Rain came back in November 2013

The daily weather logWeather log November 2013

By November the 11th, there had been only 70 mm of rain since the deluge in June. The humidity had been getting lower by the month. From that day, rain and high humidity returned. Days and nights became cooler than normal, with more cloudy skies. Most of the seven wet days were showery, but the 29th had steady rain.

Comparing November monthsClimate November 2013.

The weather change on the 11th returned most monthly average values closer to normal. However, despite the rain, this was still an “Arid” month, with a record low November mean morning dew point, a wide daily temperature range, and few cloudy mornings. The mean subsoil temperature (23.8°) was 1.9° above normal, exceeded (in the 21st century) only by 24.7° in November 2002.
The total rainfall of 95.6 mm was in the 80th percentile, well above the average of 67 mm. This disposes of all serious shortages in rainfall totals. The worst figure now is the 5-month total of 166 mm, which is 56 mm below normal (19th percentile).


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.

June 2013: Extreme Cloud and Rain

The daily weather logWeather log June 2013.

The first weeks were warmer than usual, including a Queen’s Birthday Saturday that reached a pleasant 23°. In contrast, Tuesday the 25th reached only 9.7° making it the fifth coldest day of the century.

There were hardly any sunny mornings in the month, and most were close to overcast. Cloud kept the nights warm, limiting the number of frosts to only eight. The night of the 7th had a minimum of 12.6°, nine degrees above normal.

The wettest of 10 rain days had 38.0 mm, almost as high as a 38.2 mm reading in June 2008.

Comparing June MonthsClimate June 2013.

Extreme cloudiness and rain lead this month’s climate values. Having 73% of mornings with cloud covering more than half the sky makes this the cloudiest month in the 21st century by far. July 2010 and March 2011 reached only 61%. This month’s figure is over twice the June average of 33% cloudy mornings.

With a rainfall total of 98.0 mm, this is the eighth wettest June in 131 years. The wettest was June 1920, with 173 mm. That was the first of a cluster of four extremely wet Junes, ending with June 1931, that were among the ten wettest. Only eight years ago, June 2005 was the sixth wettest on record, at 109 mm.
This month’s rainfall defers any shortage. Among totals for more than one month, the driest is the 34th percentile for the last three months (Total 3-month rain: “only” 116 mm).
The mean daily maximum temperature, 17.3°, is just 0.5° below normal, but the mean daily minimum, 5.7°, is very high, 2.9° above normal (as in 2005, 2008 and 2009). The subsoil remains very warm.


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.

Autumn 2013 began wet

Weather log Autumn 2013Three quarters of the rain this autumn fell in the first two days: 31 mm and 45.4 mm. After that, the heaviest falls were 6.2 and 6.8 mm late in May. Days were cool with the rain, and warm in late March and late April. The warm days in late March came with warm nights, but the warm days in late April brought very wide daily temperature ranges instead.

This autumn was like autumn last year. That is, it was near average in most respects, but with high subsoil temperature and plenty of cloud. Dew points were even lower, reaching a record low value of 6.1°.
Rain fell on 11 days (normal), totalling 103 mm. This is below the 125-year autumn average of 133 mm, and in the 46th percentile.Climate autumn 2013

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.

Rainy Cool March 2013

The daily weather logWeather log March 2013.

Days and nights were cooler than normal until late in the month. The first day was the coldest: 22.2°. March began with 31 mm of rain on the 1st, and 45.4 mm on the 2nd, but little fell later.

 Comparing March monthsClimate March 2013.

In most ways, the month was like March last year: a bit cool, particularly in the day-time, but warm in the subsoil, and rather cloudy, but not humid. However, there was much more rain.

The total rainfall (84.6 mm) was in the 80th percentile, far above the mean of 53.3 mm. Rainfall totals for groups of months (2 months up to 360 months) are now all above their median values. The 36-month total of 2328 mm is extremely high, near the 36-month record of 2662 mm set in October 1998.


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.

 

Cool February 2013

The daily weather logWeather log February 2013.

