Monthly outlook for Grellton, WI: average high 63.4°, average low 46.6°. That is 4.9° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 1 November (74.1°), the coolest 26 October (34.5°).
63.4°/46.6°
Average high / low
+4.9°
Above normal
1 / 5
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
18 October – 27 October
61.9°
55.6°
+3.5°
28 October – 6 November
65.7°
51.4°
+8°
7 November – 16 November
at normal
45.4°
—
October records over 66 years
84.9°3 October 2025All-time high
20.7°30 October 1988All-time low
Climate normals and records are computed from the nearest reference point — Reeseville (12 mi).
Mon, 1963° / 45°0
63 °
Grellton, Monday, 19 October
Partly cloudy. High 63°, low 45°.
Pressure30.39 inHg
Wind3.6 mph SW
Humidity60%
Visibility6.2 mi
Dew point46°
Tue, 2065° / 41°0
65 °
Grellton, Tuesday, 20 October
Clear. High 65°, low 41°.
Pressure30.39 inHg
Wind4.4 mph SE
Humidity62%
Visibility6.2 mi
Dew point49°
Wed, 2166° / 43°0
66 °
Grellton, Wednesday, 21 October
Clear. High 66°, low 43°.
Pressure30.27 inHg
Wind5.5 mph SW
Humidity58%
Visibility6.2 mi
Dew point48°
Thu, 2266° / 50°0
66 °
Grellton, Thursday, 22 October
Partly cloudy. High 66°, low 50°.
Pressure30.30 inHg
Wind7 mph E
Humidity67%
Visibility—
Dew point53°
Fri, 2363° / 44°0
63 °
Grellton, Friday, 23 October
Partly cloudy. High 63°, low 44°.
Pressure30.36 inHg
Wind10 mph SE
Humidity59%
Visibility—
Dew point45°
Sat, 2470° / 57°0.02
70 °
Grellton, Saturday, 24 October
Light rain. High 70°, low 57°.
Pressure30.12 inHg
Wind19.4 mph S
Humidity41%
Visibility—
Dew point42°
Sun, 2552° / 39°0.01
52 °
Grellton, Sunday, 25 October
Light rain. High 52°, low 39°.
Pressure30.42 inHg
Wind15.4 mph NW
Humidity33%
Visibility—
Dew point22°
Mon, 2656° / 35°0
56 °
Grellton, Monday, 26 October
Clear. High 56°, low 35°.
Pressure30.33 inHg
Wind12.5 mph SW
Humidity29%
Visibility—
Dew point20°
Tue, 2757° / 45°0.03
57 °
Grellton, Tuesday, 27 October
Light rain. High 57°, low 45°.
Pressure30.15 inHg
Wind8.5 mph SW
Humidity72%
Visibility—
Dew point46°
Wed, 2860° / 50°0.02
60 °
Grellton, Wednesday, 28 October
Light rain. High 60°, low 50°.
Pressure29.91 inHg
Wind14.7 mph SW
Humidity76%
Visibility—
Dew point51°
Thu, 2964° / 50°0
64 °
Grellton, Thursday, 29 October
Overcast. High 64°, low 50°.
Pressure29.74 inHg
Wind11.7 mph SW
Humidity40%
Visibility—
Dew point38°
Fri, 3068° / 45°0
68 °
Grellton, Friday, 30 October
Overcast. High 68°, low 45°.
Pressure29.68 inHg
Wind18.1 mph S
Humidity61%
Visibility—
Dew point50°
Sat, 3169° / 54°0.08
69 °
Grellton, Saturday, 31 October
Light rain. High 69°, low 54°.
Pressure29.68 inHg
Wind12.6 mph SW
Humidity58%
Visibility—
Dew point51°
Sun, 0174° / 58°0.01
74 °
Grellton, Sunday, 1 November
Light rain. High 74°, low 58°.
Pressure29.83 inHg
Wind15.4 mph SW
Humidity50%
Visibility—
Dew point51°
Mon, 0260° / 47°0
60 °
Grellton, Monday, 2 November
Mostly clear. High 60°, low 47°.
Pressure30.30 inHg
Wind12.5 mph NE
Humidity37%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0350° / 37°0.05
50 °
Grellton, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.05 in
Chance of precipitation27%
Record high70° (2008)
Record low16° (1991)
Wed, 0449° / 37°0.08
49 °
Grellton, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.08 in
Chance of precipitation25%
Record high71° (2008)
Record low13° (1991)
Thu, 0549° / 37°0.09
49 °
Grellton, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.09 in
Chance of precipitation28%
Record high68° (2015)
Record low18° (1991)
Fri, 0649° / 35°0.08
49 °
Grellton, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.08 in
Chance of precipitation30%
Record high69° (1975)
Record low15° (1991)
Sat, 0748° / 35°0.03
48 °
Grellton, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.03 in
Chance of precipitation17%
Record high68° (2020)
Record low7° (1991)
Sun, 0848° / 35°0.04
48 °
Grellton, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.04 in
Chance of precipitation18%
Record high70° (2020)
Record low6° (2019)
Mon, 0948° / 35°0.1
48 °
Grellton, Monday, 9 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.1 in
Chance of precipitation35%
Record high73° (2020)
Record low19° (1991)
Tue, 1046° / 34°0.11
46 °
Grellton, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.11 in
Chance of precipitation35%
Record high71° (2022)
Record low13° (2017)
Wed, 1144° / 31°0.07
44 °
Grellton, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.07 in
Chance of precipitation28%
Record high67° (1964)
Record low13° (2019)
Thu, 1243° / 30°0.06
43 °
Grellton, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high43°
Average low30°
Average precipitation0.06 in
Chance of precipitation28%
Record high63° (1964)
Record low4° (2019)
Fri, 1344° / 30°0.04
44 °
Grellton, Friday, 13 November
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.04 in
Chance of precipitation23%
Record high66° (1999)
Record low6° (1986)
Sat, 1444° / 31°0.04
44 °
Grellton, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.04 in
Chance of precipitation22%
Record high65° (1971)
Record low11° (1995)
Sun, 1544° / 32°0.05
44 °
Grellton, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.05 in
Chance of precipitation25%
Record high67° (2025)
Record low11° (1995)
Mon, 1644° / 31°0.04
44 °
Grellton, Monday, 16 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.04 in
Chance of precipitation20%
Record high61° (1988)
Record low20° (1989)
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 Grellton, 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 Grellton, 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.