As of 06:04 EDT

Weather in Grass Lake, MI

43°

Grass Lake, Sunday, 25 October, 06:04

Mostly clear. Feels like 40°. High 69°, low 42°.

Pressure30.45 inHg

Wind4.2 mph S

Humidity94%

Visibility6.2 mi

Dew point41°

See detailed hourly forecast

Monthly outlook for Grass Lake, MI: average high 61.4°, average low 47.9°. That is 4.8° above the climate normal for October. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 5 days and 1.3 inches. The warmest day looks like 29 October (69.3°), the coolest 6 November (39.7°).

61.4°/47.9°

Average high / low

+4.8°

Above normal

2 / 5

Wet days / normal

0.3 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
25 October – 3 November	66.5°	54°	+6.9°
4 November – 13 November	53°	49°	+2.2°
14 November – 23 November	at normal	44.7°	—

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).

Mon, 2668° / 43°

68 °

Grass Lake, Monday, 26 October

Overcast. High 68°, low 43°.

Pressure30.33 inHg

Wind3.6 mph NW

Humidity65%

Visibility6.2 mi

Dew point49°

Tue, 2759° / 48°

59 °

Grass Lake, Tuesday, 27 October

Overcast. High 59°, low 48°.

Pressure30.39 inHg

Wind6.8 mph E

Humidity59%

Visibility6.2 mi

Dew point40°

Wed, 2868° / 49°

68 °

Grass Lake, Wednesday, 28 October

Light rain. High 68°, low 49°.

Pressure30.30 inHg

Wind5.7 mph S

Humidity70%

Visibility6.2 mi

Dew point52°

Thu, 2969° / 53°

0.05

69 °

Grass Lake, Thursday, 29 October

Light rain. High 69°, low 53°.

Pressure30.12 inHg

Wind12.5 mph W

Humidity55%

Visibility—

Dew point50°

Fri, 3066° / 54°

0.01

66 °

Grass Lake, Friday, 30 October

Light rain. High 66°, low 54°.

Pressure30.18 inHg

Wind9.8 mph SE

Humidity50%

Visibility—

Dew point45°

Sat, 3167° / 54°

67 °

Grass Lake, Saturday, 31 October

Overcast. High 67°, low 54°.

Pressure30.18 inHg

Wind9.7 mph SE

Humidity52%

Visibility—

Dew point47°

Sun, 0162° / 55°

62 °

Grass Lake, Sunday, 1 November

Overcast. High 62°, low 55°.

Pressure30.18 inHg

Wind7.6 mph S

Humidity56%

Visibility—

Dew point46°

Mon, 0268° / 59°

0.02

68 °

Grass Lake, Monday, 2 November

Light rain. High 68°, low 59°.

Pressure29.97 inHg

Wind17.9 mph S

Humidity69%

Visibility—

Dew point55°

Tue, 0368° / 56°

0.23

68 °

Grass Lake, Tuesday, 3 November

Rain. High 68°, low 56°.

Pressure29.65 inHg

Wind20.3 mph S

Humidity73%

Visibility—

Dew point58°

Wed, 0453° / 46°

53 °

Grass Lake, Wednesday, 4 November

Overcast. High 53°, low 46°.

Pressure29.71 inHg

Wind15.1 mph SW

Humidity64%

Visibility—

Dew point40°

Thu, 0550° / 41°

50 °

Grass Lake, Thursday, 5 November

Overcast. High 50°, low 41°.

Pressure29.85 inHg

Wind11.7 mph W

Humidity72%

Visibility—

Dew point40°

Fri, 0657° / 40°

57 °

Grass Lake, Friday, 6 November

Clear. High 57°, low 40°.

Pressure29.80 inHg

Wind12.1 mph W

Humidity48%

Visibility—

Dew point35°

Sat, 0754° / 43°

54 °

Grass Lake, Saturday, 7 November

Overcast. High 54°, low 43°.

Pressure29.50 inHg

Wind22.1 mph W

Humidity56%

Visibility—

Dew point33°

Sun, 0852° / 43°

52 °

Grass Lake, Sunday, 8 November

Overcast. High 52°, low 43°.

Pressure29.94 inHg

Wind17.3 mph NW

Humidity57%

Visibility—

Dew point35°

Mon, 0952° / 41°

0.01

52 °

Grass Lake, Monday, 9 November

Light rain. High 52°, low 41°.

Pressure29.91 inHg

Wind21.7 mph SE

Humidity61%

Visibility—

Dew point37°

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

Tue, 1049° / 37°

0.12

49 °

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°

0.1

47 °

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°

0.06

45 °

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°

0.05

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)

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.