what is Loei like the coldest weather in the country or something? The drivable mountain peaks around here are 1200m and I don't think they're going to get 8c tomorrow but I've never actually been there in the early mornings to measure.
Weather in CM is hot garbage. Too much pollution and cars put a heat blanket over the entire region. People tell me it's colder in Isaan now. There's a tip for Bob, stay away from Chiang Mai, at least 100 kilometers in any direction.