Weather in Grass Lake, MI
Grass Lake, Wednesday, 14 October, 08:40
Overcast. Feels like 57°. High 70°, low 57°.
Monthly outlook for Grass Lake, MI: average high 56.3°, average low 40.3°. That is 0.1° below the climate normal for October. Precipitation is expected on 4 days (about 2.0 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 14 October (69.5°), the coolest 23 October (29.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 14 October – 23 October | 60.3° | 57.5° | +1.5° |
| 24 October – 2 November | 49.8° | 54.5° | -2.6° |
| 3 November – 12 November | at normal | 49.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Chelsea (11 mi).
1.26
Grass Lake, Thursday, 15 October
Heavy rain. High 60°, low 54°.
0.24Grass Lake, Friday, 16 October
Rain. High 66°, low 47°.
0
Grass Lake, Saturday, 17 October
Clear. High 52°, low 37°.
0Grass Lake, Sunday, 18 October
Clear. High 59°, low 40°.
0Grass Lake, Monday, 19 October
Clear. High 62°, low 40°.
0
Grass Lake, Tuesday, 20 October
Partly cloudy. High 64°, low 47°.
0
Grass Lake, Wednesday, 21 October
Mostly clear. High 67°, low 48°.
0Grass Lake, Thursday, 22 October
Clear. High 55°, low 38°.
0Grass Lake, Friday, 23 October
Clear. High 48°, low 30°.
0Grass Lake, Saturday, 24 October
Partly cloudy. High 53°, low 32°.
0.07Grass Lake, Sunday, 25 October
Light rain. High 45°, low 39°.
0.01Grass Lake, Monday, 26 October
Light rain. High 48°, low 34°.
0Grass Lake, Tuesday, 27 October
Partly cloudy. High 51°, low 33°.
0Grass Lake, Wednesday, 28 October
Partly cloudy. High 51°, low 34°.
0Grass Lake, Thursday, 29 October
Mostly clear. High 50°, low 34°.
0.07Grass Lake, Friday, 30 October
Climate normal for this date — 60-year average.
0.11
Grass Lake, Saturday, 31 October
Climate normal for this date — 60-year average.
0.12Grass Lake, Sunday, 1 November
Climate normal for this date — 60-year average.
0.16Grass Lake, Monday, 2 November
Climate normal for this date — 60-year average.
0.08Grass Lake, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.06Grass Lake, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.07Grass Lake, Thursday, 5 November
Climate normal for this date — 60-year average.
0.06Grass Lake, Friday, 6 November
Climate normal for this date — 60-year average.
0.09Grass Lake, Saturday, 7 November
Climate normal for this date — 60-year average.
0.03Grass Lake, Sunday, 8 November
Climate normal for this date — 60-year average.
0.11Grass Lake, Monday, 9 November
Climate normal for this date — 60-year average.
0.12Grass Lake, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.1Grass Lake, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Grass Lake, Thursday, 12 November
Climate normal for this date — 60-year average.
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.
Sun and moon today
Weather history
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