‌小升初英语作文中描述天气寒冷的内容可以从以下几个方面展开‌：

1. ‌天气状况‌：描述寒冷的天气时，可以提到气温低、风大、湿度高等特点。例如：“It's freezing outside! The weather is so cold that I can barely feel my fingers and toes. The wind is blowing fiercely, making it even colder. I'm shivering and my teeth are chattering. I can see my breath in the air, which means the temperature must be below zero.”‌

2. ‌人们的感受和活动‌：描述人们在寒冷天气中的感受和行为。例如：“People don’t like to go outside. They have to wear heavy coats, scarves and gloves. But children like to be outside because it often snows. They can throw snowballs, make snowmen, and even skate on the frozen river.”‌

3. ‌对日常生活的影响‌：描述寒冷天气对日常生活的影响，比如出行不便、室内活动增多等。例如：“It's much colder when it rains. Besides, when it rains, the outside is all wet and dirty that makes you keep your feet in door.”‌

4. ‌文化背景和节日‌：可以提及一些与寒冷天气相关的文化背景或节日，比如冬季的节日庆祝活动。例如：“Winter is the time everyone is in a festive mood. During the holidays, I usually go to the village where the climate is warmer, and I look forward to seeing my grandmother, great-grandmother, and my friends there. I also enjoy my grandmother's food very much.”‌

通过这些方面的描述，可以让读者更好地理解寒冷天气的具体表现和对人们生活的影响。