september « Reigate Grammar School Weather Station

#Reigate September 2015 weather summary

October 11, 2015 — Leave a comment

September 2015 Reigate weather summary

Reigate September summary weather statistics

Tmax 22.4C

Tmin 3.9C

Average temperature 13.3C

Total rain 79.8mm (CoCoRaHs)

Max gust 25mph (14 Sept)

Mean SLP 1016mb

Sunshine 132.9 hours

: Sunny Reigate in September

: sharp shower with some hail

September in Reigate turned out to be cooler than average with rainfall amounting to around average totals mostly falling in showers so that there were relatively long dry sunny spells, especially towards the start of the month, with HIGH pressure in charge or nearby for much of the time.

Reigate sunshine

Reigate pressure and wind

mean 500mb anomaly for September 2015

It was sunnier than usual for September at over 130 hours. This was good news for Run Reigate which turned out to be a beautiful day for the runners.

September anomalously sunny

Sunny Reigate sept 2015

unbroken sunny days occasionally

nice sunsets in Sept

Much of the September rainfall fell in heavy showers, especially in some storms mid-month. This meant 2015 September rainfall at nearly 79.8mm turned out wetter than 2014, at a mere 22mm. Despite this it was still just about equal to the long-term average rainfall according to MetOffice anomaly charts.

Reigate average rain

rainbow and showers over Reigate

Cb action over Reigate

September about average rainfall in SE England

At a mean temperature of 13.4C September was slightly cooler than average and the CET came out at 1C below the long term average. Globally, September was 0.31C warmer than the long term average.

: CET September 2015 below average

: Sept temp anomaly 2015

: September 2015 global temperature anomaly

In Analysis, weather summary Reigate, september, weather summary

#Reigate September 2014 weather summary

October 2, 2014 — 1 Comment

September was a warm and unusually dry month. Central England temperature (CET) came out officially as 15.1C which is 1.5C above the 30 year average (Hadcet) and made September the 4th warmest since 1910. In Reigate our average September temp was 16.5C, not unexpected as we are in the warmer SE of the country. In 2013 the average for September was 14.4C but the range of temperature was greater: 2013 Tmax 30.9C and Tmin 4.6C were both more “extreme” than the respective Tmax 26.7C and Tmin 5.2C of 2014. Whilst the remainder of Autumn looks to be cooling down markedly now, 2014 remains on target to be an exceptionally warm year overall. Despite a cool August all the other months have been above average.

Tmax av

Mean monthly av

Tmin av

CET temps above av

mostly HIGH pressure

and sunny

The UK average rainfall for September 2014 was 19.4mm for the month, the driest since 1910. In Reigate we had 22mm of rain recorded (CoCoRahs) compared to over 47mm in 2013. The rainfall we got in Reigate this September was restricted to a few heavy thundery showers: many of these moved over London and missed us completely. However, a notable thunderstorm overnight on 19 Sept delivered some cracking thunder and lightning at about 1am and brought 10mm of rain in less than 20 minutes, and woke quite a few people up!

dry but patchy due to isolated showers

isolated tstorm over London

towering cumulus

spanish plume

tstorm warning

Tstorms over Essex

a cracking shower

a few thunderstorms

Overall, however, the month was dry: 16 consecutive days of no rainfall at all came early in the month and mostly dry days with just odd showers characterised the rest of the month. Sunshine hours totalled 120 hours. Pictures below are a medley of photos from an “extreme” month due to the exceptionally dry conditions, the driest in 100 years in some places. September in Reigate.