Typhoon Season
Although Mother Nature doesn't care much about the Gregorian Calendar, typhoon season typically begins in May and tapers off around the end of October. A majority of the typhoons that hit Hong Kong occur during July, August, and September, but there is always the chance an early one will turn up in June.
Pay attention when big weather systems move into the area. Even if they don't make landfall, your flights may be affected.
What to Pack
June can be a little bit tricky for packing properly. The start of summer brings hot afternoons and then cool evenings, especially at higher altitudes. Of course, if you will be in the hot-and-humid parts of China, air conditioning will be cranking at full speed. If you are sensitive to air conditioning, you might need a light sweater for inside. As June is one of the wettest months in China, you will need to be prepared for that as well.
Bring a light, airy base layer such as shorts and short-sleeved shirts. China is very casual, so you will rarely be considered "under dressed." Sleeveless tops and shorts are suitable for women as well as men, unless you'll be visiting Muslim regions such as Xinjiang. Also, you'll need to dress conservatively to enter Tibetan temples.
Bring rain gear
If you have a respiratory condition, you may consider packing a quality mask for days when air pollution is bad in cities. The rain in June should help clean the air, but being prepared is wise. Masks are available for sale everywhere (locals often wear them), however, quality and functionality aren't guaranteed if you buy one on the street.
June Events in China
Although June is a relatively busy month for tourism in China, there aren't many festivals that will affect your trip.
Dragon Boat Festival: Dates for the festival vary on the lunisolar calendar, but it's often held near the summer solstice. Even though the Dragon Boat Festival (numerous events are held throughout China) is a public holiday, people don't travel far and wide like they do during holidays such as Chinese New Year and National Day (October 1). You won't have to worry too much about large crowds and bogged-down public transportation—just choose a place to enjoy the interesting festival!
June Travel Tips
June is a beautiful time to visit areas that are famous for flowers and nature, such as Hangzhou, Yunnan Province, the Yellow Mountains, and Guilin. Many schools are still in session in early June, so you can still avoid the summer holiday travel season when peak crowds hit many major destinations.
Expect pop-up showers at any time! Standing in the middle of Tiananmen Square with your passport and camera is a bad time to realize you left your umbrella back at the hotel.
Although many travelers agree that fall may be the most ideal time to visit China, summer can be enjoyable, too!