Monthly outlook for Portage, WI: average high 55.7°, average low 38.4°. That is 1° above the climate normal for October. Precipitation is expected on 3 days (about 1.6 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 21 October (67.4°), the coolest 28 October (28.6°).
55.7°/38.4°
Average high / low
+1°
Above normal
3 / 5
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
60.9°
55.1°
+3.2°
29 October – 7 November
47.1°
50.6°
-2°
8 November – 17 November
at normal
44.7°
—
October records over 66 years
86.2°3 October 2025All-time high
20.7°29 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Pardeeville (8 mi).
Tue, 2066° / 42°0
66 °
Portage, Tuesday, 20 October
Clear. High 66°, low 42°.
Pressure30.39 inHg
Wind2.3 mph SE
Humidity68%
Visibility6.2 mi
Dew point48°
Wed, 2167° / 42°0
67 °
Portage, Wednesday, 21 October
Clear. High 67°, low 42°.
Pressure30.27 inHg
Wind4.4 mph SW
Humidity59%
Visibility6.2 mi
Dew point49°
Thu, 2265° / 47°0
65 °
Portage, Thursday, 22 October
Overcast. High 65°, low 47°.
Pressure30.36 inHg
Wind5 mph E
Humidity72%
Visibility6.2 mi
Dew point53°
Fri, 2363° / 47°0
63 °
Portage, Friday, 23 October
Overcast. High 63°, low 47°.
Pressure30.33 inHg
Wind7.8 mph SE
Humidity63%
Visibility—
Dew point46°
Sat, 2464° / 49°0
64 °
Portage, Saturday, 24 October
Overcast. High 64°, low 49°.
Pressure30.33 inHg
Wind9.7 mph S
Humidity60%
Visibility—
Dew point44°
Sun, 2563° / 49°0.02
63 °
Portage, Sunday, 25 October
Light rain. High 63°, low 49°.
Pressure30.24 inHg
Wind12.8 mph W
Humidity34%
Visibility—
Dew point33°
Mon, 2660° / 42°0.04
60 °
Portage, Monday, 26 October
Light rain. High 60°, low 42°.
Pressure30.21 inHg
Wind10.3 mph S
Humidity33%
Visibility—
Dew point28°
Tue, 2757° / 35°1.05
57 °
Portage, Tuesday, 27 October
Rain. High 57°, low 35°.
Pressure30.00 inHg
Wind14.9 mph N
Humidity88%
Visibility—
Dew point42°
Wed, 2839° / 29°0
39 °
Portage, Wednesday, 28 October
Clear. High 39°, low 29°.
Pressure30.27 inHg
Wind14.7 mph NW
Humidity37%
Visibility—
Dew point13°
Thu, 2948° / 29°0
48 °
Portage, Thursday, 29 October
Mostly clear. High 48°, low 29°.
Pressure30.15 inHg
Wind10.5 mph W
Humidity31%
Visibility—
Dew point15°
Fri, 3053° / 33°0
53 °
Portage, Friday, 30 October
Overcast. High 53°, low 33°.
Pressure29.91 inHg
Wind7.2 mph SW
Humidity45%
Visibility—
Dew point28°
Sat, 3148° / 30°0
48 °
Portage, Saturday, 31 October
Overcast. High 48°, low 30°.
Pressure30.12 inHg
Wind9.8 mph E
Humidity60%
Visibility—
Dew point33°
Sun, 0145° / 36°0.49
45 °
Portage, Sunday, 1 November
Snow. High 45°, low 36°.
Pressure29.88 inHg
Wind15.5 mph N
Humidity95%
Visibility—
Dew point43°
Mon, 0243° / 31°0
43 °
Portage, Monday, 2 November
Clear. High 43°, low 31°.
Pressure30.21 inHg
Wind15.3 mph N
Humidity61%
Visibility—
Dew point28°
Tue, 0345° / 30°0
45 °
Portage, Tuesday, 3 November
Overcast. High 45°, low 30°.
Pressure30.06 inHg
Wind4.6 mph NW
Humidity54%
Visibility—
Dew point26°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0449° / 37°0.08
49 °
Portage, 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 °
Portage, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.09 in
Chance of precipitation28%
Record high68° (2020)
Record low18° (1991)
Fri, 0649° / 35°0.08
49 °
Portage, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.08 in
Chance of precipitation32%
Record high69° (2020)
Record low13° (1991)
Sat, 0748° / 35°0.03
48 °
Portage, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.03 in
Chance of precipitation17%
Record high68° (2020)
Record low5° (1991)
Sun, 0848° / 35°0.04
48 °
Portage, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.04 in
Chance of precipitation25%
Record high70° (2020)
Record low3° (2019)
Mon, 0947° / 35°0.1
47 °
Portage, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.1 in
Chance of precipitation35%
Record high72° (2020)
Record low18° (1991)
Tue, 1046° / 34°0.13
46 °
Portage, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.13 in
Chance of precipitation40%
Record high71° (2022)
Record low12° (2017)
Wed, 1144° / 31°0.07
44 °
Portage, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.07 in
Chance of precipitation30%
Record high67° (1964)
Record low12° (2019)
Thu, 1242° / 30°0.06
42 °
Portage, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.06 in
Chance of precipitation27%
Record high62° (1964)
Record low1° (2019)
Fri, 1343° / 30°0.04
43 °
Portage, 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 °
Portage, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.04 in
Chance of precipitation22%
Record high65° (2025)
Record low13° (2018)
Sun, 1544° / 32°0.05
44 °
Portage, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.05 in
Chance of precipitation22%
Record high66° (2001)
Record low18° (1982)
Mon, 1644° / 31°0.05
44 °
Portage, Monday, 16 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.05 in
Chance of precipitation20%
Record high61° (2023)
Record low19° (1989)
Tue, 1744° / 32°0.08
44 °
Portage, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.08 in
Chance of precipitation32%
Record high68° (2016)
Record low12° (2005)
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 Portage, 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 Portage, 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.