Growing degree days

Growing Degree Day Report - May 2020

Prepared by: 
Brad Estergaard
Date: 
May, 2020

Attached is the May 2020 GDD Update for Summerland and Osoyoos.

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Location: 
Summerland and Osoyoos
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Prepared by:
Brad Estergaard
Date:
April, 2020

Attached is the April 2020 GDD Update for Summerland and OsoyoosAttached is the April 2020 GDD Update for Summerland and Osoyoos

Prepared by:
Brad Estergaard
Date:
October, 2019

Attached is the October 2019 GDD Update for Summerland and Osoyoos.  This is the final GDD update for the 2019 growing season.

Prepared by:
Brad Estergaard
Date:
September, 2019

Attached is the September 2019 GDD Update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
August, 2019

Attached is the August 2019 GDD Update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
July, 2019

Attached is the July 2019 GDD Update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
June, 2019

Attached is the June 2019 GDD Update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
May, 2019

Attached is the May 2019 GDD Update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
April, 2019

Attached is the April 2019 GDD Update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
October, 2018

Attached is the October 2018 GDD Update for Summerland and Osoyoos.  This is the final GDD update for 2018 but Grape Variety Bud Hardiness reports will begin again soon.

Prepared by:
Brad Estergaard
Date:
September, 2018

Attached is the September 2018 GDD Update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
August, 2018

Attached is the August 2018 GDD Update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
July, 2018

Attached is the July 2018 GDD update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
July, 2018

Attached is the July 2018 GDD update for Summerland and Osoyoos.

Prepared by:
Carl Bogdinoff and Pat Bowen
Date:
July, 2018

The success and growth of the grape and wine industries in British Columbia and Ontario are largely due to the production of premium quality wines made from noble Vitis vinifera cultivars such as Chardonnay, Merlot and Pinot noir. This success has spurred efforts to expand the Canadian grape and wine industry to new regions in these and other provinces, but climate is the main constraint on acreage expansion for production of V. vinifera cultivars. Sustainable production of V. vinifera requires sufficient growing-season heat, a long frost free period, and winter temperatures that rarely dip to below bud-lethal (< -22 °C) or vine-lethal (< -25 °C) levels.

Historical weather data can be used to assess climatic suitability for grape growing. Using data from Environment Canada (https://weather.gc.ca/) we produced summaries of the historic climate characteristics for a selection of Canadian V. vinifera growing locations: Osoyoos, Summerland, Abbotsford and Duncan, BC, Vineland, ON, and Kentville, NS. Indices derived from the data include growing degree days (GDD, base 10 °C), consecutive frost free days (FFD), annual minimum temperature, and daily record low temperature for periods spanning the past quarter to half century.

Prepared by:
Brad Estergaard
Date:
July, 2018

Attached is the June 2018 GDD Update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
May, 2018

Attached is the May 2018 GDD Update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
April, 2018

Spring has finally arrived.  Attached is the April 2018 GDD Update for Summerland and Osoyoos.Spring has finally arrived.  Attached is the April 2018 GDD Update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
October, 2017

Attached is the October 2017 GDD Update for Summerland and Osoyoos.  This is the final GDD update of the 2017 season, hope everyone had a great harvest.

The gears are switching and Grape Bud Winter Hardiness testing for the Winter 2017-2018 season will commence soon.

Prepared by:
Brad Estergaard
Date:
October, 2017

Attached is the September 2017 GDD Update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
September, 2017

Attached is the August 2017 GDD Update for Summerland and Osoyoos.

Prepared by:
Brad Estergaard
Date:
August, 2017

Attached is the July 2017 GDD Update.  Summerland had its highest July GDD accumulation of all the included years (1998-2017).

Prepared by:
Brad Estergaard
Date:
January, 2017
Prepared by:
Brad Estergaard
Date:
June, 2017

Attached is the May 2017 GDD Update.

Prepared by:
Brad Estergaard
Date:
April, 2017

Attached is the April 2017 GDD Update.  Looks like a lower than average start to the year, very different than last year.

Prepared by:
Brad Estergaard
Date:
September, 2016
Prepared by:
Dr. Pat Bowen
Date:
July, 2016

Attached are growing degree day (GDD) updates for July 2016 for Summerland and Osoyoos.

