October 2025 Review

September 2025 was Edmonton's warmest and basically driest on record. But did that continue into October 2025? Let's take a look...

October 2025 was above average, but not too extreme. The average High of 13°C was the 33rd warmest. That's below 5th place 2022, but above everything else since 2015. The average Low of 1.3°C was the 23rd warmest, and in the same range as 2024 & 2023.

It's always worth mentioning that October along with April are our least changed months. The Lows have warmed by a degree or two, but the average Highs aren't too different from 140 years ago. That's quite different from a month like January or even July.





High Temperatures

October's Highs were mostly close to or above average. The only particularly cold days were the 12th & 13th, although they were nowhere near the bottom of our range. Overall 21 Highs were above average and 10 were below.

October averages around 2 20°C Highs, and 2025 had 2. The warmest was 23.3°C on the 7th.

And it averages 2 below-freezing Highs, and 2025 had 0, although lots of years have 0. 2025's coldest was 2.3°C on the 12th.





Low Temperatures

October's Lows saw a bit of a dip mid-month, but overall 21 were above average and 10 were below.

October averages 13 below-freezing Lows, and 2025 had 11. But most Octobers get below -5°C, and on average we get 3 of those. But 2025's coldest was -3.6°C on the 14th.





First Frost

Blatchford's first frost was October 4th, a few days later than the average of September 29th. Stony Plain was a day after that on the 5th. Campsie and the Airport both had their first frosts back in September, which is typical for them.





Warm & Cold Months

October 2025 was above average, so it's a small orange bubble here. The average High of 13°C was 1.9°C warmer than the 20th century average. The average Low of 1.3°C was 1.8°C warmer.

So far February is 2025's only blue month.





Across Canada

Across the country October was another basically unanimously above-average month (Vancouver & Victoria were right on the edge). That joins September, August, June, April & March.

Quebec City was the most above-average, with Highs 3.4°C warmer than their 20th century average.





The Horserace

After our record September, October slowed down a bit. But with 2 months left in 2025, its average temperature is currently Edmonton's 3rd warmest overall, at 2.2°C above the 20th century average.

The Highs are our 3rd warmest, and Lows are 10th warmest.

With 2 months left, 2025's average temperature is top-5 in Dawson City, Kelowna, Edmonton & St. John's, and top-10 in Calgary, Montréal, Moncton & Charlottetown.





Precipitation

In October we average 18mm of precipitation. After the extremely low September, October was closer to average. The airport recorded 11mm, Campsie had 15mm, Stony Plain had 16mm, and Blatchford got 20mm.

By the end of October we average around 395mm of precipitation for the year.

2025 has had a really low September, July, April & February, so it's below average. Campsie has 372mm, and the airport has 362mm. But then Stony Plain is down at 283mm, and Blatchford has 269mm.

By October our big storm season is usually over. For 2025 the biggest day was Blatchford's 10.4mm on the 26th, and Campsie got 8.9mm on the 11th.





Snow

And October 2025 was snowfree. The airport averages around 7cm of snow in October, but we didn't get any in 2025, 2024, 2022 or 2021. 2023 got 2.7cm, while a year like 2016 got 22.2cm.

Sometimes we get early snow in October of September, but that melts off.

Once we hit November 1st though, that's the point where snow starts to hang around. Although in 2024 the airport made it to November 22nd without lasting snow, and 2023 got to December 3rd.





Precipitation Across Canada

These are the precipitation totals for 2025 across the country.

Quebec City is way out ahead with over 960mm. 

Most of these cities are pretty average, but St. John's 820mm is actually well below average, and Halifax's 746mm is its 2nd lowest on record.

Across the country the biggest October storms were: 

• 59mm in Ottawa 
• 47mm in Halifax 
• 43mm in St. John's 
• 39mm & 38mm in Montréal

Snow Across Canada

Calgary was the only city in our list to record any snow in October. They average 11cm, but in 2025 they only got 1cm.



November

For November, we average around 18 Highs above 0°C, but we also start seeing lows of -10°C or -15°C. -20°C even shows up sometimes, like in 2022, and 2010-2015. 2014 got down to -29.8°C.

Over the next few months our average High drops from 5°C down to around -7°C at new years, and spends a bunch of the winter around -4°C. 

The average Low drops from -3°C to -16°C, and spends a bunch of the winter around -13°C.

September 2025 Review

It's time for our big look back at Edmonton weather for a hot September 2025.

September 2025's average High of 23.8°C was the 2nd warmest on record, just behind 24°C from 1938. 

The average Low of 8.8°C was the 4th warmest. For recent years that joins 2024's 2nd warmest 9.2°C, and 2022's record of 9.4°C.

