Monthly outlook for Lachine, MI: average high 60.4°, average low 44.6°. That is 3° above the climate normal for October. Precipitation is expected on 4 days (about 1.6 inches), against a normal of 6 days and 1.6 inches. The warmest day looks like 11 October (73.8°), the coolest 18 October (33.3°).
60.4°/44.6°
Average high / low
+3°
Above normal
4 / 6
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
61.8°
56.2°
+3.1°
18 October – 27 October
58°
52.5°
+3°
28 October – 6 November
at normal
48.9°
—
October records over 66 years
82°5 October 2025All-time high
28.9°31 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Alpena (13 mi).
Fri, 0962° / 44°0
62 °
Lachine, Friday, 9 October
Overcast. High 62°, low 44°.
Pressure30.18 inHg
Wind7.4 mph NW
Humidity58%
Visibility6.2 mi
Dew point43°
Sat, 1074° / 47°0
74 °
Lachine, Saturday, 10 October
Clear. High 74°, low 47°.
Pressure30.18 inHg
Wind9.8 mph SE
Humidity61%
Visibility6.2 mi
Dew point51°
Sun, 1174° / 57°0
74 °
Lachine, Sunday, 11 October
Clear. High 74°, low 57°.
Pressure30.03 inHg
Wind9.3 mph S
Humidity57%
Visibility6.2 mi
Dew point53°
Mon, 1273° / 55°0.02
73 °
Lachine, Monday, 12 October
Light rain. High 73°, low 55°.
Pressure29.71 inHg
Wind10.5 mph NW
Humidity59%
Visibility—
Dew point56°
Tue, 1353° / 45°0.01
53 °
Lachine, Tuesday, 13 October
Light rain. High 53°, low 45°.
Pressure29.97 inHg
Wind7.9 mph N
Humidity71%
Visibility—
Dew point42°
Wed, 1457° / 43°0
57 °
Lachine, Wednesday, 14 October
Overcast. High 57°, low 43°.
Pressure30.15 inHg
Wind5.8 mph NW
Humidity41%
Visibility—
Dew point31°
Thu, 1557° / 48°1.1
57 °
Lachine, Thursday, 15 October
Rain. High 57°, low 48°.
Pressure30.00 inHg
Wind14.6 mph SE
Humidity94%
Visibility—
Dew point51°
Fri, 1663° / 45°0
63 °
Lachine, Friday, 16 October
Partly cloudy. High 63°, low 45°.
Pressure29.94 inHg
Wind20.3 mph W
Humidity53%
Visibility—
Dew point41°
Sat, 1748° / 35°0
48 °
Lachine, Saturday, 17 October
Clear. High 48°, low 35°.
Pressure30.62 inHg
Wind13.3 mph N
Humidity42%
Visibility—
Dew point23°
Sun, 1855° / 33°0
55 °
Lachine, Sunday, 18 October
Overcast. High 55°, low 33°.
Pressure30.47 inHg
Wind8 mph SW
Humidity32%
Visibility—
Dew point23°
Mon, 1960° / 39°0.06
60 °
Lachine, Monday, 19 October
Light rain. High 60°, low 39°.
Pressure30.24 inHg
Wind7.5 mph S
Humidity35%
Visibility—
Dew point30°
Tue, 2063° / 50°0.08
63 °
Lachine, Tuesday, 20 October
Light rain. High 63°, low 50°.
Pressure29.94 inHg
Wind12.8 mph W
Humidity61%
Visibility—
Dew point48°
Wed, 2163° / 47°0
63 °
Lachine, Wednesday, 21 October
Overcast. High 63°, low 47°.
Pressure29.85 inHg
Wind14.2 mph W
Humidity47%
Visibility—
Dew point40°
Thu, 2259° / 44°0.3
59 °
Lachine, Thursday, 22 October
Rain. High 59°, low 44°.
Pressure29.80 inHg
Wind11.7 mph S
Humidity56%
Visibility—
Dew point41°
Fri, 2348° / 39°0.04
48 °
Lachine, Friday, 23 October
Light rain. High 48°, low 39°.
Pressure29.97 inHg
Wind15.5 mph W
Humidity68%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2453° / 44°0.05
53 °
Lachine, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high53°
Average low44°
Average precipitation0.05 in
Chance of precipitation35%
Record high70° (1963)
Record low29° (1981)
Sun, 2552° / 44°0.06
52 °
Lachine, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high52°
Average low44°
Average precipitation0.06 in
Chance of precipitation38%
Record high68° (1963)
Record low32° (1972)
Mon, 2651° / 43°0.07
51 °
Lachine, Monday, 26 October
Climate normal for this date — 60-year average.
Average high51°
Average low43°
Average precipitation0.07 in
Chance of precipitation35%
Record high69° (1963)
Record low33° (1976)
Tue, 2751° / 43°0.11
51 °
Lachine, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high51°
Average low43°
Average precipitation0.11 in
Chance of precipitation37%
Record high70° (2023)
Record low31° (1976)
Wed, 2850° / 42°0.04
50 °
Lachine, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high50°
Average low42°
Average precipitation0.04 in
Chance of precipitation27%
Record high62° (1971)
Record low30° (1965)
Thu, 2949° / 41°0.04
49 °
Lachine, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high49°
Average low41°
Average precipitation0.04 in
Chance of precipitation30%
Record high71° (2024)
Record low31° (1965)
Fri, 3050° / 42°0.08
50 °
Lachine, Friday, 30 October
Climate normal for this date — 60-year average.
Average high50°
Average low42°
Average precipitation0.08 in
Chance of precipitation27%
Record high74° (2024)
Record low30° (2020)
Sat, 3151° / 42°0.09
51 °
Lachine, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.09 in
Chance of precipitation43%
Record high71° (2024)
Record low29° (2020)
Sun, 0149° / 41°0.11
49 °
Lachine, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high49°
Average low41°
Average precipitation0.11 in
Chance of precipitation40%
Record high66° (2022)
Record low29° (2023)
Mon, 0249° / 40°0.11
49 °
Lachine, Monday, 2 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.11 in
Chance of precipitation38%
Record high64° (1990)
Record low28° (1984)
Tue, 0348° / 40°0.07
48 °
Lachine, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high48°
Average low40°
Average precipitation0.07 in
Chance of precipitation33%
Record high65° (2022)
Record low26° (1991)
Wed, 0448° / 40°0.09
48 °
Lachine, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high48°
Average low40°
Average precipitation0.09 in
Chance of precipitation35%
Record high69° (2020)
Record low26° (1991)
Thu, 0548° / 40°0.11
48 °
Lachine, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low40°
Average precipitation0.11 in
Chance of precipitation33%
Record high65° (2024)
Record low24° (1991)
Fri, 0647° / 38°0.13
47 °
Lachine, Friday, 6 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.13 in
Chance of precipitation32%
Record high69° (2020)
Record low25° (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 Lachine, 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 Lachine, 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.