Paris carries 72 curated activities across 6 interest lenses. Adventure, History & Heritage, Food & Drink, Nightlife & Evening, Family & Kids, and Rainy-Day & Indoor each hold a shortlist of 12. The composition tells you something about planning a Paris trip. August averages 10 rain days, September 11, so the Rainy-Day & Indoor shortlist tends to earn its place on most visits. Food & Drink and Nightlife & Evening sit as separate lenses, reflecting a city where dinner and the evening that follows it are planned as distinct outings.
You can work through all 6 lenses in a week without doubling back. Use Nightlife & Evening after dark to extend shorter autumn days, and lean on Rainy-Day & Indoor picks when the forecast turns. The Family & Kids lens holds its own 12 activities apart from the other shortlists, so families have a clear starting point. September's average high of 22°C keeps the Adventure and History & Heritage lenses comfortable for walking, cooler than August's 25°C.
August in Paris averages 25°C highs and 10 rain days, so expect rain roughly every third day of the month.