10-day forecast for St. Johns, MI: 50° to 87°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
86°
Best day: Tuesday, August 18
87° · 0.23 in
Worst day: Monday, August 10
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1087° / 70°0.23
Morning71°feels 73°
Afternoon82°feels 85°
Evening80°feels 82°
Overnight72°feels 73°
87 °
St. Johns, Monday, 10 August
Rain. High 87°, low 70°.
Pressure29.88 inHg
Wind7.2 mph W
Humidity84%
Visibility6.2 mi
Dew point70°
Tue, 1184° / 62°0.17
Morning65°feels 65°
Afternoon72°feels 73°
Evening69°feels 69°
Overnight65°feels 64°
84 °
St. Johns, Tuesday, 11 August
Rain. High 84°, low 62°.
Pressure29.88 inHg
Wind7 mph SE
Humidity42%
Visibility6.2 mi
Dew point58°
Wed, 1284° / 63°0
Morning65°feels 66°
Afternoon84°feels 85°
Evening76°feels 76°
Overnight64°feels 65°
84 °
St. Johns, Wednesday, 12 August
Clear. High 84°, low 63°.
Pressure29.77 inHg
Wind7.5 mph NW
Humidity59%
Visibility6.2 mi
Dew point64°
Thu, 1376° / 57°0
Morning61°feels 60°
Afternoon72°feels 71°
Evening66°feels 64°
Overnight62°feels 61°
76 °
St. Johns, Thursday, 13 August
Partly cloudy. High 76°, low 57°.
Pressure30.00 inHg
Wind10.9 mph N
Humidity37%
Visibility—
Dew point43°
Fri, 1476° / 50°0
Morning59°feels 58°
Afternoon73°feels 72°
Evening67°feels 66°
Overnight57°feels 56°
76 °
St. Johns, Friday, 14 August
Clear. High 76°, low 50°.
Pressure30.15 inHg
Wind11.4 mph NE
Humidity35%
Visibility—
Dew point42°
Sat, 1578° / 50°0
Morning60°feels 59°
Afternoon75°feels 74°
Evening69°feels 67°
Overnight60°feels 58°
78 °
St. Johns, Saturday, 15 August
Overcast. High 78°, low 50°.
Pressure30.27 inHg
Wind7 mph E
Humidity35%
Visibility—
Dew point43°
Sun, 1679° / 62°0
Morning67°feels 65°
Afternoon76°feels 75°
Evening73°feels 73°
Overnight68°feels 68°
79 °
St. Johns, Sunday, 16 August
Overcast. High 79°, low 62°.
Pressure30.09 inHg
Wind8 mph NW
Humidity32%
Visibility—
Dew point43°
Mon, 1785° / 62°0
Morning67°feels 67°
Afternoon81°feels 80°
Evening75°feels 75°
Overnight63°feels 63°
85 °
St. Johns, Monday, 17 August
Partly cloudy. High 85°, low 62°.
Pressure30.03 inHg
Wind11.6 mph NE
Humidity36%
Visibility—
Dew point50°
Tue, 1886° / 57°0
Morning66°feels 66°
Afternoon82°feels 82°
Evening77°feels 77°
Overnight65°feels 65°
86 °
St. Johns, Tuesday, 18 August
Overcast. High 86°, low 57°.
Pressure30.03 inHg
Wind7.8 mph SW
Humidity37%
Visibility—
Dew point51°
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. Johns, 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.