Hamilton will tie mark for warm June days


Published June 29, 2022 at 9:56 pm

June hath 30 days, and Hamilton will have a high temperature above 20C in every one of them.

That has not happened in the city in over a century. While temperatures have been milder in the city since an extreme-heat event last week, it has remained warm enough to get close to marks that were set at the turn of the 19th and 20th centuries.

The Weather Network says Hamilton could have a high of 31C on Thursday, which is the final day of June.

Weather historian Rolf Campbell posted statistics showing the only other times that Hamilton has a temperature of 20C or higher during every day in June was in 1899 and 1900. Prior to this month, the only other June where the high hit 20 in 29-of-30 days was in 1981.

More frequent instances of extreme heat are an off-shoot of climate change.

Per Environment and Climate Change Canada, Hamilton has had five days so far this month where the temperature reached the 30s.

Those were:

  • June 15: 30.7
  • June 16: 31.5
  • June 21: 32.8
  • June 22: 32.4
  • June 25: 30.1

The air often also feels hotter in parts of Hamilton that experience an urban heat island effect due to having more tall, dense buildings that can block air circulation and retain heat.

The lowest daytime highs this month were 20.3 on June 4, followed by 20.6 on Monday.

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