The figure of 4.333 thousand km3 must be an error.

My score is 42 in this case. Monthly average is 4.333. All daily values are below monthly average for some reason.

PIOMAS makes public several values:

- On their monthly comment, they release a rounded monthly value.

- They also publish a table with the monthly average, with an exact figure.

- They also publish a list of daily values.

- Finally, Wipneus has access to the daily values by region, that he makes public on ASIF.

For September 2020, PIOMAS published a rounded figure of 4,300 km

^{3} and the exact value of 4,333 km

^{3}. I agree with Gerontocrat that these values have a mistake. As Aluminium says, all daily values are below the official monthly average.

The average of daily values changes a little, depending on the way you handle the leap years. On these average and on the graph, I established that the day 244 corresponds to September 1

^{st} and the day 273 corresponds to September 30

^{th}, with no special handling for leap years. The average are the followings:

Year PIOMAS

Sept. Avg.

(1000 km

^{3})

2011 4.485

2012 3.789

2016 4.533

2019 4.196

2020 4.162

So, 2020 is a little lower than 2019. Considering that PIOMAS is a model that cannot give you an exact figure, I will say that -based on the PIOMAS daily values- 2020 is even with 2019 and the correct average is 4.16 thousand km

^{3}. I do not agree that 2020 is the third lowest, as it is said on the PIOMAS September comment.

So, from my point of view, the winner bins are 3.75-4.25 and 4.00-4.50 thousand km

^{3}. There were 21 votes on those bins, of the total of 63 votes, which represent one third of the votes.

If we consider the 4,333 km3 value, the winner bins are 4.00-4.50 and 4.25-4.75 thousand km3. There were 9 votes on those bins, which represent 14.3% of the votes.