Indiana Dunes National Park
Weather History, Monthly Averages & Best Time to Visit
INMidwest600 ft
Look Up a Specific Date
Best Time to Visit
RecommendedMay - October
Late spring through early fall offers the best conditions.
AvoidNovember - March (cold temperatures, some facilities closed)
Tip: Fall foliage in late September and October can be spectacular.
Monthly Climate Averages
Historical temperature and precipitation averages for Gary, IN, based on 55+ years of weather data.
Warmest MonthJulyAvg High: 85°F / Low: 63°F
Coldest MonthJanuaryAvg High: 31°F / Low: 15°F
Jan
31°/ 15°
💧 4.9"
❄️ 1.9"
Feb
36°/ 19°
💧 4.5"
❄️ 2.0"
Mar
48°/ 29°
💧 6.6"
❄️ 2.0"
Apr
60°/ 38°
💧 7.8"
❄️ 2.4"
May
72°/ 48°
💧 8.4"
Jun
81°/ 57°
💧 10.7"
Jul
85°/ 63°
💧 9.5"
Aug
83°/ 61°
💧 9.5"
Sep
77°/ 54°
💧 9.9"
Oct
65°/ 43°
💧 7.2"
❄️ 2.1"
Nov
50°/ 33°
💧 7.4"
❄️ 1.4"
Dec
37°/ 22°
💧 6.5"
❄️ 1.8"
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
Data from Gary, IN. Expect ~2°F cooler at elevation.
Seasonal Weather
Gateway Cities
Nearby Parks
Official NPS Websitenps.gov/indu
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