Monthly outlook for Ann Arbor, MI: average high 61°, average low 44.9°. That is 1.7° above the climate normal for October. Precipitation is expected on 3 days (about 1.2 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 13 October (81.6°), the coolest 18 October (27.3°).
61°/44.9°
Average high / low
+1.7°
Above normal
3 / 5
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
63.3°
58.8°
+2.5°
21 October – 30 October
57.3°
55.5°
+1°
31 October – 9 November
at normal
51.6°
—
October records over 66 years
85.6°3 October 2025All-time high
25.3°31 October 1988All-time low
Climate normals and records are computed from the nearest reference point — Chelsea (15 mi).
Mon, 1280° / 51°0
80 °
Ann Arbor, Monday, 12 October
Mostly clear. High 80°, low 51°.
Pressure29.91 inHg
Wind6.6 mph SW
Humidity68%
Visibility6.2 mi
Dew point61°
Tue, 1382° / 65°0.02
82 °
Ann Arbor, Tuesday, 13 October
Light rain. High 82°, low 65°.
Pressure29.77 inHg
Wind13 mph SW
Humidity60%
Visibility6.2 mi
Dew point63°
Wed, 1469° / 57°0.03
69 °
Ann Arbor, Wednesday, 14 October
Light rain. High 69°, low 57°.
Pressure30.03 inHg
Wind6.9 mph N
Humidity73%
Visibility6.2 mi
Dew point57°
Thu, 1562° / 50°0.64
62 °
Ann Arbor, Thursday, 15 October
Rain. High 62°, low 50°.
Pressure30.18 inHg
Wind9.4 mph E
Humidity58%
Visibility—
Dew point46°
Fri, 1659° / 46°0.43
59 °
Ann Arbor, Friday, 16 October
Rain. High 59°, low 46°.
Pressure30.06 inHg
Wind22.4 mph NW
Humidity54%
Visibility—
Dew point42°
Sat, 1741° / 32°0
41 °
Ann Arbor, Saturday, 17 October
Partly cloudy. High 41°, low 32°.
Pressure30.30 inHg
Wind21.5 mph NW
Humidity29%
Visibility—
Dew point10°
Sun, 1849° / 27°0
49 °
Ann Arbor, Sunday, 18 October
Clear. High 49°, low 27°.
Pressure30.50 inHg
Wind13.7 mph SW
Humidity38%
Visibility—
Dew point21°
Mon, 1959° / 38°0
59 °
Ann Arbor, Monday, 19 October
Mostly clear. High 59°, low 38°.
Pressure30.30 inHg
Wind19.2 mph SW
Humidity32%
Visibility—
Dew point26°
Tue, 2064° / 42°0
64 °
Ann Arbor, Tuesday, 20 October
Clear. High 64°, low 42°.
Pressure30.36 inHg
Wind6.8 mph W
Humidity43%
Visibility—
Dew point37°
Wed, 2161° / 46°0
61 °
Ann Arbor, Wednesday, 21 October
Overcast. High 61°, low 46°.
Pressure30.36 inHg
Wind8.3 mph S
Humidity42%
Visibility—
Dew point36°
Thu, 2266° / 45°0
66 °
Ann Arbor, Thursday, 22 October
Clear. High 66°, low 45°.
Pressure30.30 inHg
Wind6.1 mph S
Humidity36%
Visibility—
Dew point35°
Fri, 2355° / 39°0
55 °
Ann Arbor, Friday, 23 October
Mostly clear. High 55°, low 39°.
Pressure30.39 inHg
Wind8.2 mph SE
Humidity41%
Visibility—
Dew point30°
Sat, 2462° / 44°0.03
62 °
Ann Arbor, Saturday, 24 October
Light rain. High 62°, low 44°.
Pressure29.88 inHg
Wind20.8 mph SW
Humidity66%
Visibility—
Dew point49°
Sun, 2552° / 42°0
52 °
Ann Arbor, Sunday, 25 October
Overcast. High 52°, low 42°.
Pressure30.24 inHg
Wind17.1 mph W
Humidity39%
Visibility—
Dew point27°
Mon, 2646° / 39°0.06
46 °
Ann Arbor, Monday, 26 October
Light rain. High 46°, low 39°.
Pressure30.06 inHg
Wind9.6 mph W
Humidity65%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2755° / 41°0.11
55 °
Ann Arbor, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.11 in
Chance of precipitation38%
Record high74° (2023)
Record low27° (1962)
Wed, 2854° / 41°0.06
54 °
Ann Arbor, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high54°
Average low41°
Average precipitation0.06 in
Chance of precipitation27%
Record high69° (1989)
Record low27° (1976)
Thu, 2953° / 40°0.05
53 °
Ann Arbor, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.05 in
Chance of precipitation15%
Record high74° (2024)
Record low26° (1965)
Fri, 3055° / 40°0.07
55 °
Ann Arbor, Friday, 30 October
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.07 in
Chance of precipitation25%
Record high73° (2024)
Record low28° (1988)
Sat, 3155° / 42°0.11
55 °
Ann Arbor, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.11 in
Chance of precipitation35%
Record high72° (1974)
Record low25° (1988)
Sun, 0154° / 42°0.12
54 °
Ann Arbor, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.12 in
Chance of precipitation40%
Record high73° (2016)
Record low25° (2023)
Mon, 0253° / 40°0.16
53 °
Ann Arbor, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.16 in
Chance of precipitation43%
Record high71° (1961)
Record low26° (2014)
Tue, 0352° / 39°0.08
52 °
Ann Arbor, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.08 in
Chance of precipitation27%
Record high72° (1987)
Record low22° (1991)
Wed, 0451° / 39°0.06
51 °
Ann Arbor, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.06 in
Chance of precipitation30%
Record high72° (2015)
Record low18° (1991)
Thu, 0552° / 39°0.07
52 °
Ann Arbor, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.07 in
Chance of precipitation27%
Record high71° (1978)
Record low19° (1991)
Fri, 0651° / 37°0.06
51 °
Ann Arbor, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.06 in
Chance of precipitation27%
Record high72° (1975)
Record low25° (1967)
Sat, 0749° / 37°0.09
49 °
Ann Arbor, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.09 in
Chance of precipitation28%
Record high67° (2020)
Record low22° (1991)
Sun, 0850° / 37°0.03
50 °
Ann Arbor, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.03 in
Chance of precipitation18%
Record high68° (2020)
Record low18° (1991)
Mon, 0950° / 37°0.11
50 °
Ann Arbor, Monday, 9 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.11 in
Chance of precipitation37%
Record high71° (2020)
Record low20° (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 Ann Arbor, 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 Ann Arbor, 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.