Friday 19 July 2013

June 2013 Summary

In Brief:
Cool by day, warm by night.  Dry and mainly fine weather during the first and last weeks. Unsettled in between with periods of rain and showers.

Temperature: [Minimum]:
The coolest night-time temperature was 10.1 degs C on the night of the 3rd/4th. Since at least 2004, only in 2010 has the minimum temperature not dropped below this level during June.
The highest night-time temperature of the month was 17.1 degs C on the night of the 28th/29th, which was the second warmest June night at this location*.  The warmest June night itself was 17.8 degs C in 2010.  
The average night-time temperature for June 2013 was 13.89 degs C, the highest of the last ten Junes.

Temperature: [Maximum]:
The coolest day of June 2013 was the fine and sunny, though breezy, 4th, with 15.8 degs C.  The last four Junes have seen colder days than this. 
The warmest day of June 2013 was the 29th, with 22.3 degs C, which is the lowest June maximum at this location.*
This gave an average daytime temperature of 19.46 degs C, which is the 8th coolest of the last ten Junes, but the warmest since 2010.
The temperature exceeded 20 degs C on 10 days in June 2013, which is the second lowest number of times at this location.*  In 2011 it happened only 9 times.  The temperature took longer to exceed 20 degs C this year than in any year since 2004, finally doing so on June 7th.
The last time the temperature exceeded 25 degs C in June was in 2010.

Rain:
81.7 mm of rain fell during June 2013, which compares with 129.7 in June 2012, and 94.7 in May 2013.
The wettest individual 'day' was the 8th, with 28.8 mm, however this is misleading as all that day's rain fell by about 9 am during a thunderstorm, and the remainder of the day was fine and sunny.
The next wettest day after that was the 20th, [9.1 mm], with the 22nd [9.0 mm], 17th [7.8], 12th [7.0 mm] and 11th [5.2mm] being the only other days with over 4 mm of rain. 
All the month's measurable rain fell from the 8th to the 23rd. There were 15 completely dry days, and 17 with no measurable rain.
Cumulatively, 537.9 mm of rain has fallen during the first half of 2013, compared with 490.9 mm in the same period in 2012. 

Thunder:
Thunder was prevalent on the morning of the 8th during a 3 to 4 hour intense thunderstorm.

* Since at least 2004.

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