October 2020 weather review

The review of the weather at Ferny Grove during October 2020 is now available.

During October 2020 overnight temperatures were close to average and daytime temperatures were above average. Overnight temperatures were near or below average in the first half of the month before warm nights during most of the second half of the month. The 22nd to 29th saw warm nights of up to 6 ºC above average. Daytime temperatures were above average throughout the month with some days that were cool.

Rainfall in October was above average with a total of 119.5 mm (185.4% of the long term average). The year to date rainfall remained above average at 11.5 % above the long term average. From the 19th was an active period of showers, rain and thunderstorms with some moderate to heavy falls. 14 mm of rainfall fell in 8 minutes on the 25th during a severe thunderstorm with marble size hail. On the 31st was 2 hours of thunder from 4 nearby thunderstorms with very little rainfall.

Long period rainfall totals remained well below average during most periods though improved for some periods. 6 monthly rainfall improved by 130 mm to 64.5 mm below average. 9 monthly rainfall remained above average at 97.2 mm above average while 12 month rainfall was 12.2 mm above average, improving from 58.6 mm below average in the previous month. Periods between 18 to 48-month remained below average and was as much as 624.9 mm below average for 36 month rainfall.

The summary containing the key information can be found here.

The full report of more detailed analysis is available here.

September 2020 weather review

The review of the weather at Ferny Grove during September 2020 is now available.

During September 2020 overnight temperatures were above average and were the highest in 10 years. Similarly to August 2020, the month saw very few cool nights and many warm nights throughout the month. The 18th to 25th saw overnight temperatures peak at 9 ºC above average. Daytime temperatures were close to average and saw a mixture of above and below average temperatures.

Rainfall in September was below average but was close to the long term median, with a total of 14.2 mm (42.7% of the long term average). The long term rainfall for September is generally quite low, hence the close to median rainfall. While the rainfall total was quite low and continuation of the trend of low monthly rainfall totals, the year to date rainfall however remains above average at 9.8 % above the long term average and the highest since 2015. Low daily rainfall totals with light showers during some days during the month. A thunderstorm passed to the south on the 25th, as well as another thunderstorm to the north and brought a brief light shower.

Long period rainfall totals remained well below average during most periods while deteriorating further. 6 monthly rainfall fell significantly to 161.7 mm below average being more than 6 months since significant rainfall at the start of the year. 9 monthly rainfall was 79.4 mm above average while 12 to 48-month rainfall was between 72.4 mm below average for 12 month rainfall and 245.3 mm below average for 24 month rainfall.

The summary containing the key information can be found here.

The full report of more detailed analysis is available here.

August 2020 weather review

The review of the weather at Ferny Grove during August 2020 is now available.

In August 2020 overnight temperatures were above average and were the highest in 6 years. During the month there were very few cool nights and many warm nights that were as much as 5 ºC above average. Daytime temperatures were also above average but was the lowest in 4 years. Throughout the month daytime temperatures were above average with several warm periods occurring with temperatures of up to 5 ºC above average. Persistent overnight breezes and cloud cover during much of the month slowed the fall in the overnight temperatures.

Rainfall in August was below average but was close to the long term median, with a total of 14.8 mm (40.9% of the long term average). With the continuing trend of low monthly rainfall totals the year to date rainfall however remains above average at 12 % above the long term average and the highest since 2015. Some light rain with brief heavy falls in the afternoon on the 7th (12.2 mm of rainfall). The 15th saw some light rain at times early in the day with the passage of a front. Light showers on the 15th accompanied with gusty winds brought 1.4 mm.

Long period rainfall totals have remained well below average while deteriorating further. The shorter time spans remained above average. 6 monthly rainfall slipped significantly to 161.7 mm below average being more than 6 months since significant rainfall earlier in the year. 9 monthly rainfall was 79.4 mm above average while 12 to 48-month rainfall was between 72.4 mm below average for 12 month rainfall and 245.3 mm below average for 24 month rainfall.

The summary containing the key information can be found here.

The full report of more detailed analysis is available here.

July 2020 weather review

The review of the weather at Ferny Grove during July 2020 is now available.

In July 2020 overnight temperatures were above average and were the highest in 4 years. During the month there were very few cool nights and many warm nights. The 21st to 28th was above average as much as 7 ºC above average. Daytime temperatures were close to average and in contrast to the overnight temperatures was the lowest in 4 years. Most of first 18 days of the month saw above average daytime temperatures. There were several cool days between the 21st and 25th associated with cloud coverage and rainfall. Persistent overnight breezes during much of the month slowed the fall in the temperature and prevented cold mornings from occurring.

July rainfall was below average, with a total of 50.4 mm (150.3% of the long term average). Even though most preceding months during autumn and winter observed below average rainfall totals the year to date rainfall however remains above average at 15.6 % above the long term average and the highest since 2015. On the 9th, 10th and 12th were light showers and drizzle with some light rain. Rainfall returned later in the month with further light rain at times and showers between the 24th and 26th as a result of a frontal system and the coastal trough that shifted southwards along the coastline. On the 26th the passage of gust front brought showers but with no measurable rainfall.

