Our verdict
The best time to visit Indianapolis is May
During the warmer months, temperatures in Indianapolis can rise to a maximum of 30℃ (86℉). The weather at night in the winter can get down to temperatures as low as -11℃ (13℉).
The days are longest in Indianapolis in July, so if you want to see the sights during the day when the sun is up for the longest time, it’s best to visit around that time of year. The wet season in Indianapolis falls around May, so if you prefer the dryer weather, you should look to visit in February instead.
Learn everything you need to know (and none of the stuff you don’t) about when to go to Indianapolis below. Be sure to check out the handy tools we’ve included to help you search for flights and transport, accommodation, and everything else you need to plan and book your trip.
Quick links: Fast facts / Seasons / Average temperatures / Monthly climate / FAQs / Map
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Indianapolis seasons
Before you continue, it’s important to know when the seasons are in Indianapolis as they might be different to yours depending on where in the world you’re travelling from. Indianapolis is in the Northern Hemisphere, so the seasons fall during these months:
| Season | Months |
|---|---|
| Summer | June to August |
| Autumn/fall | September to November |
| Winter | December to February |
| Spring | March to May |
Average temperatures in Indianapolis
If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Indianapolis for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.
Indianapolis climate by month
If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Indianapolis for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.
Jump to:
Indianapolis in January
- Average temperature: -3℃ (27℉)
- Average high temperature: 1℃ (33℉)
- Average low temperature: -6℃ (21℉)
- Average humidity: 81%
- Average sunny days: 16 days
- Average rainfall: 35mm (1") over 7 days
- Average snow days: 8 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Indianapolis in January, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Indianapolis in February
- Average temperature: -0℃ (32℉)
- Average high temperature: 3℃ (38℉)
- Average low temperature: -4℃ (25℉)
- Average humidity: 81%
- Average sunny days: 15 days
- Average rainfall: 31mm (1") over 7 days
- Average snow days: 7 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Indianapolis in February, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Indianapolis in March
- Average temperature: 6℃ (42℉)
- Average high temperature: 10℃ (50℉)
- Average low temperature: 2℃ (35℉)
- Average humidity: 76%
- Average sunny days: 15 days
- Average rainfall: 48mm (2") over 13 days
- Average snow days: 4 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Indianapolis in March, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Indianapolis in April
- Average temperature: 12℃ (53℉)
- Average high temperature: 16℃ (62℉)
- Average low temperature: 7℃ (45℉)
- Average humidity: 76%
- Average sunny days: 14 days
- Average rainfall: 57mm (2") over 14 days
- Average snow days: 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Indianapolis in April, make sure you pack a warm jacket or coat.
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Indianapolis in May
- Average temperature: 18℃ (64℉)
- Average high temperature: 22℃ (72℉)
- Average low temperature: 13℃ (56℉)
- Average humidity: 79%
- Average sunny days: 11 days
- Average rainfall: 68mm (3") over 18 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Indianapolis in May, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.
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Indianapolis in June
- Average temperature: 22℃ (72℉)
- Average high temperature: 27℃ (80℉)
- Average low temperature: 18℃ (64℉)
- Average humidity: 80%
- Average sunny days: 12 days
- Average rainfall: 61mm (2") over 15 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Indianapolis in June, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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Indianapolis in July
- Average temperature: 23℃ (74℉)
- Average high temperature: 28℃ (82℉)
- Average low temperature: 19℃ (65℉)
- Average humidity: 81%
- Average sunny days: 12 days
- Average rainfall: 43mm (2") over 15 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Indianapolis in July, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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Indianapolis in August
- Average temperature: 22℃ (72℉)
- Average high temperature: 27℃ (81℉)
- Average low temperature: 18℃ (64℉)
- Average humidity: 79%
- Average sunny days: 14 days
- Average rainfall: 37mm (1") over 14 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Indianapolis in August, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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Indianapolis in September
- Average temperature: 19℃ (66℉)
- Average high temperature: 24℃ (76℉)
- Average low temperature: 15℃ (58℉)
- Average humidity: 76%
- Average sunny days: 15 days
- Average rainfall: 37mm (1") over 12 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Indianapolis in September, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
Indianapolis in October
- Average temperature: 13℃ (55℉)
- Average high temperature: 17℃ (63℉)
- Average low temperature: 8℃ (47℉)
- Average humidity: 73%
- Average sunny days: 19 days
- Average rainfall: 37mm (1") over 11 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Indianapolis in October, make sure you pack a warm jacket or coat.
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Indianapolis in November
- Average temperature: 6℃ (43℉)
- Average high temperature: 10℃ (49℉)
- Average low temperature: 2℃ (36℉)
- Average humidity: 75%
- Average sunny days: 19 days
- Average rainfall: 33mm (1") over 9 days
- Average snow days: 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Indianapolis in November, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Indianapolis in December
- Average temperature: 1℃ (34℉)
- Average high temperature: 4℃ (39℉)
- Average low temperature: -2℃ (28℉)
- Average humidity: 82%
- Average sunny days: 17 days
- Average rainfall: 40mm (2") over 9 days
- Average snow days: 6 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Indianapolis in December, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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