Indianapolis in August
In August, Indianapolis averages 28°C (83°F) during the day and 19°C (66°F) at night, with around 11 days of rain (89 mm total).
High seasonConditions are warm and beach-friendly. Plan for unsettled weather and bring rain gear.
It's peak hurricane season in Indianapolis during August. Travel is possible but expect storm risk, possible flight disruption, and generally lower travel insurance coverage.
How August compares to the rest of the year in Indianapolis
August is one of the warmest months in Indianapolis (2nd of 12) and moderately rainy compared to the rest of the year (6th of 12). Daytime temperature runs 11°C above the annual average (17°C). August runs 1°C cooler than July (29°C) and cools 2°C in September (26°C).
August sunrise & sunset in Indianapolis
Times shown for Indianapolis local time (America/Indiana/Indianapolis), calculated for the 15th of August. They shift by a few minutes day to day across the month.
Photography light in Indianapolis — August
Golden-hour and blue-hour windows for the 15th of August, in Indianapolis's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Indianapolis in August
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on August's tier (High season) and Indianapolis's popularity.
Crowds & pricing — August in Indianapolis
This is a busy month in Indianapolis — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: comfortable tourism weather Northern Hemisphere summer holidays peak hazard season (1 active)
Sun & mosquito risk — August in Indianapolis
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Indianapolis in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 3°C / 38°F | -5°C / 23°F | 82 mm | 10 | — |
| February | 6°C / 42°F | -4°C / 24°F | 86 mm | 10 | — |
| March | 11°C / 52°F | 1°C / 33°F | 127 mm | 12 | — |
| April | 17°C / 63°F | 6°C / 43°F | 107 mm | 12 | — |
| May | 23°C / 73°F | 13°C / 55°F | 124 mm | 14 | — |
| June | 28°C / 82°F | 18°C / 64°F | 102 mm | 12 | — |
| July | 29°C / 84°F | 20°C / 67°F | 115 mm | 13 | — |
| August | 28°C / 83°F | 19°C / 66°F | 89 mm | 11 | — |
| September | 26°C / 79°F | 16°C / 61°F | 72 mm | 8 | — |
| October | 19°C / 66°F | 10°C / 50°F | 87 mm | 11 | — |
| November | 11°C / 51°F | 2°C / 36°F | 76 mm | 8 | — |
| December | 7°C / 44°F | -1°C / 30°F | 85 mm | 10 | — |
Other cities with similar August weather
🌍 See the full ranked list of climate twins for Indianapolis in August →
Frequently asked questions
How hot is Indianapolis in August?
In August, Indianapolis averages a high of 28°C (83°F) and a low of 19°C (66°F) — generally warm.
Does it rain a lot in Indianapolis in August?
August can be fairly wet in Indianapolis, with about 11 rainy days on average.
Is August a good time to visit Indianapolis?
August is warm. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Indianapolis in August?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full August packing list for Indianapolis for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.