Weather on September 17 at Indiana Dunes

Indiana Dunes National Park

INMidwest600 ft elevation
Avg High75°F
Avg Low54°F
Warmest197278°F
Coldest198152°F

Based on 55 years of data from Gary, IN

Planning Your Visit

September 17th in Indiana Dunes National Park (via Gary, IN) typically brings pleasant fall weather, with average highs around 75°F and lows near 54°F. Over 55 years of records, the warmest September 17th was in 1972 (78°F average), while the coldest was 1981 (52°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 27% of September 17th dates historically, with the wettest September 17th recording 6.73" of rain. The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.

The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.

Planning for September 17th in Indiana Dunes? Great weather for outdoor activities.

Year by Year History

YearHighLowPrecipSnow
202579°F58°F0"0"
202488°F57°F0"0"
202373°F55°F0.43"0"
202283°F62°F0"0"
202184°F--0"0"
202069°F55°F----
201972°F63°F0"0"
201887°F58°F----
201788°F68°F0"0"
201681°F66°F0.66"0"
201581°F59°F0"0"
201465°F43°F0"0"
201361°F48°F0"0"
201275°F53°F0"0"
201160°F46°F0"0"
201069°F56°F0.03"0"
200972°F51°F0"0"
200871°F54°F0"0"
200772°F53°F0"0"
200680°F63°F0"0"
200563°F50°F0.03"0"
200468°F54°F0"0"
200382°F55°F0"0"
200272°F50°F0"0"
200169°F54°F0"0"
200066°F50°F0"0"
199978°F41°F0"0"
199877°F55°F0"0"
199781°F53°F0"0"
199665°F54°F0.03"0"
199584°F61°F1.3"0"
199486°F54°F0"0"
199365°F53°F0"0"
199281°F66°F0"0"
199176°F49°F0"0"
199064°F44°F0"0"
198976°F47°F0"0"
198888°F68°F0"0"
198776°F62°F0.36"0"
198670°F45°F0"0"
198580°F58°F0"0"
198470°F38°F0"0"
198375°F50°F0.03"0"
198272°F48°F1.27"0"
198155°F48°F6.73"0"
198075°F--3.81"0"
197979°F43°F0"0"
197885°F66°F0.58"0"
197779°F60°F0.18"0"
197672°F54°F0"0"
197573°F54°F0"0"
197481°F57°F0"0"
197360°F51°F1.52"0"
197286°F70°F0"0"
197170°F51°F0.38"0"

September 17 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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