Monthly outlook for Alvin, MI: average high 60.7°, average low 45.7°. That is 3.9° above the climate normal for October. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 6 days and 1.5 inches. The warmest day looks like 12 October (74.4°), the coolest 18 October (36.8°).
60.7°/45.7°
Average high / low
+3.9°
Above normal
3 / 6
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
62.4°
54.7°
+4.3°
22 October – 31 October
57.9°
51.3°
+3.7°
1 November – 10 November
at normal
47.4°
—
October records over 66 years
81.1°5 October 2025All-time high
27.5°31 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Au Sable (9 mi).
Tue, 1374° / 58°0.02
74 °
Alvin, Tuesday, 13 October
Light rain. High 74°, low 58°.
Pressure29.62 inHg
Wind11.7 mph W
Humidity75%
Visibility6.2 mi
Dew point66°
Wed, 1458° / 48°0
58 °
Alvin, Wednesday, 14 October
Overcast. High 58°, low 48°.
Pressure30.06 inHg
Wind11.2 mph NW
Humidity63%
Visibility6.2 mi
Dew point43°
Thu, 1558° / 47°0.01
58 °
Alvin, Thursday, 15 October
Light rain. High 58°, low 47°.
Pressure30.30 inHg
Wind6 mph SE
Humidity58%
Visibility6.2 mi
Dew point41°
Fri, 1653° / 43°0.04
53 °
Alvin, Friday, 16 October
Light rain. High 53°, low 43°.
Pressure30.00 inHg
Wind24.8 mph NW
Humidity57%
Visibility—
Dew point38°
Sat, 1758° / 37°0
58 °
Alvin, Saturday, 17 October
Clear. High 58°, low 37°.
Pressure30.24 inHg
Wind12.1 mph W
Humidity36%
Visibility—
Dew point29°
Sun, 1858° / 37°0
58 °
Alvin, Sunday, 18 October
Mostly clear. High 58°, low 37°.
Pressure30.18 inHg
Wind16.3 mph SW
Humidity37%
Visibility—
Dew point28°
Mon, 1966° / 44°0
66 °
Alvin, Monday, 19 October
Mostly clear. High 66°, low 44°.
Pressure30.18 inHg
Wind12.4 mph SW
Humidity35%
Visibility—
Dew point35°
Tue, 2063° / 49°0
63 °
Alvin, Tuesday, 20 October
Mostly clear. High 63°, low 49°.
Pressure30.30 inHg
Wind8.3 mph NE
Humidity60%
Visibility—
Dew point47°
Wed, 2161° / 48°0
61 °
Alvin, Wednesday, 21 October
Clear. High 61°, low 48°.
Pressure30.42 inHg
Wind7.6 mph SE
Humidity63%
Visibility—
Dew point47°
Thu, 2270° / 48°0
70 °
Alvin, Thursday, 22 October
Clear. High 70°, low 48°.
Pressure30.27 inHg
Wind13.8 mph SW
Humidity56%
Visibility—
Dew point49°
Fri, 2363° / 47°0.19
63 °
Alvin, Friday, 23 October
Light rain. High 63°, low 47°.
Pressure30.00 inHg
Wind15.7 mph SW
Humidity39%
Visibility—
Dew point37°
Sat, 2451° / 37°0
51 °
Alvin, Saturday, 24 October
Clear. High 51°, low 37°.
Pressure30.45 inHg
Wind9.7 mph N
Humidity41%
Visibility—
Dew point26°
Sun, 2552° / 45°0.44
52 °
Alvin, Sunday, 25 October
Rain. High 52°, low 45°.
Pressure29.91 inHg
Wind12 mph S
Humidity82%
Visibility—
Dew point42°
Mon, 2651° / 43°0.04
51 °
Alvin, Monday, 26 October
Light rain. High 51°, low 43°.
Pressure30.00 inHg
Wind12.3 mph N
Humidity79%
Visibility—
Dew point44°
Tue, 2760° / 41°0
60 °
Alvin, Tuesday, 27 October
Mostly clear. High 60°, low 41°.
Pressure30.03 inHg
Wind4.6 mph W
Humidity48%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2850° / 43°0.04
50 °
Alvin, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high50°
Average low43°
Average precipitation0.04 in
Chance of precipitation18%
Record high62° (1971)
Record low33° (1965)
Thu, 2949° / 43°0.05
49 °
Alvin, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high49°
Average low43°
Average precipitation0.05 in
Chance of precipitation27%
Record high70° (2024)
Record low33° (1965)
Fri, 3050° / 43°0.07
50 °
Alvin, Friday, 30 October
Climate normal for this date — 60-year average.
Average high50°
Average low43°
Average precipitation0.07 in
Chance of precipitation27%
Record high72° (2024)
Record low31° (2020)
Sat, 3151° / 44°0.09
51 °
Alvin, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.09 in
Chance of precipitation33%
Record high70° (2024)
Record low28° (2020)
Sun, 0149° / 43°0.12
49 °
Alvin, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high49°
Average low43°
Average precipitation0.12 in
Chance of precipitation42%
Record high62° (2022)
Record low28° (2023)
Mon, 0249° / 42°0.12
49 °
Alvin, Monday, 2 November
Climate normal for this date — 60-year average.
Average high49°
Average low42°
Average precipitation0.12 in
Chance of precipitation35%
Record high61° (1971)
Record low29° (2020)
Tue, 0348° / 41°0.06
48 °
Alvin, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high48°
Average low41°
Average precipitation0.06 in
Chance of precipitation28%
Record high62° (1961)
Record low28° (1991)
Wed, 0448° / 41°0.08
48 °
Alvin, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high48°
Average low41°
Average precipitation0.08 in
Chance of precipitation30%
Record high63° (2022)
Record low26° (1991)
Thu, 0548° / 41°0.1
48 °
Alvin, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low41°
Average precipitation0.1 in
Chance of precipitation27%
Record high65° (2024)
Record low27° (1991)
Fri, 0648° / 40°0.12
48 °
Alvin, Friday, 6 November
Climate normal for this date — 60-year average.
Average high48°
Average low40°
Average precipitation0.12 in
Chance of precipitation35%
Record high63° (2020)
Record low25° (1991)
Sat, 0746° / 39°0.05
46 °
Alvin, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high46°
Average low39°
Average precipitation0.05 in
Chance of precipitation22%
Record high62° (2020)
Record low24° (1991)
Sun, 0846° / 39°0.06
46 °
Alvin, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high46°
Average low39°
Average precipitation0.06 in
Chance of precipitation25%
Record high61° (2020)
Record low22° (2019)
Mon, 0946° / 39°0.08
46 °
Alvin, Monday, 9 November
Climate normal for this date — 60-year average.
Average high46°
Average low39°
Average precipitation0.08 in
Chance of precipitation40%
Record high65° (2020)
Record low20° (2017)
Tue, 1046° / 39°0.09
46 °
Alvin, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high46°
Average low39°
Average precipitation0.09 in
Chance of precipitation33%
Record high65° (2020)
Record low17° (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 Alvin, 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 Alvin, 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.