Tag Archives: NSW

Frosty Dry September 2012

Posted in Manilla NSW, Monthly weather by

The daily weather logWeather log September 2012.

The severe frost of -2.7° on the 2nd was the coldest September night on this 14-year record. Having ten frosts in the month had not happened before, either. Most were “black frosts” because there was no dew to freeze. The extremely low Dew Point of minus 7.4° on the 2nd has been exceeded only once: minus 9.3 on 17/5/11.
With such dry air, two of the sunniest days had maximum temperatures more than 25° above the night-time minima.
Rain showers occurred on 5 days (normal), but the total was only 20.4 mm.

 Comparing September monthsClimate September 2012.

Days (24.0°) were 0.2° warmer than average, and nights (5.8°) were 1.2° colder than average.
The mean Dew Point of 0.8° is a new record low-humidity value for September, beating last year’s value of 1.7°. Low humidity brought less September cloud than in the last four years.
The low rainfall of 20.4 mm is in the 29th percentile for September. While the 12-month rainfall total to date is still extremely high (over 900 mm), the 2-month total (31 mm) is now a serious rainfall shortage, in the 9th percentile of 2-month totals.

Data. Rainfall data is from Manilla Post Office, courtesy of Phil Pinch. Temperatures, including subsoil at 750 mm, and other data are from 3 Monash Street, Manilla.

 

Extremely Dry Air in August 2012

Posted in Manilla NSW, Monthly weather by

The air in August was drier than in any month on this 14-year record. Relative humidity in the afternoons was only about 25%, well below the usual 37%. The air has been very dry here for more than a year. The record rainfall last spring may have prevented serious bush-fires, but this year could be different.

The daily weather logWeather log August 2012.

Days were not very warm or cold. Most nights were cold, with 18 frosts (usually 15). Two frosts were severe (below minus 3°), but there was also one night as warm as 12.8°.
Extremely low Dew Points (dry air) of minus 5.8° were recorded on the mornings of the 8th and 16th. Only seven lower values have occurred in 14 years.
The only rainfall (11.0 mm) was recorded on the 24th.

 Comparing August monthsClimate August 2012.

The monthly mean temperature was a bit low, while the mean night-time minimum was very low: 1.9°, not quite as low as the 1.6° of August 2008. The mean early morning Dew Point (-2.0°) was a new record low humidity for any month, beating easily the drought month of July 2002 (-1.4°).
Thirty-nine percent cloudy mornings is a retreat from the August record of 55%, set in 2008 and 2011.
The rainfall of 11.0 mm is very low, in the 15th percentile for August. While the 12-month rainfall total to date is still extremely high (1 metre), the 6-month total is now low (236 mm).

Data. Rainfall data is from Manilla Post Office, courtesy of Phil Pinch. Temperatures, including subsoil at 750 mm, and other data are from 3 Monash Street, Manilla.

 

Very Wet July 2012

Posted in Manilla NSW, Monthly weather by

The daily weather logWeather log July 2012.

As in June, most weather features in July were normal, except for very warm nights with the heavy rain in the second week. Sixteen mornings were frosty, one down to minus three degrees. There were several early fogs in the valley.
Of seven rain readings, most were heavy. But the 29.6 mm value included three days.

 Comparing July monthsClimate July 2012.

Other than rainfall, there is only one variable that is not on the July average: the subsoil temperature at 750 mm is again extraordinarily warm, at 16.9°, 3.2° above normal.
The rainfall total of 91.4 mm is in the 94th percentile. Only eight July months have ever been wetter. However, July 1984, at 171 mm, was nearly twice as wet. The 12-month total to the end of July (1020 mm) is extreme. In the last 50 years, only three 12-month totals have been higher: September and October 1998 and February 1984.

Data. Rainfall data is from Manilla Post Office, courtesy of Phil Pinch. Temperatures, including subsoil at 750 mm, and other data are from 3 Monash Street, Manilla.

 

Normal Weather in June 2012

Posted in Manilla NSW, Monthly weather by

The daily weather logWeather log June 2012.

Most weather features in June were normal.: much the same as last year and the year before. Even the frosts were normal. Eleven mornings were frosty, 7 below zero, and 2 below minus 2° (averages: 13, 8, and 2). The coldest morning, Sunday the 24th, was -4.0°. There were several early fogs in the valley but only that on the 24th stayed after 9am.
There were 8 rain days, the highest reading being 21.0 mm on the 3rd.

 Comparing June monthsClimate June 2012.

There is only one variable that is not on the June average: the subsoil temperature at 750 mm is extraordinarily warm, at 18.3°, 3.0° above normal.

The rainfall total of 45.8 mm is within 2 mm of the average (44.3 mm) and in the 60th percentile. Among totals for more than one month, only the 2-, 3-, and 4-month totals are below the median.

Data. Rainfall data is from Manilla Post Office, courtesy of Phil Pinch. Temperatures, including subsoil at 750 mm, and other data are from 3 Monash Street, Manilla.

 

Very dry air in May 2012

Posted in Manilla NSW, Monthly weather by

The daily weather logWeather log May 2012.

Most days were fine, and only two or three were cool and overcast. There were 13 frosts, twice the usual number, but May 2006 had 14. Rain totalling 13.8 mm fell on five rain days, with a maximum reading of 6.2 mm on the 25th.

 Comparing May monthsClimate May 2012.

This was a very dry month, marked by dew points four degrees below normal, but it was not as dry as May 2006, as is clear from the graph.
The rainfall total is well below the May average of 40.3 mm: it is in the 24th percentile (3/4 of May months have been wetter). In extreme contrast, the nine-month rainfall total of 852 mm is extra-ordinarily high. Only 13 nine-month totals have been higher, and then only in the four years 1890, 1928, 1956 and 2012 (April). The record for a nine-month rainfall total was 1030 mm, set in June 1956.

Data. Rainfall data is from Manilla Post Office, courtesy of Phil Pinch. Temperatures, including subsoil at 750 mm, and other data are from 3 Monash Street, Manilla.