Monthly outlook for Waterloo, MI: average high 63.9°, average low 46.2°. That is 2.4° above the climate normal for October. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 15 October (78.5°), the coolest 18 October (34°).
63.9°/46.2°
Average high / low
+2.4°
Above normal
2 / 5
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
7 October – 16 October
70.1°
61.2°
+4.9°
17 October – 26 October
53.5°
56.5°
-1.7°
27 October – 5 November
at normal
53.3°
—
October records over 66 years
85.6°3 October 2025All-time high
25.3°31 October 1988All-time low
Climate normals and records are computed from the nearest reference point — Chelsea (7 mi).
Thu, 0868° / 45°0
68 °
Waterloo, Thursday, 8 October
Overcast. High 68°, low 45°.
Pressure30.00 inHg
Wind12.5 mph W
Humidity51%
Visibility6.2 mi
Dew point44°
Fri, 0969° / 43°0
69 °
Waterloo, Friday, 9 October
Overcast. High 69°, low 43°.
Pressure30.21 inHg
Wind6.8 mph W
Humidity50%
Visibility6.2 mi
Dew point46°
Sat, 1078° / 54°0.03
78 °
Waterloo, Saturday, 10 October
Light rain. High 78°, low 54°.
Pressure30.24 inHg
Wind9.6 mph S
Humidity50%
Visibility6.2 mi
Dew point51°
Sun, 1162° / 58°0.21
62 °
Waterloo, Sunday, 11 October
Light rain. High 62°, low 58°.
Pressure30.12 inHg
Wind7.4 mph SE
Humidity90%
Visibility6.2 mi
Dew point57°
Mon, 1273° / 54°0
73 °
Waterloo, Monday, 12 October
Clear. High 73°, low 54°.
Pressure29.85 inHg
Wind8 mph SW
Humidity62%
Visibility—
Dew point55°
Tue, 1366° / 44°0.09
66 °
Waterloo, Tuesday, 13 October
Light rain. High 66°, low 44°.
Pressure29.88 inHg
Wind16.6 mph NW
Humidity69%
Visibility—
Dew point47°
Wed, 1459° / 38°0
59 °
Waterloo, Wednesday, 14 October
Overcast. High 59°, low 38°.
Pressure30.12 inHg
Wind10.9 mph SE
Humidity43%
Visibility—
Dew point34°
Thu, 1579° / 53°0
79 °
Waterloo, Thursday, 15 October
Clear. High 79°, low 53°.
Pressure29.91 inHg
Wind17.3 mph S
Humidity44%
Visibility—
Dew point49°
Fri, 1673° / 51°0
73 °
Waterloo, Friday, 16 October
Light rain. High 73°, low 51°.
Pressure30.12 inHg
Wind15.4 mph W
Humidity44%
Visibility—
Dew point45°
Sat, 1751° / 44°0.01
51 °
Waterloo, Saturday, 17 October
Light rain. High 51°, low 44°.
Pressure30.18 inHg
Wind14 mph N
Humidity50%
Visibility—
Dew point32°
Sun, 1853° / 34°0
53 °
Waterloo, Sunday, 18 October
Mostly clear. High 53°, low 34°.
Pressure30.36 inHg
Wind9.5 mph N
Humidity42%
Visibility—
Dew point28°
Mon, 1953° / 34°0
53 °
Waterloo, Monday, 19 October
Mostly clear. High 53°, low 34°.
Pressure30.59 inHg
Wind11.9 mph SE
Humidity33%
Visibility—
Dew point22°
Tue, 2049° / 39°0
49 °
Waterloo, Tuesday, 20 October
Overcast. High 49°, low 39°.
Pressure30.42 inHg
Wind8.7 mph S
Humidity46%
Visibility—
Dew point27°
Wed, 2160° / 48°0.01
60 °
Waterloo, Wednesday, 21 October
Light rain. High 60°, low 48°.
Pressure30.06 inHg
Wind9.6 mph W
Humidity68%
Visibility—
Dew point48°
Thu, 2255° / 46°0
55 °
Waterloo, Thursday, 22 October
Overcast. High 55°, low 46°.
Pressure29.80 inHg
Wind5.5 mph N
Humidity54%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2357° / 43°0.09
57 °
Waterloo, Friday, 23 October
Climate normal for this date — 60-year average.
Average high57°
Average low43°
Average precipitation0.09 in
Chance of precipitation27%
Record high79° (1963)
Record low27° (1969)
Sat, 2456° / 43°0.08
56 °
Waterloo, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high56°
Average low43°
Average precipitation0.08 in
Chance of precipitation30%
Record high78° (1963)
Record low26° (1981)
Sun, 2556° / 42°0.09
56 °
Waterloo, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.09 in
Chance of precipitation33%
Record high77° (1963)
Record low28° (1960)
Mon, 2655° / 42°0.07
55 °
Waterloo, Monday, 26 October
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.07 in
Chance of precipitation25%
Record high77° (1963)
Record low26° (1962)
Tue, 2755° / 41°0.11
55 °
Waterloo, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.11 in
Chance of precipitation38%
Record high74° (2023)
Record low27° (1962)
Wed, 2854° / 41°0.06
54 °
Waterloo, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high54°
Average low41°
Average precipitation0.06 in
Chance of precipitation27%
Record high69° (1989)
Record low27° (1976)
Thu, 2953° / 40°0.05
53 °
Waterloo, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.05 in
Chance of precipitation15%
Record high74° (2024)
Record low26° (1965)
Fri, 3055° / 40°0.07
55 °
Waterloo, Friday, 30 October
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.07 in
Chance of precipitation25%
Record high73° (2024)
Record low28° (1988)
Sat, 3155° / 42°0.11
55 °
Waterloo, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.11 in
Chance of precipitation35%
Record high72° (1974)
Record low25° (1988)
Sun, 0154° / 42°0.12
54 °
Waterloo, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.12 in
Chance of precipitation40%
Record high73° (2016)
Record low25° (2023)
Mon, 0253° / 40°0.16
53 °
Waterloo, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.16 in
Chance of precipitation43%
Record high71° (1961)
Record low26° (2014)
Tue, 0352° / 39°0.08
52 °
Waterloo, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.08 in
Chance of precipitation27%
Record high72° (1987)
Record low22° (1991)
Wed, 0451° / 39°0.06
51 °
Waterloo, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.06 in
Chance of precipitation30%
Record high72° (2015)
Record low18° (1991)
Thu, 0552° / 39°0.07
52 °
Waterloo, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.07 in
Chance of precipitation27%
Record high71° (1978)
Record low19° (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 Waterloo, 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 Waterloo, 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.