Summer
June through September are typically warm, with little or no rain.
Without the Bay Area fog, Harbin can be 30 degrees warmer than
San Francisco this time of year. Evenings can be 20-30 degrees
cooler than the days, so bring layers.
Fall/Winter/Spring
October through May can range from surprisingly sunny and warm,
to rainy and cold. (Snow is very rare.) It's always a good idea
to come prepared for showers.