Weather in Grass Lake, MI
Grass Lake, Wednesday, 14 October, 11:55
Overcast. Feels like 59°. High 68°, low 57°.
Monthly outlook for Grass Lake, MI: average high 61.2°, average low 45.2°. That is 2.6° above the climate normal for October. Precipitation is expected on 6 days (about 2.8 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 24 October (73.2°), the coolest 26 October (36.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 14 October – 23 October | 62.3° | 57.5° | +2.6° |
| 24 October – 2 November | 59.2° | 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).
0.62
Grass Lake, Thursday, 15 October
Rain. High 64°, low 53°.
0.62Grass Lake, Friday, 16 October
Heavy rain. High 68°, low 47°.
0
Grass Lake, Saturday, 17 October
Clear. High 51°, low 37°.
0Grass Lake, Sunday, 18 October
Clear. High 59°, low 40°.
0Grass Lake, Monday, 19 October
Clear. High 62°, low 40°.
0Grass Lake, Tuesday, 20 October
Overcast. High 67°, low 47°.
0Grass Lake, Wednesday, 21 October
Clear. High 69°, low 50°.
0.48Grass Lake, Thursday, 22 October
Rain. High 60°, low 46°.
0
Grass Lake, Friday, 23 October
Partly cloudy. High 55°, low 39°.
0.06Grass Lake, Saturday, 24 October
Light rain. High 73°, low 51°.
0.01Grass Lake, Sunday, 25 October
Light rain. High 52°, low 41°.
0Grass Lake, Monday, 26 October
Overcast. High 56°, low 37°.
0Grass Lake, Tuesday, 27 October
Clear. High 61°, low 42°.
0Grass Lake, Wednesday, 28 October
Light rain. High 57°, low 49°.
0.57Grass Lake, Thursday, 29 October
Rain. High 55°, low 48°.
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.
0.03
Grass 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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