Monthly outlook for Markesan, WI: average high 67°, average low 49.8°. That is 4.8° above the climate normal for October. Precipitation is expected on 4 days (about 0.5 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 15 October (80.8°), the coolest 14 October (41.7°).
67°/49.8°
Average high / low
+4.8°
Above normal
4 / 5
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
69°
59.6°
+5.2°
18 October – 27 October
63.6°
55.3°
+4.6°
28 October – 6 November
at normal
51°
—
October records over 66 years
84.2°3 October 2025All-time high
20.7°30 October 1988All-time low
Climate normals and records are computed from the nearest reference point — Fox Lake (11 mi).
Fri, 0971° / 50°0
71 °
Markesan, Friday, 9 October
Partly cloudy. High 71°, low 50°.
Pressure30.15 inHg
Wind5.5 mph SE
Humidity49%
Visibility6.2 mi
Dew point47°
Sat, 1079° / 57°0
79 °
Markesan, Saturday, 10 October
Clear. High 79°, low 57°.
Pressure30.00 inHg
Wind11.8 mph S
Humidity56%
Visibility6.2 mi
Dew point59°
Sun, 1175° / 58°0
75 °
Markesan, Sunday, 11 October
Clear. High 75°, low 58°.
Pressure29.97 inHg
Wind10.1 mph S
Humidity52%
Visibility6.2 mi
Dew point54°
Mon, 1279° / 58°0
79 °
Markesan, Monday, 12 October
Overcast. High 79°, low 58°.
Pressure29.77 inHg
Wind9.4 mph S
Humidity55%
Visibility—
Dew point56°
Tue, 1369° / 49°0
69 °
Markesan, Tuesday, 13 October
Overcast. High 69°, low 49°.
Pressure29.97 inHg
Wind12.5 mph N
Humidity60%
Visibility—
Dew point46°
Wed, 1454° / 42°0.01
54 °
Markesan, Wednesday, 14 October
Light rain. High 54°, low 42°.
Pressure30.09 inHg
Wind16.5 mph SE
Humidity62%
Visibility—
Dew point40°
Thu, 1581° / 56°0.12
81 °
Markesan, Thursday, 15 October
Light rain. High 81°, low 56°.
Pressure29.68 inHg
Wind21.7 mph SW
Humidity65%
Visibility—
Dew point63°
Fri, 1664° / 48°0
64 °
Markesan, Friday, 16 October
Clear. High 64°, low 48°.
Pressure30.00 inHg
Wind21.3 mph W
Humidity51%
Visibility—
Dew point43°
Sat, 1751° / 42°0
51 °
Markesan, Saturday, 17 October
Overcast. High 51°, low 42°.
Pressure30.50 inHg
Wind10.8 mph N
Humidity57%
Visibility—
Dew point36°
Sun, 1859° / 43°0
59 °
Markesan, Sunday, 18 October
Mostly clear. High 59°, low 43°.
Pressure30.24 inHg
Wind7.4 mph W
Humidity58%
Visibility—
Dew point41°
Mon, 1955° / 48°0.3
55 °
Markesan, Monday, 19 October
Rain. High 55°, low 48°.
Pressure30.18 inHg
Wind6.2 mph S
Humidity90%
Visibility—
Dew point49°
Tue, 2061° / 52°0.06
61 °
Markesan, Tuesday, 20 October
Light rain. High 61°, low 52°.
Pressure30.09 inHg
Wind5.3 mph W
Humidity76%
Visibility—
Dew point52°
Wed, 2165° / 47°0
65 °
Markesan, Wednesday, 21 October
Partly cloudy. High 65°, low 47°.
Pressure29.94 inHg
Wind8 mph S
Humidity58%
Visibility—
Dew point47°
Thu, 2266° / 50°0.04
66 °
Markesan, Thursday, 22 October
Light rain. High 66°, low 50°.
Pressure29.62 inHg
Wind19.3 mph S
Humidity58%
Visibility—
Dew point49°
Fri, 2376° / 50°0
76 °
Markesan, Friday, 23 October
Clear. High 76°, low 50°.
Pressure29.71 inHg
Wind15.7 mph S
Humidity63%
Visibility—
Dew point57°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2455° / 42°0.1
55 °
Markesan, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.1 in
Chance of precipitation30%
Record high75° (1963)
Record low23° (1981)
Sun, 2554° / 40°0.06
54 °
Markesan, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high54°
Average low40°
Average precipitation0.06 in
Chance of precipitation25%
Record high74° (1989)
Record low25° (2006)
Mon, 2653° / 40°0.09
53 °
Markesan, Monday, 26 October
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.09 in
Chance of precipitation23%
Record high73° (1989)
Record low23° (1962)
Tue, 2754° / 39°0.06
54 °
Markesan, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.06 in
Chance of precipitation23%
Record high73° (2014)
Record low24° (1976)
Wed, 2853° / 39°0.06
53 °
Markesan, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.06 in
Chance of precipitation25%
Record high68° (1974)
Record low25° (1969)
Thu, 2953° / 38°0.05
53 °
Markesan, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.05 in
Chance of precipitation17%
Record high78° (2024)
Record low24° (1988)
Fri, 3054° / 40°0.09
54 °
Markesan, Friday, 30 October
Climate normal for this date — 60-year average.
Average high54°
Average low40°
Average precipitation0.09 in
Chance of precipitation30%
Record high75° (2024)
Record low21° (1988)
Sat, 3153° / 40°0.1
53 °
Markesan, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.1 in
Chance of precipitation32%
Record high68° (1971)
Record low25° (2019)
Sun, 0151° / 38°0.2
51 °
Markesan, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.2 in
Chance of precipitation37%
Record high70° (2000)
Record low19° (2019)
Mon, 0250° / 37°0.12
50 °
Markesan, Monday, 2 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.12 in
Chance of precipitation37%
Record high71° (1961)
Record low18° (1991)
Tue, 0350° / 36°0.05
50 °
Markesan, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.05 in
Chance of precipitation25%
Record high71° (2008)
Record low15° (1991)
Wed, 0449° / 37°0.08
49 °
Markesan, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.08 in
Chance of precipitation27%
Record high71° (2008)
Record low12° (1991)
Thu, 0549° / 36°0.09
49 °
Markesan, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.09 in
Chance of precipitation30%
Record high69° (2015)
Record low18° (1991)
Fri, 0649° / 35°0.09
49 °
Markesan, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.09 in
Chance of precipitation30%
Record high69° (1975)
Record low14° (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 Markesan, 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 Markesan, 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.