Monthly outlook for Belleville, WI: average high 61.6°, average low 47.7°. That is 2.8° above the climate normal for October. Precipitation is expected on 4 days (about 1.1 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 12 October (81.3°), the coolest 17 October (28.8°).
61.6°/47.7°
Average high / low
+2.8°
Above normal
4 / 5
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
62.4°
57.7°
+2.6°
21 October – 30 October
60.2°
54.1°
+3.4°
31 October – 9 November
at normal
49°
—
October records over 66 years
84.7°3 October 2025All-time high
21.6°30 October 1988All-time low
Climate normals and records are computed from the nearest reference point — Mount Horeb (14 mi).
Mon, 1281° / 61°0
81 °
Belleville, Monday, 12 October
Mostly clear. High 81°, low 61°.
Pressure29.80 inHg
Wind12.4 mph SW
Humidity68%
Visibility6.2 mi
Dew point64°
Tue, 1374° / 61°0.27
74 °
Belleville, Tuesday, 13 October
Heavy rain. High 74°, low 61°.
Pressure29.83 inHg
Wind9.3 mph NW
Humidity72%
Visibility6.2 mi
Dew point62°
Wed, 1465° / 56°0.03
65 °
Belleville, Wednesday, 14 October
Light rain. High 65°, low 56°.
Pressure30.12 inHg
Wind7.5 mph NE
Humidity68%
Visibility6.2 mi
Dew point53°
Thu, 1558° / 53°0.47
58 °
Belleville, Thursday, 15 October
Rain. High 58°, low 53°.
Pressure30.15 inHg
Wind10.8 mph E
Humidity80%
Visibility6.2 mi
Dew point51°
Fri, 1658° / 45°0
58 °
Belleville, Friday, 16 October
Overcast. High 58°, low 45°.
Pressure30.39 inHg
Wind19.5 mph N
Humidity49%
Visibility—
Dew point37°
Sat, 1743° / 29°0
43 °
Belleville, Saturday, 17 October
Clear. High 43°, low 29°.
Pressure30.53 inHg
Wind12.8 mph NW
Humidity30%
Visibility—
Dew point11°
Sun, 1849° / 29°0
49 °
Belleville, Sunday, 18 October
Overcast. High 49°, low 29°.
Pressure30.36 inHg
Wind21 mph S
Humidity43%
Visibility—
Dew point24°
Mon, 1960° / 40°0
60 °
Belleville, Monday, 19 October
Mostly clear. High 60°, low 40°.
Pressure30.27 inHg
Wind15.7 mph SW
Humidity54%
Visibility—
Dew point39°
Tue, 2062° / 43°0
62 °
Belleville, Tuesday, 20 October
Clear. High 62°, low 43°.
Pressure30.30 inHg
Wind9.9 mph S
Humidity45%
Visibility—
Dew point37°
Wed, 2160° / 49°0
60 °
Belleville, Wednesday, 21 October
Overcast. High 60°, low 49°.
Pressure30.18 inHg
Wind13.9 mph S
Humidity48%
Visibility—
Dew point39°
Thu, 2266° / 54°0
66 °
Belleville, Thursday, 22 October
Overcast. High 66°, low 54°.
Pressure30.21 inHg
Wind8.3 mph S
Humidity68%
Visibility—
Dew point53°
Fri, 2359° / 53°0.06
59 °
Belleville, Friday, 23 October
Light rain. High 59°, low 53°.
Pressure30.15 inHg
Wind5.6 mph E
Humidity84%
Visibility—
Dew point50°
Sat, 2465° / 48°0
65 °
Belleville, Saturday, 24 October
Clear. High 65°, low 48°.
Pressure30.18 inHg
Wind8.7 mph E
Humidity63%
Visibility—
Dew point49°
Sun, 2563° / 46°0.3
63 °
Belleville, Sunday, 25 October
Rain. High 63°, low 46°.
Pressure29.88 inHg
Wind18 mph NW
Humidity77%
Visibility—
Dew point54°
Mon, 2647° / 43°0
47 °
Belleville, Monday, 26 October
Overcast. High 47°, low 43°.
Pressure29.80 inHg
Wind18.7 mph NW
Humidity68%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2753° / 39°0.06
53 °
Belleville, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.06 in
Chance of precipitation22%
Record high71° (2014)
Record low24° (2020)
Wed, 2852° / 39°0.06
52 °
Belleville, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.06 in
Chance of precipitation25%
Record high68° (1974)
Record low25° (1969)
Thu, 2953° / 39°0.05
53 °
Belleville, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.05 in
Chance of precipitation18%
Record high77° (2024)
Record low23° (2019)
Fri, 3054° / 40°0.09
54 °
Belleville, Friday, 30 October
Climate normal for this date — 60-year average.
Average high54°
Average low40°
Average precipitation0.09 in
Chance of precipitation28%
Record high74° (2024)
Record low22° (1988)
Sat, 3152° / 40°0.1
52 °
Belleville, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high52°
Average low40°
Average precipitation0.1 in
Chance of precipitation32%
Record high67° (1968)
Record low22° (2019)
Sun, 0151° / 38°0.21
51 °
Belleville, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.21 in
Chance of precipitation33%
Record high71° (2000)
Record low19° (2019)
Mon, 0250° / 37°0.12
50 °
Belleville, Monday, 2 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.12 in
Chance of precipitation32%
Record high68° (1961)
Record low17° (1991)
Tue, 0349° / 37°0.06
49 °
Belleville, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.06 in
Chance of precipitation23%
Record high69° (1964)
Record low14° (1991)
Wed, 0449° / 37°0.09
49 °
Belleville, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.09 in
Chance of precipitation28%
Record high69° (2008)
Record low11° (1991)
Thu, 0549° / 36°0.09
49 °
Belleville, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.09 in
Chance of precipitation27%
Record high68° (2020)
Record low18° (1991)
Fri, 0648° / 35°0.07
48 °
Belleville, Friday, 6 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.07 in
Chance of precipitation32%
Record high68° (2020)
Record low14° (1991)
Sat, 0748° / 35°0.03
48 °
Belleville, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.03 in
Chance of precipitation18%
Record high67° (2020)
Record low5° (1991)
Sun, 0848° / 35°0.04
48 °
Belleville, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.04 in
Chance of precipitation22%
Record high70° (2020)
Record low9° (1991)
Mon, 0947° / 35°0.1
47 °
Belleville, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.1 in
Chance of precipitation33%
Record high71° (2020)
Record low17° (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 Belleville, 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 Belleville, 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.