Hot & Cold Days - Dashboard

Today we are going to take a look at two more interactive dashboards, and these ones will let you look at Edmonton's history of really warm & really cold days.

We talk about temperatures a lot around here, and these old posts have some detailed discussion on what we will see in the dashboards:

• Edmonton's Hottest Days
• First -20°C of the Winter of 2018-2019
• 1,080ish Days without -30°C

But now let's look at the dashboards:

Warm Days Each Year Dashboard

Cold Days Each Winter Dashboard

Both dashboards work the same way, but the warm days are grouped by Year (Jan-Dec) while the cold days are grouped by Winter (Jul-Jun).

Now we will take a look at some examples of how these can be used:

Warm Highs Each Year

The simplest thing we can do with these dashboards is to see all of the warm days for each year. This example image is for Highs of 25°C, but we can change that to 20°C or 30° or even 0°C.

With all of the history we can see which years had a lot or a few warm days, how things have changed over time, and when throughout the year the warm days occur.


Cold Lows Each Winter

And here's the cold version of the previous example, with the number of -25°C Lows each winter. Last winter 2018-2019 had more than average, but over the last century that average has fallen from close to 40 -25°C Lows each winter down to about 10.


Extremes: 33°C Highs

We can also use these dashboards to look at extreme temperatures. In this example we have all of Edmonton's Highs of 33°C or more, going back to 1880.


Late Frosts

Here we are looking at the history of frosts after May 15. To keep things simple we've limited this to recent years from 1985 onwards.


Slow Summers

The summer of 2019 has gotten off to a slow start, with a cold June & early-July.

Here the dashboard shows the number of 25°C days each year between June 1 & July 12. 2019 had 5 days, which is definitely on the low side of things, and is well below the last 4 years, but it isn't record-breakingly cold.


Early Winters

Here we have all of the -20°C Lows that occur really early in the winter, from mid-October to mid-November. The ridiculously cold Halloween of 1984 shows up with its low of -24°C.


Melty Winter Days

This chart shows how many High above freezing we get each January. This is something we've talked a lot about on this blog in the past, because Edmonton has always has mid-winter melts. But in recent January's we are at the top of the range, and it's less variable with most years being up over 10.


Cold Februarys

And finally, the February of 2019 was really cold - but how cold was it? Here we have the number of -25°C Lows each February. 2019's 16 was well below the records from back in the 1930s, but it was about 10 more than any February since 1979.

That's it for our tour of these two dashboards. They provide lots of interesting ways to slice and dice the data for Edmonton's warmest and coldest days.