There are several insects that are negatively impacted by rainfall. Exposed leaf beetles and caterpillars on trees, shrubs and crops can be washed off and drowned. Such conditions also favor development of fungal diseases of aphids. Perhaps it is because of increased awareness of the honeybee declines and subsequent increased attention to pollinators, but I am hearing more comments about bumblebees. Unlike honeybees they are native to the region and are extremely important pollinators of many native plants, perhaps being most obvious at alpine elevations.
Bumblebees are social insects, but produce an annual colony.
They seek protected areas during winter and issue out in spring looking to establish colonies. Most often bumblebees use abandoned rodent burrows for nesting. However, they sometimes are found in old mattresses, inside abandoned vehicles, or among insulation within walls. Regardless, nests almost invariably are established where there is insulating debris that is used in nest construction. Initially the overwintered queen does all activities required for colony development.