We’ve had DirecTV for about five years, and I’ve only noticed an interrupt in service during very severe downpours - maybe a couple of times during that whole period. We’ve never had enough snow for it to be affected.
By contract, our Comcast internet service was down at least once a month for several hours to a day or two, which is why we finally got rid of them.
Wow, that’s a bad contract. I wouldn’t have signed it. 
I’ve had DirecTV on the east coast of Florida for almost eight years now, and the only times I’ve lost reception is when I’ve lost power to the house. Never once lost reception during the '04 storm season, or during any other storms thereafter. It’s been rock solid.
Chicago has been slightly more problematic, and I will occasionally lose signal during very strong storms, but I think it’s mostly because of the way the dish is mounted and the location. It’s on the roof of our unit, four stories up, and mounted on a “sled” (as DirecTV calls it); basically a metal framework that sits on the roof and is weighted down with concrete blocks. The dish is more exposed to the winds than it might be elsewhere, and I think there’s a little more play in the whole set-up than if it was bolted to a roof, or wall, or something like that. Still, it doesn’t happen all that often.
On the whole, I’ve been very pleased with them.
:smack: contrast
I have directv. We got it installed and t went out about 2 weeks later when we got a little wind. Not being entirely impressed with their installers I decided to get out the ladder and have a look. It would appear they adjusted it until it worked and then failed to tighten the hardware. I played with it until it was all 98% or more and tightened everythin down and it has been perfect since.
I am a Bell subscriber in Canada but my hardware has the Dish logo on it so I am assuming they are similar products.
The only thing I can add, is that if you are at all worried, don’t bother with the stock or default dish (18" diameter). They sell sell larger dishes, I think 24" is one size. Look into that, on snowy, or heavy rainy days I sometimes wish I had. Although, with a well stocked PVR it’s not as critical anymore.
I have Directv and rarely have problems with rain, perhaps one or two times a year during monsoons. However, I also get the local channels* out of El Paso on Directv. El Paso is about 50 miles away, and poor weather (wind or rain) there seems to disrupt the El Paso CBS stations uplink to Directv more often. Everything else comes in fine, but the CBS stations get a bit unreliable.
*yes, I could get these stations over the air, but I like to be able to have them on Directv so I can use the DVR with them.
I had Dishnetwork in Central Arkansas. I’m in the woods, and there are leaves in the way. Heavy rain cases the signal to be lost. My C band TV doesn’t lose the signal despite leaves and rain. Snow zaps them both.
If I use Dish again, I will try to get the “Hawaii Antenna”, which is larger and own the receiver rather than lease it and pay them whatever they call their recording fee.
I have DirecTV it takes a very black storm cloud to knock out my tv reception.
Ice or snow on the Dish can knock out reception. I’ve gone out a couple times after an Ice storm and cleared the ice from the dish.