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St. Johns, MI Weather Forecast

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St. Johns, MI Weather Forecast

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St. Johns MI weather - Clear - 42°F
Clear
42°F
Updated 1:57 am
Feels Like 34°F
Humidity 67%
Wind SSW 9 mph
Barometer  30.43 in
Dew Point 32°F
St. Johns MI weather - Clear - 6°C
Clear
6°C
Updated 1:57 am
Feels Like 1°C
Humidity 67%
Wind SSW 14 km/h
Barometer  103 kPa
Dew Point 0°C
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St. Johns Weather Forecast

TONIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY
St. Johns, MI Weather - Tonight Clear St. Johns, MI Weather - Sunday Sunny St. Johns, MI Weather - Sunday Night Clear St. Johns, MI Weather - Monday Sunny St. Johns, MI Weather - Monday Night Mostly Clear St. Johns, MI Weather - Tuesday Sunny St. Johns, MI Weather - Tuesday Night Mostly Clear St. Johns, MI Weather - Wednesday Sunny St. Johns, MI Weather - Wednesday Night Mostly Clear St. Johns, MI Weather - Thursday Mostly Sunny St. Johns, MI Weather - Thursday Night Mostly Clear St. Johns, MI Weather - Friday Mostly Sunny
Clear Sunny Clear Sunny Mostly Clear Sunny Mostly Clear Sunny Mostly Clear Mostly Sunny Mostly Clear Mostly Sunny
Lo: 35°FLo: 2°C Hi: 60°FHi: 16°C
 Lo: 39°FLo: 4°C Hi: 65°FHi: 18°C
 Lo: 39°FLo: 4°C Hi: 69°FHi: 21°C
 Lo: 39°FLo: 4°C Hi: 69°FHi: 21°C
 Lo: 41°FLo: 5°C Hi: 69°FHi: 21°C
 Lo: 41°FLo: 5°C Hi: 65°FHi: 18°C
POP = Probability of Precipitation.
Weather Outlook Updated: 832 PM EDT Sat Oct 17 2026 St. Johns, MI Weather - WeatherWorld.com

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St. Johns Forecast Discussion

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Issued: 659 PM EDT Sat Oct 17 2026

Key Messages

  • Areas of frost tonight
  • Warming trend with fair weather

Discussion

... Issued at 153 PM EDT Sat Oct 17 2026
  • Areas of frost tonight

    • Saturday morning temperatures away from Lake Michigan were right around 32 degrees, plus or minus a few degrees locally, with areas of frost as expected. A more marginal setup for frost is expected tonight, mostly in southern Michigan. As the surface high pressure ridge migrates southeast of Michigan tonight, low-level southwest flow will increase to 15-25 kn...