Weather Alert
First Sister Lake Weather Warning NWS WEATHER ALERT FOR THE FIRST SISTER LAKE, MI AREA - Issued: 420 AM EDT Mon Aug 31 2026 First Sister Lake Weather Warning

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First Sister Lake, MI Weather Forecast

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First Sister Lake, MI Weather Forecast

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First Sister Lake MI weather - Partly Cloudy - 73°F
Partly Cloudy
73°F
Updated 9:46 am
Feels Like 72°F
Humidity 84%
Wind SW 7 mph
Barometer  30.04 in
Dew Point 68°F
First Sister Lake MI weather - Partly Cloudy - 23°C
Partly Cloudy
23°C
Updated 9:46 am
Feels Like 22°C
Humidity 84%
Wind SW 11 km/h
Barometer  101.7 kPa
Dew Point 20°C
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First Sister Lake Weather Forecast

REST OF TODAY TONIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT
First Sister Lake, MI Weather - Rest Of Today Chance Of T-Storm First Sister Lake, MI Weather - Tonight Partly Cloudy First Sister Lake, MI Weather - Tuesday Mostly Sunny First Sister Lake, MI Weather - Tuesday Night Partly Cloudy First Sister Lake, MI Weather - Wednesday Partly Cloudy First Sister Lake, MI Weather - Wednesday Night Chance Of T-Storm First Sister Lake, MI Weather - Thursday Chance Of Showers First Sister Lake, MI Weather - Thursday Night Partly Cloudy First Sister Lake, MI Weather - Friday Partly Cloudy First Sister Lake, MI Weather - Friday Night Clearing First Sister Lake, MI Weather - Saturday Mostly Sunny First Sister Lake, MI Weather - Saturday Night Mostly Clear
Chance of T-Storm Partly Cloudy Mostly Sunny Partly Cloudy Partly Cloudy Chance of T-Storm Chance of Showers Partly Cloudy Partly Cloudy Clearing Mostly Sunny Mostly Clear
Hi: 85°FHi: 29°C
 Lo: 71°FLo: 22°C Hi: 90°FHi: 32°C
 Lo: 71°FLo: 22°C Hi: 91°FHi: 33°C
 Lo: 70°FLo: 21°C Hi: 85°FHi: 29°C
 Lo: 65°FLo: 18°C Hi: 81°FHi: 27°C
 Lo: 61°FLo: 16°C Hi: 81°FHi: 27°C
 Lo: 60°FLo: 16°C
POP: 50% POP: 60% POP: 30%
POP = Probability of Precipitation.
Weather Outlook Updated: 830 AM EDT Mon Aug 31 2026 First Sister Lake, MI Weather - WeatherWorld.com

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Issued: 430 AM EDT Mon Aug 31 2026

Key Messages

  • Periodic chances for showers and thunderstorms continue through much of the week. Tuesday carries a Marginal Risk for severe weather with Wednesday evening carrying a Marginal to Slight Risk.
  • Warm and humid conditions develop through mid-week. Daily peak temperatures will depend on cloud cover and precipitation.

Aviation

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Any rain chances for this morning and afternoon will be derived from the activity ongoing across eastern Wisconsin into Lake Michigan. Activity is not as robust as ...