In message , at 17:51:28 on Sun,
15 Oct 2017, Theo remarked:
I worked in an organisation in Cambridge where 'probably' the majority
cycled to work. I knew of nobody who changed their mode from cycling in
bad weather. {There is no such thing as bad weather only bad clothing} I
did have different shoes & sandals at work, and if it were raining hard
I'd take a spare pair of socks. Yes 'optional' trips by bike will drop
in bad weather. I'm now retired so would change shopping day if weather
bad. A higher percentage of trips than you might expect are optional. I
know from a previous job that congestion is worse on wet days, even in
towns/cities with few commuting by cycle (eg Sheffield). Getting
accurate data is difficult. I tried... Both the rain gauge and cycle
counter data I was given were clearly in error when closely examined.
Getting better data to repeat excercise is on my 'to do ' list.

It's a bit easier these days because you can look at the detailed forecast
and the rain radar and say 'I'll go now before it rains' or 'I'll wait half
an hour for it to pass', in the same way you can look at live departure
boards before setting out and adjust your journey if there are delays.

That assumes a degree of flexible working (and flexible family life)
which not everyone enjoys.
--
Roland Perry