Monthly outlook for Chatham, MI: average high 57.4°, average low 43.9°. That is 3° above the climate normal for October. Precipitation is expected on 6 days (about 2.1 inches), against a normal of 9 days and 2.5 inches. The warmest day looks like 22 October (69°), the coolest 24 October (34.4°).
57.4°/43.9°
Average high / low
+3°
Above normal
6 / 9
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
58.7°
53°
+3.2°
22 October – 31 October
55.3°
49.7°
+3.1°
1 November – 10 November
at normal
45.1°
—
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).
Tue, 1362° / 46°0.38
62 °
Chatham, Tuesday, 13 October
Heavy rain. High 62°, low 46°.
Pressure29.74 inHg
Wind8.2 mph N
Humidity90%
Visibility6.2 mi
Dew point51°
Wed, 1454° / 46°0.02
54 °
Chatham, Wednesday, 14 October
Light rain. High 54°, low 46°.
Pressure30.18 inHg
Wind12.4 mph NW
Humidity77%
Visibility6.2 mi
Dew point45°
Thu, 1558° / 42°0.01
58 °
Chatham, Thursday, 15 October
Light rain. High 58°, low 42°.
Pressure30.21 inHg
Wind6.8 mph S
Humidity65%
Visibility6.2 mi
Dew point43°
Fri, 1650° / 44°0.37
50 °
Chatham, Friday, 16 October
Rain. High 50°, low 44°.
Pressure30.36 inHg
Wind25.1 mph N
Humidity70%
Visibility—
Dew point36°
Sat, 1762° / 36°0
62 °
Chatham, Saturday, 17 October
Clear. High 62°, low 36°.
Pressure30.18 inHg
Wind13.6 mph SW
Humidity33%
Visibility—
Dew point28°
Sun, 1858° / 38°0
58 °
Chatham, Sunday, 18 October
Overcast. High 58°, low 38°.
Pressure29.97 inHg
Wind17.3 mph SW
Humidity46%
Visibility—
Dew point32°
Mon, 1965° / 43°0
65 °
Chatham, Monday, 19 October
Partly cloudy. High 65°, low 43°.
Pressure30.06 inHg
Wind11 mph SW
Humidity50%
Visibility—
Dew point40°
Tue, 2058° / 47°0
58 °
Chatham, Tuesday, 20 October
Clear. High 58°, low 47°.
Pressure30.36 inHg
Wind8.4 mph NE
Humidity60%
Visibility—
Dew point43°
Wed, 2160° / 46°0
60 °
Chatham, Wednesday, 21 October
Overcast. High 60°, low 46°.
Pressure30.33 inHg
Wind13.8 mph S
Humidity69%
Visibility—
Dew point48°
Thu, 2269° / 56°0.1
69 °
Chatham, Thursday, 22 October
Light rain. High 69°, low 56°.
Pressure30.00 inHg
Wind16.5 mph S
Humidity61%
Visibility—
Dew point53°
Fri, 2353° / 41°0.4
53 °
Chatham, Friday, 23 October
Rain. High 53°, low 41°.
Pressure30.18 inHg
Wind17.6 mph NW
Humidity70%
Visibility—
Dew point41°
Sat, 2451° / 34°0
51 °
Chatham, Saturday, 24 October
Clear. High 51°, low 34°.
Pressure30.36 inHg
Wind14.6 mph S
Humidity47%
Visibility—
Dew point29°
Sun, 2549° / 46°0.46
49 °
Chatham, Sunday, 25 October
Rain. High 49°, low 46°.
Pressure29.83 inHg
Wind12.3 mph N
Humidity98%
Visibility—
Dew point47°
Mon, 2651° / 44°0
51 °
Chatham, Monday, 26 October
Mostly clear. High 51°, low 44°.
Pressure30.09 inHg
Wind12.9 mph N
Humidity60%
Visibility—
Dew point36°
Tue, 2760° / 45°0
60 °
Chatham, Tuesday, 27 October
Clear. High 60°, low 45°.
Pressure30.03 inHg
Wind6.3 mph S
Humidity50%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2848° / 40°0.1
48 °
Chatham, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high48°
Average low40°
Average precipitation0.1 in
Chance of precipitation45%
Record high61° (1984)
Record low30° (1965)
Thu, 2948° / 40°0.09
48 °
Chatham, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high48°
Average low40°
Average precipitation0.09 in
Chance of precipitation38%
Record high71° (2024)
Record low29° (2020)
Fri, 3049° / 40°0.09
49 °
Chatham, Friday, 30 October
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.09 in
Chance of precipitation40%
Record high72° (2024)
Record low29° (2023)
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)
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.