Park climate1991–2020 climate normals186 m source elevationNASA POWER

Long-term atmospheric patterns including temperature, precipitation, and wind speeds

Monthly Climate Normals for Thunder Bay National Marine Sanctuary and Underwater Preserve in Michigan

Name: Thunder Bay National Marine Sanctuary and Underwater Preserve monthly climate normals
Creator: NASA POWER

Examine the twelve-month climate profile of Thunder Bay National Marine Sanctuary and Underwater Preserve based on NASA POWER measurements from 1991 to 2020. This data details average monthly temperature, precipitation rates, relative humidity, wind speed, and daylight hours at a single representative coordinate. These statistics provide a standardized view of historical climatic trends rather than current weather observations or localized variations across the marine protected area.

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A flat-style digital illustration showing a calm, grassy wetland area with slender trees including birch, surrounded by foliage during a soft sunset or sunrise.

Annual climate pattern

Long-term monthly temperature averages and daily precipitation rates across twelve months

Thunder Bay National Marine Sanctuary and Underwater Preserve Annual Temperature and Precipitation Climate Normals

Average monthly temperatures span from sub-zero winter minimums to warm summer peaks across the annual cycle at Thunder Bay National Marine Sanctuary and Underwater Preserve. Average daily precipitation rates accompany these monthly thermal shifts according to NASA POWER records compiled for a representative coordinate.

Mean temperatureAverage minimum–maximum rangePrecipitation

Annual mean: 7 °C
Warmest month: August
Coolest month: February
Wettest month: August

Twelve-month climate

Twelve Month Climatology of Temperatures, Precipitation, Humidity, Wind, and Daylight

Thunder Bay National Marine Sanctuary and Underwater Preserve Monthly Climate Comparison

Examine twelve months of average temperature bounds, daily precipitation rates, and atmospheric humidity across the calendar year. Compare long-term climate normals and calculated daylight hours to understand annual meteorological patterns at a representative park coordinate.

	Mean temperature	Precipitation	Humidity	Wind speed	Daylight
January	-3.7 °C-12.1° to 4.5°	1.4 mm/day	88.5%	7.5 m/s	9 hours
February	-4.1 °C-13° to 4.3°	1.3 mm/day	86.8%	7.1 m/s	10.2 hours
March	-1 °C-10.6° to 8.7°	1.4 mm/day	82.7%	6.4 m/s	11.7 hours
April	3.4 °C-3.1° to 13.1°	2.5 mm/day	80.8%	6 m/s	13.3 hours
May	7.8 °C2° to 17.6°	2.3 mm/day	83.6%	4.9 m/s	14.7 hours
June	13 °C6.1° to 22.1°	2.4 mm/day	84.7%	4.3 m/s	15.4 hours
July	18.5 °C12.4° to 25.2°	2.4 mm/day	81.3%	4.3 m/s	15 hours
August	19.5 °C14.5° to 25.7°	2.5 mm/day	79%	4.8 m/s	13.8 hours
September	16.3 °C9° to 23.8°	2.3 mm/day	77.8%	5.6 m/s	12.3 hours
October	10.1 °C3.5° to 19.1°	2.4 mm/day	79.1%	6.6 m/s	10.7 hours
November	4.4 °C-2.5° to 12.4°	1.8 mm/day	81.1%	7.2 m/s	9.3 hours
December	-0.3 °C-8.4° to 7.1°	1.5 mm/day	85.1%	7.4 m/s	8.6 hours

Compare two months

See two months side by side and how much they differ. Both use the same 1991–2020 climate normals and NASA POWER data point as the table above, so they show typical conditions, not a forecast.

First month

Second month

Mean temperature: February: -4.1 °C; August: 19.5 °C; Change from February to August: +23.6 °C
Precipitation: February: 1.3 mm/day; August: 2.5 mm/day; Change from February to August: +1.2 mm/day
Daylight: February: 10.2 hours; August: 13.8 hours; Change from February to August: +3.7 hours

Calculated climate highlights

Comparing twelve stored monthly normals for temperature, precipitation, humidity, wind, and daylight duration

Calculated Monthly Climate Highlights and Extremes for Thunder Bay National Marine Sanctuary and Underwater Preserve

Calculated monthly comparisons highlight the warmest, coolest, wettest, driest, and windiest periods derived from long-term averages at a single coordinate. These metrics summarize seasonal patterns across twelve recorded normals rather than reflecting sudden weather events or site-wide extremes.

Warmest month: August19.5 °C
Coolest month: February-4.1 °C
Wettest month: August2.5 mm/day
Driest month: February1.3 mm/day
Most humid month: January88.5%
Windiest month: January7.5 m/s
Longest daylight: June15.4 hours

Interactive climate map

National park climate map

Open the climate map to compare monthly temperature, precipitation, and other averages.

Global National Park Climate Map

Other park climates

Explore monthly temperature, precipitation, and regional atmospheric normals across diverse conservation landscapes

Comparing Thunder Bay National Marine Sanctuary and Underwater Preserve Climate With Other Protected Area Profiles

Examine long-term monthly normals for temperature and precipitation alongside humidity, wind, and daylight metrics across varied protected areas. Standardized records allow readers to analyze atmospheric variation and geographic contrast beyond Thunder Bay National Marine Sanctuary and Underwater Preserve.