United StatesAverage weather for Indiana in September
It's warm in September in Indiana with an average temperature of 25°C. Temperatures this month range from a low of 22°C to a high of 28°C. At night, you can expect temperatures between 11°C and 17°C.
Start of September
The month of September starts in Indiana with hot temps, averaging around 27°C during the day and nights around 17°C. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
With the temperature difference between day and night, it’s smart to wear layers.
Mid September
By mid-September, daytime temps drop to around 26°C, with nights around 14°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
Since it cools down at night, it’s a good idea to wear layers.
End of September
By the end of September, the average daytime temperature in Indiana is around 25°C, while nighttime temps are about 13°C. A shower might pop up, but overall, the weather will be dry and sunny.
In September, there is an average of 143 mm of precipitation, spread over 7 days. The wind speed is around 3 Bft, mostly coming from the South.
Indiana in September |
New York | ||
|---|---|---|---|
 Average temperature |
25°C | 27°C | |
 Max. temperature |
28°C | 31°C | |
| Min. temperature |
22°C | -5°C | |
 Total precipitation |
143 mm | 57 mm | |
| Rainy days |
7 days | 9 days | |
August
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is September a good time to visit Indiana?
Looking for sun? September isn’t a good month to be in Indiana. The temperature is nice, but there’s too much chance of rain.
Temperature records
With 34°C in 2015, Indiana reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 15°C in 2021. The extreme nighttime temperatures ranged from a lowest recorded value of 3°C to a highest value of 23°C.
Check out the climate of Indiana for all months and discover the best travel time
The climate in Indiana is based on weather data from . Other places, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in Indiana to get the full picture of the climate.
Daily Temperature in September in Indiana
This chart shows the average daily high and low temperatures in September for Indiana, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Indiana
The chart below shows the average daily precipitation in September for Indiana, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 7 days of precipitation in Indiana.
Daily UV index in September in Indiana
This chart shows the average daily UV index in September in Indiana, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Indiana over the years
This chart shows the average temperature in September in Indiana, measured in degrees Celsius, over the past few years.
Total precipitation in September in Indiana over the years
This chart shows the average precipitation in September in Indiana, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Indiana
Click on any day in September to get detailed info about the usual weather on that day in Indiana. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Indiana
Have you been to Indiana in September?
Share your weather experience in September in Indiana.
Average weather in Indiana by month
Click on a month below to see detailed weather info for Indiana. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