Even though September 2025's Highs and Lows weren't #1 individually, combined they made this the warmest September on record. For 2025 that joins our 5th warmest August, and 6th warmest May.

In recent years we've had:

• #1 May in 2023, #6 in 2025
• #1 June in 2021, #3 in 2023
• #1 July in 2024, #3 in 2023, #6 in 2022
• #1 August in 2022, #5 in 2025
• #1 September in 2025, #3 in 2022, #5 in 2024
• #1 October in 2022
• #1 December in 2023

The 5 months that haven't gotten new #1s since 2021 are January-April, and November.




High Temperatures

September 2025 was warm, with only 1 High below average (just barely) on the 24th. Most of the month was well above average, including 2 new daily records on the 13th and 20th.

September averages around 11 20°C Highs, and 2025 had...24? Yup, 24. 

That included 12 25°C Highs, when the average is around 3. 

There were no 30°C days, but it did have 3 29°C Highs on the 12th, 13th & 20th.

The coldest High was 15.9°C. September averages 8 Highs below 15°C.





Hot Days So Far

We're getting to the end of our hot days, and 2025 will likely end up with 14 30°C Highs, which ties 1961 for the 3rd most on record (behind only 2024 & 2021). 

And 2025's 56 25°C Highs is the 5th most on record, and the most since 1961 (1898's record is 64).



Low Temperatures

September's Lows were also mostly well above average, but did include 6 below-average days. But there were also 3 new daily records on the 14th, 17th & 18th.

September averages 6 Lows above 10°C, and 2025 had 13. 

It also averages 1 below-freezing Low, but 2025 was frost-free. The last time that we had a September frost was back in 2019.



2025 Records

So far 2025 has set 8 new daily record Highs. That's below 2024's 11, but above the 5 from 2021-2023. 

And 2025 has 6 record warmest-Lows. That's more than a lot of years, but 2021-2024 all ranged from 10-15.



Early Frost History

This shows Blatchford's history of early frosts, counting the 0°C Lows which occurred each year before October.

Right now we've gone 6 years without a September frost. The longest gap on record was 7 years from 1975-1981.

Around town, the airport did get its first frost on September 25th, which is about 2 weeks later than its average. And Campsie's September 5th frost was right on its average.



The Horserace

With 3 months left in 2025, its average temperature is currently our 5th warmest overall, at 2.1°C above the 20th century average.

That's due to a warm January (#13), May(#6), August (#5), and September (#1). 

The Highs are our 4th warmest, and Lows are 9th warmest.



Warm & Cold Months

September 2025 was well above average, so it's a big orange bubble here. The average High of 23.8°C was 6.9°C warmer than the 20th century average. The average Low of 8.8°C was 4.2°C warmer.



Across Canada

September 2025 another above-average month across the country. Edmonton was at the top at 6.9°C warmer than the 20th century average. Victoria was at the bottom, at 0.4°C warmer than theirs.



Precipitation

In September we average 32mm of precipitation, and 2025 was SUPER low.

The airport recorded 0.6mm (although it had quite a few missing records), Blatchford got to 0.9mm, and Stony Plain had 1.5mm.

Campsie (100km NW) got up to 13.3mm, but that's still well below average.

By the end of September we average around 377mm of precipitation for the year.

The dry September means that Campsie and the airport are a bit below average around 350mm.

But Stony Plain is way down at 267mm, and Blatchford is down at 250mm.

Storms? What storms? By September our big summer storm season is over, but we still average around 10 days with Precipitation. But not in 2025.



Snow

On the other hand, no September precipitation also means no September snow. The last time that we recorded September snow was September 28, 2019 in Stony Plain. And September 2018 was also very snowy.



Precipitation Across Canada

These are the precipitation totals for 2025 across the country.

Quebec City is still way out ahead with over 865mm. Montréal & St. John's are over 700mm. 

And like Edmonton, Calgary recorded basically no precipitation (0.4mm) in September.

Across the country the biggest September storms were: 

• 50mm in Regina
• 38mm & 23mm in Toronto
• 25mm in Quebec City
• 20mm in Charlottetown

October

For October, we average about 1~2 Highs of 20°C, but half of the time there are none.

October also averages 2 Highs below 0°C, and 14 freezing Lows. 

And...we get 7cm of snow on average in October, although 2021, 2022 & 2024 had none.

August 2025 Review & The Great Heatwave of August 2025

It's time for our big look back at Edmonton weather for August 2025. August has 31 days, but we're going to talk a lot about the final week. The word "unprecedented" gets thrown around a lot, but the end of August gave us a truly unprecedented heatwave.

August 2025's average High of 25.7°C was the 4th warmest on record. That's obviously hot, although recently 2022 got to 2nd spot with 26.6°C.

