Typical crowd level each month (relative), averaged over the attractions of each city. Shorter bar = fewer people.
London and Paris have broadly similar crowd levels overall.
Based on historical visitor patterns, January is usually the quietest month in London.
Based on historical visitor patterns, January is usually the quietest month in Paris.
In London the quietest day is usually Monday; in Paris, Monday. Weekdays early in the morning are the safest bet in both.
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