A light bulb is a light bulb, right? Wrong. Light bulbs that will be exposed to moisture, rain, or snow need to be designed specifically to withstand those kinds of elements.
Outdoor rated bulbs will have fine print either on the bulb itself or on the packaging indicating its ability to survive cold and damp conditions. If you can’t find this type of bulb in the standard spots, try looking at bulbs for freezers and refrigerators. There is a chance they might cross over and have a rating for the outdoors as well.
If you go to the trouble of climbing up and down the ladder and replacing the lights in your eaves and on your porch, make sure you are using outdoor rated bulbs, so you don’t have to go through the hassle of changing all of them.