Local Weather News - 2015

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December 2015 Obs Summary: December was initially a dry month for rainfall across the Blue Mountains, with a number of stormy and showery days not arriving until the second half of the month. The Mount Boyce AWS total (official station 2 km north of town) for this month was 94.6mm, with the long term average being 88.6mm. Our wettest day was on the 23rd with 35.6mm. The average maximum and minimum temperatures were somewhat above the long term average, at 23.7C (1.3C above) and 12.0C (0.5C above) respectively. Our coolest morning was 6.2C on the 4th and our warmest day was 31.6C on the 19th. Our warmest night was 19C on the 21st. Thankfully the handy rainfall that eventually came this month again aided in keeping any serious fire threats at bay.

November 2015 Obs Summary: November was a quite good month for rainfall across the Blue Mountains, with a number of stormy and showery days. The Mount Boyce AWS total (official station 2 km north of town) for this month was 110mm, with the average being 108.6mm. Our wettest day was on the 2nd with 19.6mm. The average maximum and minimum temperatures were somewhat above the long term average, at 21.3C (1.2C above) and 11.4C (1.7C above) respectively. Our coolest morning was 7C on the 9th and our warmest night 22.1C on the 20th. Thankfully the handy rainfall this month aided in keeping any serious fire threats at bay.

October 2015 Obs Summary: October was a very warmth month in the Blue Mountains, record warmth was recorded to some extent. For the monthly averages, Mount Boyce AWS recorded 10.7 (+3.2C above avg) for minimums and and 20.5 (2.7C above avg) for maximums. The average minimum temperature was the warmest recorded in twenty five years of records. Rainfall for October at Mount Boyce was 43mm, which is notably below the long term average of 65.5mm. Katoomba observations, with a longer term record, came in at 11.6C (+3.9C above avg) for minimums which is the warmest in its 51 years of records. Maximum average for Katoomba was 21C (+3.4C above avg).

September 2015 Obs Summary: Using the data from Mt Boyce AWS, September average temperatures were close to the monthly average for minimums and maximums, being 4.8C (-0.6C below avg) and 14.6C (right on average) respectively. Rainfall for the month was 29.4mm which is short of the long term average of 53.6mm. The warmest day was 20.2C on the 13th and the coldest morning was 0.1C on the 23rd. The coldest maximum was 8.2C on the 8th.

August 2015 Obs Summary: It may have felt like a cold August but it has actually turned out to be to right on average for minimum and maximum temperatures although slightly below average for rainfall. Using the data from Mt Boyce AWS, August average temperatures mirrored the long term monthly average for minimums and maximums, being 2.9C and 11.3C respectively. Rainfall for the month was 42.2mm which is just short of the long term average of 55.4mm. The warmest day was 19.3C on the 22nd and the coldest morning was -2.5C on the 4th. The coldest maximum was 5C on the 5th. Remembering that the Mt Boyce AWS only has about twenty years of observations, it was actually a bit warmer than the long term average - about 1C warmer.

July 2015 Obs Summary: Using the data from Mt Boyce AWS, July average temperatures were -1.3C below average for minimums and -0.8C below average for maximums, being 1.4C and 8.7C respectively. Rainfall for the month was 37.4mm which is just short of the long term average of 40.8mm. The warmest day was 12.6C on the 5th and the coldest morning was -1.4C on the 17th. The coldest maximum was 3.4C on the 12th.

NB: The Mount Boyce AWS has less than twenty years of records, so it doesn't reflect the general rainfall deficit in recent decades or the warmer temperatures, when it comes to averages.

June 2015 Obs Summary: Using the data from Mt Boyce AWS, June average temperatures were right on average for minimums and +0.9C above average for maximums, being 4C and 11.1C respectively. Rainfall for the month was 37.8mm which is a little short of the long term average of 55.4mm. The warmest day was 14.2C on the 6th and the coldest morning was -2.3C on the 2nd. The coldest maximum was 6.2C on the 1st.

May 2015 Obs Summary: Using the data from Mt Boyce AWS, May average temperatures were -0.5C below average for minimums and -1.4C below average for maximums, being 5.7C and 12.2C respectively. Rainfall for the month was 66mm which is close to the long term average of 60.8mm. The warmest day was was 17.4C on the 4th and 5th and the coldest morning was -0.7C on the 14th. The coldest maximum was 5.7C on the 13th.

April Obs 2015 Summary: Using the data from Mt Boyce AWS, April average temperatures were -0.3C below average for minimums and -1.5C below average for maximums, being 8.4C and 15.7C respectively. Rainfall for the month was a whopping 313.6mm which is way above the long term average of 62.6mm and a record for this site (19 years worth of records) thanks largely to a very powerful east coast low that developed on the 20th. We also had record 24 hour April rainfall on the 21st with 105.2mm. The warmest day was 23.5C on the 15th and the coolest morning was 4C on the 28th. The coolest maximum was 8C on the 20th. The BoM Katoomba Obs station recorded 398mm for the month.

March Obs 2015 Summary: Using the data from Mt Boyce AWS, March average temperatures were -0.3C below average for minimums and +1.1C above average for maximums, being 11.1C and 21.6C respectively. Rainfall for the month was 53.4mm which is well below the long term average of 114.5mm. The warmest day was 30.4C on the 20th and the coolest morning was 5C on the 27th. The coolest maximum was 12.1C on the 13th.

February Obs 2015 Summary: Using the data from Mt Boyce AWS, February average temperatures were -0.5C below average for minimums and -0.1C below average for maximums, being 12.8C and 22.7C respectively. Rainfall for the month was 148.4mm which is close to the long term average of 136mm. The warmest day was 29.7C on the 8th and the coolest morning was 8.9C on the 3rd. The coolest maximum was 17.7C on the 25th.

January Obs 2015 Summary: Apologies for the late addition of January data, lots of things happening here in my world...Using the data from Mt Boyce AWS, January average temperatures were +0.1C above average for minimums and -0.8C below average for maximums, being 13.4C and 23.3C respectively. Rainfall for the month was 154.2mm which is notably above the long term average of 120.6mm. The warmest day was 30.4C on the 4th and the coolest morning was 7.3C on the 30th. The coolest maximum was 13C on the 28th.


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