Doesn't it usually snow before Christmas in UK these days? I ask because our weather in Vietnam has slipped back a good month in the past 20 years: we get only minor temperature variance year-round (and no more than 3degC in any 24-hour period), but we used to get monsoonal rain in southern VN April-October - and now it's May-November! I'll be taking the rear mudguard extension off my mountain bike next week because we won't see a single drop of rain for the next 6 months.