Prepared by:
Dr. Pat Bowen
Date:
September, 2015

Attached are updated GDD charts for Summerland and Osoyoos to end of Sep (1998 to 2015).

Prepared by:
Dr. Pat Bowen
Date:
August, 2015

Attached are updated GDD charts for Summerland and Osoyoos to end of Aug (1998 to 2015), plus full-season data for 1958 (hottest season on record) in Summerland for comparison.

Prepared by:
Dr. Pat Bowen
Date:
August, 2015

Attached are updated GDD charts for Summerland and Osoyoos to end of July (1998 to 2015), plus full-season data for 1958 (hottest season on record) in Summerland for comparison.

Prepared by:
Dr. Pat Bowen
Date:
June, 2015

Attached are updated GDD charts for Summerland and Osoyoos to end of June (1998 to 2015). Toasty!

Prepared by:
Dr. Pat Bowen
Date:
June, 2015

Attached are the GDD charts for Summerland and Osoyoos to end of May (1998 to 2015).

Prepared by:
Dr. Pat Bowen
Date:
April, 2015

Attached are the usual April GDD charts for Summerland and Osoyoos (1998 to 2015), plus bonus charts for March (2013-2015).

Prepared by:
Dr. Pat Bowen
Date:
October, 2014

October GDD and summary for 2014, attached

Prepared by:
Dr. Pat Bowen
Date:
September, 2014

Attached are the GDD updates to end of September for Summerland and Osoyoos.

Prepared by:
Dr. Pat Bowen
Date:
July, 2014

Attached are the GDD updates to end of July.

Comments from Brad Estergaard "Summerland is still as MEAN as MEAN can be". Osoyoos continues to move upward with the 2nd hottest July, beaten only by 1998.

Prepared by:
Dr. Pat Bowen
Date:
July, 2014

Attached are the GDD updates to end of June. Note we have added a cleaner cumulative GDD chart showing for comparison only the coolest and warmest years (1999 and 1998), recent 10-yr average, and last year.

Cheers,
Pat Bowen

Prepared by:
Dr. Pat Bowen
Date:
May, 2014

Attached are the accumulated Growing Degree DaysGDD updates to end of May for Summerland and Osoyoos.

Prepared by Dr. Pat Bowen, Research Scientist, Viticulture

Pacific Agri-Food Research Centre, Agriculture & Agri-Food Canada, Summerland, BC  V0H 1Z0

Prepared by:
Dr. Pat Bowen
Date:
May, 2014

Attached are the growing degree days for April 2014 for Summerland and Osoyoos.

Prepared by:
Pat Bowen, Pacific Agri-Food Research Centre, Summerland, B.C
Date:
July, 2012

GDD update for July 2012. Please download file.

Prepared by:
Pat Bowen, Pacific Agri-Food Research Centre, Summerland, B.C
Date:
January, 2008

The graphs include Growing Degree Day accumulation, total monthly Growing Degree Days and Frost Free Days.

Prepared by:
Dr. Pat Bowen - Pacific Agri-Food Research Centre, Summerland
Date:
September, 2012

Attached are the Growing Degree Days updates to the end of September for Summerland and Osoyoos (1998-2012). September was lovely but total GDD for the month was not as high as it seemed – daytime maxima were high but nighttime minima were near normal.

Prepared by:
Dr. Pat Bowen
Date:
October, 2012

Attached are the GDD updates to end of October – final for this year.

FYI, average total GDD for 1998-2012:  Summerland – 1305, Osoyoos – 1535.  We were a wee bit above the average for the timespan.

Prepared by:
Dr. Pat Bowen
Date:
May, 2013

Attached are the GDD updates for Summerland and Osoyoos. New graphics show cumulative GDD to end of May.

Prepared by:
Dr. Pat Bowen
Date:
July, 2013

Attached are the growing degree days from Summerland to Osoyoos for the month of July.

Prepared by:
Dr. Pat Bowen
Date:
August, 2013

Attached are the GDD updates to the end of August for Summerland and Osoyoos.

Prepared by:
Dr. Pat Bowen
Date:
September, 2013

Attached are the GDD updates to the end of September for Summerland and Osoyoos. 

Prepared by:
Dr. Pat Bowen
Date:
October, 2013

Attached are the GDD updates to the end of October for Summerland and Osoyoos.

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