Thursday, January 2, 2020

Review of Victoria's Weather in 2019

Victoria was drier and close to normal temperatures in 2019.

The mean temperature at Victoria Gonzales for 2019 was 10.7 degrees C, just very slightly above the 30-year average of 10.6 degrees.

In terms of average temperature, February was the most unusual month of 2019, being more than 4 degrees below normal.  It was the second coldest February on record at Victoria Gonzales, and the coldest since 1936.  October was also a cold month, being 1.2 degrees below the average, and the coldest October since 1984.  On the other other hand, January, May, and December were all more than a full degree warmer than normal in 2019.

The warmest temperature of 2019 came quite early, on June 12.  It was the only day in 2019 to hit 30 degrees or higher.  There were just 6 days in 2019 with daily maximums above 25 degrees, compared with the average of 9 days.  The coldest temperature in 2019 was -5.6 degrees on February 4.  That was the coldest temperature recorded at Victoria Gonzales in more than 5 years.  There were 18 days in 2019 when the temperature went below 0, nearly double the long-term average of 9.5 days.  February accounted for 13 of the 18 days with frost in 2019.

The chart below shows the daily maximum and minimum temperatures at Victoria Gonzales in 2019, compared with the long-term normal temperatures.  You can clearly see the cold snap which covered most of February, but was especially pronounced during the first part of the month.  You can also see the occasional warm spikes, such as 21 degrees in March, 25 degrees in early May, and 30 degrees in mid-June.  There were also some notable cold spikes in October and late November.



Daily Max & Min Temperatures at Victoria Gonzales, 2019

2019 was drier than average in Victoria.  There was 567 mm of precipitation, 87% of the normal 654 mm.  November and March were particularly dry in 2019, with both months receiving less than half of their normal rainfall.  July through September was wetter than normal in 2019, although with this being a dry time of year, it wasn't really that wet.

Thanks to its location in the Olympic Mountain rain shadow, Victoria receives less precipitation than surrounding locations, and 2019 was no exception.   The chart below compares annual precipitation in 2019 in locations around Victoria.  The Victoria Airport recorded 706 mm, 25% more than than Victoria Gonzales.  Vancouver Harbour recorded 1140 mm in 2019, while Seattle Airport received 861 mm.  While Vancouver received about twice as much precipitation as Victoria in 2019, that's actually less than the long term average, which sees Vancouver getting about 2.4 times as much precipitation as Victoria.

Annual Precipitation in Victoria and the Surrounding Region, 2019
The chart below shows daily and cumulative precipitation at Victoria Gonzales in 2019.  You can see that the cumulative precipitation in 2019 (red line) stayed below the average (blue line) for most of the year.  .

Daily & Cumulative Precipitation at Victoria Gonzales, 2019

There were just 111 days with measurable precipitation in 2019, well below the normal of 131 days.  In fact, that was the lowest number since 1987, when there were 105 precipitation days.  The wettest day in 2018 was January 3, with 36 mm.  Despite being a drier than average year, there were 4 days with more than 25 mm of rain in 2019, one more than the long term average 3 days per year.  There were 15 days with at least 10 mm of rain, close to the  normal of 16 days.

Victoria had more snow than normal in 2019, all of it from a snowy period in February.  Victoria received 26 cm of snow in 2019 compared with the long term average of 20 cm.  As mentioned, all of this snow fell in February, when Victoria typically receives less than 4 cm of snow on average.  There were 7 days with measurable snowfall in 2019, again all in February.  This was the most days with snowfall since 2008, and nearly double the normal of 8 days per year.  There was snow on the ground for 7 days in 2019, compared with the long term average of 4.8 days.  2019 saw the most days with snow on the ground in Victoria since 2008.