Mallacoota weather report June 2020

Overall an unexceptional month.

Rainfall

We were heading for a trivial amount until a very surprising amount on the 24th.  As it turned out we added 23 mm in that event and ended with 41.8 mm for the month.  This is 56% of median rainfall for July.  That is almost identical to 2019.

Doing a pro-rata estimate of the total for the year gives an estimate of 788 mm for the year.  The progress of the daily pro-rata estimates through 2020 is given in this chart.

Temperatures

My usual overall measure of the temperature is the anomaly given by the difference between the current average temperature for a site and period and the long term average for the same site.  Using the BoM site near the airport I get a value of 0.17^oC for this metric.  

I calculate the anomaly each day, on a month to date basis as we move through the month.  For July that shows a warm start to the month followed by a cold spell and a warm recovery to near average conditions.

A similar pattern is (fortunately) shown when looking at the daily data from my weather station.

There did appear to be quite wide ranges in the daily temperatures but neither the maximum range (13.8^oC ) nor the minimum range (5.3^oC ) were close to the extreme widths of range for July.

Minimum Temperatures

All three measures (2020, 2019 and long term average) of average monthly minimum temperature are closely grouped.

Looking at a time series of average minima for June shows quite wide variation and no significant trend.

Maximum temperatures

The average maximum for 2020 is a little above 2019 and a fair amount above the long term average.  I expect this to be an outcome of using my data for the last two years and BoM data for the earlier years.

However a time series shows great variation and no significant trend.  The 'plummet' in 2006 is interesting and may be investigated later.  (As it isn't reflected consistently in other months of that year I don't think it is an artefact of changed equipment or other site changes.)

Humidity

The average 0900 hrs reading for June 2020 is somewhat higher than both June 2019 (both from my WS) and both well above the historical average (to 2010) offered by BoM

In contrast the average 1500 hrs is well below the historic figure and very similar to 2019.

Wind

In essence the data show a rather calm month with an average daily run of 73 kilometres.  There were 12 days with a run <50 kms and only 6 days over 100.  With only 16 months of data for this variable it isn't possible to make furthe comment.

When the wind did blow it was mainly from the West to North sector of the compass.