Friday 24 January 2020

Annual Weather Report for 2019

In summary DRY and warm!

Rainfall

For Angophora Drive I recorded 536 mm for the year.  This is a bit less than the 595.2 recorded at the BoM station near the airport reflecting the tendency for the rain to come in squalls where the falls are rather hit and miss.  Possibly the proximity to the ocean catalyses heavier falls?

Temperatures

The best representation of the overall temperature is the anomaly, defined as the difference between the mean temperature for a period (in this case 2019) and the longer term average.  The anomaly for 2019 comes to +0.5oC, being the balance between warmer maxima (in nearly all months) and close to average minima (6 months were above average and 6 - especially Spring - below).

The mean temperature is trending significantly upwards.

Maximum Temperatures

Above average overall.  Only August and September were below average, with January (+1.6oC) and December (+1.5oC) being particularly warm.  Looking over the period since BoM began recording at the current site in 1994 shows a significant upwards trend.

 Minimum temperatures

Slightly (+0.3oC) above average overall, mainly due to a very warm January (+2.2oC).  As noted above 6 months were above average and 6 below.  In terms of the time series the last two years have been slightly below the trend (which in this case is not significant).

Other Weather data

The BoM has ceased publishing - through Climate Data Online - average humidity and wind data since 2010.  Looking at the monthly data I have gathered it appears that:

  • most months were less humid; and
  • the month to month pattern for wind was broadly consistent with history although the data avaiable is barely comparable!

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