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Old 10-28-2013, 01:15 PM
Location: Vernon, British Columbia
3,020 posts, read 3,377,653 times
Reputation: 2164


One way to see which places have the most and least variability between seasons is to look at how the diurnal temperature range changes throughout the year.

For example:

Midway, British Columbia, has a range in August of 19.7°C and 6.0°C in December. This is a change of 13.6°C (24.5°F) between these two months, which marks the highest in Canada. Other places in the southern interior of British Columbia have similar changes. 13.1°C in Passmore, 12.9°C in Lumby, and 12.4°C in Castlegar.

In some ways absolute differences might not be the best way to make a comparison. For example, what's more impressive, a place that changes from 20°C to 6°C or a place than changes from 16°C to 2°C? With this in mind, I've also sorted all Canadian weather stations in terms of difference between the monthly diurnal ranges divided by lowest month. This method doesn't even put Midway in the top 20 (the diurnal range difference between Aug and Dec is only 2.26 times greater than December).

The top three in Canada are:
1) Mica, BC = 3.03 ((14.64°C in Aug - 3.63°C in Nov)/3.63)
2) Nelson, BC =3.02 ((15.13°C in Aug - 3.76°C in Dec)/3.76)
3) Castlegar, BC = 2.97 ((16.58°C in Aug - 4.18°C in Dec)/4.18)

At the other end of the spectrum, the places with the lowest month to month change in diurnal range in absolute terms are:
1) Triple Island, BC = 0.5°C (3.38°C in July to 3.88°C in April)
2) Charlesville, NS = 0.76°C (6.55°C in November to 7.31°C in June)
3) Bonilla Island, BC = 0.88°C (3.62°C in January to 4.41°C in April)

And in relative terms:
1) Charlesville, NS = 0.12°C (0.76°C/6.55°C)
2) Triple Island, BC = 0.15°C (0.5°C/3.38°C)
3) Rocky Mountain House, AB = 0.16°C ((14.54°C in May - 12.54°C in Nov)/12.54°C)

Last edited by Glacierx; 10-28-2013 at 01:26 PM..
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