Viikoissa

Viikoissa is the inessive plural form of the Finnish noun viikko (week). It means “in the weeks” or “within the weeks” and is used to indicate location in time that spans several weeks.

In Finnish, the inessive case marks location inside something; in the plural this becomes viikoissa. The form is commonly used when referring to a time period that covers multiple weeks, such as reporting periods, schedules, or research timelines. It is natural in written and formal contexts and often appears with numbers or ranges, for example viikoissa 12–14 or viikoissa 1–2.

Examples include: Viikoissa 12–14 myynti kasvoi. Viikoissa 1–2 satoi paljon lunta. Viikoissa voidaan myös sanoa yleisemmin useiden viikkojen aikana, esimerkiksi “useiden viikkojen aikana” tai “useamman viikon kuluessa”, which convey similar timing without specifying weeks explicitly.

Viikoissa contrasts with viikossa (in the week) and with other forms such as viikkojen (genitive plural) or viikkoja (partitive plural). The choice depends on whether the reference is to a location inside weeks (viikoissa) or to a single week (viikossa). Understanding viikoissa helps in framing time spans, schedules, and data over multiple weeks in Finnish.