I recently spent a full day in near freezing rain with my then month old X-T1 and 16-55 f2.8. Weather proofing is excellent and for what your proposing I'd highly recommend the T1 and a WR lens for this reason alone.
The 16-55 is a lovely lens though on the heavy side but suites me as it is the equivalent of my go to 24-70 Nikon. I won't recommend a specific lens as that's your choice, just get it from weather sealed lineup.