Monthly outlook for Casco, WI: average high 58.6°, average low 43.6°. That is 1.4° above the climate normal for October. Precipitation is expected on 4 days (about 2.0 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 10 October (79.3°), the coolest 18 October (29.5°).
58.6°/43.6°
Average high / low
+1.4°
Above normal
4 / 5
Wet days / normal
2.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
7 October – 16 October
63.2°
57.2°
+3.3°
17 October – 26 October
50.8°
53.3°
-1.4°
27 October – 5 November
at normal
49.7°
—
October records over 66 years
85.5°3 October 2025All-time high
27.1°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Algoma (9 mi).
Thu, 0863° / 47°0
63 °
Casco, Thursday, 8 October
Overcast. High 63°, low 47°.
Pressure30.03 inHg
Wind12 mph W
Humidity51%
Visibility6.2 mi
Dew point41°
Fri, 0965° / 49°0.01
65 °
Casco, Friday, 9 October
Light rain. High 65°, low 49°.
Pressure30.18 inHg
Wind6.4 mph S
Humidity44%
Visibility6.2 mi
Dew point41°
Sat, 1079° / 60°0
79 °
Casco, Saturday, 10 October
Clear. High 79°, low 60°.
Pressure29.97 inHg
Wind15.8 mph SW
Humidity45%
Visibility6.2 mi
Dew point54°
Sun, 1175° / 58°0
75 °
Casco, Sunday, 11 October
Overcast. High 75°, low 58°.
Pressure29.88 inHg
Wind14.1 mph S
Humidity51%
Visibility—
Dew point54°
Mon, 1270° / 48°0.31
70 °
Casco, Monday, 12 October
Rain. High 70°, low 48°.
Pressure29.74 inHg
Wind16 mph N
Humidity63%
Visibility—
Dew point56°
Tue, 1348° / 44°0.35
48 °
Casco, Tuesday, 13 October
Rain. High 48°, low 44°.
Pressure30.12 inHg
Wind10.9 mph N
Humidity84%
Visibility—
Dew point42°
Wed, 1452° / 41°0.06
52 °
Casco, Wednesday, 14 October
Light rain. High 52°, low 41°.
Pressure30.15 inHg
Wind17.5 mph SE
Humidity64%
Visibility—
Dew point38°
Thu, 1559° / 49°1.22
59 °
Casco, Thursday, 15 October
Rain. High 59°, low 49°.
Pressure29.71 inHg
Wind26.1 mph S
Humidity83%
Visibility—
Dew point53°
Fri, 1648° / 40°0
48 °
Casco, Friday, 16 October
Overcast. High 48°, low 40°.
Pressure30.00 inHg
Wind18.9 mph W
Humidity57%
Visibility—
Dew point30°
Sat, 1745° / 35°0
45 °
Casco, Saturday, 17 October
Overcast. High 45°, low 35°.
Pressure30.15 inHg
Wind16.5 mph N
Humidity60%
Visibility—
Dew point31°
Sun, 1849° / 30°0
49 °
Casco, Sunday, 18 October
Mostly clear. High 49°, low 30°.
Pressure30.12 inHg
Wind12.4 mph W
Humidity39%
Visibility—
Dew point21°
Mon, 1952° / 34°0
52 °
Casco, Monday, 19 October
Clear. High 52°, low 34°.
Pressure30.27 inHg
Wind7.9 mph W
Humidity49%
Visibility—
Dew point31°
Tue, 2051° / 36°0
51 °
Casco, Tuesday, 20 October
Overcast. High 51°, low 36°.
Pressure30.53 inHg
Wind7.4 mph NE
Humidity49%
Visibility—
Dew point31°
Wed, 2154° / 40°0
54 °
Casco, Wednesday, 21 October
Light rain. High 54°, low 40°.
Pressure30.27 inHg
Wind9.4 mph W
Humidity63%
Visibility—
Dew point40°
Thu, 2253° / 37°0
53 °
Casco, Thursday, 22 October
Partly cloudy. High 53°, low 37°.
Pressure30.00 inHg
Wind10 mph W
Humidity47%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2353° / 46°0.15
53 °
Casco, Friday, 23 October
Climate normal for this date — 60-year average.
Average high53°
Average low46°
Average precipitation0.15 in
Chance of precipitation47%
Record high68° (1963)
Record low33° (1969)
Sat, 2453° / 46°0.1
53 °
Casco, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high53°
Average low46°
Average precipitation0.1 in
Chance of precipitation38%
Record high70° (2023)
Record low30° (2020)
Sun, 2553° / 45°0.07
53 °
Casco, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high53°
Average low45°
Average precipitation0.07 in
Chance of precipitation33%
Record high66° (1963)
Record low30° (2020)
Mon, 2651° / 45°0.07
51 °
Casco, Monday, 26 October
Climate normal for this date — 60-year average.
Average high51°
Average low45°
Average precipitation0.07 in
Chance of precipitation27%
Record high67° (1963)
Record low30° (2020)
Tue, 2752° / 44°0.09
52 °
Casco, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high52°
Average low44°
Average precipitation0.09 in
Chance of precipitation27%
Record high68° (2023)
Record low27° (2020)
Wed, 2851° / 44°0.07
51 °
Casco, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.07 in
Chance of precipitation25%
Record high61° (1984)
Record low32° (2020)
Thu, 2950° / 44°0.05
50 °
Casco, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high50°
Average low44°
Average precipitation0.05 in
Chance of precipitation25%
Record high78° (2024)
Record low29° (1988)
Fri, 3051° / 44°0.09
51 °
Casco, Friday, 30 October
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.09 in
Chance of precipitation30%
Record high76° (2024)
Record low28° (2020)
Sat, 3151° / 44°0.11
51 °
Casco, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.11 in
Chance of precipitation37%
Record high65° (1971)
Record low28° (2023)
Sun, 0149° / 42°0.14
49 °
Casco, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high49°
Average low42°
Average precipitation0.14 in
Chance of precipitation33%
Record high65° (2022)
Record low24° (2019)
Mon, 0249° / 42°0.13
49 °
Casco, Monday, 2 November
Climate normal for this date — 60-year average.
Average high49°
Average low42°
Average precipitation0.13 in
Chance of precipitation30%
Record high61° (1961)
Record low24° (1991)
Tue, 0348° / 41°0.05
48 °
Casco, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high48°
Average low41°
Average precipitation0.05 in
Chance of precipitation27%
Record high62° (2022)
Record low22° (1991)
Wed, 0448° / 41°0.09
48 °
Casco, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high48°
Average low41°
Average precipitation0.09 in
Chance of precipitation32%
Record high65° (2022)
Record low21° (1991)
Thu, 0548° / 41°0.11
48 °
Casco, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low41°
Average precipitation0.11 in
Chance of precipitation32%
Record high65° (2024)
Record low23° (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 Casco, 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 Casco, 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.