I wouldn't be concerned about them being exposed to rain on a walk from the car to the venue.
But I also wouldn't trust mine to withstand continued exposure to soaking rain or being left in a puddle - fabric and zippers have their limits...
When a watch capable of withstanding immersion to 100 meters must be described as 'water-resistant,' 'water proof' is quite a high bar.
An ATA case such as a Hardigg, SKB, or Pelican with pressure-equalizing O-ring seals is probably as "highly water resistant" as you're likely to see.
There are some very new polymer double road cases that are getting good reviews but I've never seen one in person.
Anything with that level of protection is likely to be heavy and expensive...
We get heavy rains here in PA, and I'm not worried about the contents of any of my Mono cases getting harmed during 'reasonable' exposure.