In the early mornings in July / August it can easily be -4 / -2 celsius, warming up to 8 degrees, with some days topping 12 degrees. Winters have been getting worse here it seems -- right now we've got an Antartic wind and it's only been 7 degrees in the morning -- and today they said -4 in Provincia, and we're just in mid-May!
Also, there is no central heating here -- and no insulation, so although it may not be as cold outside as in parts of the USA, it can be colder inside! Although their winters are similar to Vancouver, Canada (with less rain), I don't think anyone here has heard of weather stripping their windows. My last apartment was 900 sq ft and only had 2 small heaters in it, that essentially heated a 2 ft radius around them! I ended up pulling my desk in front of one of them and working in front of it all day.
I'm a bit of a wuss, but I did bring down my summer-weight duvet from Canada and we use it as a winter duvet here.
If you're a wuss like me and get cold easily, bring/buy a proper wool coat -- I don't agree that you need the waterproof stuff -- when it rains, yes it POURS here, but we aren't talking about Seattle. It's more like a 2 hr monsoon and then nothing for a few days straight. Proper shoes, yes, Gortex jacket, only if you want to look like you're from the Northwest.