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Grantsburg Weather Warning NWS WEATHER ALERT FOR THE GRANTSBURG, WI AREA - Issued: 329 AM CDT Mon Sep 14 2026 Grantsburg Weather Warning

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54840 Weather (Grantsburg, WI)

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Overcast at Grantsburg (54840), temperature is 57°F14°C, dew point 47°F8°C, humidity 68%. Wind direction is SSE at 9 mphat 14 km/h with visibility of 10 mi16 km. Barometric pressure is 30.14 in1020 mb. Last update: 10:45 am.*
*Time is approximately 10:45 am Mon, Sep 14, 2026. Time will be within 15 minutes of current local time. Grantsburg weather forecast data is updated every 15 minutes.

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The weather may wither whether you hurry or dither, be you run like the wind or just freeze up and shiver. ―Guy Lawrence
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Grantsburg WI Weather - 11:45 am

Grantsburg Weather Forecast

Weather forecast for: Grantsburg WI
Last Update: 10:31 am CDT Sep 14, 2026
Today: A chance of showers, then showers and possibly a thunderstorm after 1pm. High near 64. Breezy, with a southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tonight: Showers and possibly a thunderstorm before 11pm, then a chance of showers between 11pm and midnight. Low around 52. Breezy, with a southwest wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday: Sunny, with a high near 68. Breezy, with a west wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night: Mostly clear, with a low around 43. West wind around 5 mph becoming calm in the evening.
Wednesday: Partly sunny, with a high near 68. Calm wind becoming southeast around 5 mph in the afternoon.
Wednesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 47. East wind around 5 mph becoming calm.
Thursday: Partly sunny, with a high near 74. Calm wind becoming east around 5 mph.
Thursday Night: A chance of showers after 1am. Partly cloudy, with a low around 49. Calm wind.
Friday: A chance of showers. Mostly cloudy, with a high near 71. Calm wind becoming southeast around 5 mph in the morning. Winds could gust as high as 15 mph.
Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 50. East wind around 5 mph.
Saturday: A slight chance of showers. Mostly cloudy, with a high near 71. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night: A slight chance of showers. Mostly cloudy, with a low around 47. Northeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.
Sunday: A slight chance of showers. Partly sunny, with a high near 71. Calm wind becoming east around 5 mph in the morning.

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