Heating Degree Days for 2023 at Alberni Weather

Heating Degree Days: 1054.9

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Day Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dec 
Totals               0  76.5  226.8  371.6  380 
Day Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dec 
Totals               0  76.5  226.8  371.6  380
30 0.06.715.115.48.5
31   0.0 13.0 11.1
graph of heating degree days

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This table shows the daily and monthly heating degree days (HDD). Heating degree days are a measure of how much heating is required to maintain a standard temperature in a building.

The rows indicate day of the month with the months shown in the columns. Blank entries indicate that there is missing data or that there is no such date. Values marked with a different colour are calculated using incomplete data. When there are too many missing observations in a day the HDD is computed from the average of the daily extremes. Depending on what data is missing during the day the HDD value computed in this way may be a poor estimate of the real value.

The number of heating degree days is computed by subtracting the daily average temperature from a reference temperature if it is less than the average temperature or is simply equal to 0 HDD if the average temperature is greater than the reference temperature. We use 18 °C as the reference temperature.

For example, a day with an average temperature of 10 °C has 8 heating degree days (HDD), a day with an average of 16.4 °C has 1.6 HDD, a day with an average temperature of 18 °C has 0 HDD. Finally, a day with an average temperature of 21°C has 0 HDD.

The totals shown on this page include all data that we have collected for each station. Annual and monthly totals will be incomplete for stations that came online part way through the year or where data collection didn't occur for some reason.

This page took 61.0 ms to generate.


The Vancouver Island School-Based Weather Station Network is an education first project. Data from the network are made freely available as is to the public with no guarantee of accuracy or availability. Commercial use requires a license. Please contact Ed Wiebe, ecwiebe at uvic.ca for more information. This work (this site and all contents not otherwise attributed) by School-Based Weather Station Network is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
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Last Modified: April 03 2023 13:13:05.