Monthly outlook for Duplain, MI: average high 66.8°, average low 48.3°. That is 4.4° above the climate normal for October. Precipitation is expected on 7 days (about 0.8 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 15 October (83.7°), the coolest 14 October (34.6°).
66.8°/48.3°
Average high / low
+4.4°
Above normal
7 / 5
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
72°
60.3°
+6.5°
18 October – 27 October
58.2°
56°
+1.2°
28 October – 6 November
at normal
52.4°
—
October records over 66 years
84.9°3 October 2023All-time high
22.1°29 October 1967All-time low
Climate normals and records are computed from the nearest reference point — St. Johns (6 mi).
Fri, 0969° / 48°0
69 °
Duplain, Friday, 9 October
Partly cloudy. High 69°, low 48°.
Pressure30.18 inHg
Wind4.9 mph SW
Humidity62%
Visibility6.2 mi
Dew point51°
Sat, 1079° / 56°0
79 °
Duplain, Saturday, 10 October
Clear. High 79°, low 56°.
Pressure30.21 inHg
Wind9.8 mph S
Humidity50%
Visibility6.2 mi
Dew point52°
Sun, 1169° / 58°0
69 °
Duplain, Sunday, 11 October
Overcast. High 69°, low 58°.
Pressure30.12 inHg
Wind8.3 mph S
Humidity63%
Visibility6.2 mi
Dew point54°
Mon, 1275° / 53°0
75 °
Duplain, Monday, 12 October
Partly cloudy. High 75°, low 53°.
Pressure29.80 inHg
Wind12.2 mph SW
Humidity61%
Visibility—
Dew point56°
Tue, 1367° / 41°0.09
67 °
Duplain, Tuesday, 13 October
Light rain. High 67°, low 41°.
Pressure29.88 inHg
Wind18.5 mph NW
Humidity58%
Visibility—
Dew point42°
Wed, 1459° / 35°0
59 °
Duplain, Wednesday, 14 October
Overcast. High 59°, low 35°.
Pressure30.15 inHg
Wind8.7 mph SE
Humidity34%
Visibility—
Dew point25°
Thu, 1584° / 52°0.04
84 °
Duplain, Thursday, 15 October
Light rain. High 84°, low 52°.
Pressure29.83 inHg
Wind18.7 mph SW
Humidity44%
Visibility—
Dew point54°
Fri, 1681° / 69°0.19
81 °
Duplain, Friday, 16 October
Rain. High 81°, low 69°.
Pressure29.88 inHg
Wind21.6 mph SW
Humidity64%
Visibility—
Dew point65°
Sat, 1770° / 52°0.19
70 °
Duplain, Saturday, 17 October
Light rain. High 70°, low 52°.
Pressure30.06 inHg
Wind15 mph SW
Humidity68%
Visibility—
Dew point47°
Sun, 1854° / 47°0.04
54 °
Duplain, Sunday, 18 October
Light rain. High 54°, low 47°.
Pressure30.21 inHg
Wind9.7 mph SW
Humidity61%
Visibility—
Dew point39°
Mon, 1959° / 41°0
59 °
Duplain, Monday, 19 October
Mostly clear. High 59°, low 41°.
Pressure30.27 inHg
Wind7.8 mph W
Humidity47%
Visibility—
Dew point35°
Tue, 2064° / 43°0
64 °
Duplain, Tuesday, 20 October
Clear. High 64°, low 43°.
Pressure30.03 inHg
Wind13.8 mph NW
Humidity49%
Visibility—
Dew point42°
Wed, 2154° / 38°0
54 °
Duplain, Wednesday, 21 October
Clear. High 54°, low 38°.
Pressure30.24 inHg
Wind8.5 mph NE
Humidity45%
Visibility—
Dew point30°
Thu, 2260° / 38°0.05
60 °
Duplain, Thursday, 22 October
Light rain. High 60°, low 38°.
Pressure29.85 inHg
Wind14.5 mph S
Humidity43%
Visibility—
Dew point33°
Fri, 2360° / 50°0.21
60 °
Duplain, Friday, 23 October
Rain. High 60°, low 50°.
Pressure29.68 inHg
Wind18.5 mph SW
Humidity72%
Visibility—
Dew point50°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2456° / 42°0.09
56 °
Duplain, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.09 in
Chance of precipitation37%
Record high78° (1963)
Record low23° (1981)
Sun, 2556° / 41°0.09
56 °
Duplain, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.09 in
Chance of precipitation33%
Record high75° (1963)
Record low25° (1960)
Mon, 2655° / 41°0.09
55 °
Duplain, Monday, 26 October
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.09 in
Chance of precipitation28%
Record high75° (1963)
Record low27° (1962)
Tue, 2754° / 40°0.09
54 °
Duplain, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high54°
Average low40°
Average precipitation0.09 in
Chance of precipitation32%
Record high74° (2023)
Record low23° (1976)
Wed, 2854° / 40°0.06
54 °
Duplain, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high54°
Average low40°
Average precipitation0.06 in
Chance of precipitation25%
Record high70° (1989)
Record low26° (1976)
Thu, 2953° / 39°0.05
53 °
Duplain, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.05 in
Chance of precipitation22%
Record high75° (2024)
Record low22° (1967)
Fri, 3055° / 39°0.07
55 °
Duplain, Friday, 30 October
Climate normal for this date — 60-year average.
Average high55°
Average low39°
Average precipitation0.07 in
Chance of precipitation23%
Record high74° (2024)
Record low27° (1988)
Sat, 3154° / 41°0.11
54 °
Duplain, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high54°
Average low41°
Average precipitation0.11 in
Chance of precipitation30%
Record high72° (1974)
Record low24° (1988)
Sun, 0153° / 40°0.13
53 °
Duplain, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.13 in
Chance of precipitation42%
Record high71° (2016)
Record low24° (2023)
Mon, 0252° / 39°0.15
52 °
Duplain, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.15 in
Chance of precipitation42%
Record high71° (1961)
Record low24° (2014)
Tue, 0351° / 38°0.07
51 °
Duplain, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.07 in
Chance of precipitation27%
Record high71° (1987)
Record low22° (1991)
Wed, 0451° / 38°0.07
51 °
Duplain, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.07 in
Chance of precipitation30%
Record high71° (2015)
Record low19° (1991)
Thu, 0551° / 38°0.13
51 °
Duplain, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.13 in
Chance of precipitation30%
Record high72° (1978)
Record low19° (1991)
Fri, 0651° / 36°0.09
51 °
Duplain, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.09 in
Chance of precipitation33%
Record high72° (1975)
Record low24° (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 Duplain, 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 Duplain, 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.