I know it is Fall/Autumn when I observe:

• The leaves in my yard are changing color. (submitted by Iowasciencegal)
• It is getting dark earlier at night. (submitted by Iowasciencegal)
• When there are colored Leaves on the Trees. (IMPACT teachers)
• Birds flying south. (Iowasciencegal)
• When it starts to get colder. (Orange GLOBE Club)
• My cat starts pacing.(Orange GLOBE Club)
• When hummingbirds leave Iowa. (Orange GLOBE Club)
• When squirrels gather nuts. (Orange GLOBE Club)
• When eagles come to Iowa. (Orange GLOBE Club)

I know it is Winter when I observe:

• The temperature is below zero F! (submitted by Iowasciencegal)
• My cat isn't interested in going outside to play. (submitted by Iowasciencegal)
• People using a snow shovel. (IMPACT Teachers)
• When animals hybernate. (Orange GLOBE Club)

I know it is Spring when I observe:

• My cat REALLY wants to go outside and play. (sumitted by Iowasciencegal)
• The trees begin to grow their new leaves. (submitted by Iowasciencegal)
• When there are daffodils. (IMPACT Teachers)
• We see robins for the first time. (Orange GLOBE Club)
• Flowers on the trees (Orange GLOBE Club)
• I hear birds singing. (Orange GLOBE Club)

I know it is Summer when I observe:

• My grandparents have their annual fish fry picnic. (submitted by Iowascience gal)
• Sunflowers begin to bloom. (submitted by Iowasciencegal)
• When the swimming pool opens. (IMPACT Teachers)

Which of the seasonal markers are natural and which are cultural?  Whenever you notice something that helps you know what season it is or that seasons are changing post it here!   Add the thing you observed and your first name.  To become a contributor to this page, click on the LOG IN link in the upper right of the page and REQUEST ACCESS or email iowasciencegal at iowasciencegal@gmail.com with your contribution and she will add it to the list.