What is today's weather forecast for Thunder Bay Island, MI?

Today's forecast for Thunder Bay Island shows a high of 45 degrees and a low of 21 degrees Fahrenheit. Showers, mainly after 7am.

What is the 7-day weather forecast for Thunder Bay Island, MI?

The 7-day forecast for Thunder Bay Island shows highs from 25 to 45 degrees and lows from 21 to 28 degrees Fahrenheit. Expect precipitation on 4 days with chances of 20% or higher.

Will it rain in Thunder Bay Island, MI this week?

Yes, rain is possible in Thunder Bay Island this week. Precipitation chances: Thursday (80% chance), Friday (30% chance), Saturday (60% chance), Monday (50% chance).

How accurate is the Thunder Bay Island weather forecast?

WeatherForYou provides highly accurate Thunder Bay Island forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Thunder Bay Island, MI Weather Forecast and Current Conditions

Current Conditions From Nearby Station

Switch to Metric Units

34°F
Feels Like 25°F

Humidity N/A Dew Point N/A Wind S 14 MPH Gusts 19 Barometer 29.78 in.

Report from a MADIS/MESONET weather station 11.3 mi. W of central Thunder Bay Island
at 3:42 AM Thu, Dec 18, 2025

Point Forecast at a Glance

ThuDec 18

80%

FriDec 19

30%

SatDec 20

60%

SunDec 21

MonDec 22

TueDec 23

WedDec 24

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

High temperatures drop from 45°F to a low of 25°F, then recover to 32°F by week's end. Unsettled weather expected with snow likely on at least 4 days.

Climate Context

This week's forecast shows temperatures running 1°F above the historical average for December. Normal highs for this period are around 33°F with lows around 20°F.

This Date in Weather History

1957 - A tornado swept across Jackson County, Williamson County and Franklin County in southern Illinois killing eleven persons.

Thunder Bay Island, MI 7 Day Weather Forecast Details

Thursday Dec 18

Day: Showers, mainly after 7am. High near 45. Windy, with a south wind around 30 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

Night: Rain showers before 2am, then a chance of snow showers. Low around 21. Windy, with a southwest wind 25 to 30 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

Friday Dec 19

Day: A 30 percent chance of snow showers, mainly before 1pm. Mostly cloudy, with a temperature falling to around 21 by 2pm. Windy, with a northwest wind 30 to 35 mph, with gusts as high as 40 mph.

Night: A 20 percent chance of snow showers after 1am. Mostly cloudy, with a low around 21. Windy, with a northwest wind 25 to 30 mph becoming west 15 to 20 mph after midnight.

Saturday Dec 20

Day: Snow showers likely, mainly before 1pm. Cloudy, with a high near 34. Breezy, with a south wind 20 to 25 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

Night: Mostly cloudy, with a low around 21. Windy.

Sunday Dec 21

Day: Mostly cloudy, with a high near 25. Windy.

Night: Mostly cloudy, with a low around 21. Blustery.

Monday Dec 22

Day: Mostly cloudy, with a high near 31.

Night: A chance of snow showers. Cloudy, with a low around 28. Breezy.

Tuesday Dec 23

Day: Mostly cloudy, with a high near 36. Breezy.

Night: Mostly cloudy, with a low around 27. Breezy.

Wednesday Dec 24

Day: Mostly cloudy, with a high near 32.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

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