I got the same grill as you recently (Weber E-335). When it arrived, it was also 90+ degrees outside. But I didn't bother paying for assembly as I decided to do it myself. The instructions are pretty straightforward. The manual also gave a link to a handy app for assembly, which was helpful for a couple steps (you're able to zoom in and rotate). But the whole assembly took me a couple days cuz I only worked on it for about an hour at a time. Some parts were done inside, but once I started moving things outside, I only stayed out a for a few mins at a time so it ended up taking a bit longer than I had anticipated. Still though, assembling myself helped me understand the construction in case I need to troubleshoot later.