The weather forecast says it's the hottest today.

According to the information in the picture, (1) the highest temperature in Jinan today is 35℃, and the lowest temperature is 26℃. The weather changed from cloudy to sunny. (2) There are thunderstorms in Changchun today; (3) According to life experience, it is summer when the temperature reaches 35℃, so the length of day and night in Jinan varies.

So the answer is: (1) 35; 26; Cloudy to sunny; (2) Thunderstorm weather; (3) answer.