May 2016: cooling down

Photo of caterpillars in procession.

White Cedar caterpillars.

Until the last week of May, the warm weather of March and April continued. Three nights (early mornings) were more than eight degrees warmer than normal. At 16.5°, the early morning of the 1st was the second warmest for May in this century after 16.9° on 3/5/2000. The first frost (a black frost) came on the 25th, not as late as in 2014, when the first frost came on the 8th of June! (More frost information is here.)

I recorded rain on 7 days (normally 3 in May) but 4 of them had less than 2 mm. The highest reading was 13.8 mm on the 2nd. The afternoon humidity was very high (seldom below 40%) which may explain the bothersome mosquitoes.

 Weather log for May 2016

Comparing May months

The month was warm, especially at night, but not as warm as May in 2007 or 1999.
Skies were more cloudy than usual, at 45% cloudy mornings (more than 4/8 cloud). May is usually sunny, with only 24%, but both 2014 and 2015 had a record 52%
The total rainfall of 34.5 mm was near the average of 41 mm, in the 54th percentile. (Since 1998, every May rainfall except 2011 has been below average.) For the seventh month in a row, there are no serious rainfall shortages for totals for any number of months. Again, the greatest shortage is the 48-month total (2211 mm) which is now in the 14th percentile. Ponds persist in Greenhatch Creek, but a neighbour’s dam is dry.

Climate for May 2016


Data. All data, including subsoil at 750 mm, are from 3 Monash Street, Manilla. Rainfall data up to 26/3/15 is from Manilla Post Office, Station 055031.

January 2016: moist again

Photo of Senna-bush

Jewel-box Cassia

Unlike December, this month saw varying temperatures. The week around the 7th was quite cool. The maximum on the 3rd reached only 22.3°, but worse was to come. The 15th reached only 21.1°: equal coldest January day in the new century (with 31/1/2001). It was more than 12° below normal, and that happens less than once in a year. There was also one very hot day above 40°, which is the normal number for January.
Rain fell, mainly as showers, on ten days spaced through the month. The higher readings were 28.4 mm on the 6th, 24.2 mm on the 23rd, and 27.6 mm on the 24th.

Weather log January 2016.

Comparing January months

Like January last year, this month could be called “moist”. It was cloudy, and the rather cool days were only 14° warmer than the nights.
The total rainfall of 104.7 mm was well above the average of 87 mm, and in the 72nd percentile. Again, there are no serious rainfall shortages for totals for any number of months. In fact, totals for 2-, 3-, 4-, 5-, and 6-months are very high.

El Niño

Manilla’s climate is now out of step with the El Niño – Southern Oscillation (ENSO). This “super” El Niño has not brought dryness here, and the dryness in January 2014 (for example) came at a time without an El Niño.

Climate for January 2016


Data. All data, including subsoil at 750 mm, are from 3 Monash Street, Manilla. Rainfall data up to 26/3/15 is from Manilla Post Office, Station 055031.

Winter 2015 like winter 2014

A low-level lenticular cloud

Low Level Lennie

Weather log for winter 2014There was one short spell of rather cold days in mid-July this year, and another at the very end of August.
Otherwise, this winter was very like the winter before. In mid-June and late August there were humid spells with heavy rain and very warm nights. By contrast, early August had cold nights with very low humidity and no rain. In both years, July had very light falls of rain.
The number of frosts in each season (38; 42) was near normal (44), but in this winter the coldest night (minus 2.1°) was the warmest so far this century.

Weather log for winter 2015

Like last winter, the average night temperature and the cloudiness were a little high, and the dew point very low. Average day temperature was half a degree low, making the daily temperature range narrow.
The winter rainfall, 133 mm, was just above the average (125 mm) and in the 62nd percentile.

Climate for winter 2015


 Temperature, including subsoil at 750 mm, and other data are from 3 Monash Street, Manilla.

Cloudy autumn in 2015

Photo of eucalyptus tree

Eucalyptus albens in bloom

For a time around the 20th of April, days averaged five degrees colder than normal. At that time nights were warm, making the daily temperature range a remarkable eight degrees less than normal. On three occasions the dew point (humidity) was down by six degrees or more: early and late in March, and in mid-May. The sub-soil temperature was low most of the time by up to half a degree, but ended one degree high. Rain fell in each fortnight. The number of rain days (19) was high, but the highest daily reading (26 mm) was normal. Weather log for autumn 2015 This autumn, like the last, was moist. The rainfall, at 137.5 mm, was a little higher (on the 60th percentile) and the mean daily temperature range was a new record narrow value of only 14.0°. The season was very cloudy, with 41% cloudy mornings, but did not beat last year’s record 48%. The early morning dew point, 7.2°, was not even up to normal (8.5°). Warm nights and cool days made the mean temperature normal. Climate for autumn 2015


 Temperature, including subsoil at 750 mm, and other data are from 3 Monash Street, Manilla.

June 2014: normal weather

The daily weather log

Vintage machinery fair

Oil Engine’s Day Out

In four short  rainy spells, nights were very warm and days cool. Otherwise, the weather was normal but rather cloudy. There were eight rain days (normally six). The wettest had 17 mm, which is normal. Only nine mornings were frosty, when normally there are thirteen.

Weather log June 2014

Comparing June months

Most average values were near normal for June. However, the nights were warm, the daily temperature range narrow, and the skies cloudy. The month was not extremely wet and cloudy like June last year.
The total rainfall of 40.2 mm is in the 55th percentile, close to the average.. Taking rainfall totals for more than one month, only the 12-month and 15-month totals are serious shortages (7th percentile). The 3-month total (71 mm) is in the 12th percentile. Other totals have higher percentile values, and most totals for 36 months or more are above normal.

Climate June 2014


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.