Ive heard of snow in early-mid june but never come across any strong evidence of snowfall in july (or August/September). The closest I can find is this event:
Now the 850hpa temps are remarkabely low for July, only slightly above 0C in parts of the UK. However a very big ask to get snow in 850s this high still. Nevertheless the snow reports occured during the early morning, a few hours after this chart. You would need extremely heavy precipatation to be able to get snow. Unfortunately it was probably soft hail then and the reports were in error, still do you think there is any possibility of snow in July-September given the perfect synoptics?
I can't find any reports of this one, but it seems 10th July 1965 might have even come a bit closer
If we had had a direct northerly during this month instead of glancing blows, who knows?
Edited by user
24 March 2014 18:03:51
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Reason: Not specified
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2023/2024 Snow days (approx 850hpa temp):
29/11 (-6), 30/11 (-6), 02/12 (-5), 03/12 (-5), 04/12 (-3), 16/01 (-3), 18/01 (-8), 08/02 (-5)
Total: 8 days with snow/sleet falling.
2022/2023 Snow days (approx 850hpa temp):
18/12 (-1), 06/03 (-6), 08/03 (-8), 09/03 (-6), 10/03 (-8), 11/03 (-5), 14/03 (-6)
Total: 7 days with snow/sleet falling.
2021/2022 Snow days (approx 850hpa temp):
26/11 (-5), 27/11 (-7), 28/11 (-6), 02/12 (-6), 06/01 (-5), 07/01 (-6), 06/02 (-5), 19/02 (-5), 24/02 (-7), 30/03 (-7), 31/03 (-8), 01/04 (-8)
Total: 12 days with snow/sleet falling.