How's the month of June progressing so far?

The first half of June has seen both Sydney and Jyväskylä experience a fairly warm start to the month. The warmth looks set to continue in Sydney, but a cold end to the month is on the cards for Jyväskylä.

The graph below shows the progressive average minimum for Jyväskylä in June during the past 6 years. It's quite interesting to see how the years have been split. 2009, 2010 and 2012 have clearly had lower minimums while 2011, 2013 and, so far, 2014 have been much warmer.

Progressive average minimum for June at Jyväskylä Airport in the period 2009-2014

The 6 days of June 4 to 9 saw minimums above 10C, helping the average climb 3.5C in that time. However, with the way the past week has gone, which included a low of only 1.1C yesterday (the 6th coldest June temperature of the past 6 years), and by looking at current forecasts, it's unlikely that the orange line will continue to remain in the vicinity of the lines of 2011 and 2013.

Jyväskylä started the month with a few days of maximums below 20C, but the same 6 day run mentioned above had an average top of 24.4C, causing the monthly average to climb almost 5C. It has been dropping for just over a week now though. Based on current forecasts 2014's average maximum could possibly end up the lowest of the past 6 years.

Progressive average maximum for June at Jyväskylä Airport for the period 2009-2014

In Sydney, minimums at the start of the month have been fairly similar to previous years. It wasn't until the end of last week and the continuation of minimums above 10C when 2014 pushed towards the top, now only below 2013. It's also interesting to see where the long term average lies, far below figures from the past 6 years.

Progressive average minimum for June at Sydney Airport for the period 2009-2014 plus the long term average

The average maximum for Sydney so far this June is also holding steady as one of the warmest. Including today, this month has already seen 8 days with a maximum above 20C. Only 2013 saw more since 2009 with 10. 2010 didn't have any days above 20C. 2013 still holds the edge for now as shown in the graph, but a 10 day run from June 16 last year saw an average high of only 15.5C, the coldest 10 day period throughout all of last year.

Progressive average maximum for June at Sydney Airport for the period 2009-2014 plus the long term average

Based on current predictions, it doesn't look like something similar to that will be happening this June. Forecasts for the next week show relatively warm highs between 19C and 22C.