In sporting circles, the advent of match day rain is unwaveringly referred to as "the great leveller". It's used in codes from rugby through to Formula One motor racing.
Yet, I'm inclined to think it's not as simple as that, given it's contingent on the sport being played.
For example, duckshooters love the wet stuff as it forces their quarry to fly lower. It makes for lousy golf and, for racing fans, it makes it much tougher to place an educated punt.
The expression was also used in the Great War. Specifically it referred to the horrid spectre of those in Western Front trenches who spent an age battling incessant mud, which was, without doubt, a great leveller. In that context, rain changed the course of history.
While those of us with office jobs can't begin to empathise with people on the land whose top soil slips away, or the market gardeners whose seedlings drowned this week, there's definitely something levelling about rain's appeal.