Will it rain in
Indianapolis today?
Live hourly rain forecast and run verdict for Indianapolis, Indiana, US.
Running in Indianapolis means facing the heartland's wild weather swings — from muggy summers to frigid, icy winters. Whether it's a humid morning on the Monon Trail, a spring storm sweeping through the city, or black ice on the canal towpath, knowing whether to head out before you lace up matters. RainOrRun checks live conditions in Indianapolis right now and gives you an instant verdict — plus the best hourly window if the weather's on the fence. We'll also recommend the right gear for whatever Indy's Midwest weather is throwing at you today.
What to wear
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How often does it rain in Indianapolis?
Indianapolis records around 1168mm of rain a year, spread across about 129 days — roughly 35% of all days, or 11 days in an average month. That puts Indianapolis mid-pack: rain interrupts roughly one run in three, so it pays to check the hourly forecast before a long run, but you will not be running in waterproofs week after week.
The wettest month is March, averaging 135mm across about 13 rainy days. The driest is September, with 74mm over roughly 7 days. Average lows in January drop to -5°C, cold enough that gloves, a headband and a thermal base layer make a real difference on early runs. At the other end, July averages 29.2°C highs — hot enough that early morning and evening are the sensible windows, and hydration matters more than waterproofing.
Those are ten-year averages, not a forecast. What actually matters on the day is the next twelve hours — which is what the live verdict and hourly strip at the top of this page are for.
| Month | Rainfall | Rainy days | Avg high | Avg low |
|---|---|---|---|---|
| January | 88mm | 10 | 3.1°C | -5°C |
| February | 82mm | 9 | 6.1°C | -3.9°C |
| March | 135mm | 13 | 11.3°C | 1°C |
| April | 105mm | 12 | 16.9°C | 6°C |
| May | 125mm | 14 | 23°C | 12.6°C |
| June | 102mm | 12 | 28°C | 17.6°C |
| July | 117mm | 13 | 29.2°C | 19.6°C |
| August | 90mm | 11 | 28.4°C | 18.7°C |
| September | 74mm | 7 | 26.1°C | 16°C |
| October | 80mm | 10 | 19.1°C | 9.6°C |
| November | 81mm | 9 | 11.1°C | 2.4°C |
| December | 89mm | 9 | 6.5°C | -1.6°C |
Historical data: Open-Meteo archive, 2015–2024. A “rainy day” means at least 1mm of precipitation.
Running in Indianapolis: common questions
Will it rain in Indianapolis today?
The forecast card at the top of this page shows Indianapolis's rain probability for the current hour, plus an hour-by-hour breakdown for the rest of the day, using live Open-Meteo data. Historically, Indianapolis sees rain on about 129 days a year, so on any given day there is roughly a 35% chance of some rain falling.
Is it a good day to run in Indianapolis?
RainOrRun scores the live Indianapolis forecast on rain probability, rainfall amount, temperature, wind speed and severe weather, then returns a single verdict: Go, Maybe, or Don't Bother. A Maybe means conditions are borderline and it is worth picking your window rather than skipping the run.
What is the best time to run in Indianapolis today?
The hourly strip above highlights the best single window of the day for Indianapolis — the hour combining the lowest rain probability with the most comfortable temperature. You can also check up to eight days ahead using the date picker if you are planning a long run or a race.
What should I wear running in Indianapolis today?
The gear section on this page updates with the live Indianapolis forecast: a waterproof jacket and peaked cap when rain probability goes above 40%, a thermal base layer and gloves below 8 degrees Celsius, and a high-vis vest when wind or low light make you harder to see.
What is the wettest month in Indianapolis?
March is the wettest month in Indianapolis, averaging 135mm of rain across about 13 rainy days. September is the driest, with around 74mm over roughly 7 days. Figures are ten-year averages covering 2015 to 2024.
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