Indianapolis, Indiana weather in October

Averages from 2021–2025 (155 days of record).

Average high: 68°F
Average low: 49°F
Rainy days: ~9 per month
Total precipitation: 2.6 in
Warmest recorded: 85°F
Coldest recorded: 26°F

Expect October days in Indianapolis, Indiana to top out around 68°F and cool to about 49°F overnight, with roughly 9 days of measurable rain across the month. In recent years October has ranged from 26°F to 85°F.

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Current Indianapolis, Indiana forecast → · Historical data by Open-Meteo (ERA5).