Monthly outlook for Sidney, MI: average high 64.1°, average low 45.5°. That is 3.2° above the climate normal for October. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 15 October (77.5°), the coolest 18 October (33.8°).
64.1°/45.5°
Average high / low
+3.2°
Above normal
3 / 5
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
66.7°
59.8°
+3.8°
18 October – 27 October
59.8°
55.5°
+2.4°
28 October – 6 November
at normal
51.9°
—
October records over 66 years
85.1°3 October 2025All-time high
23.2°29 October 1967All-time low
Climate normals and records are computed from the nearest reference point — Crystal (10 mi).
Fri, 0969° / 40°0
69 °
Sidney, Friday, 9 October
Partly cloudy. High 69°, low 40°.
Pressure30.18 inHg
Wind5.3 mph SW
Humidity45%
Visibility6.2 mi
Dew point42°
Sat, 1074° / 52°0
74 °
Sidney, Saturday, 10 October
Overcast. High 74°, low 52°.
Pressure30.18 inHg
Wind8.6 mph S
Humidity57%
Visibility6.2 mi
Dew point53°
Sun, 1169° / 55°0
69 °
Sidney, Sunday, 11 October
Overcast. High 69°, low 55°.
Pressure30.03 inHg
Wind4.9 mph SE
Humidity68%
Visibility6.2 mi
Dew point54°
Mon, 1273° / 53°0
73 °
Sidney, Monday, 12 October
Partly cloudy. High 73°, low 53°.
Pressure29.85 inHg
Wind8.7 mph SW
Humidity79%
Visibility6.2 mi
Dew point59°
Tue, 1359° / 47°0.09
59 °
Sidney, Tuesday, 13 October
Light rain. High 59°, low 47°.
Pressure30.00 inHg
Wind9.1 mph N
Humidity58%
Visibility—
Dew point43°
Wed, 1465° / 40°0.02
65 °
Sidney, Wednesday, 14 October
Light rain. High 65°, low 40°.
Pressure30.09 inHg
Wind12.3 mph SE
Humidity51%
Visibility—
Dew point40°
Thu, 1577° / 57°0.21
77 °
Sidney, Thursday, 15 October
Light rain. High 77°, low 57°.
Pressure29.91 inHg
Wind18.9 mph W
Humidity49%
Visibility—
Dew point55°
Fri, 1663° / 47°0
63 °
Sidney, Friday, 16 October
Overcast. High 63°, low 47°.
Pressure30.12 inHg
Wind17.7 mph NW
Humidity42%
Visibility—
Dew point39°
Sat, 1751° / 37°0
51 °
Sidney, Saturday, 17 October
Overcast. High 51°, low 37°.
Pressure30.36 inHg
Wind15.4 mph NW
Humidity35%
Visibility—
Dew point24°
Sun, 1852° / 34°0
52 °
Sidney, Sunday, 18 October
Clear. High 52°, low 34°.
Pressure30.53 inHg
Wind5.9 mph NW
Humidity39%
Visibility—
Dew point25°
Mon, 1957° / 36°0
57 °
Sidney, Monday, 19 October
Clear. High 57°, low 36°.
Pressure30.47 inHg
Wind10.9 mph SW
Humidity38%
Visibility—
Dew point29°
Tue, 2063° / 41°0
63 °
Sidney, Tuesday, 20 October
Overcast. High 63°, low 41°.
Pressure30.30 inHg
Wind9.4 mph S
Humidity30%
Visibility—
Dew point28°
Wed, 2157° / 48°0.07
57 °
Sidney, Wednesday, 21 October
Light rain. High 57°, low 48°.
Pressure30.09 inHg
Wind13.3 mph SW
Humidity81%
Visibility—
Dew point47°
Thu, 2263° / 47°0
63 °
Sidney, Thursday, 22 October
Clear. High 63°, low 47°.
Pressure30.06 inHg
Wind12.8 mph W
Humidity57%
Visibility—
Dew point46°
Fri, 2366° / 48°0
66 °
Sidney, Friday, 23 October
Clear. High 66°, low 48°.
Pressure30.15 inHg
Wind7.3 mph NW
Humidity46%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2456° / 42°0.08
56 °
Sidney, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.08 in
Chance of precipitation28%
Record high78° (1963)
Record low24° (1981)
Sun, 2555° / 42°0.08
55 °
Sidney, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.08 in
Chance of precipitation33%
Record high75° (2012)
Record low26° (1960)
Mon, 2654° / 41°0.09
54 °
Sidney, Monday, 26 October
Climate normal for this date — 60-year average.
Average high54°
Average low41°
Average precipitation0.09 in
Chance of precipitation28%
Record high74° (1963)
Record low28° (1962)
Tue, 2754° / 40°0.08
54 °
Sidney, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high54°
Average low40°
Average precipitation0.08 in
Chance of precipitation40%
Record high71° (1984)
Record low25° (1976)
Wed, 2853° / 40°0.07
53 °
Sidney, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.07 in
Chance of precipitation25%
Record high69° (1989)
Record low26° (1967)
Thu, 2952° / 39°0.06
52 °
Sidney, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.06 in
Chance of precipitation25%
Record high75° (2024)
Record low23° (1967)
Fri, 3054° / 38°0.08
54 °
Sidney, Friday, 30 October
Climate normal for this date — 60-year average.
Average high54°
Average low38°
Average precipitation0.08 in
Chance of precipitation27%
Record high74° (2024)
Record low26° (1966)
Sat, 3153° / 41°0.11
53 °
Sidney, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.11 in
Chance of precipitation35%
Record high71° (1974)
Record low25° (2020)
Sun, 0153° / 40°0.13
53 °
Sidney, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.13 in
Chance of precipitation37%
Record high70° (1999)
Record low25° (2023)
Mon, 0252° / 39°0.15
52 °
Sidney, 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 low25° (2014)
Tue, 0351° / 38°0.07
51 °
Sidney, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.07 in
Chance of precipitation32%
Record high70° (1961)
Record low22° (1991)
Wed, 0451° / 38°0.08
51 °
Sidney, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.08 in
Chance of precipitation32%
Record high70° (2015)
Record low19° (1991)
Thu, 0551° / 38°0.12
51 °
Sidney, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.12 in
Chance of precipitation30%
Record high71° (1978)
Record low18° (1966)
Fri, 0650° / 36°0.11
50 °
Sidney, Friday, 6 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.11 in
Chance of precipitation35%
Record high71° (1975)
Record low22° (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 Sidney, 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 Sidney, 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.