Tag Archives: climate data

Climate data update

I’ve updated the Sydney temperature and rainfall pages with the latest data from the BOM, we’re pretty much right up to date now, thanks BOM. Something has happened to their sea level pages though, their Fort Denison measurements have not been updated since the end of 2012.

It’s the long term trends that are of most interest so nothing mind blowing in these updates, temperature continues to rise on almost all average time periods. I found it interesting that even after the “August of rain” most rainfall averages are still low when you look back over time.


Sydney’s changing sea level

More data from the BOM, this time I’m plotting their historical tidal measurements along with moving averages over 6 months, 1 year, 5 years, 10 years and 30 years.

Tidal measurements are for Sydney taken from the Fort Denison gauge, the data includes monthly averages for low and high tides and the mean, going back to 1914.

Like the temperature data there are local rises and falls that last 10 years or more, but the consistent long term trend is up.

Click through to have a play with the chart, select the data sets you want and they will be displayed.

sydney sea level
Click through to see Sydney’s changing sea level


Sydney’s Changing Climate

Besides the boring old weather the Bureau of Meteorology website has a lot of pretty cool stuff. Something I’ve been digging into lately is their climate data. Depending on the weather station you can find rainfall, maximum and minimum temperatures going back over 150 years.

I’ve used their temperature data for the Observatory Hill station in Sydney to make a graph over time, I’ve also calculated moving averages over various time periods. It’s turned out some pretty interesting results. There’s a clear warming trend since the early 1900’s for maximum temps and around the mid 1940’s for minimums, but it’s not all smooth, there have been some ups and downs that have lasted over 10 years.

Click through to the interactive graph and have a play, you can turn the various data series on and off to compare. You have to be a bit patient, it can take a few seconds after you click to send through the new data points and graph them.

The change in maximum Sydney temperatures over time
The change in maximum Sydney temperatures over time