As of 02:59 CDT

Weather in Grantsburg, WI

48°Current weather

Grantsburg, Wednesday, 21 October, 02:59

Partly cloudy. Feels like 45°. High 70°, low 44°.

Pressure30.15 inHg
Wind7.3 mph S
Humidity79%
Visibility6.2 mi
Dew point42°

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

PeriodForecast highNormalDifference
21 October – 30 October58.5°50.9°+4.2°
31 October – 9 November51.7°45.1°+3.6°
10 November – 19 Novemberat normal38.9°—

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°0Clear
71 °Clear

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°0.01Light rain
71 °Light rain

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°0.03Light rain
72 °Light rain

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°0.05Light rain
58 °Light rain

Grantsburg, Sunday, 25 October

Light rain. High 58°, low 49°.

Pressure30.42 inHg
Wind9.1 mph N
Humidity40%
Visibility—
Dew point31°
Mon, 2650° / 37°0.22Light rain
50 °Light rain

Grantsburg, Monday, 26 October

Light rain. High 50°, low 37°.

Pressure30.42 inHg
Wind9.4 mph N
Humidity51%
Visibility—
Dew point32°
Tue, 2745° / 29°0Clear
45 °Clear

Grantsburg, Tuesday, 27 October

Clear. High 45°, low 29°.

Pressure30.50 inHg
Wind6.4 mph N
Humidity41%
Visibility—
Dew point19°
Wed, 2850° / 30°0Clear
50 °Clear

Grantsburg, Wednesday, 28 October

Clear. High 50°, low 30°.

Pressure30.18 inHg
Wind15.1 mph SW
Humidity35%
Visibility—
Dew point19°
Thu, 2948° / 30°0Clear
48 °Clear

Grantsburg, Thursday, 29 October

Clear. High 48°, low 30°.

Pressure30.15 inHg
Wind12.1 mph NW
Humidity37%
Visibility—
Dew point21°
Fri, 3051° / 29°0Clear
51 °Clear

Grantsburg, Friday, 30 October

Clear. High 51°, low 29°.

Pressure30.12 inHg
Wind15.6 mph S
Humidity37%
Visibility—
Dew point20°
Sat, 3155° / 44°0.04Light rain
55 °Light rain

Grantsburg, Saturday, 31 October

Light rain. High 55°, low 44°.

Pressure29.68 inHg
Wind18.2 mph S
Humidity66%
Visibility—
Dew point40°
Sun, 0162° / 42°0Overcast
62 °Overcast

Grantsburg, Sunday, 1 November

Overcast. High 62°, low 42°.

Pressure29.74 inHg
Wind12.9 mph SW
Humidity60%
Visibility—
Dew point44°
Mon, 0250° / 38°0Clear
50 °Clear

Grantsburg, Monday, 2 November

Clear. High 50°, low 38°.

Pressure30.18 inHg
Wind13.6 mph NW
Humidity40%
Visibility—
Dew point24°
Tue, 0343° / 32°0.05Light rain
43 °Light rain

Grantsburg, Tuesday, 3 November

Light rain. High 43°, low 32°.

Pressure30.33 inHg
Wind6.4 mph E
Humidity49%
Visibility—
Dew point23°
Wed, 0450° / 38°0Overcast
50 °Overcast

Grantsburg, Wednesday, 4 November

Overcast. High 50°, low 38°.

Pressure30.21 inHg
Wind9 mph E
Humidity55%
Visibility—
Dew point32°
Thu, 0551° / 37°0Overcast
51 °Overcast

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°0.07Climate normal
45 °Climate normal

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°0.03Climate normal
44 °Climate normal

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°0.04Climate normal
44 °Climate normal

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°0.1Climate normal
43 °Climate normal

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°0.11Climate normal
40 °Climate normal

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°0.06Climate normal
39 °Climate normal

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°0.07Climate normal
38 °Climate normal

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°0.07Climate normal
39 °Climate normal

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°0.03Climate normal
40 °Climate normal

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°0.04Climate normal
40 °Climate normal

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°0.09Climate normal
39 °Climate normal

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°0.07Climate normal
38 °Climate normal

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°0.08Climate normal
38 °Climate normal

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°0.07Climate normal
38 °Climate normal

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.