A very average October this one, mean temperature was +0.1 degC compared to the average in Durham (9.8 degC) and rainfall was spot on average (60.9 mm) for the month. The bulk of the rainfall came in two spells, around the 12th-13th and 27th-30th.
There were several ground frosts late in the month as the air flow came from the northerly arctic source. Sleet was observed to fall on the morning of 27th.
The first ground frost of Autumn was evident this morning. Frost could be seen on cars and on the grass when I went out about 8am. The air temperature was still well above freezing though, bottoming out around 3.5 degC. This shows how the temperature at ground level can be much lower on clear nights, when the dew point is depressed in slightly drier air.
The day then turned out to be superbly sunny and quite mild. A classic Autumn day!
A very average September temperature wise, there were some warm days at the start of the month and another on 26th.
Rainfall total was slightly above average, mainly due the extremely wet 2 day period of the 20th and 21st. The total for these 2 days was 44.6mm, which contributed more than half of the final total for the month.
The very wet Summer of 2012 continued into Autumn. The river burst it’s banks again in the city. This red car (Ford Ka) became quite famous as it bobbed about in front of the new Radisson Hotel (due to open a couple of months after this photo was taken).
A view of the flood from the Passport Office/National Savings Building. The red car can just be seen in the left mid-distance.
There was exceptionally heavy rainfall and flooding towards the end of the month. The rainfall was spread across two days, with 47.4mm recorded on the 24th and 40.8mm on the 25th. The former is the 27th wettest day on record at Durham since 1850 and the latter was the 41st wettest. Looking at 2-day totals, the combined total of 88.2mm is the 5th highest 2-day total since 1850, although well less than the record holder, 10th / 11th September 1976 when a total of 120.1mm was recorded. The heaviest rain fell late on the evening of the 24th when 16mm fell in 3 hours. It was the wettest September since 1976 and the 7th wettest on record.
Another one for the record books, September 2006 is the warmest September on record, beating September 1729 in the CET series. This record had stood for 277 years up to this year, and was the longest running record of any ‘warmest month’. Recently broken ‘warmest’ records are seemingly gathered in the second half of the year, with the longest standing remaining record for July-December resting with December 1974 (this was broken quite decisively in December 2015). The absolute high for September was raised to 27.1 degC on 21st of September 2006. There were no cold nights, and rainfall was slightly above average.
Again, I use my record from Ferryhill to show the daily conditions.