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First Lake, WI Weather Forecast

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First Lake, WI Weather Forecast

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First Lake WI weather - Overcast - 54°F
Overcast
54°F
Updated 12:31 am
Feels Like 47°F
Humidity 74%
Wind E 5 mph
Barometer  30.28 in
Dew Point 46°F
First Lake WI weather - Overcast - 12°C
Overcast
12°C
Updated 12:31 am
Feels Like 9°C
Humidity 74%
Wind E 8 km/h
Barometer  102.5 kPa
Dew Point 8°C
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First Lake Weather Forecast

OVERNIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY FRIDAY SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY
First Lake, WI Weather - Overnight Chance Of Showers First Lake, WI Weather - Tuesday Mostly Sunny First Lake, WI Weather - Tuesday Night Partly Cloudy First Lake, WI Weather - Wednesday Mostly Sunny First Lake, WI Weather - Wednesday Night Partly Cloudy First Lake, WI Weather - Thursday Mostly Cloudy First Lake, WI Weather - Friday Mostly Cloudy First Lake, WI Weather - Saturday Chance Of Showers First Lake, WI Weather - Saturday Night Chance Of Showers First Lake, WI Weather - Sunday Mostly Cloudy First Lake, WI Weather - Sunday Night Partly Cloudy First Lake, WI Weather - Monday Partly Sunny
Chance of Showers Mostly Sunny Partly Cloudy Mostly Sunny Partly Cloudy Mostly Cloudy Mostly Cloudy Chance of Showers Chance of Showers Mostly Cloudy Partly Cloudy Partly Sunny
Lo: 45°FLo: 7°C Hi: 61°FHi: 16°C
 Lo: 41°FLo: 5°C Hi: 65°FHi: 18°C
 Lo: 45°FLo: 7°C Hi: 65°FHi: 18°C
Lo: 49°FLo: 9°C		 Hi: 65°FHi: 18°C
Lo: 49°FLo: 9°C		 Hi: 65°FHi: 18°C
Lo: 51°FLo: 11°C		 Hi: 65°FHi: 18°C
Lo: 51°FLo: 11°C		 Hi: 69°FHi: 21°C
 Lo: 51°FLo: 11°C Hi: 69°FHi: 21°C
POP: 20% POP: 40% POP: 40%
POP = Probability of Precipitation.
Weather Outlook Updated: 1052 PM CDT Mon Sep 21 2026 First Lake, WI Weather - WeatherWorld.com

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Issued: 702 PM CDT Mon Sep 21 2026

Key Messages

  • Periods of light rain today southwest of I-94, focused mainly south of I-90. Overall impacts should be limited with rainfall amounts generally of 1/2" or less.
  • Cool and dry for much of the upcoming week with near to slightly below normal temperatures.
  • Next chance of widespread rain arrives over the weekend, but details of rainfall amounts and placement remain sparse.

Discussion

... Issued at 1200 PM CDT Mon Sep 21 2026

Today - Tonight: Periods of Light Rain

A stacked mid to upper troposp...