10-day forecast for St. Clair, MI: 52° to 90°, with precipitation expected on 5 days. The table below breaks each day into morning, afternoon, evening and overnight.
90°
Best day: Sunday, August 9
87° · 0.81 in
Worst day: Monday, August 10
Tap any day below to see morning, afternoon, evening and overnight.
Sun, 0990° / 67°0.04
Morning68°feels 69°
Afternoon86°feels 85°
Evening79°feels 79°
Overnight68°feels 69°
90 °
St. Clair, Sunday, 9 August
Light rain. High 90°, low 67°.
Pressure30.00 inHg
Wind11.5 mph S
Humidity42%
Visibility6.2 mi
Dew point56°
Mon, 1087° / 69°0.81
Morning70°feels 71°
Afternoon80°feels 84°
Evening75°feels 77°
Overnight71°feels 72°
87 °
St. Clair, Monday, 10 August
Heavy rain. High 87°, low 69°.
Pressure29.91 inHg
Wind10.6 mph SW
Humidity80%
Visibility6.2 mi
Dew point70°
Tue, 1178° / 64°0.44
Morning69°feels 70°
Afternoon78°feels 80°
Evening67°feels 68°
Overnight68°feels 69°
78 °
St. Clair, Tuesday, 11 August
Rain. High 78°, low 64°.
Pressure29.85 inHg
Wind7.9 mph S
Humidity88%
Visibility6.2 mi
Dew point70°
Wed, 1283° / 63°0.01
Morning65°feels 65°
Afternoon82°feels 83°
Evening70°feels 70°
Overnight64°feels 65°
83 °
St. Clair, Wednesday, 12 August
Light rain. High 83°, low 63°.
Pressure29.80 inHg
Wind5.1 mph NW
Humidity60%
Visibility6.2 mi
Dew point63°
Thu, 1371° / 56°0.2
Morning61°feels 61°
Afternoon70°feels 69°
Evening61°feels 60°
Overnight56°feels 55°
71 °
St. Clair, Thursday, 13 August
Rain. High 71°, low 56°.
Pressure29.91 inHg
Wind12.8 mph N
Humidity54%
Visibility—
Dew point52°
Fri, 1470° / 53°0
Morning60°feels 59°
Afternoon69°feels 68°
Evening61°feels 60°
Overnight55°feels 54°
70 °
St. Clair, Friday, 14 August
Mostly clear. High 70°, low 53°.
Pressure30.09 inHg
Wind12.4 mph N
Humidity47%
Visibility—
Dew point47°
Sat, 1576° / 52°0
Morning62°feels 61°
Afternoon73°feels 72°
Evening65°feels 65°
Overnight59°feels 58°
76 °
St. Clair, Saturday, 15 August
Overcast. High 76°, low 52°.
Pressure30.30 inHg
Wind7 mph SW
Humidity40%
Visibility—
Dew point46°
Sun, 1677° / 56°0
Morning66°feels 65°
Afternoon75°feels 75°
Evening66°feels 65°
Overnight61°feels 61°
77 °
St. Clair, Sunday, 16 August
Partly cloudy. High 77°, low 56°.
Pressure30.24 inHg
Wind12.7 mph S
Humidity47%
Visibility—
Dew point53°
Mon, 1783° / 60°0
Morning69°feels 69°
Afternoon80°feels 80°
Evening73°feels 74°
Overnight68°feels 68°
83 °
St. Clair, Monday, 17 August
Overcast. High 83°, low 60°.
Pressure30.03 inHg
Wind11.9 mph S
Humidity47%
Visibility—
Dew point56°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in St. Clair, MI around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.