Monthly outlook for Grantsburg, WI: average high 56°, average low 39.6°. That is 3.8° above the climate normal for October. Precipitation is expected on 4 days (about 0.4 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 24 October (71.8°), the coolest 30 October (29.1°).
56°/39.6°
Average high / low
+3.8°
Above normal
4 / 4
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
58.5°
50.9°
+4.2°
31 October – 9 November
51.7°
45.1°
+3.6°
10 November – 19 November
at normal
38.9°
—
October records over 66 years
84.7°4 October 2025All-time high
16.2°23 October 2002All-time low
Climate normals and records are computed from the nearest reference point — Rock Creek (11 mi).
Thu, 2271° / 39°0
71 °
Grantsburg, Thursday, 22 October
Clear. High 71°, low 39°.
Pressure30.27 inHg
Wind3.1 mph E
Humidity62%
Visibility6.2 mi
Dew point50°
Fri, 2371° / 55°0.01
71 °
Grantsburg, Friday, 23 October
Light rain. High 71°, low 55°.
Pressure30.18 inHg
Wind10.9 mph S
Humidity62%
Visibility6.2 mi
Dew point54°
Sat, 2472° / 60°0.03
72 °
Grantsburg, Saturday, 24 October
Light rain. High 72°, low 60°.
Pressure30.06 inHg
Wind13.5 mph S
Humidity53%
Visibility6.2 mi
Dew point51°
Sun, 2558° / 49°0.05
58 °
Grantsburg, Sunday, 25 October
Light rain. High 58°, low 49°.
Pressure30.42 inHg
Wind9.1 mph N
Humidity40%
Visibility—
Dew point31°
Mon, 2650° / 37°0.22
50 °
Grantsburg, Monday, 26 October
Light rain. High 50°, low 37°.
Pressure30.42 inHg
Wind9.4 mph N
Humidity51%
Visibility—
Dew point32°
Tue, 2745° / 29°0
45 °
Grantsburg, Tuesday, 27 October
Clear. High 45°, low 29°.
Pressure30.50 inHg
Wind6.4 mph N
Humidity41%
Visibility—
Dew point19°
Wed, 2850° / 30°0
50 °
Grantsburg, Wednesday, 28 October
Clear. High 50°, low 30°.
Pressure30.18 inHg
Wind15.1 mph SW
Humidity35%
Visibility—
Dew point19°
Thu, 2948° / 30°0
48 °
Grantsburg, Thursday, 29 October
Clear. High 48°, low 30°.
Pressure30.15 inHg
Wind12.1 mph NW
Humidity37%
Visibility—
Dew point21°
Fri, 3051° / 29°0
51 °
Grantsburg, Friday, 30 October
Clear. High 51°, low 29°.
Pressure30.12 inHg
Wind15.6 mph S
Humidity37%
Visibility—
Dew point20°
Sat, 3155° / 44°0.04
55 °
Grantsburg, Saturday, 31 October
Light rain. High 55°, low 44°.
Pressure29.68 inHg
Wind18.2 mph S
Humidity66%
Visibility—
Dew point40°
Sun, 0162° / 42°0
62 °
Grantsburg, Sunday, 1 November
Overcast. High 62°, low 42°.
Pressure29.74 inHg
Wind12.9 mph SW
Humidity60%
Visibility—
Dew point44°
Mon, 0250° / 38°0
50 °
Grantsburg, Monday, 2 November
Clear. High 50°, low 38°.
Pressure30.18 inHg
Wind13.6 mph NW
Humidity40%
Visibility—
Dew point24°
Tue, 0343° / 32°0.05
43 °
Grantsburg, Tuesday, 3 November
Light rain. High 43°, low 32°.
Pressure30.33 inHg
Wind6.4 mph E
Humidity49%
Visibility—
Dew point23°
Wed, 0450° / 38°0
50 °
Grantsburg, Wednesday, 4 November
Overcast. High 50°, low 38°.
Pressure30.21 inHg
Wind9 mph E
Humidity55%
Visibility—
Dew point32°
Thu, 0551° / 37°0
51 °
Grantsburg, Thursday, 5 November
Overcast. High 51°, low 37°.
Pressure30.33 inHg
Wind10.6 mph S
Humidity54%
Visibility—
Dew point33°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0645° / 32°0.07
45 °
Grantsburg, Friday, 6 November
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.07 in
Chance of precipitation20%
Record high70° (2020)
Record low4° (1991)
Sat, 0744° / 32°0.03
44 °
Grantsburg, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.03 in
Chance of precipitation20%
Record high67° (2020)
Record low-10° (1991)
Sun, 0844° / 31°0.04
44 °
Grantsburg, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.04 in
Chance of precipitation23%
Record high69° (2020)
Record low1° (1991)
Mon, 0943° / 31°0.1
43 °
Grantsburg, Monday, 9 November
Climate normal for this date — 60-year average.
Average high43°
Average low31°
Average precipitation0.1 in
Chance of precipitation33%
Record high66° (1999)
Record low9° (2003)
Tue, 1040° / 30°0.11
40 °
Grantsburg, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high40°
Average low30°
Average precipitation0.11 in
Chance of precipitation32%
Record high62° (2016)
Record low9° (2017)
Wed, 1139° / 28°0.06
39 °
Grantsburg, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high39°
Average low28°
Average precipitation0.06 in
Chance of precipitation25%
Record high58° (2012)
Record low8° (1986)
Thu, 1238° / 26°0.07
38 °
Grantsburg, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high38°
Average low26°
Average precipitation0.07 in
Chance of precipitation27%
Record high57° (2001)
Record low-7° (1966)
Fri, 1339° / 27°0.07
39 °
Grantsburg, Friday, 13 November
Climate normal for this date — 60-year average.
Average high39°
Average low27°
Average precipitation0.07 in
Chance of precipitation25%
Record high65° (1999)
Record low-2° (1982)
Sat, 1440° / 28°0.03
40 °
Grantsburg, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high40°
Average low28°
Average precipitation0.03 in
Chance of precipitation20%
Record high63° (2025)
Record low4° (2014)
Sun, 1540° / 28°0.04
40 °
Grantsburg, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high40°
Average low28°
Average precipitation0.04 in
Chance of precipitation20%
Record high61° (2001)
Record low-3° (2014)
Mon, 1639° / 27°0.09
39 °
Grantsburg, Monday, 16 November
Climate normal for this date — 60-year average.
Average high39°
Average low27°
Average precipitation0.09 in
Chance of precipitation23%
Record high63° (2023)
Record low6° (1997)
Tue, 1738° / 27°0.07
38 °
Grantsburg, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high38°
Average low27°
Average precipitation0.07 in
Chance of precipitation25%
Record high65° (2001)
Record low7° (2014)
Wed, 1838° / 26°0.08
38 °
Grantsburg, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high38°
Average low26°
Average precipitation0.08 in
Chance of precipitation20%
Record high60° (2001)
Record low2° (2014)
Thu, 1938° / 26°0.07
38 °
Grantsburg, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high38°
Average low26°
Average precipitation0.07 in
Chance of precipitation30%
Record high55° (2012)
Record low8° (2022)
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 Grantsburg, 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 Grantsburg, 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.