Wednesday, 28 May 2008
Wednesday, 21 May 2008
Now it's warming up again, the risk of air frost has probably gone until the autumn. The minimum temperature (2.2 Celsius) that occurred the night before last, was the equal lowest during the second half of May in Morden for at least 20 years. A similar minimum occurred on the night of the 28th/29th May 1994. An air frost did occur in a few places on Monday night, with minus 0.3 Celsius recorded at Farnborough (Hants). The cold air originated north of the Arctic Circle, and when it crossed Finland, minima of minus 10 Celsius occurred, resulting in much damage to apple blossom.
Friday, 16 May 2008
Sunday, 11 May 2008
Nearly one third of the month has gone and temperatures are heading towards a new record, but are they? The year 1992 had the warmest May on record in south London, with May 1989 only a fraction of a degree cooler. In May 1992, most of the very warm days occurred during the second half of the month, with several decidedly chilly days during the first fortnight. It is very unlikely that the present warm spell will persist, but a very pleasantly warm May, so far.
Tuesday, 6 May 2008
The temperature exceeded 22 Celsius for the third consecutive day today. The last time this happened was between the 5th and 7th September last year. During May last year there were 4 consecutive days late in the month with highs above 22 Celsius and there were also 3 consecutive days above 22 in April. The longest sequence during the last 20 years of 22+ days (9) in May occurred during 1998, from the 8th to the 16th. After a maximum temperature of 21.4 on the 17th, there were then another 3 consecutive days with highs above 22 Celsius. By way of contrast, in May 1994 the temperature failed to rise above 22 Celsius all month!