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What to Expect in December: Weather

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 December for Indianapolis were almost exactly as predicted in the graphic to the left in the beginning of the month, but gradually getting colder as the month progressed. Comparing the first two weeks of December in 2021:

Dec. 1 - a high of 50 and a low of 32.

Dec. 15 - a high of 63 and a low of 48.

What Can We Expect?

Based on the graphic to above and last year's average temps it is hard to predict that the weather will be like this December. But, if the weather continues the trend of last year then we can expect a warmer winter this year as well.

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.

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