This looks like scorch, which is tissue damage from environmental conditions. It may be a delayed symptom from a frosty night after the leaves had expanded, or due to a lot of direct sun exposure combined with insufficient root moisture. Unless you've been watering occasionally, the ongoing drought is stressing some plants. If you haven't watered the scorched plants, feel the soil a few inches deep near the roots and water thoroughly if it's become somewhat dry to the touch at that depth. If these are young Columbine plants or seedlings, their root system won't be very extensive, so their access to moisture is also limited. Leaf damage cannot heal, so this symptom won't go away after the plant is not longer stressed, but since the damage is not due to a pest or disease, it's not a major issue as long as the roots remain healthy.

Is that location very sunny after any nearby trees fully leaf-out? If so, you may want to move the Columbine at some point, as they are largely found in semi-shade or open woods in the wild, where they get a bit of sun but also some dappled shade during the heat of the day.

Miri