As of 21:40 EDT

Weather in Grass Lake, MI

40°Current weather

Grass Lake, Saturday, 17 October, 21:40

Clear. Feels like 36°. High 53°, low 35°.

Pressure30.45 inHg
Wind6.2 mph SW
Humidity68%
Visibility6.2 mi
Dew point31°

Monthly outlook for Grass Lake, MI: average high 61.9°, average low 43.3°. That is 3.5° above the climate normal for October. Precipitation is expected on 3 days (about 1.1 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 1 November (67.7°), the coolest 17 October (35°).

61.9°/43.3°
Average high / low
+3.5°
Above normal
3 / 5
Wet days / normal
1.1 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
17 October – 26 October61.4°56.5°+2.7°
27 October – 5 November62.8°53.3°+5.3°
6 November – 15 Novemberat normal47.9°—

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 (11 mi).

Sun, 1859° / 39°0Clear
59 °Clear

Grass Lake, Sunday, 18 October

Clear. High 59°, low 39°.

Pressure30.50 inHg
Wind9.8 mph SW
Humidity47%
Visibility6.2 mi
Dew point34°
Mon, 1964° / 41°0Clear
64 °Clear

Grass Lake, Monday, 19 October

Clear. High 64°, low 41°.

Pressure30.42 inHg
Wind3.9 mph W
Humidity51%
Visibility6.2 mi
Dew point40°
Tue, 2063° / 41°0Clear
63 °Clear

Grass Lake, Tuesday, 20 October

Clear. High 63°, low 41°.

Pressure30.45 inHg
Wind3.9 mph E
Humidity68%
Visibility6.2 mi
Dew point49°
Wed, 2163° / 42°0Clear
63 °Clear

Grass Lake, Wednesday, 21 October

Clear. High 63°, low 42°.

Pressure30.33 inHg
Wind1.9 mph SE
Humidity71%
Visibility6.2 mi
Dew point49°
Thu, 2263° / 41°0Partly cloudy
63 °Partly cloudy

Grass Lake, Thursday, 22 October

Partly cloudy. High 63°, low 41°.

Pressure30.27 inHg
Wind7.6 mph NE
Humidity56%
Visibility—
Dew point44°
Fri, 2363° / 41°0Mostly clear
63 °Mostly clear

Grass Lake, Friday, 23 October

Mostly clear. High 63°, low 41°.

Pressure30.42 inHg
Wind8.3 mph SE
Humidity52%
Visibility—
Dew point40°
Sat, 2466° / 49°0Overcast
66 °Overcast

Grass Lake, Saturday, 24 October

Overcast. High 66°, low 49°.

Pressure30.33 inHg
Wind11.6 mph S
Humidity49%
Visibility—
Dew point44°
Sun, 2564° / 48°0.01Light rain
64 °Light rain

Grass Lake, Sunday, 25 October

Light rain. High 64°, low 48°.

Pressure30.24 inHg
Wind15.3 mph W
Humidity51%
Visibility—
Dew point45°
Mon, 2655° / 38°0Clear
55 °Clear

Grass Lake, Monday, 26 October

Clear. High 55°, low 38°.

Pressure30.36 inHg
Wind8.8 mph NW
Humidity36%
Visibility—
Dew point25°
Tue, 2757° / 36°0Overcast
57 °Overcast

Grass Lake, Tuesday, 27 October

Overcast. High 57°, low 36°.

Pressure30.33 inHg
Wind8 mph SW
Humidity30%
Visibility—
Dew point23°
Wed, 2863° / 43°0Overcast
63 °Overcast

Grass Lake, Wednesday, 28 October

Overcast. High 63°, low 43°.

Pressure30.18 inHg
Wind11 mph SW
Humidity37%
Visibility—
Dew point34°
Thu, 2965° / 57°0.16Light rain
65 °Light rain

Grass Lake, Thursday, 29 October

Light rain. High 65°, low 57°.

Pressure29.91 inHg
Wind19.1 mph SW
Humidity52%
Visibility—
Dew point45°
Fri, 3064° / 48°0.1Light rain
64 °Light rain

Grass Lake, Friday, 30 October

Light rain. High 64°, low 48°.

Pressure29.85 inHg
Wind15.7 mph SW
Humidity69%
Visibility—
Dew point52°
Sat, 3161° / 44°0Overcast
61 °Overcast

Grass Lake, Saturday, 31 October

Overcast. High 61°, low 44°.

Pressure30.18 inHg
Wind14 mph SE
Humidity32%
Visibility—
Dew point28°
Sun, 0168° / 49°0.8Rain
68 °Rain

Grass Lake, Sunday, 1 November

Rain. High 68°, low 49°.

Pressure29.71 inHg
Wind20.1 mph SW
Humidity76%
Visibility—
Dew point58°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0253° / 40°0.16Climate normal
53 °Climate normal

Grass Lake, 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°0.08Climate normal
52 °Climate normal

Grass Lake, 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°0.06Climate normal
51 °Climate normal

Grass Lake, 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°0.07Climate normal
52 °Climate normal

Grass Lake, 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)
Fri, 0651° / 37°0.06Climate normal
51 °Climate normal

Grass Lake, Friday, 6 November

Climate normal for this date — 60-year average.

Average high51°
Average low37°
Average precipitation0.06 in
Chance of precipitation27%
Record high72° (1975)
Record low25° (1967)
Sat, 0749° / 37°0.09Climate normal
49 °Climate normal

Grass Lake, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high49°
Average low37°
Average precipitation0.09 in
Chance of precipitation28%
Record high67° (2020)
Record low22° (1991)
Sun, 0850° / 37°0.03Climate normal
50 °Climate normal

Grass Lake, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high50°
Average low37°
Average precipitation0.03 in
Chance of precipitation18%
Record high68° (2020)
Record low18° (1991)
Mon, 0950° / 37°0.11Climate normal
50 °Climate normal

Grass Lake, Monday, 9 November

Climate normal for this date — 60-year average.

Average high50°
Average low37°
Average precipitation0.11 in
Chance of precipitation37%
Record high71° (2020)
Record low20° (1991)
Tue, 1049° / 37°0.12Climate normal
49 °Climate normal

Grass Lake, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high49°
Average low37°
Average precipitation0.12 in
Chance of precipitation33%
Record high70° (2020)
Record low19° (2017)
Wed, 1147° / 35°0.1Climate normal
47 °Climate normal

Grass Lake, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high47°
Average low35°
Average precipitation0.1 in
Chance of precipitation32%
Record high67° (1964)
Record low21° (2017)
Thu, 1245° / 33°0.06Climate normal
45 °Climate normal

Grass Lake, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high45°
Average low33°
Average precipitation0.06 in
Chance of precipitation20%
Record high67° (1964)
Record low10° (2019)
Fri, 1345° / 33°0.05Climate normal
45 °Climate normal

Grass Lake, Friday, 13 November

Climate normal for this date — 60-year average.

Average high45°
Average low33°
Average precipitation0.05 in
Chance of precipitation18%
Record high64° (1989)
Record low5° (2019)
Sat, 1446° / 33°0.09Climate normal
46 °Climate normal

Grass Lake, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high46°
Average low33°
Average precipitation0.09 in
Chance of precipitation32%
Record high62° (1973)
Record low12° (1986)
Sun, 1546° / 34°0.13Climate normal
46 °Climate normal

Grass Lake, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high46°
Average low34°
Average precipitation0.13 in
Chance of precipitation37%
Record high66° (2025)
Record low20° (1967)

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 Grass Lake, 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 Grass Lake, 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.