It is being reported that this is a record-beating mild Halloween.
But a mild Halloween is not that unusual.
Last year it was mild into November - I noted it particularly as I was on a white water kayaking course where I couldn't wear gloves as I was afraid of losing them when I came out in a stopper. And I was capsizing and "swimming" several times a session.
In my perpetual calendar I've noted in 2013 and 2010 a Halloween paddle (this would have been after it had got dark) where I wasn't wearing gloves or a hat. These are the only 2 Halloween paddles I've been on, so there could easily have been other mild Halloweens I hadn't particularly noted.
Paddling does make me very aware of the weather. There are often weekends where I would have thought it had rained all weekend if I hadn't been paddling in the dry, and sometimes even the sunshine, whatever the weather the rest of the time!