Thursday, June 1, 2017

May 2017 Summary


A cool and very wet May

The see-saw monthly temperatures continued in May with much cooler temperatures than the warmth we saw in April.  With a very cold start to the month and only a couple days above 25°C, the final overall temperature was 0.6 degrees below average making it the coldest May since 2009.

But the bigger story was that it just wouldn’t stop raining (well actually it did for a week but that didn’t seem to matter).  The total of 146.2 mm was much more than the average of 82.3 m, this is a lot but not even in the top 5 for the history of measurements in the area.

However, the total for April and May of 270.6 mm was the third highest of all time and not that much behind the record of 286.0 mm back in 1916.  While the total so far for the year of 540 mm is not only well above the average of 340 mm, but is also just below the record wettest first five months of the year (541.6 mm in 2011).


Summary for May 2017:
Maximum Temperature 28.4°C
Minimum Temperature -0.7°C
Average Daily High Temperature 16.7°C (Long term average 18.5°C)
Average Daily Low Temperature 7.0°C (Long term average 6.4°C)
Total Precipitation 146.2 mm (Long term average 82.3 mm)

(Long term averages based on 1981-2010 data for the Waterloo Wellington Airport)

Wednesday, May 3, 2017

April 2017 Summary


A warm and wet April

We saw a bounce back in temperatures with April coming in at two and half degrees above average, this makes it the warmest since 2010.  It was a classic spring weather pattern with some spells of temperatures over 20°C mixed in with days in the single digits.

It was yet another wet month, the total precipitation of 124.4 mm was much more than the average of 74.5 mm, and it was spread out over the month with 5 days over 10 mm.  The total for the year of 393.8 mm is well above the average for the first 4 months of the year which is 264.4 mm.

Assuming the 1 cm of snow that fell in April is the end of the snowfall season, the total will end up at 126.0 cm coming in below the average of 159.7 cm.

Summary for April 2017:
Maximum Temperature 26.1°C
Minimum Temperature -1.4°C
Average Daily High Temperature 14.1°C (Long term average 11.5°C)
Average Daily Low Temperature 3.5°C (Long term average 0.8°C)
Total Precipitation 124.4 mm (Long term average 74.5 mm)

(Long term averages based on 1981-2010 data for the Waterloo Wellington Airport)

Monday, April 3, 2017

March 2017 Summary


A wet March that was colder than February

Somebody better check the calendar because it seems that somebody switched the weather for February and March.  In fact for only the 5th time in the 100 years of records in the region, the average temperature was lower in March than it was in February (the last time this happened was in 1984).

The overall temperature was almost half a degree below average, but this is still within the average range.  However, this was the first time there was an overall temperature that was even a little below the average since April of last year.

It was a wet month with 90.2 mm of total precipitation compared to the average of 61.0 mm.  Interestingly, even with the cooler temperatures, a lot of that precipitation came down as rain instead of snow.  We only got 12 cm of snow compared to the average of 26.5 cm, this brings the total for the season up to 125 cm which is less than the 150 cm average for the end of March.


Summary for March 2017:
Maximum Temperature 17.1°C
Minimum Temperature -15.4°C
Average Daily High Temperature 2.7°C (Long term average 3.6°C)
Average Daily Low Temperature -5.6°C (Long term average -5.6°C)
Total Precipitation 90.2 mm (Long term average 61.0 mm)


(Long term averages based on 1981-2010 data for the Waterloo Wellington Airport)

Saturday, March 4, 2017

February 2017 Summary

The warmest February ever 

In what should not be a surprise to anyone, it was the warmest February that we have experienced in the 100+ years of records in the region.  The first half of the month saw temperatures that oscillated both above and below zero, but it was not until the 18th that the crazy heat came in.  The month ended with 12 days where the high temperature was over zero including some days that were over 15 degrees above the average.

Overall the temperature was 4.4 degrees above average which was almost half a degree more than the previous warmest February back in 1998.  The high of 15.1°C on the 23rd was the highest February temperature we have ever seen in the region, in second place was the 15.0°C which happened the day before.

The precipitation total was 68.0 mm, just enough to put it into the above average range.  Given the high temperatures, it is not surprising that we got about half the average amount of snow during the month (17.5 cm compared to 30.3 cm).  Even though the last 2 months have only seen half the average snowfall, the snowy December means that that the total snowfall of 113 cm is only a little less than the 125.6 cm we would expect at this point in the snowfall season.


Summary for February 2017:
Maximum Temperature 15.1°C
Minimum Temperature -15.3°C
Average Daily High Temperature 3.4°C (Long term average -1.2°C)
Average Daily Low Temperature -5.6°C (Long term average -9.7°C)
Total Precipitation 68.0 mm (Long term average 54.9 mm)


(Long term averages based on 1981-2010 data for the Waterloo Wellington Airport)

Friday, March 3, 2017

2017 Weather Station Contest is on!


The 2017 edition of the UW weather station contest is now on!

Can you guess for the first time the first time the weather station will record a temperature of 20C?

Find out all the details and enter the contest here:

http://weather.uwaterloo.ca/2017_contest/contest.html

Don't delay - you have to enter the contest by Wednesday, March 8th, 2017 at 2:00 pm.