We had to stand in the pouring rain for 45 minutes, and then in a hallway for another hour, but Lincoln eventually got his shot.
The rain wasn't bad for him, he was in his coat and hat, sitting in his stroller with the cover over him, and a fleece blanket up to his chin. He wasn't wet at all by the time we got inside...I was a different story however. The line moved quickly once we got inside, and the shot was pretty painless.
I feel like the rain and waiting could be counter productive to actually getting the shot, but I'm glad he got it anyway.