September 2006 summaries

[Polar Continental]

September 2006 Report.

By Paul Carfoot.

With low pressure very close by, the first couple of days in to September began a very Autumnal with strong winds and heavy rain. However by the 4th high pressure started to build from the west and the weather quickly settled down and became sunny and very pleasant.

This very pleasant dry fine spell continued in Burton until the 13th, some unusually high temperature were recorded for September during this period with a top temperature of 27.3c being reached on the 11th when a spectacular thunderstorm broke out that evening giving a brilliant lightening display over the Burton area.

A brief breakdown occurred on the 14th as pressure began to fall, there were frequent thunderstorms with some tropical like heavy rain here in Burton, I recorded 28mm of rain from 1am up until 15:00hrs.

The 15th saw the weather quickly settling down with warm and very pleasant conditions continuing until the 20th.

The 21st saw remnants of hurricane Gordon running up through Ireland, and although Burton saw an increase in wind, the major effect it had on our weather here was to help bring up some very warm air from north Africa and southern Spain which gave us here in Burton an extraordinarily high September maximum temperature, I recorded 27.7c during a day of wall to wall sunshine.

The 22nd saw another tropical like down pour as a cold front crossed the area and shifted away some of the hot air away, although I only measured 12mm in that particular downpour, but still respectable never the less.

The weekend of the 23rd in Burton saw a return of the Indian summer like weather with plenty of warm sunshine, although a Thunderstorm did pass very close to the area on the morning of the 24th, this quickly cleared away to leave yet another very warm and sunny day.

This largely fine and pleasantly warm weather continued until the 28th.

Finally the last two days of the month saw low pressure move close to the south west of the British Isles, so almost all areas including Burton received some rain, mainly in the form of showers.

Summary.

A very warm and mostly pleasant sunny month, with southerly winds being the dominant feature.

September was an extraordinarily warm month, with many fine warm sunny days, the mean temperature was almost as warm as August.

One thing of special note was the absence of cool nights; my lowest temperature was only 6.7c on the 8th so not even a ground frost was recorded in Burton.

Stats below are calculated using the average of the mean monthly maximum and the mean monthly minimum.

Average maximum temperature = 20.7c

Average minimum temperature = 12.8c

Mean temperature = 16.7c + 3c above the 1971 – 2000 CET average.

Warmest day on the 21st = 27.7c

Coldest day on the 29th = 17c

Warmest night on the 13th = 16.8c

Coldest night on the 8th = 6.7c

Ground Frosts = 0

Air frost = 0

Thunderstorms = 3

Wettest day on the 14th = 28mm

Rainfall total = 56mm

[Andy Bown]

This past month was more than 1.6c warmer than all the previous Septembers I've recorded temperatures!

Average Max = 20.53c

Average Min = 12.83c

Mean = 16.68c

Highest = 29c (11th)

Lowest = 5c (8th)

Dry days = 12

Rain days = 18

Rainfall = 86mm of which 61.5mm fell in the thundery last week!!

In a continuation of August's theme of regular temperatures there were 18 maximums between 20c-23c and 23 minimums between 11c-14c.

Therefore in the last 61 days there have been 43 maximums of 20c-23c and 48 minimums of 11c-14c.

[jmackenz]

Very briefly, a relatively warm, dry month.

Key stats from Inverurie:

Mean Temperature 15.6°C, 3.9°C higher than average.

Minimum Temperature 5.7°C

Maximum Temperature 27.2°C

Total Rainfall 41.9mm, 26.4mm lower than average.

[Osbourne One-Nil]

September in Great Asby...very mild but very wet too:-

Average daily maximum = 18.7º (0.9º higher than August)

Highest daily maximum = 25.0º (21st)

Lowest daily maximum = 14.2º (15th)

Average daily minimum = 10.1º

Highest daily minimum = 13.5º (1st, 12th & 13th)

Lowest daily minimum = 2.9º (8th)

Monthly mean temperature = 14.4º

Total monthly rainfall = 143.8mm

Number of wet days = nineteen

Wettest day = 38mm (14th)

[Red Raven]

19.6 mean max

10.5 mean min

15 mean +2.4 diff from av

26.3 high max on 21

16.1 low max on 14

16.1 high min on 21

3.7 low min on 8

99.2 rain total (mm) 106% of av

18 raindays (no. of days with 0.2mm or more)

12 wetdays (no. of days with 1.0mm or more)

17.6 most in a day (mm) on 20

RAIN

4.5 mean wind speed mph

45 max gust mph on 21

[tugmistress]

