Pluviôse was the fifth month in the French Republican Calendar. The month was named after the Latin word pluviosus 'rainy'.

The French Republican calendar, also commonly called the French Revolutionary calendar, was a calendar created and implemented during the French Revolution, and used by the French government for about 12 years from late 1793 to 1805, and for 18 days by the Paris Commune in 1871, and meant to replace the Gregorian calendar.