Monthly outlook for Grellton, WI: average high 60.8°, average low 45.6°. That is 2.7° above the climate normal for October. Precipitation is expected on 4 days (about 1.8 inches), against a normal of 5 days and 1.3 inches. The warmest day looks like 21 October (70.3°), the coolest 17 October (34.4°).
60.8°/45.6°
Average high / low
+2.7°
Above normal
4 / 5
Wet days / normal
1.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 October – 23 October
62.5°
57.1°
+3°
24 October – 2 November
58°
53.3°
+2.6°
3 November – 12 November
at normal
47.6°
—
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).
Thu, 1564° / 56°1.16
64 °
Grellton, Thursday, 15 October
Heavy rain. High 64°, low 56°.
Pressure30.03 inHg
Wind10.1 mph SE
Humidity82%
Visibility4.9 mi
Dew point53°
Fri, 1658° / 42°0.11
58 °
Grellton, Friday, 16 October
Light rain. High 58°, low 42°.
Pressure30.06 inHg
Wind17.9 mph N
Humidity64%
Visibility6.2 mi
Dew point43°
Sat, 1755° / 34°0
55 °
Grellton, Saturday, 17 October
Clear. High 55°, low 34°.
Pressure30.53 inHg
Wind7.2 mph SW
Humidity52%
Visibility6.2 mi
Dew point34°
Sun, 1860° / 42°0
60 °
Grellton, Sunday, 18 October
Clear. High 60°, low 42°.
Pressure30.39 inHg
Wind13.9 mph SW
Humidity50%
Visibility6.2 mi
Dew point37°
Mon, 1962° / 41°0
62 °
Grellton, Monday, 19 October
Clear. High 62°, low 41°.
Pressure30.39 inHg
Wind6.4 mph SW
Humidity57%
Visibility—
Dew point43°
Tue, 2066° / 43°0
66 °
Grellton, Tuesday, 20 October
Mostly clear. High 66°, low 43°.
Pressure30.33 inHg
Wind7.1 mph SE
Humidity51%
Visibility—
Dew point43°
Wed, 2170° / 48°0
70 °
Grellton, Wednesday, 21 October
Clear. High 70°, low 48°.
Pressure30.18 inHg
Wind13.6 mph S
Humidity54%
Visibility—
Dew point49°
Thu, 2263° / 59°0.5
63 °
Grellton, Thursday, 22 October
Rain. High 63°, low 59°.
Pressure29.91 inHg
Wind16.4 mph SW
Humidity94%
Visibility—
Dew point61°
Fri, 2364° / 56°0
64 °
Grellton, Friday, 23 October
Overcast. High 64°, low 56°.
Pressure30.09 inHg
Wind10.8 mph SE
Humidity72%
Visibility—
Dew point54°
Sat, 2468° / 49°0.05
68 °
Grellton, Saturday, 24 October
Light rain. High 68°, low 49°.
Pressure29.80 inHg
Wind23.7 mph SW
Humidity85%
Visibility—
Dew point60°
Sun, 2554° / 39°0
54 °
Grellton, Sunday, 25 October
Clear. High 54°, low 39°.
Pressure30.30 inHg
Wind12.7 mph W
Humidity41%
Visibility—
Dew point29°
Mon, 2651° / 35°0
51 °
Grellton, Monday, 26 October
Clear. High 51°, low 35°.
Pressure30.36 inHg
Wind10.8 mph NW
Humidity35%
Visibility—
Dew point22°
Tue, 2757° / 38°0
57 °
Grellton, Tuesday, 27 October
Mostly clear. High 57°, low 38°.
Pressure30.15 inHg
Wind21.1 mph SW
Humidity43%
Visibility—
Dew point32°
Wed, 2857° / 43°0
57 °
Grellton, Wednesday, 28 October
Overcast. High 57°, low 43°.
Pressure30.00 inHg
Wind12.9 mph SW
Humidity44%
Visibility—
Dew point33°
Thu, 2962° / 45°0
62 °
Grellton, Thursday, 29 October
Mostly clear. High 62°, low 45°.
Pressure29.94 inHg
Wind13.2 mph SW
Humidity61%
Visibility—
Dew point45°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 3055° / 40°0.09
55 °
Grellton, Friday, 30 October
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.09 in
Chance of precipitation30%
Record high76° (2024)
Record low21° (1988)
Sat, 3153° / 40°0.09
53 °
Grellton, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.09 in
Chance of precipitation33%
Record high69° (1971)
Record low23° (2019)
Sun, 0152° / 39°0.2
52 °
Grellton, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.2 in
Chance of precipitation38%
Record high70° (2000)
Record low15° (2019)
Mon, 0251° / 38°0.12
51 °
Grellton, Monday, 2 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.12 in
Chance of precipitation33%
Record high71° (1961)
Record low19° (1991)
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)
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.