Before You Go: Visas and Timing
China is not visa-free for most Western travelers — see our full visa guide before booking flights, since the rules differ sharply by nationality and the 240-hour transit exemption only works with the right onward routing.
On timing: Beijing's best weather and air quality generally fall in September and October — see our air quality guide — while winter (Nov-Mar) brings the worst smog days alongside genuinely cold, dry weather, and summer (Jun-Aug) is hot, humid and occasionally smoggy from a different cause (ozone and heat rather than coal heating).

