It's not that bad in my opinion. We have a mild climate. Looking on the bright side we don't get heavy snowfall or droughts or heat waves. Personally I like the lack of extremes.
The problem is that in the context of startups, you are competing with Silicon Valley, which also has no snowfall, no serious heat waves, and 80% sunny vs. 80% rainy.
So that means Silicon Valley has the 3 most fearful enemies: fresh air, sunshine and the unbearable roaring of birds? -- Thanks, I'll go with the 80% rain :)