Dry by day, wet by night

Although we had 5.9 hours of sunshine on Wednesday and the UV level reached a peak of 6.5, which was ‘High’, the thermometer did not reach an average maximum, again, with a peak of 16.1C (-1.2C). It was however, a dry day. The rain set in at 22.45 and amounted to 3.7mm, bringing the monthly total to 38.4mm when the 37-year average was 59.6mm.

At least the last few nights have seen a minimum above average and last night was no exception with a low of 8.7C (+1.7C).

Thursday morning saw us under a cold front draped in an arc over the area, although dry to start with more rain is likely as the depression, centred off the Dorset coast, slowly revolves anticlockwise. This will bring another rain band during the morning. The moving orientation of the depression saw the wind on Wednesday in the afternoon back into the south east. A couple of hours before midnight it began to veer into the north and this morning is coming from the northeast.

Changeable

Tuesday was another day with showers and sunny intervals with 5.6 hours of sunshine and rainfall totalling 3.5mm that principally fell between 16.45 and 18.25.

The maximum of 15.8C made it the warmest day this month but still 1.5C below the 37-year average. The minimum of 7.2C was also above average, just (+0.2C).

Wednesday was initially quite cloudy but between 07.30 and 08.00 the cloud began to thin and serious sunken to break through that lifted the temperature at 08.00 to 10.6C.

Due to the almost stationary depression in the eastern Atlantic, just off the coast of Ireland, the wind has been predominantly from the south or south-southwest for four days and continues from that direction today.

The warmer days and nights, also early morning sunshine meant that at 08.00 today the soil temperature at a depth of 5cm had risen to 12.6C not seen since 31st October.

Southerly air flow continues

Although we had more sunshine on Monday, 7.2 hours, the temperature did not rose above the average with a maximum of 15.1C (-2.2C). However, the UV level rose to 6.8 being at the top end of ‘High’, which was the highest strength since 25th August.

Another 1mm of rainfall was logged bringing the monthly total to 31.2mm when the average isn 59.6mm.

The thermometer fell below average overnight to a minimum of 5.1C (-1.8C) after two consecutive above average nights.

Tuesday began with thick cloud and very brief brightness due to banks of thick cloud over the area and to the east.

The barometric pressure is still low, current reading of 1006.8mb, as the depression just to the west of the UK is rather stuck being blocked in its eastward journey due to a high pressure over Scandinavia. Therefore, the succession of wind from the south or south-southwest continues.

Showers and more showers

Sunday was a predominantly dry day, light rain 18.20 but not measurable, with the UV level into the ‘High’ category during the minimal sunshine of 3.2 hours. The south-southwest breeze was brisk but coming from the Atlantic was warmer with the result that the thermometer rose to 15.5C making it the warmest day since 24th April but still 1.8C below the 37-year average.

Another mild night followed with a minimum of 9.2C just before midnight, which was 2.2C above the average. A short shower just after dawn brought 0.6m of rainfall.

By 08.00 on Monday the thermometer had recovered to 10.7C but no real sunshine, just minimal bright intervals in the short cloud breaks. The soil temperature at 08.00 was 11.2C. After the prolonged cold spell plant life is now showing real growth as although the maxima are still below average, but higher, the last two nights have been well above average for May being +3.1C and +2.2C respectively.

Sunless damp day on Saturday

The main rain band eased away on Saturday morning but left a hang back of cloud that produced drizzle from low thick cloud for most of the daylight hours. Not surprisingly no sunshine was logged and the UV level of 1.7 was classed as ‘Low’.

The thermometer rose to a maximum of 13.6C, down a little on Friday’s peak and still 3.7C below the May average.

The thick cloud and moist air continued overnight from a southwesterly direction. This is a warmer air mass than of late and with thick cloud minimising loss of warmth to the atmosphere, the thermometer did not sink below 12.3C. This low was 5.1C above the 37-year average and the warmest night since 31st October.

At first light on Sunday the thick cloud was still evident and light drizzle observed. However, just before 08.00, the cloud began to thin and lift, the drizzle to disappear with brief sunshine observed at 08.27.

The soil temperature at a depth of 5cm at 08.00 today was 11.8C. This was the warmest since 2nd November so perhaps plants in the garden will now begin to grow after the prolonged cold spell and frequent frosts.