As of 11:08 EDT

Weather in Grass Lake, MI

63°

Grass Lake, Wednesday, 28 October, 11:08

Clear. Feels like 62°. High 69°, low 51°.

Pressure30.24 inHg

Wind3 mph SW

Humidity68%

Visibility6.2 mi

Dew point52°

See detailed hourly forecast

Monthly outlook for Grass Lake, MI: average high 55.8°, average low 44.3°. That is 2.5° above the climate normal for October. Precipitation is expected on 7 days (about 1.6 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 29 October (70.3°), the coolest 8 November (32°).

55.8°/44.3°

Average high / low

+2.5°

Above normal

7 / 5

Wet days / normal

1.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
28 October – 6 November	61.2°	52.9°	+4.6°
7 November – 16 November	46.7°	47.3°	-0.3°
17 November – 26 November	at normal	43.8°	—

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).

Thu, 2970° / 53°

0.1

70 °

Grass Lake, Thursday, 29 October

Rain. High 70°, low 53°.

Pressure30.06 inHg

Wind10.2 mph SW

Humidity62%

Visibility6.2 mi

Dew point53°

Fri, 3059° / 42°

59 °

Grass Lake, Friday, 30 October

Overcast. High 59°, low 42°.

Pressure30.36 inHg

Wind4.3 mph N

Humidity63%

Visibility6.2 mi

Dew point41°

Sat, 3158° / 50°

58 °

Grass Lake, Saturday, 31 October

Overcast. High 58°, low 50°.

Pressure30.39 inHg

Wind7.2 mph SE

Humidity72%

Visibility6.2 mi

Dew point47°

Sun, 0162° / 49°

62 °

Grass Lake, Sunday, 1 November

Overcast. High 62°, low 49°.

Pressure30.33 inHg

Wind4.1 mph SE

Humidity55%

Visibility—

Dew point44°

Mon, 0266° / 45°

66 °

Grass Lake, Monday, 2 November

Overcast. High 66°, low 45°.

Pressure30.24 inHg

Wind8.1 mph SE

Humidity59%

Visibility—

Dew point48°

Tue, 0357° / 53°

57 °

Grass Lake, Tuesday, 3 November

Overcast. High 57°, low 53°.

Pressure30.09 inHg

Wind13.7 mph E

Humidity84%

Visibility—

Dew point51°

Wed, 0457° / 53°

0.05

57 °

Grass Lake, Wednesday, 4 November

Light rain. High 57°, low 53°.

Pressure29.94 inHg

Wind15.2 mph SE

Humidity82%

Visibility—

Dew point51°

Thu, 0560° / 55°

0.39

60 °

Grass Lake, Thursday, 5 November

Rain. High 60°, low 55°.

Pressure29.65 inHg

Wind8.3 mph SE

Humidity90%

Visibility—

Dew point57°

Fri, 0653° / 39°

0.27

53 °

Grass Lake, Friday, 6 November

Rain. High 53°, low 39°.

Pressure29.85 inHg

Wind16.7 mph NW

Humidity51%

Visibility—

Dew point30°

Sat, 0744° / 35°

44 °

Grass Lake, Saturday, 7 November

Overcast. High 44°, low 35°.

Pressure30.27 inHg

Wind9 mph N

Humidity51%

Visibility—

Dew point26°

Sun, 0846° / 32°

46 °

Grass Lake, Sunday, 8 November

Clear. High 46°, low 32°.

Pressure30.42 inHg

Wind4.3 mph S

Humidity46%

Visibility—

Dew point24°

Mon, 0949° / 34°

49 °

Grass Lake, Monday, 9 November

Mostly clear. High 49°, low 34°.

Pressure30.30 inHg

Wind8.3 mph SE

Humidity47%

Visibility—

Dew point28°

Tue, 1051° / 40°

0.2

51 °

Grass Lake, Tuesday, 10 November

Light rain. High 51°, low 40°.

Pressure30.03 inHg

Wind7.5 mph S

Humidity67%

Visibility—

Dew point39°

Wed, 1147° / 39°

0.49

47 °

Grass Lake, Wednesday, 11 November

Rain. High 47°, low 39°.

Pressure30.00 inHg

Wind18.4 mph NE

Humidity92%

Visibility—

Dew point39°

Thu, 1243° / 39°

0.1

43 °

Grass Lake, Thursday, 12 November

Light rain. High 43°, low 39°.

Pressure29.97 inHg

Wind16.9 mph NE

Humidity89%

Visibility—

Dew point39°

From day 17 onward the outlook is built from 60-year climate statistics

Fri, 1345° / 33°

0.05

45 °

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°

0.09

46 °

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°

0.13

46 °

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)

Mon, 1645° / 32°

0.07

45 °

Grass Lake, Monday, 16 November

Climate normal for this date — 60-year average.

Average high45°

Average low32°

Average precipitation0.07 in

Chance of precipitation25%

Record high61° (1988)

Record low14° (2019)

Tue, 1745° / 33°

0.07

45 °

Grass Lake, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high45°

Average low33°

Average precipitation0.07 in

Chance of precipitation30%

Record high64° (1971)

Record low16° (2019)

Wed, 1846° / 33°

0.09

46 °

Grass Lake, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high46°

Average low33°

Average precipitation0.09 in

Chance of precipitation25%

Record high68° (2016)

Record low12° (2014)

Thu, 1946° / 33°

0.08

46 °

Grass Lake, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high46°

Average low33°

Average precipitation0.08 in

Chance of precipitation32%

Record high65° (1985)

Record low12° (2014)

Fri, 2045° / 33°

0.11

45 °

Grass Lake, Friday, 20 November

Climate normal for this date — 60-year average.

Average high45°

Average low33°

Average precipitation0.11 in

Chance of precipitation30%

Record high66° (1985)

Record low14° (2014)

Sat, 2143° / 32°

0.08

43 °

Grass Lake, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high43°

Average low32°

Average precipitation0.08 in

Chance of precipitation30%

Record high59° (1990)

Record low6° (2014)

Sun, 2243° / 30°

0.07

43 °

Grass Lake, Sunday, 22 November

Climate normal for this date — 60-year average.

Average high43°

Average low30°

Average precipitation0.07 in

Chance of precipitation22%

Record high62° (2010)

Record low15° (1964)

Mon, 2344° / 31°

0.09

44 °

Grass Lake, Monday, 23 November

Climate normal for this date — 60-year average.

Average high44°

Average low31°

Average precipitation0.09 in

Chance of precipitation27%

Record high65° (1999)

Record low14° (1972)

Tue, 2442° / 30°

0.09

42 °

Grass Lake, Tuesday, 24 November

Climate normal for this date — 60-year average.

Average high42°

Average low30°

Average precipitation0.09 in

Chance of precipitation33%

Record high61° (1999)

Record low13° (2005)

Wed, 2542° / 31°

0.11

42 °

Grass Lake, Wednesday, 25 November

Climate normal for this date — 60-year average.

Average high42°

Average low31°

Average precipitation0.11 in

Chance of precipitation37%

Record high59° (2001)

Record low15° (2005)

Thu, 2643° / 32°

0.09

43 °

Grass Lake, Thursday, 26 November

Climate normal for this date — 60-year average.

Average high43°

Average low32°

Average precipitation0.09 in

Chance of precipitation33%

Record high58° (1960)

Record low18° (1977)

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.