvan Mounds, Thursday, 22 October
Rain. High 64°, low 44°.
Pressure30.06 inHg
Wind15.9 mph NE
Humidity78%
Visibility—
Dew point55°
Fri, 2358° / 41°0.11
58 °
Sylvan Mounds, Friday, 23 October
Light rain. High 58°, low 41°.
Pressure30.18 inHg
Wind15.3 mph S
Humidity66%
Visibility—
Dew point45°
Sat, 2464° / 49°0.02
64 °
Sylvan Mounds, Saturday, 24 October
Light rain. High 64°, low 49°.
Pressure29.80 inHg
Wind23 mph W
Humidity79%
Visibility—
Dew point53°
Sun, 2553° / 41°0
53 °
Sylvan Mounds, Sunday, 25 October
Clear. High 53°, low 41°.
Pressure30.30 inHg
Wind19.3 mph NW
Humidity39%
Visibility—
Dew point26°
Mon, 2657° / 38°0
57 °
Sylvan Mounds, Monday, 26 October
Partly cloudy. High 57°, low 38°.
Pressure30.06 inHg
Wind17 mph SW
Humidity50%
Visibility—
Dew point36°
Tue, 2750° / 32°0
50 °
Sylvan Mounds, Tuesday, 27 October
Clear. High 50°, low 32°.
Pressure30.03 inHg
Wind5.9 mph NE
Humidity34%
Visibility—
Dew point20°
Wed, 2853° / 32°0
53 °
Sylvan Mounds, Wednesday, 28 October
Clear. High 53°, low 32°.
Pressure30.00 inHg
Wind6.1 mph E
Humidity38%
Visibility—
Dew point24°
Thu, 2955° / 35°0
55 °
Sylvan Mounds, Thursday, 29 October
Clear. High 55°, low 35°.
Pressure30.00 inHg
Wind7.4 mph E
Humidity49%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 3055° / 41°0.09
55 °
Sylvan Mounds, Friday, 30 October
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.09 in
Chance of precipitation30%
Record high76° (2024)
Record low21° (1988)
Sat, 3153° / 41°0.09
53 °
Sylvan Mounds, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.09 in
Chance of precipitation37%
Record high69° (1974)
Record low25° (2019)
Sun, 0152° / 40°0.19
52 °
Sylvan Mounds, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high52°
Average low40°
Average precipitation0.19 in
Chance of precipitation38%
Record high71° (2016)
Record low20° (2019)
Mon, 0251° / 39°0.12
51 °
Sylvan Mounds, Monday, 2 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.12 in
Chance of precipitation35%
Record high72° (1961)
Record low21° (1991)
Tue, 0351° / 38°0.05
51 °
Sylvan Mounds, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.05 in
Chance of precipitation18%
Record high70° (1964)
Record low16° (1991)
Wed, 0450° / 38°0.08
50 °
Sylvan Mounds, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.08 in
Chance of precipitation23%
Record high69° (2008)
Record low13° (1991)
Thu, 0550° / 37°0.1
50 °
Sylvan Mounds, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.1 in
Chance of precipitation28%
Record high69° (2015)
Record low18° (1991)
Fri, 0649° / 36°0.08
49 °
Sylvan Mounds, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.08 in
Chance of precipitation30%
Record high68° (1975)
Record low18° (1991)
Sat, 0749° / 36°0.03
49 °
Sylvan Mounds, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.03 in
Chance of precipitation18%
Record high67° (2020)
Record low9° (1991)
Sun, 0849° / 36°0.04
49 °
Sylvan Mounds, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.04 in
Chance of precipitation20%
Record high70° (2020)
Record low12° (1991)
Mon, 0949° / 36°0.1
49 °
Sylvan Mounds, Monday, 9 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.1 in
Chance of precipitation33%
Record high73° (2020)
Record low18° (1991)
Tue, 1047° / 35°0.09
47 °
Sylvan Mounds, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.09 in
Chance of precipitation33%
Record high71° (2022)
Record low14° (2017)
Wed, 1145° / 32°0.07
45 °
Sylvan Mounds, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.07 in
Chance of precipitation27%
Record high68° (1964)
Record low13° (2019)
Thu, 1243° / 31°0.06
43 °
Sylvan Mounds, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high43°
Average low31°
Average precipitation0.06 in
Chance of precipitation27%
Record high62° (1964)
Record low4° (2019)
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 Sylvan Mounds, 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 Sylvan Mounds, 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.