Weather on September 30 at Indiana Dunes

Indiana Dunes National Park

INMidwest600 ft elevation
Avg High72°F
Avg Low49°F
Warmest201978°F
Coldest198446°F

Based on 54 years of data from Gary, IN

Planning Your Visit

September 30th in Indiana Dunes National Park (via Gary, IN) typically brings pleasant fall weather, with average highs around 72°F and lows near 49°F. Over 54 years of records, the warmest September 30th was in 2019 (78°F average), while the coldest was 1984 (46°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 20% of September 30th dates historically, with the wettest September 30th recording 2.11" of rain. The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.

The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.

Planning for September 30th in Indiana Dunes? Great weather for outdoor activities.

Year by Year History

YearHighLowPrecipSnow
202584°F59°F0"0"
202475°F60°F--0"
202372°F57°F0"0"
202263°F43°F0"0"
202181°F57°F0"0"
202060°F47°F0"0"
201987°F68°F----
201874°F51°F----
201767°F42°F0"0"
201666°F59°F0.25"0"
201567°F48°F0.03"0"
201480°F52°F0"0"
201364°F46°F0"0"
201271°F45°F0"0"
201167°F50°F0.64"0"
201076°F50°F0"0"
200955°F50°F0.03"0"
200869°F57°F0.3"0"
200783°F57°F----
200660°F45°F0.13"0"
200558°F41°F0"0"
200461°F40°F0"0"
200357°F41°F0"0"
200282°F62°F0"0"
200162°F42°F0"0"
200074°F52°F0"0"
199969°F40°F0"0"
199877°F53°F2.11"0"
199777°F49°F0"0"
199677°F50°F0"0"
199463°F43°F0"0"
199360°F32°F0"0"
199266°F37°F0"0"
199182°F53°F0"0"
199060°F50°F0"0"
198978°F42°F0"0"
198880°F60°F0"0"
198764°F44°F0"0"
198675°F65°F2.11"0"
198576°F47°F0.89"0"
198459°F34°F0"0"
198380°F50°F0"0"
198285°F54°F0"0"
198185°F52°F0"0"
198084°F37°F0"0"
197982°F60°F0"0"
197875°F59°F0.46"0"
197775°F55°F0"0"
197675°F46°F0"0"
197575°F45°F0.28"0"
197461°F36°F0"0"
197372°F57°F0"0"
197257°F38°F0"0"
197191°F60°F0"0"

September 30 at Nearby Parks

Holiday Weather at Indiana Dunes

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

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