On 01/07/12 09:19, Martin Rowley wrote:
On 27/06/2012 16:00, Martin Rowley wrote:
... (27th June, 2012)
In Hurn's record for sunshine (begins 1969, source Met Office web site),
the lowest June value (CSR instrument) was 139 h in 1990.
'Fudging' between the two (because of the instrument differences), we
would need something like 30 hours sunshine by the current instrument
over the last 3 days of the month to avoid this being the dullest June
in that 1969+ record. Not impossible, but looking unlikely.
For the *three* nominal summer months (June, July, August), then
presently this is the dullest summer month in that 1969+ record; the
previous lowest sunshine total for a summer month occurred in August
2010, and that was of course a KZS (so direct comparison possible), when
the value was 105 h. So we need another 15 h over the next three days by
that instrument to avoid this being the dullest summer-time month (1969+)

... (1st July, 2012)

Total sunshine Hurn (KZS) for whole-month = 101.4hr.

Even allowing for the instrument changes, IMV we've 'comfortably' (if
that's the word I want!) achieved the lowest June sunshine total in
Hurn's record (starts 1969).

And, a bit of a close-run thing, it looks as if we've had the dullest
*any* summer month (JJA) in that same record, by just under 4hr.

The average daily sunshine for June 2012 = 3.4 h/day; using the same
instrument's average (8 years) would suggest we should have ~6.6 h/day,
so not far off half-of-average when compared to most recent years.

Only 10 days had = 5hr of sunshine (and often broken), and just 2 days
(18th and 19th) 10 hr each.

Martin.



How does the second half of June compare with the first half? I get the
impression that the second half of June was not that far from average,
which would emphasise just how bad the first half was.