Weather in Saint Clair Haven, MI
Saint Clair Haven, Sunday, 9 August, 02:12
Clear. Feels like 71°. High 87°, low 69°.
Monthly outlook for Saint Clair Haven, MI: average high 78.2°, average low 64.9°. That is 0.4° above the climate normal for August. Precipitation is expected on 3 days (about 1.2 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 9 August (86.7°), the coolest 21 August (58.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 78.8° | 78° | +0.5° |
| 19 August – 28 August | 77° | 77° | -0° |
| 29 August – 7 September | at normal | 75.7° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Algonac (13 mi).
0.32
Saint Clair Haven, Monday, 10 August
Rain. High 87°, low 72°.
0.74Saint Clair Haven, Tuesday, 11 August
Heavy rain. High 77°, low 70°.
0.02Saint Clair Haven, Wednesday, 12 August
Light rain. High 82°, low 65°.
0
Saint Clair Haven, Thursday, 13 August
Overcast. High 73°, low 59°.
0
Saint Clair Haven, Friday, 14 August
Clear. High 77°, low 62°.
0Saint Clair Haven, Saturday, 15 August
Overcast. High 74°, low 62°.
0Saint Clair Haven, Sunday, 16 August
Overcast. High 76°, low 65°.
0Saint Clair Haven, Monday, 17 August
Overcast. High 76°, low 68°.
0
Saint Clair Haven, Tuesday, 18 August
Mostly clear. High 80°, low 70°.
0.07Saint Clair Haven, Wednesday, 19 August
Light rain. High 75°, low 66°.
0.01Saint Clair Haven, Thursday, 20 August
Light rain. High 76°, low 63°.
0Saint Clair Haven, Friday, 21 August
Overcast. High 73°, low 58°.
0Saint Clair Haven, Saturday, 22 August
Overcast. High 74°, low 59°.
0.01Saint Clair Haven, Sunday, 23 August
Light rain. High 86°, low 68°.
0
Saint Clair Haven, Monday, 24 August
Partly cloudy. High 78°, low 63°.
0.08Saint Clair Haven, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.12
Saint Clair Haven, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.13Saint Clair Haven, Thursday, 27 August
Climate normal for this date — 60-year average.
0.15Saint Clair Haven, Friday, 28 August
Climate normal for this date — 60-year average.
0.11Saint Clair Haven, Saturday, 29 August
Climate normal for this date — 60-year average.
0.08Saint Clair Haven, Sunday, 30 August
Climate normal for this date — 60-year average.
0.07Saint Clair Haven, Monday, 31 August
Climate normal for this date — 60-year average.
0.07Saint Clair Haven, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.07Saint Clair Haven, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09Saint Clair Haven, Thursday, 3 September
Climate normal for this date — 60-year average.
0.1Saint Clair Haven, Friday, 4 September
Climate normal for this date — 60-year average.
0.04Saint Clair Haven, Saturday, 5 September
Climate normal for this date — 60-year average.
0.06Saint Clair Haven, Sunday, 6 September
Climate normal for this date — 60-year average.
0.11Saint Clair Haven, Monday, 7 September
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 Saint Clair Haven, 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 Saint Clair Haven, 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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