What's the temperature along the 3 18 national highway in June?

It's about 30 degrees between Shanghai and Ya 'an, which may be higher. The temperature in Erlang Mountain drops by about 3 degrees, and it will be a little colder at night after Zheduo Mountain. Every time the altitude rises 1000m, the temperature drops by 6 degrees. In the same weather, the temperature difference between Zheduo Mountain Pass and xinduqiao is 4-5 degrees, and the temperature difference between day and night depends on the wind speed. Hope to adopt