The graphic to the left compiles the average temperatures during the day and night in each region of Indiana.
Averages Last Year
The average temperatures during October for Indianapolis were higher than normal. Comparing the first two weeks of October in 2021:
Oct. 1 - a high of 80 and a low of 58
Oct. 15 - a high of 73 and a low of 53
Averages So Far this Year
These first two weeks of October 2022 gave us cooler temperatures than last year in Indianapolis:
Oct. 1 - a high of 74 and a low of 47
Oct. 15 - a high of 59 and a low of 37
What Can We Expect?
This phenomenon of cooler temperatures is not exclusive to Indianapolis. Looking into the end of October and the Fall months ahead we can expect lower temperatures than last year, but temps that are consistent with the past decade of weather averages.
What About My City?
A helpful web page you can use to compare your own city's average temps from 2021 to this year is: Weather Spark
Just type in your city and data graphs for past years, as well as 2022, will appear.
Weather + Phenology: How Do They Relate?
The temperature impacts the phenology cycle of plants especially during these critical season changes. At this time in Indiana, the temp is getting low enough to cause leaves to start changing color and fall off their trees. If there is a drastic change in the typical expected temp for this month or next, it could lead to this process happening sooner than normal, or later than normal. This in turn affects the life cycle timing for many insects and animals who use these plants as a food source.