Indianapolis Weather Forecast
Indianapolis weather: 73°F, partly cloudy. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Risk assessment for Indianapolis
Derived from the current forecast window - not an official warning.
Peak gusts of 27 mph and 1 thunderstorm day in the next 16 days.
Wettest single day forecast at 0,2 in, 0,6 in across the window. Flash flooding risk rises sharply above 50 mm in a day.
16-day forecast for Indianapolis
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Fri, Sep 18 | 🌦️ Drizzle | 78° / 72° | 35% · 0,0 in | 8 mph | 5 |
| Sat, Sep 19 | 🌧️ Rain | 83° / 68° | 35% · 0,1 in | 11 mph | 6 |
| Sun, Sep 20 | 🌦️ Drizzle | 90° / 68° | 40% · 0,1 in | 13 mph | 6 |
| Mon, Sep 21 | 🌦️ Drizzle | 71° / 61° | 49% · 0,1 in | 12 mph | 5 |
| Tue, Sep 22 | ☁️ Overcast | 66° / 59° | 34% | 11 mph | 4 |
| Wed, Sep 23 | ☁️ Overcast | 64° / 57° | 10% | 9 mph | 3 |
| Thu, Sep 24 | ☁️ Overcast | 67° / 55° | 4% | 8 mph | 3 |
| Fri, Sep 25 | ☁️ Overcast | 71° / 60° | 4% | 8 mph | 4 |
| Sat, Sep 26 | ☁️ Overcast | 74° / 56° | 2% | 6 mph | 5 |
| Sun, Sep 27 | ☀️ Clear sky | 79° / 56° | 6% | 5 mph | 5 |
| Mon, Sep 28 | ⛈️ Thunderstorm | 79° / 57° | 8% · 0,2 in | 14 mph | 4 |
| Tue, Sep 29 | 🌦️ Light drizzle | 59° / 53° | 19% · 0,0 in | 9 mph | 3 |
| Wed, Sep 30 | ☁️ Overcast | 66° / 46° | 16% | 8 mph | 5 |
| Thu, Oct 1 | ☀️ Clear sky | 73° / 52° | 16% | 6 mph | 5 |
| Fri, Oct 2 | ⛅ Partly cloudy | 77° / 54° | 16% | 7 mph | 5 |
| Sat, Oct 3 | ☁️ Overcast | 86° / 60° | 19% | 8 mph | 5 |
What this means for Indianapolis
Today is about average for September. The forecast high of 78°F is in line with the 80°F typical for this month.
A 35% chance means rain is likely somewhere nearby at some point - carry a layer, but do not cancel.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 84°F.
See the Indianapolis forecast by time range
Indianapolis weather - more answers
Explore Indianapolis
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is Indianapolis?
Indianapolis is a city in Indiana. Its coordinates are 39.7684, -86.1581. It lies in North America.
What is the weather like in Indianapolis right now?
It is currently 73°F (23°C) with partly cloudy. Humidity is 85% and wind is 6 mph.
When is the best time to visit Indianapolis?
May, July, August, September and October offer the most comfortable conditions in Indianapolis, which has a continental climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Indianapolis in?
Indianapolis observes America/Indiana/Indianapolis (UTC-04:00). The local time is 2:30 AM.
How many people live in Indianapolis?
Indianapolis has a population of approximately 880.000.
What is the nearest airport to Indianapolis?
The closest airports are O'Hare International Airport (ORD), 178 mi away and Nashville International Airport (BNA), 253 mi away.
What are the top things to do in Indianapolis?
Popular options include Indiana Dunes National Park, Mammoth Cave National Park, Starved Rock State Park, Hocking Hills State Park, Cumberland Falls State Resort Park and Gateway Arch National Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (cities-us) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated September 19, 2026 at 2:30 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
