Raw food on days with snow and raw winds

Can you really, should you really, eat 100% raw food when the weather is as it is right now in Britain, that is, icy cold and snowy?

I don’t worry about percentages myself because I don’t want to set up an expectation of myself and to make what I eat into pass/fail, but since my fingers are getting a bit chilly here at my desk – even though I have central heating – I’ll go and rustle up a raw lunch that is warming and add the recipe here straight after lunch.