Monthly outlook for Hamilton, WI: average high 64.5°, average low 49°. That is 4° above the climate normal for October. Precipitation is expected on 5 days (about 1.0 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 10 October (76.2°), the coolest 18 October (37.4°).
64.5°/49°
Average high / low
+4°
Above normal
5 / 5
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
66.1°
58.4°
+4.3°
18 October – 27 October
61.7°
54.4°
+4.1°
28 October – 6 November
at normal
50.5°
—
October records over 66 years
85.3°3 October 2025All-time high
26.2°31 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Grafton (3 mi).
Fri, 0971° / 48°0.03
71 °
Hamilton, Friday, 9 October
Light rain. High 71°, low 48°.
Pressure30.15 inHg
Wind6.2 mph SE
Humidity46%
Visibility6.2 mi
Dew point45°
Sat, 1076° / 57°0.03
76 °
Hamilton, Saturday, 10 October
Light rain. High 76°, low 57°.
Pressure30.06 inHg
Wind9.3 mph S
Humidity54%
Visibility6.2 mi
Dew point56°
Sun, 1173° / 54°0
73 °
Hamilton, Sunday, 11 October
Clear. High 73°, low 54°.
Pressure29.97 inHg
Wind5.3 mph S
Humidity61%
Visibility6.2 mi
Dew point57°
Mon, 1276° / 59°0.07
76 °
Hamilton, Monday, 12 October
Light rain. High 76°, low 59°.
Pressure29.77 inHg
Wind11.5 mph SW
Humidity61%
Visibility6.2 mi
Dew point60°
Tue, 1356° / 50°0.1
56 °
Hamilton, Tuesday, 13 October
Light rain. High 56°, low 50°.
Pressure30.06 inHg
Wind11.4 mph NE
Humidity69%
Visibility—
Dew point46°
Wed, 1459° / 49°0.52
59 °
Hamilton, Wednesday, 14 October
Rain. High 59°, low 49°.
Pressure30.06 inHg
Wind13.4 mph SE
Humidity67%
Visibility—
Dew point44°
Thu, 1571° / 62°0.09
71 °
Hamilton, Thursday, 15 October
Light rain. High 71°, low 62°.
Pressure29.94 inHg
Wind13.3 mph W
Humidity51%
Visibility—
Dew point51°
Fri, 1661° / 47°0
61 °
Hamilton, Friday, 16 October
Overcast. High 61°, low 47°.
Pressure30.27 inHg
Wind16.1 mph NW
Humidity47%
Visibility—
Dew point37°
Sat, 1749° / 38°0
49 °
Hamilton, Saturday, 17 October
Clear. High 49°, low 38°.
Pressure30.47 inHg
Wind13.2 mph NW
Humidity37%
Visibility—
Dew point22°
Sun, 1854° / 37°0
54 °
Hamilton, Sunday, 18 October
Mostly clear. High 54°, low 37°.
Pressure30.53 inHg
Wind6.4 mph NW
Humidity33%
Visibility—
Dew point22°
Mon, 1959° / 40°0
59 °
Hamilton, Monday, 19 October
Clear. High 59°, low 40°.
Pressure30.42 inHg
Wind10.5 mph SW
Humidity42%
Visibility—
Dew point32°
Tue, 2063° / 44°0
63 °
Hamilton, Tuesday, 20 October
Partly cloudy. High 63°, low 44°.
Pressure30.24 inHg
Wind9.5 mph S
Humidity40%
Visibility—
Dew point35°
Wed, 2165° / 52°0.15
65 °
Hamilton, Wednesday, 21 October
Light rain. High 65°, low 52°.
Pressure30.00 inHg
Wind12.3 mph SW
Humidity80%
Visibility—
Dew point52°
Thu, 2265° / 48°0
65 °
Hamilton, Thursday, 22 October
Clear. High 65°, low 48°.
Pressure30.12 inHg
Wind9.1 mph W
Humidity55%
Visibility—
Dew point45°
Fri, 2365° / 50°0
65 °
Hamilton, Friday, 23 October
Clear. High 65°, low 50°.
Pressure30.18 inHg
Wind5.7 mph NW
Humidity45%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2454° / 46°0.09
54 °
Hamilton, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high54°
Average low46°
Average precipitation0.09 in
Chance of precipitation43%
Record high76° (2023)
Record low29° (2020)
Sun, 2554° / 45°0.07
54 °
Hamilton, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high54°
Average low45°
Average precipitation0.07 in
Chance of precipitation32%
Record high70° (2023)
Record low31° (2025)
Mon, 2652° / 45°0.11
52 °
Hamilton, Monday, 26 October
Climate normal for this date — 60-year average.
Average high52°
Average low45°
Average precipitation0.11 in
Chance of precipitation28%
Record high71° (1963)
Record low29° (1962)
Tue, 2753° / 44°0.09
53 °
Hamilton, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low44°
Average precipitation0.09 in
Chance of precipitation30%
Record high68° (2023)
Record low28° (2020)
Wed, 2852° / 44°0.07
52 °
Hamilton, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low44°
Average precipitation0.07 in
Chance of precipitation20%
Record high62° (1984)
Record low30° (2020)
Thu, 2951° / 43°0.05
51 °
Hamilton, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high51°
Average low43°
Average precipitation0.05 in
Chance of precipitation17%
Record high78° (2024)
Record low29° (1988)
Fri, 3053° / 44°0.08
53 °
Hamilton, Friday, 30 October
Climate normal for this date — 60-year average.
Average high53°
Average low44°
Average precipitation0.08 in
Chance of precipitation25%
Record high76° (2024)
Record low28° (2020)
Sat, 3152° / 44°0.1
52 °
Hamilton, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high52°
Average low44°
Average precipitation0.1 in
Chance of precipitation43%
Record high68° (2024)
Record low26° (2019)
Sun, 0151° / 42°0.18
51 °
Hamilton, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.18 in
Chance of precipitation45%
Record high68° (2022)
Record low19° (2019)
Mon, 0250° / 41°0.14
50 °
Hamilton, Monday, 2 November
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.14 in
Chance of precipitation38%
Record high65° (2022)
Record low24° (1991)
Tue, 0349° / 41°0.06
49 °
Hamilton, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high49°
Average low41°
Average precipitation0.06 in
Chance of precipitation23%
Record high67° (2022)
Record low20° (1991)
Wed, 0449° / 42°0.09
49 °
Hamilton, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high49°
Average low42°
Average precipitation0.09 in
Chance of precipitation30%
Record high68° (2022)
Record low17° (1991)
Thu, 0549° / 41°0.1
49 °
Hamilton, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high49°
Average low41°
Average precipitation0.1 in
Chance of precipitation32%
Record high67° (2020)
Record low23° (1991)
Fri, 0649° / 39°0.09
49 °
Hamilton, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low39°
Average precipitation0.09 in
Chance of precipitation28%
Record high70° (2020)
Record low20° (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 Hamilton, 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 Hamilton, 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.