dekad noun1 •Ten days, especially of rainfall. Generally identified as dekad 1: 1ˢᵗ-10ᵗʰ, dekad 2: 11ᵗʰ-20ᵗʰ, and dekad 3: 21ˢᵗ-last day of each month.Figure 1 displays the current position of the ITF relative to the long-term average position during the 2nd dekad of June and its previous position during the 1st dekad of June. — 2022 formsdekads
