Good advice from Kellie above
. Talk Budgies advocates only taking your bird outdoors in a secure cage, and under supervision. They are far too small to be safe outside otherwise, and even birds with clipped wings can fly surprisingly well if startled, even with a light breeze or no breeze.
Provide cover on one end of the cage, for the birds to escape direct sun, and always remember to check water for evaporation in the heat.
We advise not leaving budgies unattended outdoors (even though in a cage). You’d be surprised at how often it’s heard of where a cat or other predatory animal got their paw inside the cage (even 1/2” bar spacing) and either seriously injured or killed the bird. Seems unlikely or impossible, but unfortunately it’s not.
Also remember budgies being birds are ‘prey animals’, and is a bit different from socializing dogs and puppies. Watch your bird’s body language, and always respect their boundaries. It can take many months of consistency to tame and socialize a ‘wild’ budgie to their fullest potential. Then keep in mind, some budgies tend to tame more than others.