September 2026 Review

It's time for our big look back at September 2026, which was another pretty quiet month.

September 2026 was our coldest September since 2020. But historically that still puts it well above average. 

The average High of 19.3°C was the 30th warmest. 

The average Low of 12°C was 10th warmest. (compared to 100 years ago September's average Lows have increased by 5°C)



High Temperatures

September's Highs basically bounced around the average all month, with a few extra warm days around the 21st. The coldest High was 11.1°C on the 26th, and the warmest was 28°C on the 21st. 

Overall 16 Highs were above-average, and 14 were below.

September averages 12 20°C Highs, and 2026 got 12. 

4 of those might get to 25°C, while 2026 got 6 of them.

2022 & 2024 both had several 30°C Highs, but 2026's warmest was 28°C. 

And September averages 2 Highs below 10°C, but 2026 had none.



Warm Days So Far

We might still see some warm days in October. 

But right now 2026 has had 103 Highs reach 20°C, which is typical nowadays, but the historic average was closer to 90. 

And 38 of those got to 25°C, which is just a bit above average.



Low Temperatures

September 2026's Lows were mostly above average: 19 were above, with 11 below. 

The warmest was 14.6°C on the 2nd. The coldest was 1.4°C on the 15th. So it was another frost-free September for Blatchford.

Blatchford hasn't had a September frost since 2019. Although they used to happen every few years.



First-Frost

Blatchford's average first frost is September 30th, and Stony Plain's is September 25th. But so far they're both frost-free.

The airport & Campsie got their first frosts on the 15th & 13th, which is a little later than their averages of the 10th & 6th.



Warm & Cold Months

September 2026 gets medium orange/warms dots. 

The average High of 19.3°C was 2.4°C warmer than the 20th century average. The average Low of 7.8°C was 3.1°C warmer than the 20th century average.



The Horserace

With 3 months left in the year (and the promise of a super El Niño on the way) 2026's temperatures currently sit as Edmonton's 23rd warmest on record, at 1.48°C warmer than the 20th Century average. 

Recently 2025 & 2024 ended the year as 7th & 10th, while 2023 was 1st.



Across Canada

Across Canada September was cool in the east, and above-average everywhere else. Saskatoon's Highs were 2.8°C warmer than their 20th century average, while Moncton's were 0.8°C below theirs.



Precipitation

In September Edmonton averages 32mm of Precipitation. After the ridiculously rainy summer, September was below average. 

In 2026 Blatchford got 14.4mm, the airport got 21mm, and Stony Plain got 21.7mm.



2026 So Far

By the end of September we average around 382mm of precipitation for the year, but in 2026 the local stations are still well above average. Blatchford is up at 716.8mm, Stony Plain has 571mm, and the airport has 496mm.

716.8mm is Blatchford's 2nd rainiest year on record. It's just 8mm behind 1900's record of 724.8mm. In October we average 18mm, and before the end of the year we average 54mm.



Precipitation Across Canada

Edmonton's 717mm has it well ahead of the other prairie cities, which are all between 350-400mm. But central & eastern Canada are mostly from 800-1000mm, with Halifax close to 1100mm.

For big September storms Halifax led the way with 72.6mm on the 4th. That first week saw 40mm+ storms in Toronto, Halifax, Charlottetown (x2), St. John's, Regina & Saskatoon. Compared to that the rest of the month was pretty quiet.



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 average 7cm of snow in October. Although 2021, 2022, 2024 & 2025 had none.