Park climate1991–2020 climate normals216 m source elevationNASA POWER

Review year-round patterns in temperature, precipitation, humidity, and daylight hours

Indiana Dunes National Park: monthly climate

Name: Indiana Dunes National Park monthly climate normals
Creator: NASA POWER

At the representative location for Indiana Dunes National Park, monthly mean temperatures range from -4 to 22.9 °C (1991–2020). Compare precipitation, humidity, wind, and daylight for each month.

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Annual climate pattern

Comparing long term average temperatures and daily precipitation rates across a twelve month cycle

Indiana Dunes National Park Monthly Climate Patterns and Temperature Normals

Based on climatology from 1991 through 2020, Indiana Dunes National Park exhibits a distinct thermal cycle where average monthly means rise from -4.03 degrees Celsius in January to 22.85 degrees Celsius in July. Daily precipitation rates trend higher alongside warming, averaging 3.56 millimeters per day in June while dropping to winter lows under two millimeters per day.

Mean temperatureAverage minimum–maximum rangePrecipitation

Annual mean: 9.8 °C
Warmest month: July
Coolest month: January
Wettest month: June

Twelve-month climate

Compare average temperature bounds, daily precipitation rates, and calculated daylight across the year

Indiana Dunes National Park Weather by Month: Twelve-Month Climatology Comparison

Analyzing monthly climate records over a thirty year span at a representative park coordinate reveals the long term environmental shifts within Indiana Dunes National Park. Evaluating the complete annual cycle of average temperature bounds, daily precipitation rates, relative humidity, wind speed, and calculated daylight hours clarifies subtle changes that singular yearly averages conceal.

	Mean temperature	Precipitation	Humidity	Wind speed	Daylight
January	-4 °C-17.7° to 10°	1.9 mm/day	87.5%	5.8 m/s	9.4 hours
February	-2.4 °C-15.3° to 12.6°	1.8 mm/day	84.8%	5.6 m/s	10.4 hours
March	2.7 °C-10.1° to 18.9°	2 mm/day	80.8%	5.4 m/s	11.7 hours
April	8.6 °C-3° to 23.3°	3.2 mm/day	77.7%	5.4 m/s	13.1 hours
May	14.7 °C2.3° to 27.5°	3.5 mm/day	77.8%	4.6 m/s	14.4 hours
June	20.2 °C7.8° to 30.4°	3.6 mm/day	76.9%	3.9 m/s	15 hours
July	22.9 °C12.6° to 32°	3.3 mm/day	74.7%	3.6 m/s	14.7 hours
August	22.3 °C12.5° to 32.2°	3.3 mm/day	73.3%	3.5 m/s	13.6 hours
September	18.4 °C6.6° to 30.9°	2.8 mm/day	71.8%	4.1 m/s	12.2 hours
October	11.5 °C-0° to 26.2°	2.9 mm/day	74.7%	4.9 m/s	10.8 hours
November	4.4 °C-5.9° to 18.6°	2.3 mm/day	80.1%	5.4 m/s	9.6 hours
December	-1.2 °C-13.6° to 12.2°	1.9 mm/day	86.2%	5.4 m/s	9 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: January: -4 °C; July: 22.9 °C; Change from January to July: +26.9 °C
Precipitation: January: 1.9 mm/day; July: 3.3 mm/day; Change from January to July: +1.4 mm/day
Daylight: January: 9.4 hours; July: 14.7 hours; Change from January to July: +5.3 hours

Calculated climate highlights

Tracing the annual shift in temperature, average daily precipitation, wind, and daylight duration.

Calculated Monthly Climate Highlights for Indiana Dunes National Park

Users can browse the calculated monthly highs and lows for Indiana Dunes National Park, pinpointing the warmest, coolest, wettest, and driest periods based on climatology records from the United States. Comparing these baseline averages for relative humidity, wind speed, and daylight duration offers key geographic context while separating long term monthly trends from single day weather extremes.

Warmest month: July22.9 °C
Coolest month: January-4 °C
Wettest month: June3.6 mm/day
Driest month: February1.8 mm/day
Most humid month: January87.5%
Windiest month: January5.8 m/s
Longest daylight: June15 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

Analyze seasonal patterns and atmospheric averages across diverse national park environments

Indiana Dunes National Park Monthly Climate Comparison with Other Protected Landscapes

Expanding a climate inquiry beyond the dunes of Indiana Dunes National Park allows for a direct contrast of monthly normals across other protected landscapes. Comparing standardized measurements of temperature, precipitation, humidity, wind, and daylight against other parks within the region reveals how distinct terrains shape local atmospheric patterns over time.