询问天气的常用英语表达如下：
基础句型
- How's the weather today？
- What's the weather like today？
其他常用表达
- How's the weather in [城市名] today？
- Is it raining/sunny/overcast today？
- What time of year is it？
扩展用法
- How's the weather going？
- Can you tell me the weather forecast for tomorrow？
这些表达可根据具体语境灵活使用，例如：
评论天气：It's a beautiful day, isn't it？
特殊场景：How's the weather in [城市名] during the summer？
建议优先使用 What's the weather like today？这一标准表达，既自然又通用。