The average Low of 12.9°C was the 9th warmest. And again, that's warm. But it was actually below 2024, 2023 & 2022.





High Temperatures

August 2025 started warm, but then was maybe a little cool for a few weeks. 

But it ended with 8 straight 28°C Highs, 8 of which got to 30°C, and 4 of which got to 32°C. 

Overall there were 8 below-average Highs compared to 21 above-average, including 4 new records.

August averages around 10 25°C Highs, and 2025 had 19. 

That included 8 30°C Highs, when the average is around 1. 

The hottest was 33.3°C on the 27th. The coldest was 13.1°C on the 15th.





The Great Heatwave of August 2025

So what made this heatwave unique?

Our 30°C season can last from May-September, but it peaks in mid-July. From around June 22-August 18 is when we're most likely to reach 30°C. By August 25 we can still get there, but we're definitely out of the peak time.





Hot Days In-A-Row

The August heatwave gave us 6 30°C Highs in-a-row. That's the longest for this late in the year, and is 1 short of the all-time record set in July 2024 and July 2021. For late-August the previous record was only 3, and 2025 doubled that.

The August heatwave also gave us 4 32°C Highs in-a-row. That ties the all-time record from July 2021 and June 1961. And it also doubles the previous late-summer record, which was only 2 in-a-row.





Record Highs

We set 4 new record Highs in-a-row, from August 26th-29th. Those ranged from 32.2°C to 33.3°C, and were the 4th, 6th, 8th & 9th warmest temperatures ever recorded this late in the year.

Overall, 2025 now has 6 new record Highs. That's fewer that 2024's 11, but more than the 5 for 2021-2023. 

Just for the summer months of May-September, since 2021 we've set 29 new records, or about 20% of all of the days.





Hot Days So Far

The previous August record for 30°C days was 7, in 1967 & 1932. But 2025 sets a new record with 8. 

August 2025's 4 32°C days is also a new record, ahead of 3 in August 2008 & 1981. The 2 33°C days also tie 1922's record.

At the end of August, so far 2025 has had 14 30°C days. That ties 1964 for 3rd most ever recorded.

The only years with more? 2024 had 16, and 2021 had 17. (and with the forecast for September, we might catch them?)



Low Temperatures

And the Lows? Compared to the Highs they were a bit boring. For other recent heatwaves we had a lot of record-setting Lows, but August 2025 was warm without being flashy. 21 Highs were above-average and 10 were below.

August averages 4 Lows over 15°C, and 2025 had 7. But those were all early in the month. During the big heatwave dropped to around 12-14°C overnight.



The Horserace

How does the heatwave affect 2025's overall temperatures?

The mean temperature was already around top-20, and 1.5°C warmer than the 20th century average. 

August's hot week is visible here with the red line climbing upwards at the end, to around 13th warmest overall.



Warm & Cold Months

August 2025's average High of 25.7°C was 3.7°C warmer than the 20th century average, so it gets a medium orange bubble. But 2022 was warmer overall.

The average Low of 12.9°C was 3.3°C warmer also gets a medium orange bubble, similar to 2022-2024.



Across Canada

August 2025 another mostly above-average month across the country...except for Winnipeg. 

Kelowna & Edmonton were at the top, with Highs more than 3.7°C above their 20th century averages. 

Winnipeg was at the bottom, and -0.2°C below theirs.

One of the weird quirks of Edmonton's recent heatwaves is that this is the 2nd summer in-a-row where we've had as many (or even more) 30°C days than Winnipeg.



Precipitation

August averages 52mm of precipitation, which is our 3rd highest month.

In 2025 Blatchford was down at 28mm, Stony Plain got 44mm, the airport got 61mm, and Campsie (100km NW) got up to 114mm.

The big difference between the stations was the Blatchford's biggest day was only 11mm. The airport had 2 days around 15mm, and Campsie had 3 over 20mm.

By the end of August we average around 345mm of precipitation for the year (about 80% of our yearly total).

The airport and Campsie are right around average, while Stony Plain is at 266mm, and Blatchford is down at 248mm.



Precipitation Across Canada

These are the precipitation totals for 2025 across the country. Quebec City is still way out ahead with over 800mm. Montréal, St. John's & Halifax are over 600mm. Calgary is at 423mm, while Edmonton and the other prairie cities (also Kelowna & Victoria) are below 250mm.

Across the country the biggest August storms were: 

• Halifax & Vancouver over 40mm 
• Ottawa around 35mm 
• Quebec City, Toronto & St. John's around 25mm

September

For September we average 11 days at 20°C, including 3 at 25°C. And 2024 & 2022 both started with heatwaves.

For Lows, about half of the time September is frost-free, but right now our last September frost was 2019.