As of 01:47 EDT

Weather in Grass Lake, MI

49°Current weather

Grass Lake, Thursday, 15 October, 01:47

Overcast. Feels like 48°. High 63°, low 49°.

Pressure30.21 inHg
Wind4.3 mph E
Humidity90%
Visibility6.2 mi
Dew point46°

Monthly outlook for Grass Lake, MI: average high 61.7°, average low 45.6°. That is 3.1° above the climate normal for October. Precipitation is expected on 5 days (about 3.9 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 23 October (73.8°), the coolest 17 October (36°).

61.7°/45.6°
Average high / low
+3.1°
Above normal
5 / 5
Wet days / normal
3.9 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
15 October – 24 October64.1°57.2°+3.8°
25 October – 3 November57.8°54°+2.1°
4 November – 13 Novemberat normal49°—

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).

Fri, 1667° / 46°0.54Heavy rain
67 °Heavy rain

Grass Lake, Friday, 16 October

Heavy rain. High 67°, low 46°.

Pressure29.83 inHg
Wind13.2 mph W
Humidity82%
Visibility6.2 mi
Dew point49°
Sat, 1752° / 36°0Clear
52 °Clear

Grass Lake, Saturday, 17 October

Clear. High 52°, low 36°.

Pressure30.47 inHg
Wind5.9 mph N
Humidity56%
Visibility6.2 mi
Dew point29°
Sun, 1860° / 41°0Clear
60 °Clear

Grass Lake, Sunday, 18 October

Clear. High 60°, low 41°.

Pressure30.50 inHg
Wind10.2 mph SW
Humidity54%
Visibility6.2 mi
Dew point38°
Mon, 1963° / 41°0Clear
63 °Clear

Grass Lake, Monday, 19 October

Clear. High 63°, low 41°.

Pressure30.39 inHg
Wind7 mph SW
Humidity43%
Visibility—
Dew point37°
Tue, 2065° / 41°0Partly cloudy
65 °Partly cloudy

Grass Lake, Tuesday, 20 October

Partly cloudy. High 65°, low 41°.

Pressure30.36 inHg
Wind3.8 mph E
Humidity45%
Visibility—
Dew point39°
Wed, 2167° / 48°0Overcast
67 °Overcast

Grass Lake, Wednesday, 21 October

Overcast. High 67°, low 48°.

Pressure30.39 inHg
Wind6.9 mph SE
Humidity37%
Visibility—
Dew point37°
Thu, 2267° / 48°0Overcast
67 °Overcast

Grass Lake, Thursday, 22 October

Overcast. High 67°, low 48°.

Pressure30.30 inHg
Wind6.6 mph SE
Humidity44%
Visibility—
Dew point42°
Fri, 2374° / 52°0Overcast
74 °Overcast

Grass Lake, Friday, 23 October

Overcast. High 74°, low 52°.

Pressure30.15 inHg
Wind13.2 mph S
Humidity47%
Visibility—
Dew point49°
Sat, 2464° / 59°0.41Rain
64 °Rain

Grass Lake, Saturday, 24 October

Rain. High 64°, low 59°.

Pressure30.24 inHg
Wind10.4 mph S
Humidity94%
Visibility—
Dew point58°
Sun, 2562° / 58°1.46Rain
62 °Rain

Grass Lake, Sunday, 25 October

Rain. High 62°, low 58°.

Pressure30.12 inHg
Wind8.1 mph N
Humidity97%
Visibility—
Dew point60°
Mon, 2659° / 43°1.37Heavy rain
59 °Heavy rain

Grass Lake, Monday, 26 October

Heavy rain. High 59°, low 43°.

Pressure29.88 inHg
Wind21.6 mph NW
Humidity91%
Visibility—
Dew point47°
Tue, 2756° / 41°0Partly cloudy
56 °Partly cloudy

Grass Lake, Tuesday, 27 October

Partly cloudy. High 56°, low 41°.

Pressure30.15 inHg
Wind6.5 mph SW
Humidity52%
Visibility—
Dew point37°
Wed, 2856° / 45°0Overcast
56 °Overcast

Grass Lake, Wednesday, 28 October

Overcast. High 56°, low 45°.

Pressure29.91 inHg
Wind7.5 mph E
Humidity58%
Visibility—
Dew point39°
Thu, 2960° / 42°0Clear
60 °Clear

Grass Lake, Thursday, 29 October

Clear. High 60°, low 42°.

Pressure29.85 inHg
Wind15 mph W
Humidity54%
Visibility—
Dew point41°
Fri, 3054° / 40°0Clear
54 °Clear

Grass Lake, Friday, 30 October

Clear. High 54°, low 40°.

Pressure30.15 inHg
Wind6.3 mph W
Humidity42%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3155° / 42°0.11Climate normal
55 °Climate normal

Grass Lake, 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°0.12Climate normal
54 °Climate normal

Grass Lake, 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°0.16Climate 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)

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.