Indianapolis Climate and Average Weather
Climate of Indianapolis: average temperatures, rainfall and seasons month by month.
Climate in Indianapolis month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 32° | 19° | 2,7 in | ★★☆☆☆ |
| February | 44° | 26° | 1,7 in | ★★★☆☆ |
| March | 58° | 38° | 5,2 in | ★★★☆☆ |
| April | 66° | 47° | 6,3 in | ★★★☆☆ |
| May | 72° | 54° | 4,5 in | ★★★★☆ |
| June | 83° | 65° | 5,5 in | ★★★★☆ |
| July | 86° | 69° | 4,3 in | ★★★★☆ |
| August | 83° | 65° | 2,3 in | ★★★★☆ |
| September | 80° | 60° | 2,7 in | ★★★★☆ |
| October | 68° | 49° | 2,1 in | ★★★★☆ |
| November | 53° | 38° | 2,6 in | ★★★☆☆ |
| December | 43° | 29° | 3,1 in | ★★☆☆☆ |
Climate type: Continental. Source: Open-Meteo archive (ERA5).
Recent extremes in Indianapolis
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Indianapolis compares with nearby places
Annual averages, and the difference against Indianapolis.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Louisville | 107 mi | 58°F | +35°F warmer | 48 in |
| Kentucky | 128 mi | 57°F | +34°F warmer | 47 in |
| Indiana Dunes National Park | 138 mi | 52°F | 35°F cooler | 42 in |
| Cook County | 165 mi | 52°F | 35°F cooler | 40 in |
| Chicago | 165 mi | 52°F | 35°F cooler | 40 in |
Best time to visit Indianapolis
Go in July, August, September and October. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
What this means for Indianapolis
Today is about average for August. The forecast high of 82°F is in line with the 83°F typical for this month.
A 24% chance means most of the area stays dry; a passing shower is possible but short.
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.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
Summary
Indianapolis is a city in Indiana. Indianapolis is known for Motor Speedway and canal walk. It has a population of about 880.000.
Right now it is 71°F (21°C) in Indianapolis with clear. It feels like 73°F. Today runs from 67°F to 82°F. Chance of precipitation is 24%. Sightseeing conditions score 9.1/10 - excellent - go now.
The best time to visit Indianapolis is July, August, September and October. The climate is continental. January, February and December tend to be the least comfortable months. July is the warmest month with average highs near 86°F, while January is the coldest with lows near 19°F.
The closest major airport is O'Hare International Airport (ORD), about 178 mi away. Nearby highlights include Indiana Dunes National Park, Mammoth Cave National Park, Starved Rock State Park and Hocking Hills State Park.
In plain terms. Today is about average for August. The forecast high of 82°F is in line with the 83°F typical for this month. The best window to be outside is roughly 10 AM to 1 PM, when temperature, rain chance and wind line up best. stargazing is the strongest bet in Indianapolis today at 9.2/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Indianapolis
| Type | City |
|---|---|
| State | Indiana |
| Country | United States |
| Continent | North America |
| Coordinates | 39°46′6.2″N 86°9′29.2″W (39.7684, -86.1581) |
| Population | 880.000 |
| Known for | Motor Speedway and canal walk |
| Local time | 3:45 PM (UTC-04:00) |
| Best months | July, August, September and October |
| Climate | Continental |
Weather map for Indianapolis
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore Indianapolis
Every topic we hold for this place, and the same topic for the places around it.
Climate 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 71°F (21°C) with clear. Humidity is 73% and wind is 5 mph.
When is the best time to visit Indianapolis?
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 3:45 PM.
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 August 23, 2026 at 3:45 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
