Alberniweather and Port Alberni Summary for May 2023

Story of the Month - Incredible Heat!

The featured image is a map of air quality stations across North America as smoke from fires in Canada poured into the USA early in June.

Apologies for the delay in getting this summary out. The Cameron Bluffs wildfire took over. But at long last, here is the May 2023 Summary. It is appropriate that this summary was delayed by a historic wildfire that has blocked off Port Alberni and the West Coast because it was an unprecedented and historic month of May that set the conditions for that wildfire.

In terms of Environment Canada stations:

1) Port Alberni set four all time daily high temperature records for the month of May including the highest Environment Canada May temperature ever recorded in Port Alberni: 36.0ºC at Robertson Creek. 

2) At 34.3ºC the Airport was only 0.8ºC away from also breaking the highest ever previously recorded in the month.

3) The overall mean temperature for the month was 15.73ºC. The highest ever recorded.

4) The overall average maximum temperature was 23.79ºC at the Airport just 0.12ºC away from the highest ever recorded.

5) Rainfall wasn’t zero. But it was close. We only had one day of significant rainfall.

In the City, Alberniweather and all of the City based Personal Weather Stations recorded average minimum temperatures of around 10ºC.  These are, again, the highest ever recorded in May and continues a long trend of rising minimum temperatures in both City/Harbour and Valley stations.

Obviously with all of these records we would expect to have averages higher than normal, and we did. Maximum temperatures at the Airport were over 5ºC above normal. In the City, they were over 6º. Minimums were more than 2ºC above normal at the Airport and over 4º in the City.  These are truly stunning numbers. A normal “higher than normal” result would be 2 or 3º. Not 4 or 6.

All of these records had a huge impact on the forests as they dried out much earlier than normal and have led to the early start to the fire season.

Check out the stats and graphs below to see for yourself this month at the various Valley stations and see it compared to our full 120yr history of record keeping in the Alberni Valley.

 

 

 

Day Records Set this Month

Set at Airport* since 1994 and compared to Valley stations** for all time.
(since 1895 for rain, 1900 for temperatures, 1980 for snow on ground)

We set multiple heat records. The Airport set 6 new daily records in total including tying the historic all time high on May 14 and beating the historic all time high on May 15. However, the Airport was second to Robertson Creek station on the 13th, 14th, 15th, and 17th as Robertson set All Time records for the area.

This Month's Graphs from Historic Alberni Valley Weather Stations

Combining Environment Canada and other Personal Weather Stations

Latest values on the far right, click to enlarge/download.

May Maximum Monthly Temperatures in Port Alberni since 1900 as of 2023 - A record high year after a near record low last year.
May Maximum Monthly Temperatures in Port Alberni since 1900 as of 2023 - A record high year after a near record low last year.
May Minimum Monthly Temperatures in Port Alberni since 1900 as of 2023 - Just above average.
May Minimum Monthly Temperatures in Port Alberni since 1900 as of 2023 - Just above average.
May Rainfall in Port Alberni since 1900 as of 2023 - Very low.
May Rainfall in Port Alberni since 1900 as of 2023 - Very low.
May Mean Temperatures in Port Alberni since 1900 as of 2023 - Another in a series of Record highs since 2000.
May Mean Temperatures in Port Alberni since 1900 as of 2023 - Another in a series of Record highs since 2000.
May Average Maximum Temperatures in Port Alberni since 1900 as of 2023 - A record high value again since 2000.
May Average Maximum Temperatures in Port Alberni since 1900 as of 2023 - A record high value again since 2000.
May Average Minimum Temperatures in Port Alberni since 1900 as of 2023 - A record high again.
May Average Minimum Temperatures in Port Alberni since 1900 as of 2023 - A record high again.

City Values Compared to Normal

Please shift your phone to landscape/horizontal to see the table.

  Extreme (ºC) Average (ºC) (mm) Wind (kph)
Location Max Min Min Mean Max Rain Dir Speed Day
Alberniweather 35.4 4.9 10.0 16.4 23.8 13.7 SE 53.1 4
Alberni Elem NA NA NA NA NA NA NA NA NA
Maquinna Elem NA NA NA NA NA NA NA NA NA
Dave’s (Uptown) 36.6 4.7 10.0 16.6 25.0 22.6 NA 22.5 20
Nick’s (South Port) 32.3 5.1 9.9 15.9 22.9 12.8 NA 12.9 14
Kitsuksis (North Port) 36.4 3.7 9.2 15.9 24.2 16.3 NA 25.1 29
 
Combined City 36.6 3.7 9.8 16.2 24.0 16.4  SE  53.1
May Normal
(Somass)
1971-2000
    5.6 11.7 17.7 75.0      
Difference from Normal     +4.2 +4.5 +6.3 -58.6
(22%)
     

Extreme Day

34.1 -2.8       49.2   45  
  Max Min Min Mean Max Rain (mm) Dir Speed Day
  Extreme (ºC) Average (ºC)   Wind (kph)
 
Days of Rain >=0.2 mm >=5 mm >=10 mm >=25 mm
Normal 14.6 4.8 2.3 0.33
This Month
(Alberniweather)
3 1 1 0

Official Airport and Robertson Creek Environment Canada Stations Compared to Normal

Please shift your phone to landscape/horizontal to see the table.

  Extreme (ºC) Average (ºC) (mm) Wind (kph)
Location Max Min Min Mean Max Precip Dir Speed Day

Port Alberni Airport

34.3 2.6 7.7 15.7 23.8 17.0 ESE 36 20

Robertson Creek

36.0* 4.0 8.2 16.5 24.8 18.2 NA    
 
May Normal
(Robertson Creek)
1971-2000
    5.5 11.9 18.3 123.7      
Difference from Normal
(from Airport)
    +2.2 +3.8 +5.5 -106.7
(14%)
     

Extreme Day

35.0 -2.2       83.9   NA  
  Max Min Min Mean Max Rain (mm) Dir Speed Day
 *New Extreme for Month        
 
Days of Precipitation >=0.2 mm >=5 mm >=10 mm >=25 mm
Normal 14.3 5.1 2.8 0.4
This Month
(Airport)
5 1 1 0

* May have used backup Environment Canada Data source at WeatherStats.ca for Missing Data

** Short Term means since 1994 at the new AVRA Airport. Airport Records are compared to the 30+ year weather stations of record since 1900 (1895 for rain) at Beaver Creek, Port Alberni “City” and Robertson Creek.  Note that records pre 1950 may be more likely to over-estimate high temperatures.