Weather on October 18 at Indiana Dunes

Indiana Dunes National Park

INMidwest600 ft elevation
Avg High61°F
Avg Low41°F
Warmest201674°F
Coldest201839°F

Based on 55 years of data from Gary, IN

Planning Your Visit

October 18th in Indiana Dunes National Park (via Gary, IN) typically brings mild fall weather, with average highs around 61°F and lows near 41°F. Over 55 years of records, the warmest October 18th was in 2016 (74°F average), while the coldest was 2018 (39°F) — a 35°F range across recorded history. Precipitation has occurred on 36% of recorded October 18th dates, with snow falling 2% of the time (heaviest snowfall: 2.5"). The last decade has been 6.8°F warmer on this date compared to 20-30 years ago.

The last decade has been 6.8°F warmer on this date compared to 20-30 years ago.

Planning for October 18th in Indiana Dunes? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecipSnow
202577°F62°F----
202466°F38°F0"0"
202363°F40°F0"0"
202242°F35°F0.61"0"
202172°F39°F----
202057°F41°F----
201951°F34°F0"0"
201849°F30°F0"--
201770°F45°F0"0"
201682°F67°F0"0"
201549°F33°F0"0"
201461°F47°F0"0"
201351°F37°F0.25"0"
201263°F44°F1.52"0"
201157°F37°F0"0"
201061°F44°F0.03"0"
200949°F34°F0.13"0"
200858°F40°F0.08"0"
200773°F51°F1.88"0"
200656°F52°F0.03"0"
200574°F46°F0.1"0"
200452°F33°F0"0"
200355°F37°F0"0"
200244°F36°F0.13"0"
200149°F34°F0"0"
200059°F40°F0"0"
199950°F35°F0"0"
199867°F36°F0"0"
199758°F31°F----
199655°F33°F1.57"0"
199576°F47°F0"0"
199467°F59°F4.06"0"
199362°F36°F0"0"
199245°F37°F0"0"
199167°F44°F0"0"
199074°F39°F1.14"0"
198946°F39°F0"0"
198864°F47°F3.89"0"
198766°F37°F0"0"
198663°F32°F0"0"
198575°F52°F1.4"0"
198472°F37°F0"0"
198363°F40°F0"0"
198270°F44°F0"0"
198159°F40°F1.65"0"
198069°F40°F0.03"0"
197974°F51°F0"0"
197864°F45°F0.33"0"
197763°F42°F0.25"0"
197651°F31°F0"0"
197558°F40°F0"0"
197453°F39°F0"0"
197355°F41°F0"0"
197242°F37°F0.84"2.5"
197173°F52°F0"0"

October 18 at Nearby Parks

Holiday Weather at Indiana Dunes

Official NPS WebsiteVisit nps.gov/indu for park information, alerts, and reservations

Explore More at Indiana Dunes

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