Monthly outlook for Alvin, MI: average high 57.8°, average low 46°. That is 2.5° above the climate normal for October. Precipitation is expected on 5 days (about 1.9 inches), against a normal of 6 days and 1.5 inches. The warmest day looks like 13 October (72.1°), the coolest 17 October (33.2°).
57.8°/46°
Average high / low
+2.5°
Above normal
5 / 6
Wet days / normal
1.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 October – 22 October
60.8°
54.2°
+3.6°
23 October – 1 November
52.9°
51°
+1.1°
2 November – 11 November
at normal
46.9°
—
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).
Wed, 1460° / 50°0.07
60 °
Alvin, Wednesday, 14 October
Light rain. High 60°, low 50°.
Pressure30.06 inHg
Wind10.5 mph NW
Humidity66%
Visibility6.2 mi
Dew point45°
Thu, 1555° / 46°0.28
55 °
Alvin, Thursday, 15 October
Rain. High 55°, low 46°.
Pressure30.24 inHg
Wind7.5 mph SE
Humidity69%
Visibility6.2 mi
Dew point44°
Fri, 1653° / 41°0.32
53 °
Alvin, Friday, 16 October
Rain. High 53°, low 41°.
Pressure29.77 inHg
Wind9.2 mph N
Humidity90%
Visibility6.2 mi
Dew point46°
Sat, 1755° / 33°0
55 °
Alvin, Saturday, 17 October
Clear. High 55°, low 33°.
Pressure30.39 inHg
Wind7.2 mph W
Humidity55%
Visibility6.2 mi
Dew point28°
Sun, 1863° / 43°0
63 °
Alvin, Sunday, 18 October
Overcast. High 63°, low 43°.
Pressure30.15 inHg
Wind15.3 mph SW
Humidity46%
Visibility—
Dew point39°
Mon, 1965° / 48°0
65 °
Alvin, Monday, 19 October
Overcast. High 65°, low 48°.
Pressure30.24 inHg
Wind10.3 mph SW
Humidity50%
Visibility—
Dew point42°
Tue, 2066° / 47°0
66 °
Alvin, Tuesday, 20 October
Clear. High 66°, low 47°.
Pressure30.30 inHg
Wind5.6 mph SW
Humidity52%
Visibility—
Dew point45°
Wed, 2163° / 49°0
63 °
Alvin, Wednesday, 21 October
Partly cloudy. High 63°, low 49°.
Pressure30.15 inHg
Wind5.9 mph W
Humidity61%
Visibility—
Dew point48°
Thu, 2257° / 53°0.03
57 °
Alvin, Thursday, 22 October
Light rain. High 57°, low 53°.
Pressure30.15 inHg
Wind9.7 mph E
Humidity81%
Visibility—
Dew point51°
Fri, 2360° / 54°0.89
60 °
Alvin, Friday, 23 October
Rain. High 60°, low 54°.
Pressure29.85 inHg
Wind15.9 mph SE
Humidity95%
Visibility—
Dew point53°
Sat, 2454° / 47°0.02
54 °
Alvin, Saturday, 24 October
Light rain. High 54°, low 47°.
Pressure30.12 inHg
Wind11.4 mph W
Humidity74%
Visibility—
Dew point46°
Sun, 2551° / 43°0
51 °
Alvin, Sunday, 25 October
Overcast. High 51°, low 43°.
Pressure30.36 inHg
Wind6.9 mph NE
Humidity56%
Visibility—
Dew point35°
Mon, 2652° / 42°0.01
52 °
Alvin, Monday, 26 October
Light rain. High 52°, low 42°.
Pressure30.00 inHg
Wind10 mph S
Humidity64%
Visibility—
Dew point39°
Tue, 2751° / 42°0
51 °
Alvin, Tuesday, 27 October
Overcast. High 51°, low 42°.
Pressure30.06 inHg
Wind8.1 mph NW
Humidity55%
Visibility—
Dew point33°
Wed, 2848° / 38°0
48 °
Alvin, Wednesday, 28 October
Overcast. High 48°, low 38°.
Pressure30.06 inHg
Wind6.9 mph N
Humidity46%
Visibility—
Dew point27°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Wed, 1144° / 37°0.09
44 °
Alvin, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high44°
Average low37°
Average precipitation0.09 in
Chance of precipitation35%
Record high62° (2020)
Record low22° (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.