Averages\Extremes for the month of September to 30 2006

------------------------------------------------------------

Average temperature 13.6 °C

Average humidity 88 %

Average dewpoint 11.5 °C

Average barometer 1007 mb

Average windspeed 7.1 mph

Average gustspeed 8.9 mph

Average direction 226 ° ( SW)

Rainfall for month 66.5 mm

Rainfall for year 349.3 mm

-----------------------------------------------------------

Maximum rain per minute 0.5 mm on day 30 at time 00:02

Maximum temperature 28.6 °C on day 11 at time 15:06

Minimum temperature 5.2 °C on day 05 at time 05:39

Maximum humidity 98 % on day 25 at time 09:51

Minimum humidity 46 % on day 08 at time 23:59

Maximum pressure 1027.9 mb on day 08 at time 13:22

Minimum pressure 987.9 mb on day 19 at time 05:51

Maximum windspeed 44.9 mph from 283° on day 19 at time 13:20

Maximum gust speed 54.0 mph from 248° on day 19 at time 15:16

Maximum heat index 29.1 °C on day 11 at time 15:05

------------------------------------------------------------

Daily rain totals

1.0 mm on day 1

3.6 mm on day 2

3.6 mm on day 3

1.0 mm on day 5

1.0 mm on day 6

1.5 mm on day 7

0.5 mm on day 11

3.6 mm on day 12

13.8 mm on day 14

3.1 mm on day 15

1.0 mm on day 18

3.1 mm on day 19

6.1 mm on day 20

3.6 mm on day 21

3.6 mm on day 22

3.6 mm on day 23

3.1 mm on day 24

0.5 mm on day 25

2.6 mm on day 26

1.5 mm on day 27

0.5 mm on day 28

2.0 mm on day 29

2.1 mm on day 30

------------------------------------------------------------

[reef]

Hedon, East Yorkshire.

September 2006

Warmest Max: 25.3°C (on 11/09/06 & 21/09/06)

Coldest Max: 17.3°C (on 16/09/06)

Warmest Min: 16.7°C (on 13/09/06)

Coldest Min: 8.6°C (on 09/09/06)

Average Max: 21.2°C (+3.1°C Above 1971-2000 Average)

Average Min: 13.5°C (+3.4°C Above 1971-2000 Average)

Overall Average: 17.3°C (+3.2°C Above 1971-2000 Average)

Rain: 71.5mm (137% Of Normal)

Wettest Day: 22nd (24.3mm)

Air Frosts: 0

Days with Snow: 0

Snow lying at 0900: 0 days

Dry Days: 16

Wet Days: 14

Days With Rain >1.0mm: 11

Thunderstorms: 1

Year 2006 So Far (Jan - Sep)

Warmest Max: 29.9°C (on 28/07/06)

Coldest Max: 2.1°C (on 01/02/06)

Warmest Min: 18.2°C (on 28/07/06)

Coldest Min: -5.4°C (on 03/03/06)

Average Max: 15.7°C (+1.5°C Above Running 1971-2000 Average)

Average Min: 7.9°C (+1.2°C Above Running 1971-2000 Average)

Overall Average: 11.79°C (+1.32°C Above Running 1971-2000 Average)

Rain: 450.4mm (110% Of Normal)

Wettest Day: 22/09/06 (24.3mm)

Air Frosts: 21

Days With Snow: 11

Snow lying at 0900: 3 days

Dry Days: 127

Wet Days: 146

Days With Rain >1.0mm: 94

Thunderstorms: 23

The warmest September on record - and warmer than August by 0.4°C. There were only 3 days during the entire month that were average or below average. The month was mostly characterised by consistently warm days and nights, rather than any particular hot spell. The warmest days of the month came on the 11th and 21st, when it reached 25.3°C. The period from the 12th to the 25th saw several warm nights however, the warmest being the 13th where a minima of 16.7°C was recorded. There were also only two days with single digit minima values, the 8th (8.9°C) and the 9th (8.6°C).

Suprisingly for such a warm month, rainfall was above average. Though this was mainly due to the final 8 days, which saw two very wet days: the 22nd (24.3mm) and the 29th (18.1mm). The majority of the rainfall was due to shower activity, often very heavy at times. The mean wind direction was in the southerly quarter, though many days were mostly cloudy, meaning sunshine amounts were not as high as would be expected.

Overall, another remarkable month, and the third month in the last year (along with October 2005 and July 2006) that has been the warmest ever.