Indiana (PA) Temperature by Month
Indiana, Pennsylvania, United States of America has an average annual maximum temperature of 16°C (61°F), ranging from 2°C (36°F) in January to 28°C (82°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Indiana Monthly Temperatures
The climate in Indiana is dynamic, ranging widely from very cold in winter to comfortable in summer. Nights are significantly colder, with lows dropping from 16°C (61°F) in July to -8°C (18°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Indiana by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating.
The chart below shows the average temperature throughout the year:
Temperature: Indiana vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Indiana vs World: Temperature Compared
Indiana's average annual maximum temperature is 16°C (61°F). To put that in context, here's how it compares to a few well-known destinations:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Indiana this rarely lasts long on the ground.
For more on Indiana's weather — including monthly rainfall, sunshine hours, and humidity — visit our Indiana climate page.
