Another air frost!

The lighter winds on Thursday saw the daytime temperatures recover a little but with a maximum of 11.6C it was another cool day being 2.7C below average.The sunshine amounted to 6.8 hours and the UV peaked in the ‘High’ category again during the dry day.

Yet another air frost occurred overnight, in fact only just, with a minimum of -0.3C at 03.35, which was the sixteenth air frost this month when the 37-year average was 5.2.

Friday started with a cloudy sky and just a kittle brightness but just before 08.00 the sun began to make an appearance.

Enough is enough! Rain for most of the day on Wednesday

The overnight rain Tuesday into Wednesday was very welcome (7.9mm) but the depression centred over Northern France brought an extensive area of thick cloud and rain over southern England that circulated ever so slowly. As a result the rain drops in the morning turned to persistent rain all afternoon and into the evening eventually ceasing just before 19.00. These many hours of rain produced another 8.6mm of rainfall that brought the monthly total to 23.9mm, which is still 34mm below the 37-year average.

Not only was Wednesday wet but very cold. The thermometer refused to rise above 8.9C, being 5.4C below the average, that combined with the strong wind gusting to 25mph particularly in the morning, produced a wind chill that meant it felt a degree or two lower when outside.

As the depression eased away the cloud thinned and the clearing sky meant another cool night with a minimum of 0.9C that produced a ground frost.

Welcome sunshine greeted the new day on Thursday that lifted the temperature to 4.7C at 08.00. However, the very cold day and cool night meant the soil temperature at a depth of 5cm dropped to 5.9C, not good news for gardeners.

The depression over northern Germany has meant a change in the wind direction again and today has backed into the north but less strong than on Wednesday.

Welcome rain for my very dry garden!

There were a couple of light showers in the early evening of Tuesday but the heavier rainfall occurred just before 23.15 and again just after 03.30 on Wednesday producing a total of 7.9mm. This brought the monthly total to 15.3mm, which is still 43mm below the 37-year average. This is offset by the equivalent loss of rainfall through evaporation from ground sources and plant life of 58mm.

The wind during Tuesday traversed almost the full range of the compass starting in the southeast it rotated clockwise ending back in the north east on Wednesday.

Thankfully there was no air frost during the last night as after a maximum of 14.9C on Tuesday (+0.6C) the thermometer dropped no lower than 4.8C (+0.7C) overnight thanks to the cloud and rain from the depression crossing the area.

The depression on Wednesday is currently over northern France, rotating anti-clockwise, thus the wind is currently coming again from the cold north east. The barometric pressure at 08.00 read 1005.4mb, which is the lowest pressure since 13th March.

Sharp air frost returned overnight

A maximum of just 13.5C on Monday was the coolest day for over a week and 0.8C below average. The northeasterly wind was brisk again gusting to 22mph.

It was another dry day, the fifteenth consecutive with the UV level a little lower than previous days only just in the ‘High’ category.

The thermometer fell sharply during the late evening producing a sharp air frost, the first since the 20th. A minimum of -1.9C was logged at 05.57 on Tuesday morning. We have now experienced 15 nights with an air frost when the average over the past 37-years is 5.2. The previous record was 10 April air frost in 2013 and 1997.

The barometric pressure fell steadily on Monday as the high pressure slowly slunk away and a minor depression began its progress southwards across the country. The reading at 08.00 on Tuesday was 1011.9mb, a drop of 12mb in the past twenty-four hours and the lowest pressure all month.

Tuesday began with a cloudy sky that muted the sunshine but after 07.30 brief sunny intervals appeared through gaps in the the cloud. With a temperature of 2.7C at 08.00 it was the coldest start to a day for over a week

The significant change in the weather is that early this morning the wind that for days came from from the north east and east has backed into the south and southwest so there is a warmer feel to the air.

North easterly produces wind chill again

The strong wind on Sunday from the north east, gusting to 27mph, the strongest since the beginning of the month, saw temperatures depressed again. The thermometer only reached 14.4C, just above average but 2C down on the Saturday peak. There was also an element of windchill that meant outside it felt at least 1C colder than that indicated on the thermometer. However, out of the wind it was pleasant in the 10.2 hours of sunshine with the UV level again at the top end of ‘High”.

A very cool night followed with a minimum 1.2C at 05.56 on Monday.

The temperatures have been drifting downward over the last three days and nights. This can be seen in the soil temperatures at a depth of 5cm with 9.3C, 8.0C and 7.8C respectively at 08.00.

Monday did arrive with some brightness but a large area of cloud soon drifted in from the east and extended back to the North Sea.

We have now experienced 14 consecutive days without rain, the longest dry period since April 2020 when there were 19 consecutive dry days and a succession of winds from the north east just as this year.