Canada Goose wrote:
Abby_wx wrote:I've read that climate change could turn us into a Mediterranean climate. There isn't enough data to prove anything yet, but this is exactly what we'd expect to happen -- warming and drying summers, and probably an extension of the dry season as well.
It appears that Victoria and Portland are already classified as Mediterranean, but the Lower Mainland has historically gotten just enough rain during the warm months to avoid that label.
Summers in Victoria and even in Portland are not warm enough to be classified as Mediterranean climate.
You need to have a mean T of 22 C in July and August and
low rainfall to be Mediterranean. Portand doesn't reach 21 C and Victoria has very cool summers.
But you're right on this point: dry season seems
to be drier year after year.
Nevertheless, a real
Mediterranean climate is warmer (by far) than the Lower Mainland climate. Even Kamloops is not warm enough!
Spences Bridge just reach this mark (22.1 C both in July and August) and the average précipitations is just right to have Mediterranean summer climate
, but there, this is a steppe climate, not Mediterranean.
By the way, Brett Anderson forecast is still nice...https://www.accuweather.com/en/weather- ... e/70004988
Actually, there are three types of Mediterranean climates: hot, warm, and cold. Most people are only familiar with the classic Mediterranean climate -- the hottest type, which as you stated requires a mean of 22C or higher.
The warm-type Mediterranean climate has a mean under 22C during the warmest months. The only reason Victoria has this type and Vancouver does not is because Victoria is much drier during the summer months. Vancouver instead has an Oceanic climate. One defining feature of an oceanic climate is reliable precipitation throughout the year, which Victoria does not have.
https://en.wikipedia.org/wiki/Victoria, ... ia#Climate
One feature of Victoria's climate is it has distinct dry and rainy seasons. Nearly two-thirds of the annual precipitation falls during the four wettest months, November to February. Precipitation in December, the wettest month (109 mm or 4.3 in) is nearly eight times as high as in July, the driest month (14 mm or 0.55 in). Victoria experiences the driest summers in Canada (outside of the extreme northern reaches of the Northwest Territories and Nunavut).
The third type of Mediterranean climate (cold) occurs only at higher elevations.