In this City News Ottawa article, Ian Laidlaw from Davey's Ottawa office talks about the climatic conditions that affect trees and the color of their leaves. 

Posted: September 23, 2025

Several trees in the distance, some with green foliage and some with fall-colored foliage.While fall has officially kicked off, the warm weather is going to stick around a little bit longer.

Environment Canada’s future projections forecast above seasonal temperatures throughout September and much of October.

Fall officially began at 2:19 p.m. with highs in Ottawa reaching 23 C, with a humidex making it feel like 28.

Those temperatures will remain steady for the week, with overnight lows in the teens.

The 30-year average temperature for Ottawa in September is 15.3 C.

A particularly dry summer will also give way to a rainy start to autumn.

To continue reading this article, click here

For more information, contact the Ottawa office. 

The Davey Tree Expert Company, headquartered in Kent, Ohio, provides research-driven tree services, grounds maintenance and environmental and utility infrastructure consulting for residential, utility, commercial and environmental partners in the U.S. and Canada. As one of the top ten largest employee-owned companies in the U.S., Davey's 12,000 employees have been dedicated to creating and delivering sustainable solutions since 1880. Apply today to join the Davey legacy, and learn about how we're growing with our new SEED Campus

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