Monthly outlook for Chatham, MI: average high 55.8°, average low 42.3°. That is 2.8° above the climate normal for October. Precipitation is expected on 4 days (about 1.8 inches), against a normal of 8 days and 2.3 inches. The warmest day looks like 23 October (65°), the coolest 30 October (34.6°).
55.8°/42.3°
Average high / low
+2.8°
Above normal
4 / 8
Wet days / normal
1.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
58.6°
51.7°
+3.9°
25 October – 3 November
51°
48.4°
+1.4°
4 November – 13 November
at normal
43.2°
—
October records over 66 years
80.1°7 October 2007All-time high
23.7°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Munising (15 mi).
Fri, 1647° / 42°1
47 °
Chatham, Friday, 16 October
Rain. High 47°, low 42°.
Pressure30.00 inHg
Wind20.3 mph N
Humidity86%
Visibility6.2 mi
Dew point41°
Sat, 1758° / 36°0
58 °
Chatham, Saturday, 17 October
Overcast. High 58°, low 36°.
Pressure30.33 inHg
Wind9.4 mph SW
Humidity52%
Visibility6.2 mi
Dew point32°
Sun, 1861° / 46°0
61 °
Chatham, Sunday, 18 October
Overcast. High 61°, low 46°.
Pressure30.09 inHg
Wind13 mph SW
Humidity44%
Visibility6.2 mi
Dew point33°
Mon, 1961° / 41°0
61 °
Chatham, Monday, 19 October
Overcast. High 61°, low 41°.
Pressure30.30 inHg
Wind8 mph SW
Humidity55%
Visibility—
Dew point42°
Tue, 2061° / 42°0
61 °
Chatham, Tuesday, 20 October
Clear. High 61°, low 42°.
Pressure30.36 inHg
Wind6.2 mph E
Humidity54%
Visibility—
Dew point42°
Wed, 2163° / 42°0
63 °
Chatham, Wednesday, 21 October
Overcast. High 63°, low 42°.
Pressure30.30 inHg
Wind10.9 mph S
Humidity57%
Visibility—
Dew point44°
Thu, 2257° / 55°0.24
57 °
Chatham, Thursday, 22 October
Light rain. High 57°, low 55°.
Pressure30.15 inHg
Wind11.5 mph S
Humidity88%
Visibility—
Dew point53°
Fri, 2365° / 56°0
65 °
Chatham, Friday, 23 October
Overcast. High 65°, low 56°.
Pressure29.88 inHg
Wind17.3 mph S
Humidity66%
Visibility—
Dew point52°
Sat, 2461° / 48°0
61 °
Chatham, Saturday, 24 October
Clear. High 61°, low 48°.
Pressure30.15 inHg
Wind9.4 mph SW
Humidity48%
Visibility—
Dew point40°
Sun, 2550° / 41°0
50 °
Chatham, Sunday, 25 October
Overcast. High 50°, low 41°.
Pressure30.24 inHg
Wind7.8 mph NW
Humidity49%
Visibility—
Dew point31°
Mon, 2653° / 39°0
53 °
Chatham, Monday, 26 October
Overcast. High 53°, low 39°.
Pressure29.88 inHg
Wind9.4 mph NW
Humidity44%
Visibility—
Dew point30°
Tue, 2748° / 36°0
48 °
Chatham, Tuesday, 27 October
Clear. High 48°, low 36°.
Pressure30.09 inHg
Wind7.4 mph W
Humidity45%
Visibility—
Dew point26°
Wed, 2855° / 36°0
55 °
Chatham, Wednesday, 28 October
Mostly clear. High 55°, low 36°.
Pressure29.83 inHg
Wind12.7 mph S
Humidity44%
Visibility—
Dew point31°
Thu, 2953° / 41°0.04
53 °
Chatham, Thursday, 29 October
Light rain. High 53°, low 41°.
Pressure29.83 inHg
Wind12.8 mph NW
Humidity46%
Visibility—
Dew point32°
Fri, 3047° / 35°0
47 °
Chatham, Friday, 30 October
Overcast. High 47°, low 35°.
Pressure30.00 inHg
Wind12.6 mph S
Humidity45%
Visibility—
Dew point25°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3149° / 40°0.13
49 °
Chatham, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.13 in
Chance of precipitation57%
Record high64° (1971)
Record low27° (1996)
Sun, 0148° / 40°0.15
48 °
Chatham, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high48°
Average low40°
Average precipitation0.15 in
Chance of precipitation52%
Record high63° (1999)
Record low27° (2023)
Mon, 0247° / 38°0.15
47 °
Chatham, Monday, 2 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.15 in
Chance of precipitation53%
Record high63° (1990)
Record low23° (1984)
Tue, 0346° / 38°0.11
46 °
Chatham, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high46°
Average low38°
Average precipitation0.11 in
Chance of precipitation50%
Record high63° (1961)
Record low22° (1991)
Wed, 0446° / 38°0.11
46 °
Chatham, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high46°
Average low38°
Average precipitation0.11 in
Chance of precipitation50%
Record high65° (2008)
Record low25° (1991)
Thu, 0546° / 38°0.17
46 °
Chatham, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high46°
Average low38°
Average precipitation0.17 in
Chance of precipitation52%
Record high61° (2015)
Record low21° (1991)
Fri, 0645° / 37°0.11
45 °
Chatham, Friday, 6 November
Climate normal for this date — 60-year average.
Average high45°
Average low37°
Average precipitation0.11 in
Chance of precipitation47%
Record high71° (2020)
Record low18° (1991)
Sat, 0744° / 36°0.08
44 °
Chatham, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high44°
Average low36°
Average precipitation0.08 in
Chance of precipitation38%
Record high66° (2020)
Record low17° (1991)
Sun, 0844° / 36°0.09
44 °
Chatham, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high44°
Average low36°
Average precipitation0.09 in
Chance of precipitation52%
Record high65° (2020)
Record low21° (1991)
Mon, 0944° / 35°0.15
44 °
Chatham, Monday, 9 November
Climate normal for this date — 60-year average.
Average high44°
Average low35°
Average precipitation0.15 in
Chance of precipitation57%
Record high65° (1999)
Record low18° (2017)
Tue, 1043° / 35°0.2
43 °
Chatham, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high43°
Average low35°
Average precipitation0.2 in
Chance of precipitation68%
Record high61° (2016)
Record low18° (2017)
Wed, 1141° / 33°0.12
41 °
Chatham, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high41°
Average low33°
Average precipitation0.12 in
Chance of precipitation50%
Record high60° (1964)
Record low18° (2019)
Thu, 1240° / 33°0.15
40 °
Chatham, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high40°
Average low33°
Average precipitation0.15 in
Chance of precipitation57%
Record high55° (1964)
Record low16° (2019)
Fri, 1340° / 33°0.14
40 °
Chatham, Friday, 13 November
Climate normal for this date — 60-year average.
Average high40°
Average low33°
Average precipitation0.14 in
Chance of precipitation55%
Record high59° (1999)
Record low12° (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 Chatham, 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 Chatham, 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.