Monthly outlook for Montello, WI: average high 64.7°, average low 46.7°. That is 3.8° above the climate normal for October. Precipitation is expected on 3 days (about 0.8 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 10 October (77.7°), the coolest 18 October (34.5°).
64.7°/46.7°
Average high / low
+3.8°
Above normal
3 / 5
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
66.3°
59.2°
+3.9°
18 October – 27 October
62.2°
54.9°
+4°
28 October – 6 November
at normal
50.4°
—
October records over 66 years
85.5°3 October 2025All-time high
19.8°30 October 1988All-time low
Climate normals and records are computed from the nearest reference point — Harrisville (7 mi).
Fri, 0970° / 45°0
70 °
Montello, Friday, 9 October
Clear. High 70°, low 45°.
Pressure30.12 inHg
Wind6.9 mph SE
Humidity47%
Visibility6.2 mi
Dew point46°
Sat, 1078° / 52°0
78 °
Montello, Saturday, 10 October
Clear. High 78°, low 52°.
Pressure30.00 inHg
Wind9.8 mph S
Humidity55%
Visibility6.2 mi
Dew point58°
Sun, 1176° / 55°0
76 °
Montello, Sunday, 11 October
Clear. High 76°, low 55°.
Pressure29.94 inHg
Wind7.8 mph S
Humidity55%
Visibility6.2 mi
Dew point54°
Mon, 1277° / 58°0.11
77 °
Montello, Monday, 12 October
Light rain. High 77°, low 58°.
Pressure29.74 inHg
Wind8 mph W
Humidity62%
Visibility6.2 mi
Dew point61°
Tue, 1358° / 48°0
58 °
Montello, Tuesday, 13 October
Overcast. High 58°, low 48°.
Pressure30.09 inHg
Wind9.6 mph NE
Humidity57%
Visibility—
Dew point42°
Wed, 1458° / 44°0.35
58 °
Montello, Wednesday, 14 October
Rain. High 58°, low 44°.
Pressure30.00 inHg
Wind13.2 mph SE
Humidity67%
Visibility—
Dew point44°
Thu, 1572° / 59°0.04
72 °
Montello, Thursday, 15 October
Light rain. High 72°, low 59°.
Pressure29.94 inHg
Wind13.4 mph W
Humidity49%
Visibility—
Dew point48°
Fri, 1657° / 45°0
57 °
Montello, Friday, 16 October
Overcast. High 57°, low 45°.
Pressure30.30 inHg
Wind16.8 mph NW
Humidity42%
Visibility—
Dew point32°
Sat, 1750° / 37°0
50 °
Montello, Saturday, 17 October
Clear. High 50°, low 37°.
Pressure30.50 inHg
Wind13.1 mph NW
Humidity43%
Visibility—
Dew point26°
Sun, 1855° / 34°0
55 °
Montello, Sunday, 18 October
Clear. High 55°, low 34°.
Pressure30.53 inHg
Wind8.3 mph SW
Humidity34%
Visibility—
Dew point23°
Mon, 1959° / 38°0
59 °
Montello, Monday, 19 October
Mostly clear. High 59°, low 38°.
Pressure30.39 inHg
Wind11.2 mph SW
Humidity43%
Visibility—
Dew point33°
Tue, 2063° / 42°0.02
63 °
Montello, Tuesday, 20 October
Light rain. High 63°, low 42°.
Pressure30.18 inHg
Wind12.2 mph S
Humidity39%
Visibility—
Dew point35°
Wed, 2164° / 51°0.29
64 °
Montello, Wednesday, 21 October
Rain. High 64°, low 51°.
Pressure29.94 inHg
Wind14 mph SW
Humidity63%
Visibility—
Dew point50°
Thu, 2266° / 47°0
66 °
Montello, Thursday, 22 October
Clear. High 66°, low 47°.
Pressure30.12 inHg
Wind8.4 mph W
Humidity54%
Visibility—
Dew point45°
Fri, 2366° / 47°0
66 °
Montello, Friday, 23 October
Clear. High 66°, low 47°.
Pressure30.21 inHg
Wind4.7 mph SE
Humidity46%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2454° / 41°0.11
54 °
Montello, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high54°
Average low41°
Average precipitation0.11 in
Chance of precipitation38%
Record high74° (1963)
Record low23° (1981)
Sun, 2554° / 40°0.06
54 °
Montello, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high54°
Average low40°
Average precipitation0.06 in
Chance of precipitation28%
Record high75° (1989)
Record low26° (2006)
Mon, 2653° / 40°0.08
53 °
Montello, Monday, 26 October
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.08 in
Chance of precipitation22%
Record high73° (1989)
Record low24° (1962)
Tue, 2754° / 39°0.05
54 °
Montello, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.05 in
Chance of precipitation22%
Record high72° (2014)
Record low22° (2020)
Wed, 2852° / 38°0.07
52 °
Montello, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.07 in
Chance of precipitation22%
Record high68° (1974)
Record low26° (1969)
Thu, 2952° / 38°0.06
52 °
Montello, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.06 in
Chance of precipitation25%
Record high79° (2024)
Record low24° (1980)
Fri, 3053° / 39°0.1
53 °
Montello, Friday, 30 October
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.1 in
Chance of precipitation33%
Record high76° (2024)
Record low20° (1988)
Sat, 3152° / 39°0.11
52 °
Montello, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.11 in
Chance of precipitation38%
Record high66° (2000)
Record low26° (2019)
Sun, 0151° / 38°0.17
51 °
Montello, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.17 in
Chance of precipitation33%
Record high70° (2000)
Record low22° (2023)
Mon, 0249° / 37°0.11
49 °
Montello, Monday, 2 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.11 in
Chance of precipitation32%
Record high69° (1990)
Record low17° (1991)
Tue, 0349° / 36°0.06
49 °
Montello, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.06 in
Chance of precipitation27%
Record high71° (2008)
Record low15° (1991)
Wed, 0449° / 36°0.09
49 °
Montello, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.09 in
Chance of precipitation27%
Record high72° (2008)
Record low12° (1991)
Thu, 0549° / 36°0.09
49 °
Montello, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.09 in
Chance of precipitation30%
Record high67° (2015)
Record low18° (1991)
Fri, 0648° / 35°0.08
48 °
Montello, Friday, 6 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.08 in
Chance of precipitation32%
Record high69° (2020)
Record low11° (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 Montello, 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 Montello, 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.