Long period rainfall totals remained well below average but improved a little for most periods. The shorter time spans have remained above average, given the significant or near average rainfall was experienced in February and March. 6 monthly rainfall remained above average but was below average for 9 monthly to 48 monthly, with the greatest being 18 monthly rainfall at 236.9 mm below average.

The summary containing the key information can be found here.

The full report of more detailed analysis is available here.

June 2020 weather review

The review of the weather at Ferny Grove during June 2020 is now available.

June 2020 saw above average overnight and daytime temperatures. A record warm morning was observed on the 14th that exceeded the previous record set 5 years ago. Most of first 18 days of the month saw above average daytime temperatures. Following the passage of a front there were cool nights between the 22nd and 26th, but was partially affected by persistent overnight breezes that slowed the falling in the temperature during much of these nights.

In June rainfall was slightly below average, with a total of 45.5 mm (73.5% of the long term average). This follows below average rainfall that occurred in the previous 2 months in autumn. Year to date rainfall however remains above average at 14 % above the long term average and the highest since 2015. During the middle of the month were showers with mostly light falls. A shower on the 14th brought brief heavy falls of 5.8 mm in 3 minutes. With the passage of the trough that preceded the cool nights later in the month were further light showers before some light showers returned at the end of the month.

Long period rainfall totals over the shorter time-spans improved slightly due to the near median rainfall in June but the longer time-spans have remained the same or deteriorated further given past months has seen below average rainfall totals. 6 monthly rainfall remained above average given the significant or near average rainfall was experienced in February and March. However 9 monthly to 48 monthly rainfall remain well below average with the greatest being 18 monthly rainfall at 285.5 mm below average.

The summary containing the key information can be found here.

The full report of more detailed analysis is available here.

Autumn 2020 weather review

The review of the weather at Ferny Grove during autumn 2020 is now available.

Autumn 2020 brought close to average overnight temperatures, whilst daytime temperature were 1 ºC above average. The mean daytime temperature was very similar to autumn in 2019 while the overnight temperatures were nearly 1 ºC lower. The lowest overnight temperature during the season of 9 ºC was the highest on record for autumn. Between the 22 May and 24 May were cool to cold days that brought a record low daily maximum temperature of 16 ºC on the 23 May.

After close to average rainfall during March, the following months in April and May saw low rainfall totals. The rainfall total for May (12.1 mm) was the lowest since 2004, and 70 % of the rainfall in May occurred on the 21st due to the passage of the trough followed by a cold and dry air mass brought by a complex low pressure over southern Australia. The highest hourly rainfall total in March was a new record high when a severe thunderstorm on 6 March brought 40 mm in 30 minutes with very heavy rainfall. The total for the season was the lowest since 2016 with a total of 168 mm (52.3 % of the long term average).

By the end of the season long period rainfall totals fell with the low rainfall totals during much of the season. Anomalies from the long term average were in the negative for all periods between 9 and 48 months, with the lowest being 18 month rainfall being 368 mm below average. However, because significant rain was experienced at the start of the year 6 monthly rainfall is still above average (60.5 mm above average and in the highest 20% of records).

The summary containing the key information can be found here.

The full report of more detailed analysis is available here.

May 2020 weather review

The review of the weather at Ferny Grove during May 2020 is now available.

May 2020 experienced near average overnight and daytime temperatures. Daytime temperatures were 1 ºC above average during the month until a number of cool to cold days between the 22nd and 24th reduced the mean maximum temperature to near average.

In May very little rainfall was observed during the month, with a total of 12.1 mm (12% of the long term average) and the lowest for May since 2004. 70 % of the rainfall occurred on the 21st due to the passage of the trough followed by a cold and dry air mass brought by a complex low pressure over southern Australia. Rainfall otherwise during the month was comprised of light showers with low daily rainfall totals, mostly in the middle of the month.

Long period rainfall totals also continued to reduce further in May followed continued below average rainfall during autumn. Anomalies from the long term average reduced further as a result with 9 monthly to 48 monthly below average, with the lowest being 18 month rainfall being 368 mm. But given that significant rainfall was experienced at the start of the year, 6 monthly rainfall is still above average (60.5 mm above average and in the highest 20% of records).

The summary containing the key information can be found here.

The full report of more detailed analysis is available here.

April 2020 weather review

The review of the weather at Ferny Grove during April 2020 is now available.

April 2020 saw near average mean minimum temperatures, whilst daytime temperatures were well above average and record high with a high number of warm days. There were very little rainfall during the month which was 14% of the long term average.

The first three months of 2020 brought average or above average rainfall, with an significant improvement in long period rainfall totals (except for periods longer than about 12 months). However with the below average rainfall in April the 6 and 9 monthly rainfall totals have started to dropped back into negative anomalies. Negative anomalies for the 12 month to 48 month rainfall totals increased further also.

The summary containing the key information can be found here.

The full report of more detailed analysis is available here.