Hardly any days or nights in February were warmer than normal. The daily maximum temperature of 23.6° on the 2nd was 10.1° below normal. (But one day in February 2009 reached only 17.8°!) The weekly mean temperature remained below normal by between one degree and five degrees.
Sunny days with low humidity came mainly early in the month. There were seven rain days (normal), but the highest reading was only 16.4 mm, on the 24th.

 Comparing February monthsClimate February 2013.

Mean maximum, minimum, and mean temperatures were low, like last February, but not quite as low as February 2008. As a rule, February in Manilla is practically as hot as January, but this time it was 6 degrees cooler.Record low morning dew points show the air was very dry, which is strange when there was more than usual cloud and rain.

The total rainfall (58.0 mm) was in the 56th percentile, just below the mean of 66.8 mm. Among rainfall totals for groups of months, only that for 12 months (490 mm) is below the median value.


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.

 

January 2013 very hot, then wet

The daily weather logWeather log January 2013.

Days were sunny and extremely hot in the first three weeks. Saturday the 12th had the highest temperature on this record: 43.2°. Later, days were cloudy, and the maximum temperature on the 28th was only 21.3°. That was 12.6° below normal, and the second coldest January day. Most nights were warmer than normal, helping to make the weekly average of 30.3° on the 10th the second hottest, after a week in November 2009.
Only a few showers had fallen until the 27th, when ex-tropical cyclone Oswald brought 89 mm in three days of steady rain.

 Comparing January monthsClimate January 2013.

Unlike recent arid months, March was near normal in day-time temperature, humidity and cloudiness. Nights were very warm, however .

The total rainfall of 101.6 mm is almost twice the March average of 53 mm, and in the 85th percentile. March has been wetter in nineteen years, including 2001 (103 mm) and 2007 (114 mm). Taking rainfall totals for more than one month, the greatest shortages are not serious (i.e. not below the 10th percentile). The twelve-month total (469 mm) is in the 14th percentile. Other totals have higher percentile values, and most totals for 30 months or more are above normal.


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.

 

December 2012 Hot, with Rain

The daily weather logWeather log December 2012.

As in November, most days this month were warmer than normal. The 1st, at 40.6°, was the equal hottest December day on this record, with 30/12/05.
Afternoon values of Relative Humidity fell to 7 percent on the 15th and 16th.
Rain was recorded on nine days, totalling 97.4 mm, with the highest reading 29.8 mm on the 26th.

 Comparing December monthsClimate December 2012.

Days this month, at 33.3°, were not quite as hot as those of December 2005 (33.7°). Nights this month were warm (17.5°), but not nearly as warm as those of December 2009 (18.6°). In stark contrast, December 2011 was several degrees cooler.
The mean early morning Dew Point of 11.7° shows the air is almost as dry as it was a year ago. Since then, the air has been even drier, with an extremely low morning Dew Point of 1.7° in October.
The sky was less cloudy than in any of the last five Decembers.
The rainfall of 97.4 mm is high, in the 72nd percentile for December. This defers all concerns about rainfall shortages: even the five-month total of 190 mm is in the 25th percentile.

The Year 2012

In 2012, rainfall was extremely high in February, April, and July, but extremely low in August and October. The total for the year (669 mm) was a little higher than the long-term mean of 652 mm, but a lot lower than last year’s 837 mm.
By other measures, Manilla’s climate drifted during the three years 2010, 2011 and 2012, from a humid coastal type to an arid inland type. In 2010 day temperatures had been very low (24.6 degrees), and night temperatures high (11.2 degrees), as would happen on the coast. By 2012, day temperatures had risen to normal (25.5 degrees), and night temperatures had fallen very low (9.6 degrees). A typical day in 2010 had the very narrow temperature range of 13.4 degrees, while a day in 2012 had a range of 15.9 degrees.
In the same way, 2010 had been extremely cloudy and humid, while 2012 had normal cloud and extremely low humidity. Subsoil temperature (750 mm) rose from a low value of 19.6° in 2010 to a record annual high of 21.6° in 2012.


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.