I've done the same for years, had my cameras soaked by snow or rain. I do my best to shield them, but I can't shoot if it sits on the shelf. I travel worldwide and take the opportunity to shoot when I have it. I may not get another chance. I was in Antarctica on a ship and figured I would rather shoot than leave the camera inside. That was an older camera though. I believe I was shooting a Nikon then. Don't dunk the camera, but rain won't kill it, just keep it covered as much as possible. My 50D has suffered at my hands for three years and is going strong. Often, in the case of Fall colors, a wet leaves will give you a much better image than dry dust covered ones. I had an old Nikkormat whose meter stopped working while I was shooting covered bridges. I kept shooting, setting the exposure based on the conditions, and once I got back to the truck, I pulled the battery, it was wet. I dried it and all worked well. Of course that is an all manual camera so there are no real electronics to be damaged.
My old 350D was treated the same. It lasted despite being soaked with water and once was soaked by beer while celebrating the upcoming New Year in Montevideo, Uruguay with the locals in the street. It was a big beer fight in the streets. I was soaked from head to toe in beer and so was the camera. I wouldn't have missed it for the world. A friend snapped this image of me being carried through the crowd by the locals. At this point I was still fairly dry. I did at one point put my camera in a friend's bag, but by then the camera was already wet. I had a sticky button once I got back to the ship and since I was in South America for another month or so and had no opportunity to send it for repair, I cleaned it carefully with fresh water and let it dry. To clean the button I splashed water into the button with the camera upside down so the water wouldn't run into it past the button, then let it dry thoroughly with the battery out before using it again. It continued to work well until I got the 50D.