June 2023 Review

It's time for our big look back at Edmonton's pretty warm weather for June 2023.

June 2023's average High of 23.7°C was our 7th warmest on record. It was behind the record 24.9°C from the 2021 heatdome, but ahead of 2022, and 2016-2020. 

The average Low of 12.8°C was our 2nd warmest on record, behind only 13.0°C from the 2021 heatdome.



High Temperatures

The heat from May 2023 carried into June, with new record Highs of 30.8°C on the 9th, and 31.9°C on the 13th.

Then we had a cold, rainy week, and on June 20th we set a record for coldest-High of 11.1°C. 

June ended up with 9 days below average, and 21 above.

In June we average about 5 Highs which reach 25°C. In 2023 we had 14, including 2 which reached 30°C. We also had 3 Highs below 15°C, which is about average.



Hot Days

At the end of June we've had 47 days reach 20°C, which is 6th most on record. The average is around 37.

That includes 26 days which reached 25°C, which is the most on record. and is more than many years (2020 & 2020) get in an entire summer.

At the end of June we've had 15 Highs reach 28°C, which is the most on record.

For 30°C days so far we've had 4. Recently 2021 had 6 by this point, and 1912 has the record with 9.



Low Temperatures

For the Lows, we set new warmest-Low records on the 9th, 10th and 12th. That was followed by a pretty cool week, and then we were above average to close the month.

Overall 9 Lows were below average and 21 were above.

June 2023 had our 2nd warmest Lows on record behind 2021, and so there were a lot of warm nights. We had 12 Lows above 15°C, when the average is 2.



Final Frost

Blatchford's final frost was way back on April 22nd, which was pretty early.

Calgary's final frost on April 26th set a new record for them.

Saskatoon's April 30th and Winnipeg's May 4th were both pretty early for them.

Regina's May 19th was typical.

Closer to home, the airport's final frost on April 29th set a new record there.

Stony Plain's April 26th was pretty early.

And Campsie's May 18th was typical for recent years, but would have been very early a few decades ago.



Warm & Cold Months

June 2023's High was 3°C warmer than the 20th century average, so here it is a medium-sized orange bubble. We've had lots of warm Junes recently, with a few cooler ones spread around. The Low was 4.2°C above average, and joins many orange bubbles in recent years.



Across Canada

Across the country June 2023 was well above average in the west, especially in Saskatchewan and Manitoba at 4°C above their 20th century average. Central Canada was closer to average.

June 2023's temperatures ranked in the top-5 or top-10 across the western cities.



The Horserace

We're 6 months into the year, and after the warm May & June 2023 ranks as Edmonton's 10th warmest year on record, with an overall temperature 1.5°C above our 20th century average. The Highs are a little cooler at 13th spot, and the Lows are in 9th spot.

For 2023's average Highs, so far Edmonton, Toronto, Ottawa, Montréal & Halifax are all having a top-15 year. For Lows Edmonton, Calgary, Ottawa & Halifax are having a top-20 year.



Precipitation

In June we average 80mm of precipitation. All of the local stations were above that, and Blatchford was in the lead with 150.3mm, for its 8th rainiest June on record. The airport had 139mm, and Stony Plain had 115mm.

In June we average around 14 rainy days. 

June 2023 had lots of rain, but number of rainy days was actually pretty low, with most stations down around 10 or 11.

We usually get some big summer storms in June, and 2023 was no exception.

Blatchford got 52mm on the 18th, and 40mm on the 15th. The airport's biggest storm was 41mm on the 18th, and Stony Plain got 47mm.

By the end of June we average 206mm of precipitation for the year.

After a very dry start to 2023, all of the rain in June pushed us up to around average, with 214mm at Stony Plain, 203mm at Blatchford, and 194mm at the airport.



The June 2023 Mini-Flood

With the June storms the river did have a mini-flood on June 22rd, reaching 6.75m and 1,374m3/s.

In recent years 2022 got to 1,454m3/s, 2020 was 1,899m3/s, and 2013 reached 2,847m3/s.



Precipitation Across Canada

This chart has the precipitation for 2023 for these 11 Canadian cities. 

Halifax and St. John's are at the top, with over 600mm. Central Canada and Vancouver are from 300-500mm. And the prairie cities are down below around 200mm.

For 2023 precipitation so far 2023 Toronto is having a top-10 year, Vancouver is having a bottom-10(ish) year, and Winnipeg is having one of its lowest years on record (which doesn't appear to be a measurement error?).

For June 2023 precipitation Halifax and Edmonton were the big winners with 214mm and 150mm.

The biggest storm was Edmonton's 52mm, but Halifax, St. John's, Regina and Toronto all had 30mm+ days.



July

For July, the average High is about 23.5°C. It has around 25 days reach 20°C, including about 10 at 25°C. Most July's will get at least one 30°C day, but recently 2020, 2019 and 2016 didn't. July is also usually our rainiest month, with an average of 90mm.