Indianapolis Weather in May
May in Indianapolis brings high temperatures, with daytime highs of 23°C (73°F) and nights around 12°C (54°F). Quite a bit of rainfall is expected, around 116 mm (4.6 in), so pack an umbrella.
Rainfall in Indianapolis in May
Past climate data indicates that roughly 15 days will see rain, totalling around 116 mm (4.6 in) for the month. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Indianapolis in May
In May, Indianapolis sees high temperatures, with highs of 23°C (73°F). Nights drop to around 12°C (54°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 12°C (54°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Indianapolis in May
The month enjoys around 270 hours of sunshine, creating mostly sunny days with good weather conditions.If you prefer enjoying temperate temperatures and rain-free days, August and September typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Indianapolis's climate page.
Indianapolis Temperature in May
Min Temperature
12°C (54°F)
Max Temperature
23°C (73°F)
Chance of Rain
50%
Precipitation
116 mm (4.6 in)
Rainy days
15 days
Humidity
68%
Sunshine
270 hours
Percentage Sunshine
60%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Indianapolis typically rise from around 20°C (68°F) at the start of May to approximately 26°C (79°F) by the end. Nights are cool, with lows typically ranging from 9°C (48°F) to 16°C (61°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Indianapolis in May
Browse day-by-day weather records for Indianapolis spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Indianapolis historical weather extremes in May
The extremes listed below come from historical weather data collected in Indianapolis from 1976 through 2026.
- The warmest day in May was on May 28, 2018, with a maximum of 35°C (95°F).
- Indianapolis registered its coldest May night on May 9, 2020, with temperatures dropping to -2°C (28°F).
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
perfect weather
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tolerable
unpleasant
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What to Wear in Indianapolis in May
Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Indianapolis in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Indianapolis's climate page.
Temperature Rainfall Sunshine Humidity
See the full Indianapolis climate overview or explore weather in the United States of America.
