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Sweater Weather is Here

The cool, crisp weather has arrived and along with it are the gorgeous colors of autumn!

Our neighborhood trees are certainly magical looking but their color changes all boil down to SCIENCE:

  • During the summer season, the leaves are green because of a substance called chlorophyll.
  • In the leaves, chlorophyll absorbs sunlight and reacts with water and carbon dioxide to produce a sugary food for the tree (sap) in a process called photosynthesis.
  • Once the sunlight hours begin to shorten, photosynthesis stops and the chorophyll starts to break down, causing the green color to fade.
  • Plant leaves also have other colored pigments, like yellow and orange, called carotenoids. These colors start to show through as the green chlorophyll production declines.
  • The pigments responsible for red, pink and purple colors, or anthocyanins, are produced just before the leaves fall and are due to increased sugar concentrations in the leaves..
  • Most of the coloful shades we see are due to mixtures of residual chlorophyll with these yellow, orange and red pigments. 
  • The intensity, and duration, of leaf color is affected by moisture, temperature and sunlight.

To find out more about fall leaf color visit here.

Don't miss out on this beautiful time of year to visit Knoch Knolls Park and the nature center.

Through October the nature center is open Monday through Saturday from 9 am - 5 pm and Sunday from 12 pm to 5 pm.

Begining in November our hours are Monday - Friday, 9 am - 4 pm, Saturday, 10 am - 3 pm and Sunday, 11 am - 3 pm (Closed Sundays in Dec, Jan & Feb).

Our parks are open year round from sunrise to sunset.

Enjoy the autumn season!


Contact Us

320 Knoch Knolls Road
Naperville, IL 60540
630-864-3964

Winter Hours
December-February
Monday-Friday, 9:00 a.m.-4:00 p.m.
Saturday, 10:00 a.m.-3:00 p.m.
Sunday, Closed
Nature Center will be closed December 22-January 1, 2020

Regular Hours

March-October

Monday-Saturday, 9:00 a.m.-5:00 p.m.
Sunday, 12:00-5:00 p.m.

Registration Hours
Mon-Fri, 9:00 a.m.-1:00 p.m.

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© 2019 Knoch Knolls Nature Center a Naperville Park District Facility