Average Weekly Temperatures

Weekly Average Temperatures (°C) — Portland, Ontario (Approx.)

Approximate weekly averages for the Portland / Kingston-area climate, covering April 1 through October 15. Values shown as Avg High, Avg Low, and Avg Mean in °C.

Week Approx Dates Avg High (°C) Avg Low (°C) Avg Mean (°C)
Wk 1Apr 1–7926
Wk 2Apr 8–141037
Wk 3Apr 15–211148
Wk 4Apr 22–301258.5
Wk 5May 1–715811.5
Wk 6May 8–1416912.5
Wk 7May 15–21171013.5
Wk 8May 22–31181114.5
Wk 9Jun 1–7201316.5
Wk 10Jun 8–14211417.5
Wk 11Jun 15–21221418
Wk 12Jun 22–30231519
Wk 13Jul 1–7251721
Wk 14Jul 8–14261822
Wk 15Jul 15–21261822
Wk 16Jul 22–31251721
Wk 17Aug 1–7251721
Wk 18Aug 8–14241620
Wk 19Aug 15–21241620
Wk 20Aug 22–31231519
Wk 21Sep 1–7221418
Wk 22Sep 8–14211317
Wk 23Sep 15–21201216
Wk 24Sep 22–30181014
Wk 25Oct 1–715811.5
Wk 26Oct 8–151369.5

Note: Weekly values are approximations based on regional climate normals and smoothed across the season.