July 2025 Summary

The hottest July in 70 years with average precipitation

With multiple heat waves throughout July and 18 days above 30 degrees, the average temperature was an amazing two and half degrees above average.  This resulted in the month being the fourth hottest in the history of weather records in the region and the hottest since 1955.  There was little relief from the warm temperatures as only a single day had a high that was below average.

After a wet first day of the month there was a week long dry spell.  After that, there were regular storms that came through resulting in a total precipitation of 98.4 mm.  This is above the average of 78.2 mm, but still within the average range.

With the last 6 months all being slightly wetter than average, the total precipitation so far in 2025 of 563.6 mm is getting even more above the average of 503.5 mm.  

Summary for August 2025:

Maximum Temperature 33.1°C
Minimum Temperature 9.6°C
Average Daily High Temperature 29.6°C (Long term average 25.6°C)
Average Daily Low Temperature 16.7°C (Long term average 14.8°C)
Total Precipitation 98.4 mm (Long term average 78.2 mm)

(Long term averages based on 1998-2024 data from the Soulis Memorial Weather Station at the University of Waterloo)

June 2025 Summary

June was very hot month along with average precipitation 

With one of the most extreme heat waves we have seen during June, it not surprising that it was the sixth hottest June in the history of weather records for the region that go back over 100 years.  Overall, it was a little over 2 degrees warmer than the average.

The high of 35.0°C on June 24th was the third highest temperature ever recorded for any month in the 25+ year history of the Soulis Memorial Weather Station at the University of Waterloo.  There were 5 days over 30°C, where on average we get 3 during June and on the other end, the low temperature of 2.4 °C on 2nd was the lowest June temperature since 1998.

The month saw a couple of long dry spells interrupted by a few very wet days, resulting in a total precipitation was 86.0 mm.  This is above the average of 70.1 mm, but still within the average range.

With another close to average month, the total precipitation we have seen in the first half of the year of 425.4 mm is not that far below the average total of 465.2 mm.

Summary for June 2025:

Maximum Temperature 35.0°C

Minimum Temperature 2.4°C

Average Daily High Temperature 27.0°C (Long term average 24.1°C)

Average Daily Low Temperature 13.8°C (Long term average 12.6°C)

Total Precipitation 86.0 mm (Long term average 70.1 mm)

(Long term averages based on 1998-2024 data from the Soulis Memorial Weather Station at the University of Waterloo)

May 2025 Summary

A very average month of May 

A warmer first half of the month was offset by a cooler second half, leading to an overall temperature that was right on the average for the month.  The temperature last went below zero on May 9, which is close to the average date in the history of the Soulis memorial weather station. 

There were a couple of wet days during the month, but nothing out of the ordinary.  The final total was 88.2 mm, the wettest for May since 2019, but still within the average range.  So far the total for the year is 379.2 mm, which is close to the average of 340.2 mm.

Summary for May 2025:

Maximum Temperature 28.0°C
Minimum Temperature -0.9°C
Average Daily High Temperature 18.9°C (Long term average 19.1°C)
Average Daily Low Temperature 7.5°C (Long term average 7.3°C)
Total Precipitation 88.2 mm (Long term average 73.8 mm)

(Long term averages based on 1998-2024 data from the Soulis Memorial Weather Station at the University of Waterloo)

April 2025 Summary

A warm April with one really, really wet day

After a cool start to the month, the second half was somewhat warmer.  The overall temperature was a little over 2 degrees warmer than average, making it the warmest since 2017 and the third warmest in the over 25 year history of the E.D. Soulis weather station.

April 3 will go down as one of the wettest days in the history of the region, starting overnight the precipitation started as a wintery mix before changing over to steady rain that peaked in the late morning.  The total for the day was 78.8 mm, the wettest single day since Jan 11, 2020 when we had 79.6 mm and close to the average for the entire month of 82.3 mm.

The rest of the month was actually pretty dry with the total only being 113.2 mm, higher than average, but 4 of the past 10 years have had higher totals.  Over the first four months of the year there has been 291.0 mm of precipitation, which is a little more than the average of 264.4 mm for this time of year.

We got 2.5 cm of snowfall during April putting the total at 196.5 cm.  This means we are (probably) ending the 2024-25 snowfall season much higher than then the average of 159.7 cm.  

Summary for April 2025:

Maximum Temperature 29.3°C
Minimum Temperature -7.5°C
Average Daily High Temperature 15.2°C (Long term average 11.5°C)
Average Daily Low Temperature 1.4°C (Long term average 0.70°C)
Total Precipitation 113.2 mm (Long term average 82.3 mm)

(Long term averages based on 1998-2024 data from the Soulis Memorial Weather Station at the University of Waterloo)

March 2023 Summary

A very warm March with average precipitation and hardly any snow

There was a 2 week period in the middle of the month with temperatures well above average, outside of that period there were only a few cold days.  This resulted in the overall average temperature to be over 2 degrees above average.  But interestingly, it was still only the fifth warmest March in the past 10 years.

During that mid-month warm period the annual weather station contest ended at 3:45 pm on the 19th when the temperature first hit 20°C. Congratulations to the contest winter Richard Goetz.

Even with the absence of very large storms during the month, there was usually some precipitation every few days.  This resulted in the total for March of 65.2 mm just a tiny bit above the average of 63.6 mm.

The warm temperatures meant that the snowfall for the month was only 3.0 cm, obviously much less than the average of 26.5 cm.  However, for the snowfall season we are at 194.0 cm, compared to the average of a typical season of 159.7 cm.

Summary for March 2025:

Maximum Temperature 20.7°C
Minimum Temperature -17.2°C
Average Daily High Temperature 7.3°C (Long term average 4.2°C)
Average Daily Low Temperature -3.9°C (Long term average -5.5°C)
Total Precipitation 65.2 mm (Long term average 63.6 mm)

(Long term averages based on 1998-2024 data from the Soulis Memorial Weather Station at the University of Waterloo).