Monthly outlook for Arnheim, MI: average high 60.9°, average low 45.5°. That is 4.4° above the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 7 days and 1.8 inches. The warmest day looks like 10 October (80.3°), the coolest 14 October (35°).
60.9°/45.5°
Average high / low
+4.4°
Above normal
2 / 7
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
61.4°
54.2°
+4°
18 October – 27 October
60.1°
50.3°
+5.4°
28 October – 6 November
at normal
45.8°
—
October records over 66 years
84.6°4 October 2025All-time high
21.4°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Chassell (8 mi).
Fri, 0962° / 46°0
62 °
Arnheim, Friday, 9 October
Overcast. High 62°, low 46°.
Pressure30.15 inHg
Wind1.5 mph S
Humidity59%
Visibility6.2 mi
Dew point43°
Sat, 1080° / 49°0
80 °
Arnheim, Saturday, 10 October
Clear. High 80°, low 49°.
Pressure29.88 inHg
Wind9.7 mph S
Humidity66%
Visibility6.2 mi
Dew point57°
Sun, 1180° / 63°0
80 °
Arnheim, Sunday, 11 October
Clear. High 80°, low 63°.
Pressure29.83 inHg
Wind9.8 mph SW
Humidity55%
Visibility6.2 mi
Dew point56°
Mon, 1262° / 46°0.01
62 °
Arnheim, Monday, 12 October
Light rain. High 62°, low 46°.
Pressure29.80 inHg
Wind10 mph N
Humidity81%
Visibility6.2 mi
Dew point47°
Tue, 1349° / 38°0
49 °
Arnheim, Tuesday, 13 October
Overcast. High 49°, low 38°.
Pressure30.18 inHg
Wind8.3 mph NE
Humidity60%
Visibility—
Dew point34°
Wed, 1455° / 35°0.01
55 °
Arnheim, Wednesday, 14 October
Light rain. High 55°, low 35°.
Pressure30.09 inHg
Wind11.3 mph SE
Humidity55%
Visibility—
Dew point36°
Thu, 1565° / 56°0.07
65 °
Arnheim, Thursday, 15 October
Light rain. High 65°, low 56°.
Pressure29.77 inHg
Wind14.8 mph W
Humidity58%
Visibility—
Dew point49°
Fri, 1655° / 43°0
55 °
Arnheim, Friday, 16 October
Overcast. High 55°, low 43°.
Pressure30.27 inHg
Wind17.6 mph W
Humidity59%
Visibility—
Dew point32°
Sat, 1745° / 37°0.01
45 °
Arnheim, Saturday, 17 October
Light rain. High 45°, low 37°.
Pressure30.47 inHg
Wind11.5 mph NW
Humidity46%
Visibility—
Dew point24°
Sun, 1859° / 35°0
59 °
Arnheim, Sunday, 18 October
Clear. High 59°, low 35°.
Pressure30.42 inHg
Wind8.4 mph SW
Humidity27%
Visibility—
Dew point20°
Mon, 1966° / 45°0
66 °
Arnheim, Monday, 19 October
Mostly clear. High 66°, low 45°.
Pressure30.24 inHg
Wind10.9 mph SW
Humidity26%
Visibility—
Dew point26°
Tue, 2062° / 45°0
62 °
Arnheim, Tuesday, 20 October
Overcast. High 62°, low 45°.
Pressure30.12 inHg
Wind10.1 mph S
Humidity35%
Visibility—
Dew point32°
Wed, 2160° / 51°0.54
60 °
Arnheim, Wednesday, 21 October
Rain. High 60°, low 51°.
Pressure29.85 inHg
Wind9.4 mph SW
Humidity71%
Visibility—
Dew point50°
Thu, 2259° / 49°0
59 °
Arnheim, Thursday, 22 October
Mostly clear. High 59°, low 49°.
Pressure30.03 inHg
Wind10 mph W
Humidity56%
Visibility—
Dew point42°
Fri, 2354° / 44°0
54 °
Arnheim, Friday, 23 October
Overcast. High 54°, low 44°.
Pressure30.24 inHg
Wind6.8 mph E
Humidity63%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2450° / 41°0.15
50 °
Arnheim, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.15 in
Chance of precipitation45%
Record high74° (1963)
Record low24° (1981)
Sun, 2550° / 40°0.11
50 °
Arnheim, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.11 in
Chance of precipitation38%
Record high73° (1989)
Record low30° (2020)
Mon, 2649° / 40°0.09
49 °
Arnheim, Monday, 26 October
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.09 in
Chance of precipitation42%
Record high73° (1989)
Record low27° (2020)
Tue, 2749° / 39°0.13
49 °
Arnheim, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high49°
Average low39°
Average precipitation0.13 in
Chance of precipitation47%
Record high68° (1989)
Record low21° (2020)
Wed, 2847° / 39°0.08
47 °
Arnheim, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high47°
Average low39°
Average precipitation0.08 in
Chance of precipitation33%
Record high65° (1974)
Record low28° (1967)
Thu, 2947° / 39°0.07
47 °
Arnheim, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high47°
Average low39°
Average precipitation0.07 in
Chance of precipitation43%
Record high64° (1989)
Record low28° (2017)
Fri, 3048° / 38°0.11
48 °
Arnheim, Friday, 30 October
Climate normal for this date — 60-year average.
Average high48°
Average low38°
Average precipitation0.11 in
Chance of precipitation40%
Record high62° (2007)
Record low26° (2019)
Sat, 3147° / 38°0.1
47 °
Arnheim, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.1 in
Chance of precipitation47%
Record high62° (1971)
Record low24° (1996)
Sun, 0146° / 38°0.12
46 °
Arnheim, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high46°
Average low38°
Average precipitation0.12 in
Chance of precipitation42%
Record high66° (1990)
Record low23° (2017)
Mon, 0245° / 37°0.1
45 °
Arnheim, Monday, 2 November
Climate normal for this date — 60-year average.
Average high45°
Average low37°
Average precipitation0.1 in
Chance of precipitation47%
Record high70° (2022)
Record low22° (1984)
Tue, 0344° / 37°0.07
44 °
Arnheim, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high44°
Average low37°
Average precipitation0.07 in
Chance of precipitation40%
Record high68° (2022)
Record low21° (1989)
Wed, 0444° / 36°0.07
44 °
Arnheim, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high44°
Average low36°
Average precipitation0.07 in
Chance of precipitation47%
Record high66° (2008)
Record low24° (1991)
Thu, 0544° / 36°0.09
44 °
Arnheim, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high44°
Average low36°
Average precipitation0.09 in
Chance of precipitation42%
Record high63° (2015)
Record low17° (1991)
Fri, 0644° / 36°0.08
44 °
Arnheim, Friday, 6 November
Climate normal for this date — 60-year average.
Average high44°
Average low36°
Average precipitation0.08 in
Chance of precipitation38%
Record high72° (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 Arnheim, MI 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 Arnheim, MI 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.