Monthly outlook for Arnheim, MI: average high 56.9°, average low 41.7°. That is 2.4° above the climate normal for October. Precipitation is expected on 8 days (about 1.9 inches), against a normal of 7 days and 1.9 inches. The warmest day looks like 11 October (80.4°), the coolest 18 October (30.6°).
56.9°/41.7°
Average high / low
+2.4°
Above normal
8 / 7
Wet days / normal
1.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 October – 18 October
58.6°
53.7°
+2.7°
19 October – 28 October
54°
49.9°
+2.3°
29 October – 7 November
at normal
45.4°
—
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).
Sat, 1080° / 46°0
80 °
Arnheim, Saturday, 10 October
Mostly clear. High 80°, low 46°.
Pressure29.88 inHg
Wind9.4 mph S
Humidity68%
Visibility6.2 mi
Dew point57°
Sun, 1180° / 61°0
80 °
Arnheim, Sunday, 11 October
Clear. High 80°, low 61°.
Pressure29.80 inHg
Wind9.3 mph SW
Humidity53%
Visibility6.2 mi
Dew point55°
Mon, 1263° / 48°0.11
63 °
Arnheim, Monday, 12 October
Light rain. High 63°, low 48°.
Pressure29.80 inHg
Wind8.3 mph NE
Humidity90%
Visibility6.2 mi
Dew point51°
Tue, 1352° / 45°0.05
52 °
Arnheim, Tuesday, 13 October
Light rain. High 52°, low 45°.
Pressure30.00 inHg
Wind7 mph NE
Humidity79%
Visibility6.2 mi
Dew point42°
Wed, 1455° / 45°0
55 °
Arnheim, Wednesday, 14 October
Overcast. High 55°, low 45°.
Pressure30.18 inHg
Wind6 mph E
Humidity60%
Visibility—
Dew point40°
Thu, 1558° / 45°0.41
58 °
Arnheim, Thursday, 15 October
Rain. High 58°, low 45°.
Pressure29.94 inHg
Wind11.4 mph S
Humidity45%
Visibility—
Dew point35°
Fri, 1653° / 39°0.61
53 °
Arnheim, Friday, 16 October
Rain. High 53°, low 39°.
Pressure29.41 inHg
Wind15.5 mph NW
Humidity69%
Visibility—
Dew point34°
Sat, 1738° / 32°0.35
38 °
Arnheim, Saturday, 17 October
Snow. High 38°, low 32°.
Pressure30.30 inHg
Wind17.9 mph N
Humidity57%
Visibility—
Dew point23°
Sun, 1847° / 31°0
47 °
Arnheim, Sunday, 18 October
Partly cloudy. High 47°, low 31°.
Pressure30.24 inHg
Wind9.1 mph S
Humidity45%
Visibility—
Dew point23°
Mon, 1953° / 33°0
53 °
Arnheim, Monday, 19 October
Partly cloudy. High 53°, low 33°.
Pressure30.12 inHg
Wind6.1 mph SW
Humidity43%
Visibility—
Dew point28°
Tue, 2058° / 38°0
58 °
Arnheim, Tuesday, 20 October
Clear. High 58°, low 38°.
Pressure30.30 inHg
Wind10.6 mph S
Humidity46%
Visibility—
Dew point34°
Wed, 2160° / 50°0
60 °
Arnheim, Wednesday, 21 October
Overcast. High 60°, low 50°.
Pressure30.03 inHg
Wind12.4 mph S
Humidity57%
Visibility—
Dew point43°
Thu, 2264° / 47°0.13
64 °
Arnheim, Thursday, 22 October
Light rain. High 64°, low 47°.
Pressure29.77 inHg
Wind15.9 mph SW
Humidity60%
Visibility—
Dew point46°
Fri, 2350° / 36°0.25
50 °
Arnheim, Friday, 23 October
Snow. High 50°, low 36°.
Pressure29.62 inHg
Wind16.3 mph NW
Humidity87%
Visibility—
Dew point40°
Sat, 2439° / 32°0.06
39 °
Arnheim, Saturday, 24 October
Light snow. High 39°, low 32°.
Pressure30.27 inHg
Wind11.2 mph N
Humidity51%
Visibility—
Dew point22°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Sat, 0744° / 35°0.06
44 °
Arnheim, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high44°
Average low35°
Average precipitation0.06 in
Chance of precipitation40%
Record high67° (2020)
Record low18° (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.