Indianapolis weather in May
May in Indianapolis: nice, rainy, with clean air — one of the best months to visit.
#2 of 12 months in Indianapolis · #198 of 897 destinations to visit in May · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Indianapolis in May
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Indianapolis climate normals — May
| Daytime high | 22°C / 72°F | 😎 nice |
|---|---|---|
| Nighttime low | 13°C / 55°F | |
| Rainfall | 118 mm / 4.6 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 67% | 💧 humid |
| Dew point | 11°C / 53°F | |
| Sunshine | 9.8 h/day | |
| Daylight | 14.4 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 48 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Indianapolis in May — FAQ
- Is May a good time to visit Indianapolis?
- May in Indianapolis: nice, rainy, with clean air — one of the best months to visit. It ranks #2 of 12 months for Indianapolis on SeasonMap's comfort score (89/100).
- What is the weather like in Indianapolis in May?
- In May, Indianapolis averages a daily high of 22.3°C and a low of 12.6°C, with about 117.6 mm of rain over roughly 13.8 rainy days.
- What is the air quality in Indianapolis in May?
- Indianapolis has a mean US Air Quality Index of about 48 in May.